к.т.н.
Публикации
2021
Tomarov, G. V.; Borzenko, V. I.; Shipkov, A. A.
Application of Hydrogen–Oxygen Steam Generators for Secondary Flash Steam Superheating at Geothermal Power Plants Journal Article
In: Thermal Engineering, vol. 68, no. 1, pp. 45-53, 2021, (cited By 1).
@article{Tomarov202145,
title = {Application of Hydrogen–Oxygen Steam Generators for Secondary Flash Steam Superheating at Geothermal Power Plants},
author = {G. V. Tomarov and V. I. Borzenko and A. A. Shipkov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100605035&doi=10.1134%2fS0040601520120101&partnerID=40&md5=ec7a3e0f5d6dd61c209e81e662542519},
doi = {10.1134/S0040601520120101},
year = {2021},
date = {2021-01-01},
journal = {Thermal Engineering},
volume = {68},
number = {1},
pages = {45-53},
abstract = {Abstract—: One of the promising areas of applying hydrogen technologies in power engineering is to increase the capacity utilization factor and efficiency of turbine units by means of hydrogen–oxygen steam generators for superheating the working medium under the conditions in which the surplus electricity generated at power plants during the periods of daily and seasonal reduction in electric power consumption can be used for generating hydrogen. The use of steam superheating systems on the basis of hydrogen–oxygen steam generators at geothermal power plants is especially important in view of a low energy potential of geothermal heat carrier serving as the initial heat source. The article presents the results from computational studies of the technical advisability and technical-economic efficiency of implementing systems for increasing the secondary flash steam energy potential by using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant operating on steam hydrotherms. The results from computational studies into the power characteristics of a combined binary cycle geothermal power plant with secondary flash steam superheating depending on the expansion pressure variations and the hydrogen–oxygen steam generator capacity are considered. It has been determined that the use of a 12-MW hydrogen–oxygen steam generator for superheating secondary flash steam results in that the steam wetness downstream of the steam turbine last stage decreases from 14 to 7%. Calculation results have shown that the topping of a direct-cycle geothermal power plant with a system for increasing the energy potential of secondary flash steam on the basis of a hydrogen–oxygen steam generator and a binary power plant makes it possible to increase the geothermal power plant capacity by almost 25% and its efficiency by 3.0–3.5%. Based on the feasibility study results, investors can select the optimal composition and characteristics of equipment in implementing a system for increasing the energy potential of secondary flash steam using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant. © 2021, Pleiades Publishing, Inc.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract—: One of the promising areas of applying hydrogen technologies in power engineering is to increase the capacity utilization factor and efficiency of turbine units by means of hydrogen–oxygen steam generators for superheating the working medium under the conditions in which the surplus electricity generated at power plants during the periods of daily and seasonal reduction in electric power consumption can be used for generating hydrogen. The use of steam superheating systems on the basis of hydrogen–oxygen steam generators at geothermal power plants is especially important in view of a low energy potential of geothermal heat carrier serving as the initial heat source. The article presents the results from computational studies of the technical advisability and technical-economic efficiency of implementing systems for increasing the secondary flash steam energy potential by using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant operating on steam hydrotherms. The results from computational studies into the power characteristics of a combined binary cycle geothermal power plant with secondary flash steam superheating depending on the expansion pressure variations and the hydrogen–oxygen steam generator capacity are considered. It has been determined that the use of a 12-MW hydrogen–oxygen steam generator for superheating secondary flash steam results in that the steam wetness downstream of the steam turbine last stage decreases from 14 to 7%. Calculation results have shown that the topping of a direct-cycle geothermal power plant with a system for increasing the energy potential of secondary flash steam on the basis of a hydrogen–oxygen steam generator and a binary power plant makes it possible to increase the geothermal power plant capacity by almost 25% and its efficiency by 3.0–3.5%. Based on the feasibility study results, investors can select the optimal composition and characteristics of equipment in implementing a system for increasing the energy potential of secondary flash steam using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant. © 2021, Pleiades Publishing, Inc.
Blinov, D. V.; Borzenko, V. I.; Bezdudny, A. V.; Kazakov, A. N.
Metal hydride hydrogen storage and purification technologies Conference
vol. 2039, no. 1, 2021, (cited By 0).
@conference{Blinov2021,
title = {Metal hydride hydrogen storage and purification technologies},
author = {D. V. Blinov and V. I. Borzenko and A. V. Bezdudny and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119679560&doi=10.1088%2f1742-6596%2f2039%2f1%2f012005&partnerID=40&md5=250e27dd35a9985271ec61e94d01d6b6},
doi = {10.1088/1742-6596/2039/1/012005},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2039},
number = {1},
abstract = {The results of the development of metal hydride (MH) reactors for the storage and purification of hydrogen of various types are presented. Two methods of metal hydride purification of hydrogen are presented. The use of the MH method of flow-through purification of hydrogen has high hydrogen recovery rates at high volume contents of hydrogen in the mixture (≥10% vol.), while the method of periodic evacuation of accumulated impurities is most effective at low hydrogen contents in the mixture (<10% vol.). © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The results of the development of metal hydride (MH) reactors for the storage and purification of hydrogen of various types are presented. Two methods of metal hydride purification of hydrogen are presented. The use of the MH method of flow-through purification of hydrogen has high hydrogen recovery rates at high volume contents of hydrogen in the mixture (≥10% vol.), while the method of periodic evacuation of accumulated impurities is most effective at low hydrogen contents in the mixture (<10% vol.). © 2021 Institute of Physics Publishing. All rights reserved.
Romanov, I. A.; Borzenko, V. I.; Kazakov, A. N.
vol. 2057, no. 1, 2021, (cited By 0).
@conference{Romanov2021,
title = {Comparing hydrogen absorption kinetics of the samples of intermetallic compound and metal hydride compact on its basis},
author = {I. A. Romanov and V. I. Borzenko and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119615732&doi=10.1088%2f1742-6596%2f2057%2f1%2f012043&partnerID=40&md5=75d733724ea1fda713219ca2a07e48d6},
doi = {10.1088/1742-6596/2057/1/012043},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2057},
number = {1},
abstract = {This work is devoted to an experimental study and comparison of the kinetics of hydrogen absorption by an intermetallic compound LaNi4.4Al0.3Fe0.3 in form of pure intermetallic compound free backfill and a compact based on it obtained by cold pressing with a spiral matrix of nickel-foam. To calculate the kinetic parameters of the hydrogen absorption reaction, the initial rates method is used. The PCT absorption isotherms are measured at temperatures of 313, 333, and 353 K. The experimental data are described with quite high confidence by the chosen model, which assumes that the reaction rate controlling step is the dissociative absorption of hydrogen on the surface of the α-phase. The rate of hydrogen absorption increases with increasing pressure drop and temperature. It is shown that the rate of hydrogen absorption by the sample of pure IMC is significantly less dependent on temperature compared to the compact sample. In addition, the reaction rate at temperatures of 313 and 333 K is higher for the free backfill sample, and at 353 K it is higher for the metal hydride compact. The values of the absorption constant and the activation energy of the hydrogen absorption reaction are determined for both samples. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
This work is devoted to an experimental study and comparison of the kinetics of hydrogen absorption by an intermetallic compound LaNi4.4Al0.3Fe0.3 in form of pure intermetallic compound free backfill and a compact based on it obtained by cold pressing with a spiral matrix of nickel-foam. To calculate the kinetic parameters of the hydrogen absorption reaction, the initial rates method is used. The PCT absorption isotherms are measured at temperatures of 313, 333, and 353 K. The experimental data are described with quite high confidence by the chosen model, which assumes that the reaction rate controlling step is the dissociative absorption of hydrogen on the surface of the α-phase. The rate of hydrogen absorption increases with increasing pressure drop and temperature. It is shown that the rate of hydrogen absorption by the sample of pure IMC is significantly less dependent on temperature compared to the compact sample. In addition, the reaction rate at temperatures of 313 and 333 K is higher for the free backfill sample, and at 353 K it is higher for the metal hydride compact. The values of the absorption constant and the activation energy of the hydrogen absorption reaction are determined for both samples. © 2021 Institute of Physics Publishing. All rights reserved.
Schastlivtsev, A. I.; Borzenko, V. I.
vol. 2039, no. 1, 2021, (cited By 0).
@conference{Schastlivtsev2021,
title = {Features of thermodynamic and thermal processes in hydrogen combustion units and systems on their basis},
author = {A. I. Schastlivtsev and V. I. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119674095&doi=10.1088%2f1742-6596%2f2039%2f1%2f012032&partnerID=40&md5=4d6ebaf8d165b22c1769893ee47e046a},
doi = {10.1088/1742-6596/2039/1/012032},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2039},
number = {1},
abstract = {The main types and designs of hydrogen combustion units (HCU), including hydrogen-oxygen steam generators, superheaters and air heaters of various power levels, are considered. The main problems arising in the development, creation and testing of such installations are determined, including the problems of cooling the most heat-stressed units, mixing of the main components of the fuel and oxidizer, mixing of high-temperature combustion products and ballasting components, problems associated with the completeness of hydrogen combustion and ensuring safety during operation. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The main types and designs of hydrogen combustion units (HCU), including hydrogen-oxygen steam generators, superheaters and air heaters of various power levels, are considered. The main problems arising in the development, creation and testing of such installations are determined, including the problems of cooling the most heat-stressed units, mixing of the main components of the fuel and oxidizer, mixing of high-temperature combustion products and ballasting components, problems associated with the completeness of hydrogen combustion and ensuring safety during operation. © 2021 Institute of Physics Publishing. All rights reserved.
Dunikov, D. O.; Borzenko, V. I.; Blinov, D. V.; Kazakov, A. N.; Romanov, I. A.; Leontiev, A. I.
Heat and mass transfer in a metal hydride reactor: Combining experiments and mathematical modelling Conference
vol. 2057, no. 1, 2021, (cited By 0).
@conference{Dunikov2021,
title = {Heat and mass transfer in a metal hydride reactor: Combining experiments and mathematical modelling},
author = {D. O. Dunikov and V. I. Borzenko and D. V. Blinov and A. N. Kazakov and I. A. Romanov and A. I. Leontiev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119610101&doi=10.1088%2f1742-6596%2f2057%2f1%2f012122&partnerID=40&md5=70d88d8f2d9960a523bcc76b05dc7251},
doi = {10.1088/1742-6596/2057/1/012122},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2057},
number = {1},
abstract = {Heat transfer in porous metal hydride (MH) beds determines efficiency of MH devices. We present a COMSOL Multiphysics numerical model and experimental investigation of heat and mass transfer in a MH reactor filled with 4.69 kg of AB5 type alloy (Mm0.8La0.2Ni4.1Fe0.8Al0.1). To achieve an agreement between the model and experiments it is necessary to include a flow control device (inlet valve or flow regulator) into the model. We propose a simplified and easy-to-calculate boundary condition based on a porous domain with variable permeability at reactor inlet. The permeability of the domain is connected with hydrogen mass flow by a PID controller. Thus, boundary conditions for the inlet pressure and mass flow are coupled and heat transfer inside the reactor could be calculated without additional assumptions applied to heat and mass transfer in the MH bed. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Heat transfer in porous metal hydride (MH) beds determines efficiency of MH devices. We present a COMSOL Multiphysics numerical model and experimental investigation of heat and mass transfer in a MH reactor filled with 4.69 kg of AB5 type alloy (Mm0.8La0.2Ni4.1Fe0.8Al0.1). To achieve an agreement between the model and experiments it is necessary to include a flow control device (inlet valve or flow regulator) into the model. We propose a simplified and easy-to-calculate boundary condition based on a porous domain with variable permeability at reactor inlet. The permeability of the domain is connected with hydrogen mass flow by a PID controller. Thus, boundary conditions for the inlet pressure and mass flow are coupled and heat transfer inside the reactor could be calculated without additional assumptions applied to heat and mass transfer in the MH bed. © 2021 Institute of Physics Publishing. All rights reserved.
Romanov, I.; Borzenko, V.; Eronin, A.; Kazakov, A.
Influence of electrostatic field on the interaction of AB5-type alloy LaNi4.4Al0.3Fe0.3 with hydrogen Journal Article
In: International Journal of Hydrogen Energy, vol. 46, no. 25, pp. 13632-13637, 2021, (cited By 0).
@article{Romanov202113632,
title = {Influence of electrostatic field on the interaction of AB5-type alloy LaNi4.4Al0.3Fe0.3 with hydrogen},
author = {I. Romanov and V. Borzenko and A. Eronin and A. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096534062&doi=10.1016%2fj.ijhydene.2020.10.207&partnerID=40&md5=6799237850882888f802b1b191b53a12},
doi = {10.1016/j.ijhydene.2020.10.207},
year = {2021},
date = {2021-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {46},
number = {25},
pages = {13632-13637},
abstract = {The effect of the electrostatic field on hydrogen absorption is experimentally studied for the case of AB5-type intermetallic compound LaNi4.4Al0.3Fe0.3 with low equilibrium pressure. Experimental facility contained control and measurement system for PCT-isotherms and a non-conductive polymer vessel immersed in a bath of a thermostat with transformer oil. The test sample with 100 g of the activated alloy powder was used. Electrostatic field was created between a copper tube, which simultaneously served as a hydrogen inlet, connected to a high voltage source and a grounded nickel plate rolled in the form of a cylinder around the outer wall of the vessel. The electrodes were arranged coaxially, the maximum voltage on the internal electrode was 15 kV. The high voltage source also allowed changing the polarity on the internal electrode. It was found that the electrostatic field had no effect on the already established equilibrium in the hydrogen-alloy system at a voltage at the electrode up to 15 kV, regardless of the polarity. However, the process of hydrogen absorption is noticeably slowed down when a voltage of up to 15 kV with negative polarity is applied to the internal electrode, and the effect increases with increasing voltage. At a voltage of 15 kV and the positive polarity of the internal electrode, there was no noticeable effect on the hydrogen absorption process. © 2020 Hydrogen Energy Publications LLC},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The effect of the electrostatic field on hydrogen absorption is experimentally studied for the case of AB5-type intermetallic compound LaNi4.4Al0.3Fe0.3 with low equilibrium pressure. Experimental facility contained control and measurement system for PCT-isotherms and a non-conductive polymer vessel immersed in a bath of a thermostat with transformer oil. The test sample with 100 g of the activated alloy powder was used. Electrostatic field was created between a copper tube, which simultaneously served as a hydrogen inlet, connected to a high voltage source and a grounded nickel plate rolled in the form of a cylinder around the outer wall of the vessel. The electrodes were arranged coaxially, the maximum voltage on the internal electrode was 15 kV. The high voltage source also allowed changing the polarity on the internal electrode. It was found that the electrostatic field had no effect on the already established equilibrium in the hydrogen-alloy system at a voltage at the electrode up to 15 kV, regardless of the polarity. However, the process of hydrogen absorption is noticeably slowed down when a voltage of up to 15 kV with negative polarity is applied to the internal electrode, and the effect increases with increasing voltage. At a voltage of 15 kV and the positive polarity of the internal electrode, there was no noticeable effect on the hydrogen absorption process. © 2020 Hydrogen Energy Publications LLC
2020
Blinov, D. V.; Borzenko, V. I.; Bezdudny, A. V.; Dunikov, D. O.; Kazakov, A. N.; Romanov, I. A.; Kuleshov, V. N.; Porembsky, V. I.
vol. 1683, no. 5, 2020, (cited By 0).
@conference{Blinov2020b,
title = {Metal-hydride reactor for low rate fuel supply with pressure driven adsorption and cooled by natural convection},
author = {D. V. Blinov and V. I. Borzenko and A. V. Bezdudny and D. O. Dunikov and A. N. Kazakov and I. A. Romanov and V. N. Kuleshov and V. I. Porembsky},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099562634&doi=10.1088%2f1742-6596%2f1683%2f5%2f052009&partnerID=40&md5=004799151502f035a94709a7a5cea4a2},
doi = {10.1088/1742-6596/1683/5/052009},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1683},
number = {5},
abstract = {A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.
ru D.O. Dunikov, Ddo@mail.; Borzenko, V. I.; Blinov, D. V.
Heat and mass transfer crisis in a metal hydride reactor Conference
vol. 1675, no. 1, 2020, (cited By 0).
@conference{Dunikov2020b,
title = {Heat and mass transfer crisis in a metal hydride reactor},
author = {Ddo@mail. ru D.O. Dunikov and V. I. Borzenko and D. V. Blinov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098167691&doi=10.1088%2f1742-6596%2f1675%2f1%2f012115&partnerID=40&md5=c7bdc27947a430b152e5df59e2e3ff77},
doi = {10.1088/1742-6596/1675/1/012115},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {We present a simple lumped mathematical model of hydrogen absorption in a metal hydride reactor with a constant flow rate (sub-critical regime) and use it to predict a heat and mass transfer crisis in the reactor. To verify the model we compare calculations with the experiment on hydrogen absorption in the reactor filled with 5 kg of LaNi4.8Mn0.3Fe0.1 alloy with a hydrogen flow rate of 60 stL/min. The analytical model predicts the heat and mass transfer crisis with good precision. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
We present a simple lumped mathematical model of hydrogen absorption in a metal hydride reactor with a constant flow rate (sub-critical regime) and use it to predict a heat and mass transfer crisis in the reactor. To verify the model we compare calculations with the experiment on hydrogen absorption in the reactor filled with 5 kg of LaNi4.8Mn0.3Fe0.1 alloy with a hydrogen flow rate of 60 stL/min. The analytical model predicts the heat and mass transfer crisis with good precision. © Published under licence by IOP Publishing Ltd.
Dunikov, D. O.; Borzenko, V. I.; Blinov, D. V.; Volodin, A. A.; Kazakov, A. N.; Romanov, I. A.; Bodikov, V. Y.
Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode Conference
vol. 1675, no. 1, 2020, (cited By 0).
@conference{Dunikov2020c,
title = {Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode},
author = {D. O. Dunikov and V. I. Borzenko and D. V. Blinov and A. A. Volodin and A. N. Kazakov and I. A. Romanov and V. Y. Bodikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098115658&doi=10.1088%2f1742-6596%2f1675%2f1%2f012110&partnerID=40&md5=01cf9e500b6f730bffa7bc20f1a6378b},
doi = {10.1088/1742-6596/1675/1/012110},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.
Romanov, I. A.; Borzenko, V. I.; Kazakov, A. N.
Enhancing metal hydride thermal conductivity by forming compacts Conference
vol. 1675, no. 1, 2020, (cited By 1).
@conference{Romanov2020,
title = {Enhancing metal hydride thermal conductivity by forming compacts},
author = {I. A. Romanov and V. I. Borzenko and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098187494&doi=10.1088%2f1742-6596%2f1675%2f1%2f012095&partnerID=40&md5=12db2dfb8f0cd73d9f00dbf823f49101},
doi = {10.1088/1742-6596/1675/1/012095},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {The development and implementation of metal hydride technologies face a number of challenges. One of the main problems is the low thermal conductivity of fine powders of hydride-forming materials. This feature, giving the relatively high values of the reaction heat of intermetallic compounds with hydrogen, leads to an increase in the cost of construction of vessels with metal hydrides and heat exchangers, which reduces the competitiveness of hydrogen-based technologies. One of the most promising ways to solve this problem today is the formation of compacts from metal hydride powders by pressing with additives that increase thermal conductivity. In this work, compacts based on AB5-type alloy with composition LaNi4.4Al0.3Fe0.3 prepared using various methods were studied and their properties were compared with the free bed of this alloy. Carbon nanofibers and nickel-foam were used as additives that improve the thermal conductivity of the compacts. The main methods of studying the properties of samples were measuring of hydrogen absorption and desorption PCT-isotherms and investigation of the temperature inside the samples during their heating and interaction with hydrogen. The compacts showed a noticeable improvement in thermal conductivity with a slight deterioration in hydrogen-adsorption properties, which is a promising result. © Published under licence by IOP Publishing Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The development and implementation of metal hydride technologies face a number of challenges. One of the main problems is the low thermal conductivity of fine powders of hydride-forming materials. This feature, giving the relatively high values of the reaction heat of intermetallic compounds with hydrogen, leads to an increase in the cost of construction of vessels with metal hydrides and heat exchangers, which reduces the competitiveness of hydrogen-based technologies. One of the most promising ways to solve this problem today is the formation of compacts from metal hydride powders by pressing with additives that increase thermal conductivity. In this work, compacts based on AB5-type alloy with composition LaNi4.4Al0.3Fe0.3 prepared using various methods were studied and their properties were compared with the free bed of this alloy. Carbon nanofibers and nickel-foam were used as additives that improve the thermal conductivity of the compacts. The main methods of studying the properties of samples were measuring of hydrogen absorption and desorption PCT-isotherms and investigation of the temperature inside the samples during their heating and interaction with hydrogen. The compacts showed a noticeable improvement in thermal conductivity with a slight deterioration in hydrogen-adsorption properties, which is a promising result. © Published under licence by IOP Publishing Ltd.
Romanov, I. A.; Borzenko, V. I.; Kazakov, A. N.
Use of Carbon Nano Fibers in the Production of Metal Hydride Compacts Journal Article
In: Nanotechnologies in Russia, vol. 15, no. 3-6, pp. 314-318, 2020, (cited By 1).
@article{Romanov2020314,
title = {Use of Carbon Nano Fibers in the Production of Metal Hydride Compacts},
author = {I. A. Romanov and V. I. Borzenko and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098231935&doi=10.1134%2fS1995078020030118&partnerID=40&md5=67202b1941db1320e515f3922ddeb09d},
doi = {10.1134/S1995078020030118},
year = {2020},
date = {2020-01-01},
journal = {Nanotechnologies in Russia},
volume = {15},
number = {3-6},
pages = {314-318},
abstract = {Carbon nanomaterials are being actively implemented in various energy fields, including hydrogen. One of the main problems for the development and implementation of metal hydride technologies is the low thermal conductivity of fine powders of hydride-forming materials. This feature, given the rather high values of the heat of reaction of intermetallic compounds with hydrogen, leads to an increase in the cost of the design of reactors with metal hydrides and heat exchangers, which reduces the competitiveness of hydrogen-based technologies. One of the most promising ways of solving this problem today is the formation of compacts from powders of metal hydrides with additives that increase thermal conductivity by pressing. We investigated compacts based on intermetallic compounds AB5-type composition LaNi4.4Al0.3Fe0.3 prepared using various techniques, and a comparison of their properties with the free filling of this metal hydride was carried out. Carbon nanofibers and nickel-based foam were used as additives to improve the thermal conductivity of the compacts. The main methods for studying the properties of samples were the measurement of the absorption and desorption isotherms of hydrogen in the pressure-composition-temperature coordinates and the temperature inside the samples during their heating and interaction with hydrogen. The compacts showed a noticeable improvement in thermal conductivity, with a slight deterioration in hydrogen sorption properties. © 2020, Pleiades Publishing, Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Carbon nanomaterials are being actively implemented in various energy fields, including hydrogen. One of the main problems for the development and implementation of metal hydride technologies is the low thermal conductivity of fine powders of hydride-forming materials. This feature, given the rather high values of the heat of reaction of intermetallic compounds with hydrogen, leads to an increase in the cost of the design of reactors with metal hydrides and heat exchangers, which reduces the competitiveness of hydrogen-based technologies. One of the most promising ways of solving this problem today is the formation of compacts from powders of metal hydrides with additives that increase thermal conductivity by pressing. We investigated compacts based on intermetallic compounds AB5-type composition LaNi4.4Al0.3Fe0.3 prepared using various techniques, and a comparison of their properties with the free filling of this metal hydride was carried out. Carbon nanofibers and nickel-based foam were used as additives to improve the thermal conductivity of the compacts. The main methods for studying the properties of samples were the measurement of the absorption and desorption isotherms of hydrogen in the pressure-composition-temperature coordinates and the temperature inside the samples during their heating and interaction with hydrogen. The compacts showed a noticeable improvement in thermal conductivity, with a slight deterioration in hydrogen sorption properties. © 2020, Pleiades Publishing, Ltd.
Schastlivtsev, A. I.; Borzenko, V. I.; Shmatov, D. P.
vol. 1652, no. 1, 2020, (cited By 1).
@conference{Schastlivtsev2020,
title = {Minimization of hydrogen concentration in the superheated mixture at steam turbine working fluid overheating by mixing with higherature products of hydrogen in oxygen combustion at nuclear power plant},
author = {A. I. Schastlivtsev and V. I. Borzenko and D. P. Shmatov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096659258&doi=10.1088%2f1742-6596%2f1652%2f1%2f012040&partnerID=40&md5=3ef5ac7b2a533bf8dc43467f748b35af},
doi = {10.1088/1742-6596/1652/1/012040},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1652},
number = {1},
abstract = {A new design of hydrogen-oxygen superheater with hybrid cooling of the combustion chamber with feed water and lowerature steam is proposed for smoothening the cooling process in order to reduce the residual hydrogen content in the process steam. The combustion chamber at this design consists of two parts. In the first part, external cooling with feed water is used for smooth cooling of combustion products to 1900 ... 2100 K in the most thermally stressed zone. In the second part, lowerature steam is used as coolant for external cooling, the temperature of the generated higherature steam is reduced down to 1400 ... 1500 K. Finally, the obtained higherature steam is mixed with the working fluid. © Published under licence by IOP Publishing Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
A new design of hydrogen-oxygen superheater with hybrid cooling of the combustion chamber with feed water and lowerature steam is proposed for smoothening the cooling process in order to reduce the residual hydrogen content in the process steam. The combustion chamber at this design consists of two parts. In the first part, external cooling with feed water is used for smooth cooling of combustion products to 1900 ... 2100 K in the most thermally stressed zone. In the second part, lowerature steam is used as coolant for external cooling, the temperature of the generated higherature steam is reduced down to 1400 ... 1500 K. Finally, the obtained higherature steam is mixed with the working fluid. © Published under licence by IOP Publishing Ltd.
Blinov, D. V.; Borzenko, V. I.; Bezdudny, A. V.; Dunikov, D. O.; Kazakov, A. N.; Romanov, I. A.; Kuleshov, V. N.; Porembsky, V. I.
vol. 1683, no. 5, 2020, (cited By 0).
@conference{Blinov2020,
title = {Metal-hydride reactor for low rate fuel supply with pressure driven adsorption and cooled by natural convection},
author = {D. V. Blinov and V. I. Borzenko and A. V. Bezdudny and D. O. Dunikov and A. N. Kazakov and I. A. Romanov and V. N. Kuleshov and V. I. Porembsky},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099562634&doi=10.1088%2f1742-6596%2f1683%2f5%2f052009&partnerID=40&md5=004799151502f035a94709a7a5cea4a2},
doi = {10.1088/1742-6596/1683/5/052009},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1683},
number = {5},
abstract = {A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.
Dunikov, D. O.; Borzenko, V. I.; Blinov, D. V.; Volodin, A. A.; Kazakov, A. N.; Romanov, I. A.; Bodikov, V. Y.
Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode Conference
vol. 1675, no. 1, 2020, (cited By 0).
@conference{Dunikov2020,
title = {Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode},
author = {D. O. Dunikov and V. I. Borzenko and D. V. Blinov and A. A. Volodin and A. N. Kazakov and I. A. Romanov and V. Y. Bodikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098115658&doi=10.1088%2f1742-6596%2f1675%2f1%2f012110&partnerID=40&md5=01cf9e500b6f730bffa7bc20f1a6378b},
doi = {10.1088/1742-6596/1675/1/012110},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.
Schastlivtsev, A. I.; Dunikov, D. O.; Borzenko, V. I.; Shmatov, D. P.
Hydrogen-Oxygen Installations for the Energy Industry Journal Article
In: High Temperature, vol. 58, no. 5, pp. 733-743, 2020, (cited By 1).
@article{Schastlivtsev2020733,
title = {Hydrogen-Oxygen Installations for the Energy Industry},
author = {A. I. Schastlivtsev and D. O. Dunikov and V. I. Borzenko and D. P. Shmatov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097996635&doi=10.1134%2fS0018151X20050077&partnerID=40&md5=3a09f6254d4affd427b1543d9df84f59},
doi = {10.1134/S0018151X20050077},
year = {2020},
date = {2020-01-01},
journal = {High Temperature},
volume = {58},
number = {5},
pages = {733-743},
abstract = {Abstract: The review analyzes the main types and designs of hydrogen-oxygen facilities: steam generators, superheaters, and various power air heaters. The main problems arising in the development, creation, and testing of such installations are identified. They include the cooling of the most heat-stressed units, the mixing and carburetion of the main fuel and oxidizer components, the mixing of high-temperature combustion products and ballasting components, and problems associated with the completeness of hydrogen combustion and operational safety. The main areas of these facilities application in the stationary and the energy industry are considered: maneuverability and increased efficiency in power facilities with the steam turbines, energy-storage systems with the renewable energy sources for autonomous power supply, etc. © 2020, Pleiades Publishing, Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract: The review analyzes the main types and designs of hydrogen-oxygen facilities: steam generators, superheaters, and various power air heaters. The main problems arising in the development, creation, and testing of such installations are identified. They include the cooling of the most heat-stressed units, the mixing and carburetion of the main fuel and oxidizer components, the mixing of high-temperature combustion products and ballasting components, and problems associated with the completeness of hydrogen combustion and operational safety. The main areas of these facilities application in the stationary and the energy industry are considered: maneuverability and increased efficiency in power facilities with the steam turbines, energy-storage systems with the renewable energy sources for autonomous power supply, etc. © 2020, Pleiades Publishing, Ltd.
2019
Schastlivtsev, A. I.; Borzenko, V. I.; Dunikov, D. O.
Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies Conference
2019, (cited By 0).
@conference{Schastlivtsev2019c,
title = {Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies},
author = {A. I. Schastlivtsev and V. I. Borzenko and D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067450409&doi=10.1109%2fEastonf.2019.8725412&partnerID=40&md5=14006640e2ebd8bab496b4839122b21c},
doi = {10.1109/Eastonf.2019.8725412},
year = {2019},
date = {2019-01-01},
journal = {2019 International Science and Technology Conference "EastConf", EastConf 2019},
abstract = {Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.
Tomarov, G. V.; Borzenko, V. I.; Shipkov, A. A.
In: Thermal Engineering, vol. 66, no. 10, pp. 760-768, 2019, (cited By 4).
@article{Tomarov2019760,
title = {Optimization Investigations of a Combined Binary-Cycle Geothermal Power Plant with Two Separation Pressures and Flashed Steam Superheating Using a Hydrogen–Oxygen Steam Generator},
author = {G. V. Tomarov and V. I. Borzenko and A. A. Shipkov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073361720&doi=10.1134%2fS0040601519100069&partnerID=40&md5=e90ef08421708f5f7d3c97fbee0a20ff},
doi = {10.1134/S0040601519100069},
year = {2019},
date = {2019-01-01},
journal = {Thermal Engineering},
volume = {66},
number = {10},
pages = {760-768},
abstract = {Abstract—: The article considers the specific features of and prospects for improving the efficiency of geothermal power plants (GeoPPs) that use a steam–water mixture from geothermal fields and steam superheating as an energy source. The process flow diagram of a combined binary-cycle GeoPP with two separation pressures and flashed steam superheating with the use of a hydrogen–oxygen steam generator is proposed. The advisability of using a separator downstream of the high-pressure section for decreasing the steam moisture at the turbine condenser inlet is substantiated. The article also presents the results from numerical optimization investigations of the effect that the choice of organic working fluid has on the efficiency, safety, and environmental characteristics of the binary installation used as part of a combined-cycle GeoPP. The following groups of organic substances as possible candidates for use as working fluid are considered: nontoxic, nonflammable, and nonexplosive ones (group I); low-toxic, nonflammable, and nonexplosive ones (group II); nontoxic inflammable ones (group III); and low-toxic, inflammable, and explosive ones (group IV). Typical dependences characterizing the effect that the pressure in the expander and the saturation pressure in the evaporator have on the binary turbine net power output, on the specific flowrate of separated geothermal brine per unit power capacity, on the binary cycle efficiency, and on the GeoPP efficiency as a whole are shown taking as examples the use of cyclobutane and octafluoropropane as a working fluid. For a few working fluids, the existence of extremes in the above-mentioned dependences is established, which determine the binary installation optimal power values and the minimal geothermal brine specific flowrate. Based on the numerical analysis results, limitations are imposed on the admissible maximum and minimum pressure values in the binary circuit. Bar charts of calculated process characteristics influencing the binary turbine flow path’s design and efficiency are plotted. A priority (according to the maximum net power output criterion) list of working fluids relating to the group of environmentally friendly organic substances for the combined-cycle GeoPP binary installation with flashed steam superheating taking into account process-related limitations is drawn up. © 2019, Pleiades Publishing, Inc.},
note = {cited By 4},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract—: The article considers the specific features of and prospects for improving the efficiency of geothermal power plants (GeoPPs) that use a steam–water mixture from geothermal fields and steam superheating as an energy source. The process flow diagram of a combined binary-cycle GeoPP with two separation pressures and flashed steam superheating with the use of a hydrogen–oxygen steam generator is proposed. The advisability of using a separator downstream of the high-pressure section for decreasing the steam moisture at the turbine condenser inlet is substantiated. The article also presents the results from numerical optimization investigations of the effect that the choice of organic working fluid has on the efficiency, safety, and environmental characteristics of the binary installation used as part of a combined-cycle GeoPP. The following groups of organic substances as possible candidates for use as working fluid are considered: nontoxic, nonflammable, and nonexplosive ones (group I); low-toxic, nonflammable, and nonexplosive ones (group II); nontoxic inflammable ones (group III); and low-toxic, inflammable, and explosive ones (group IV). Typical dependences characterizing the effect that the pressure in the expander and the saturation pressure in the evaporator have on the binary turbine net power output, on the specific flowrate of separated geothermal brine per unit power capacity, on the binary cycle efficiency, and on the GeoPP efficiency as a whole are shown taking as examples the use of cyclobutane and octafluoropropane as a working fluid. For a few working fluids, the existence of extremes in the above-mentioned dependences is established, which determine the binary installation optimal power values and the minimal geothermal brine specific flowrate. Based on the numerical analysis results, limitations are imposed on the admissible maximum and minimum pressure values in the binary circuit. Bar charts of calculated process characteristics influencing the binary turbine flow path’s design and efficiency are plotted. A priority (according to the maximum net power output criterion) list of working fluids relating to the group of environmentally friendly organic substances for the combined-cycle GeoPP binary installation with flashed steam superheating taking into account process-related limitations is drawn up. © 2019, Pleiades Publishing, Inc.
Romanov, I. A.; Borzenko, V. I.; Kazakov, A. N.
vol. 1359, no. 1, 2019, (cited By 2).
@conference{Romanov2019,
title = {Using the copper-foam for thermal conductivity improvement of La0.9Ce0.1Ni5-alloy bed during interaction with hydrogen},
author = {I. A. Romanov and V. I. Borzenko and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076493166&doi=10.1088%2f1742-6596%2f1359%2f1%2f012103&partnerID=40&md5=c919c9eaea4874d6ef6ab861a2b81a8e},
doi = {10.1088/1742-6596/1359/1/012103},
year = {2019},
date = {2019-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1359},
number = {1},
abstract = {One of the main obstacles to the development of hydrogen energy is the problem of heat transfer inside metal hydride beds. Thus, the problem of increasing the metal hydride beds thermal conductivity is of great interest. This study is devoted to the investigation of the hydrogen sorption properties of an intermetallic compound placed in a matrix of foam material. Copper-foam with mass of 8 g was chosen as a matrix for 50 g of powder of activated AB5-type alloy with composition of La0.9Ce0.1Ni5. PCT-isotherms of hydrogen absorption and desorption were measured at temperatures 313, 333 and 353 K. Also, the dynamics of temperature change in the sample was studied when it was heated under vacuum conditions. The obtained data were compared with the results of previous studies conducted under the same conditions for samples of pure alloy and a mixture of alloy with copper powder. It has been concluded that the use of copper-foam to improve the thermal conductivity is promising, but it is necessary to take into account its influence on the hydrogen sorption properties of metal hydrides. © Published under licence by IOP Publishing Ltd.},
note = {cited By 2},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
One of the main obstacles to the development of hydrogen energy is the problem of heat transfer inside metal hydride beds. Thus, the problem of increasing the metal hydride beds thermal conductivity is of great interest. This study is devoted to the investigation of the hydrogen sorption properties of an intermetallic compound placed in a matrix of foam material. Copper-foam with mass of 8 g was chosen as a matrix for 50 g of powder of activated AB5-type alloy with composition of La0.9Ce0.1Ni5. PCT-isotherms of hydrogen absorption and desorption were measured at temperatures 313, 333 and 353 K. Also, the dynamics of temperature change in the sample was studied when it was heated under vacuum conditions. The obtained data were compared with the results of previous studies conducted under the same conditions for samples of pure alloy and a mixture of alloy with copper powder. It has been concluded that the use of copper-foam to improve the thermal conductivity is promising, but it is necessary to take into account its influence on the hydrogen sorption properties of metal hydrides. © Published under licence by IOP Publishing Ltd.
Schastlivtsev, A. I.; Borzenko, V. I.; Dunikov, D. O.
Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies Conference
vol. 1370, no. 1, 2019, (cited By 0).
@conference{Schastlivtsev2019,
title = {Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies},
author = {A. I. Schastlivtsev and V. I. Borzenko and D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067450409&doi=10.1109%2fEastonf.2019.8725412&partnerID=40&md5=14006640e2ebd8bab496b4839122b21c},
doi = {10.1109/Eastonf.2019.8725412},
year = {2019},
date = {2019-01-01},
journal = {2019 International Science and Technology Conference "EastConf", EastConf 2019},
volume = {1370},
number = {1},
abstract = {Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.
Borzenko, V. I.; Romanov, I. A.; Dunikov, D. O.; Kazakov, A. N.
Hydrogen sorption properties of metal hydride beds: Effect of internal stresses caused by reactor geometry Journal Article
In: International Journal of Hydrogen Energy, vol. 44, no. 12, pp. 6086-6092, 2019, (cited By 13).
@article{Borzenko20196086,
title = {Hydrogen sorption properties of metal hydride beds: Effect of internal stresses caused by reactor geometry},
author = {V. I. Borzenko and I. A. Romanov and D. O. Dunikov and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060769034&doi=10.1016%2fj.ijhydene.2019.01.052&partnerID=40&md5=27c6ea1d651918ce4dcc14dbdc83df8a},
doi = {10.1016/j.ijhydene.2019.01.052},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {44},
number = {12},
pages = {6086-6092},
abstract = {A number of peculiarities in sorption behavior of metal hydride beds depending on the reactor geometry have been discovered. Comparison of PCT absorption and desorption isotherms was conducted for the same 500 g sample of La 0·9 Ce 0·1 Ni 5 -alloy and two different geometries: horizontal half-cylinder and vertical annular. This approach gives the way to directly investigate the influence of the bed geometry on the hydrogen sorption properties excluding the effect of other factors. The influence of the internal stresses in the fine dispersed beds of intermetallic compounds on their sorption properties is discussed in the present study. The occurrence of internal stresses in the vertical annular metal hydride bed results in the decrease of the hydrogen equilibrium pressure, increase of the enthalpy and entropy of hydrogen absorption and decrease of pressure hysteresis due to significantly stronger decrease of absorption pressure compared to desorption. The analysis of SEM images of the sample taken from the bottom of the working autoclave showed the presence of a macro particle which avoided the dispersion due to the agglomerated particles around. © 2019 Hydrogen Energy Publications LLC},
note = {cited By 13},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A number of peculiarities in sorption behavior of metal hydride beds depending on the reactor geometry have been discovered. Comparison of PCT absorption and desorption isotherms was conducted for the same 500 g sample of La 0·9 Ce 0·1 Ni 5 -alloy and two different geometries: horizontal half-cylinder and vertical annular. This approach gives the way to directly investigate the influence of the bed geometry on the hydrogen sorption properties excluding the effect of other factors. The influence of the internal stresses in the fine dispersed beds of intermetallic compounds on their sorption properties is discussed in the present study. The occurrence of internal stresses in the vertical annular metal hydride bed results in the decrease of the hydrogen equilibrium pressure, increase of the enthalpy and entropy of hydrogen absorption and decrease of pressure hysteresis due to significantly stronger decrease of absorption pressure compared to desorption. The analysis of SEM images of the sample taken from the bottom of the working autoclave showed the presence of a macro particle which avoided the dispersion due to the agglomerated particles around. © 2019 Hydrogen Energy Publications LLC
Khayrullina, A. G.; Blinov, D.; Borzenko, V.
Novel kW scale hydrogen energy storage system utilizing fuel cell exhaust air for hydrogen desorption process from metal hydride reactor Journal Article
In: Energy, vol. 183, pp. 1244-1252, 2019, (cited By 14).
@article{Khayrullina20191244,
title = {Novel kW scale hydrogen energy storage system utilizing fuel cell exhaust air for hydrogen desorption process from metal hydride reactor},
author = {A. G. Khayrullina and D. Blinov and V. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85068554494&doi=10.1016%2fj.energy.2019.07.021&partnerID=40&md5=a64feac4bcc7dc403e69c29fb52636ce},
doi = {10.1016/j.energy.2019.07.021},
year = {2019},
date = {2019-01-01},
journal = {Energy},
volume = {183},
pages = {1244-1252},
abstract = {In the narrative of changing energy production environment, renewable sources of energy provide a fundamental basis for the growth of energy storage technologies. In particular, many settlements in Russia and other countries are located outside the centralized grids. With the goal of replacing diesel engines, a pilot project with solar panels produced 30 000 kWh. However, a support of energy storage systems is needed to ensure higher replacement percentage. The present paper introduces the development of a novel kW-scale power production unit that utilizes metal-hydride (MH) energy storage and 1 kW PEM fuel cell (FC). In the effort to enable the technology for autonomous applications, the novel concept of using FC exhaust air for hydrogen desorption process replacing an external heating agent was successfully proved. In the first two experiments, the limitations of the initial stage of the MH reactor were formulated. Warming up speed of the MH reactor was not sufficient to support the necessary hydrogen pressure level output. Third and fourth experiments provide possible solutions to this limitation: (i) higher load on the FC enable satisfactory warm-up speed of the MH reactor, (ii) higher initial pressure of MH reactor charge mitigates an initial pressure drop during the FC startup procedures. © 2019 Elsevier Ltd},
note = {cited By 14},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In the narrative of changing energy production environment, renewable sources of energy provide a fundamental basis for the growth of energy storage technologies. In particular, many settlements in Russia and other countries are located outside the centralized grids. With the goal of replacing diesel engines, a pilot project with solar panels produced 30 000 kWh. However, a support of energy storage systems is needed to ensure higher replacement percentage. The present paper introduces the development of a novel kW-scale power production unit that utilizes metal-hydride (MH) energy storage and 1 kW PEM fuel cell (FC). In the effort to enable the technology for autonomous applications, the novel concept of using FC exhaust air for hydrogen desorption process replacing an external heating agent was successfully proved. In the first two experiments, the limitations of the initial stage of the MH reactor were formulated. Warming up speed of the MH reactor was not sufficient to support the necessary hydrogen pressure level output. Third and fourth experiments provide possible solutions to this limitation: (i) higher load on the FC enable satisfactory warm-up speed of the MH reactor, (ii) higher initial pressure of MH reactor charge mitigates an initial pressure drop during the FC startup procedures. © 2019 Elsevier Ltd
Khayrullina, A.; Blinov, D.; Borzenko, V.
Air heated metal hydride energy storage system design and experiments for microgrid applications Journal Article
In: International Journal of Hydrogen Energy, pp. 19168-19176, 2019, (cited By 8).
@article{Khayrullina201919168,
title = {Air heated metal hydride energy storage system design and experiments for microgrid applications},
author = {A. Khayrullina and D. Blinov and V. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85049092898&doi=10.1016%2fj.ijhydene.2018.05.145&partnerID=40&md5=36a54cfc658c4e3084262482a35b6c93},
doi = {10.1016/j.ijhydene.2018.05.145},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Hydrogen Energy},
pages = {19168-19176},
abstract = {Emerging technologies of the 21st Century introduced bi-directional flows between a big number of uncontrollable and unpredictable generators together with a need for energy storage (ES) capable of solving instability issues. With the aim of developing new control methodologies, Skoltech developed a Smart Grid laboratory that includes a variety of energy generators, and storage systems. The capabilities of the grid were expanded with a metal hydride (MH) ES and 1 kW fuel cell. MH ES performs at the near ambient temperatures and relatively low pressure, it has adjustable properties, satisfactory gravimetric H2 density, and a simple thermal management. However, existing technologies require an external heat source, which cannot serve the purpose of autonomous microgrid applications. The aim of this research was to develop and test an air heated metal hydride energy storage system that utilizes the internal waste heat of the system. Based on low power MH ES system experiments [1] and waste heat investigations [2], an air heated system with 1 m3 H2 MH reactor was developed and tested. The experiments were performed in the system that also includes 1 kW fuel cell and an electrolyzer. Obtained results show higher efficiency rate of the system due to waste heat utilization from the air-cooled polymer electrolyte membrane (PEM) FC, ensure mobility for autonomous applications, and open the opportunity for further research in the field of power system control. © 2018 Hydrogen Energy Publications LLC},
note = {cited By 8},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Emerging technologies of the 21st Century introduced bi-directional flows between a big number of uncontrollable and unpredictable generators together with a need for energy storage (ES) capable of solving instability issues. With the aim of developing new control methodologies, Skoltech developed a Smart Grid laboratory that includes a variety of energy generators, and storage systems. The capabilities of the grid were expanded with a metal hydride (MH) ES and 1 kW fuel cell. MH ES performs at the near ambient temperatures and relatively low pressure, it has adjustable properties, satisfactory gravimetric H2 density, and a simple thermal management. However, existing technologies require an external heat source, which cannot serve the purpose of autonomous microgrid applications. The aim of this research was to develop and test an air heated metal hydride energy storage system that utilizes the internal waste heat of the system. Based on low power MH ES system experiments [1] and waste heat investigations [2], an air heated system with 1 m3 H2 MH reactor was developed and tested. The experiments were performed in the system that also includes 1 kW fuel cell and an electrolyzer. Obtained results show higher efficiency rate of the system due to waste heat utilization from the air-cooled polymer electrolyte membrane (PEM) FC, ensure mobility for autonomous applications, and open the opportunity for further research in the field of power system control. © 2018 Hydrogen Energy Publications LLC
Blinov, D.; Borzenko, V.; Glagoleva, A.; Kazakov, A.
vol. 114, 2019, (cited By 0).
@conference{Blinov2019,
title = {Integration of metal hydride devices with polymer electrolyte fuel cells and electrolyzers for stationary applications},
author = {D. Blinov and V. Borzenko and A. Glagoleva and A. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072568458&doi=10.1051%2fe3sconf%2f201911406008&partnerID=40&md5=14ab46c313519dfb06c4d273557f7d56},
doi = {10.1051/e3sconf/201911406008},
year = {2019},
date = {2019-01-01},
journal = {E3S Web of Conferences},
volume = {114},
abstract = {This paper presents the experimental results of the system integration of a fuel cell (FC), an electrolyzer and a metal hydride hydrogen storage and purification system. A pilot scale experimental power installation H2Smart with an electric power of 1 kW is developed, and the results of its operation in different regimes are presented. The problems of hydrogen desorption for the supply of FC and hydrogen sorption from the electrolyzer at the start are shown. Possible solutions of this problem are proposed. © The Authors, published by EDP Sciences.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
This paper presents the experimental results of the system integration of a fuel cell (FC), an electrolyzer and a metal hydride hydrogen storage and purification system. A pilot scale experimental power installation H2Smart with an electric power of 1 kW is developed, and the results of its operation in different regimes are presented. The problems of hydrogen desorption for the supply of FC and hydrogen sorption from the electrolyzer at the start are shown. Possible solutions of this problem are proposed. © The Authors, published by EDP Sciences.
Kazakov, A.; Blinov, D.; Romanov, I.; Dunikov, D.; Borzenko, V.
Metal hydride technologies for renewable energy Conference
vol. 114, 2019, (cited By 5).
@conference{Kazakov2019,
title = {Metal hydride technologies for renewable energy},
author = {A. Kazakov and D. Blinov and I. Romanov and D. Dunikov and V. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072568300&doi=10.1051%2fe3sconf%2f201911405005&partnerID=40&md5=d56031633a9aa4a50d5d9c9e3612727f},
doi = {10.1051/e3sconf/201911405005},
year = {2019},
date = {2019-01-01},
journal = {E3S Web of Conferences},
volume = {114},
abstract = {Significant progress in the installation of renewable energy requires the improvement of energy production and storage technologies. Hydrogen energy storage systems based on reversible metal hydride materials can be used as an energy backup system. Metal hydride hydrogen storage systems are distinguished by a high degree of safety of their use, since hydrogen is stored in a solid phase, a high volumetric density of stored hydrogen, and the possibility of long-term storage without losses. A distinctive feature of metal hydride materials is the reversible and selective absorption and release of high-purity hydrogen. This paper presents experimental studies of LaNi5-based metal hydride materials with a useful hydrogen capacity of 1.0–1.3 wt.% H2 with equilibrium pressures of 0.025 - 0.05 MPa and 0.1 - 1.2 MPa at moderate temperatures of 295 - 353 K for the hydrogen purification systems and hydrogen long-term storage systems, respectively. The applicability of metal hydride technologies for renewable energy sources as energy storage systems in the form of hydrogen is also shown. © The Authors, published by EDP Sciences.},
note = {cited By 5},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Significant progress in the installation of renewable energy requires the improvement of energy production and storage technologies. Hydrogen energy storage systems based on reversible metal hydride materials can be used as an energy backup system. Metal hydride hydrogen storage systems are distinguished by a high degree of safety of their use, since hydrogen is stored in a solid phase, a high volumetric density of stored hydrogen, and the possibility of long-term storage without losses. A distinctive feature of metal hydride materials is the reversible and selective absorption and release of high-purity hydrogen. This paper presents experimental studies of LaNi5-based metal hydride materials with a useful hydrogen capacity of 1.0–1.3 wt.% H2 with equilibrium pressures of 0.025 - 0.05 MPa and 0.1 - 1.2 MPa at moderate temperatures of 295 - 353 K for the hydrogen purification systems and hydrogen long-term storage systems, respectively. The applicability of metal hydride technologies for renewable energy sources as energy storage systems in the form of hydrogen is also shown. © The Authors, published by EDP Sciences.
Schastlivtsev, A.; Dunikov, D.; Borzenko, V.
Experimental study of the processes in hydrogen-oxygen gas generator Journal Article
In: International Journal of Hydrogen Energy, vol. 44, no. 18, pp. 9450-9455, 2019, (cited By 9).
@article{Schastlivtsev20199450,
title = {Experimental study of the processes in hydrogen-oxygen gas generator},
author = {A. Schastlivtsev and D. Dunikov and V. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062636252&doi=10.1016%2fj.ijhydene.2019.02.126&partnerID=40&md5=f90ef441c2d5d3f4af26c64f457ef9c7},
doi = {10.1016/j.ijhydene.2019.02.126},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {44},
number = {18},
pages = {9450-9455},
abstract = {The paper presents a hydrogen-oxygen gas generator, which could be a key element of a novel scheme of hybrid hydrogen-air energy storage system, which proposes to store energy in both compressed air and hydrogen. At a power generation mode, hydrogen is combusted in oxygen, the produced steam is mixed with air and the gas mixture is used in a conventional gas turbine. The experimental hydrogen-oxygen gas generator has produced gas with temperatures 953–1163 K at pressures 2–4 MPa and has reached the thermal capacity up to 210 kW and thermal efficiency up to 95–99%. Separation of the combustion zone and air injection has helped to reduce NOx content in the product gas to 11 mg/st.m3. © 2019 Hydrogen Energy Publications LLC},
note = {cited By 9},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The paper presents a hydrogen-oxygen gas generator, which could be a key element of a novel scheme of hybrid hydrogen-air energy storage system, which proposes to store energy in both compressed air and hydrogen. At a power generation mode, hydrogen is combusted in oxygen, the produced steam is mixed with air and the gas mixture is used in a conventional gas turbine. The experimental hydrogen-oxygen gas generator has produced gas with temperatures 953–1163 K at pressures 2–4 MPa and has reached the thermal capacity up to 210 kW and thermal efficiency up to 95–99%. Separation of the combustion zone and air injection has helped to reduce NOx content in the product gas to 11 mg/st.m3. © 2019 Hydrogen Energy Publications LLC