期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 38, 页码 19846-19860出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.03.137
关键词
Hydrogen-rich fuel; Solar thermochemistry; Solid oxide fuel cell; Distributed energy system
资金
- National Key Research and Development Program of China [2018YFB0905102]
- National Natural Science Foundation of China [52090061]
- Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foundation of China [51888103]
This paper proposes a new solar thermochemical hydrogen production technology that combines mid-and-low temperature solar thermochemistry with solid oxide fuel cells, achieving a multifunctional distributed energy system that promotes cascade utilization of energy. Numerical simulation results show promising efficiency and energy performance of the system.
Solar thermochemical hydrogen production with energy level upgraded from solar thermal to chemical energy shows great potential. By integrating mid-and-low temperature solar thermochemistry and solid oxide fuel cells, in this paper, a new distributed energy system combining power, cooling, and heating is proposed and analyzed from thermodynamic, energy and exergy viewpoints. Different from the high temperature solar thermochemistry (above 1073.15 K), the mid-and-low temperature solar thermochemistry utilizes concen-trated solar thermal (473.15-573.15 K) to drive methanol decomposition reaction, reducing irreversible heat collection loss. The produced hydrogen-rich fuel is converted into power through solid oxide fuel cells and micro gas turbines successively, realizing the cascaded utilization of fuel and solar energy. Numerical simulation is conducted to investigate the system thermodynamic performances under design and off-design conditions. Promising results reveal that solar-to-hydrogen and net solar-to-electricity efficiencies reach 66.26% and 40.93%, respectively. With the solar thermochemical conversion and hydrogen-rich fuel cascade utilization, the system exergy and overall energy efficiencies reach 59.76% and 80.74%, respectively. This research may provide a pathway for efficient hydrogen-rich fuel production and power generation. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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