Journal
ENERGY
Volume 192, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2019.116613
Keywords
SOFC; PEMFC; Thermo-economic modeling; Metal hydride; Electricity power generation
Categories
Funding
- National Natural Science Foundation of China [21736008]
- Hong Kong Scholar Program [XJ2017023]
- CAS Pioneer Hundred Talents Program
- USTC
- Hong Kong Polytechnic University (G-YBJN)
- Research Grant Council, University Grants Committee, Hong Kong SAR [PolyU 152214/17E]
- Hong Kong Polytechnic University (G-YW2D)
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The natural gas fueled system coupling solid oxide fuel cell, water gas shift reaction, thermal swing adsorption and proton exchange membrane fuel cell (SOFC-WGS-TSA-PEMFC) could have a high efficiency and fast response for power generation. The thermo-economic analyses show that the hybrid system could have a better economy for electricity generation, whose specific electricity cost with LaNi5 as the thermal swing adsorption (TSA) working medium is 4.058 cent/kW h only, remarkably lower than that of a standard power plant (5.46 cent/kW h). The sensitivity analysis indicates the low sensitivity of the system to the market price fluctuation. When using the Mg+2 wt%Ni or TiFe metal hydride with the higher hydrogen capacity and the cheaper price as the TSA working medium for H-2 production, the specific electricity energy cost can be further reduced to 3.958 cent/kW h, which could be more economical than that with the traditional pressure swing adsorption or the membrane reactor for H-2 production. In addition, the large-scale electricity power generation helps to cut down the system specific cost. These results reveal that the hybrid system could be a promising and economical energy conversion system for stationary electricity power generation. (C) 2019 Elsevier Ltd. All rights reserved.
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