热力发电2024，Vol.53Issue(12)：10-20,11.DOI:10.19666/j.rlfd.202405131
质子交换膜电解槽与燃煤电站耦合的技术经济性分析
Techno-economic analysis of coal-fired power plant integrated with proton exchange membrane electrolyzer
摘要
Abstract
The proton exchange membrane(PEM)electrolyzer can convert green electricity into hydrogen energy,but the conversion efficiency of PEM electrolyzer is low,the thermal energy in the electrolyzer outlet water is not fully utilized.To fully use the waste heat in the PEM electrolyzer hydrogen production system,integrated systems incorporating a 660 MW coal-fired unit and PEM electrolyzer are proposed in both power generation(PG)and combined heat and power(CHP)scenarios.EBSILON and MATLAB Simulink softwares are applied for modelling,and thermodynamic and economic analysis is conducted.In PG scenario,the electrolyzer outlet water is used to heat the feedwater of coal-fired unit.While for CHP scenario,the electrolyzer outlet water is used to heat the return water from heating supply network along with the extraction steam.The produced oxygen is sent into the boiler for combustion.The results show that,compared with the reference coal-fired unit,in PG scenario,the power output is enhanced by 2.55 MW with an power supply efficiency rise of 0.17%,and the boiler efficiency increases by 0.04%.While in CHP scenario,the power output can be enhanced by 5.83 MW with an efficiency rise of 0.40%.After attributing the net power output increment to the PEM hydrogen production system,the exergy efficiency of the PEM hydrogen production system is 69.74%in PG mode with an increase of 3.44%,and 75.41%in CHP mode with an increase of 9.11%.For these two scenarios,the system exergy efficiencies reach up to 40.20%and 40.18%.Economic analysis shows that,the annual income growth by selling electricity for PG and CHP scenarios are 5 460 000 yuan and 12 460 000 yuan,with the increments of net present value of 61 320 000 yuan and 140 140 000 yuan,respectively.The levelized cost of hydrogen production in the reference system is 42.72 yuan/kg.The levelized cost of hydrogen production in PG and CHP modes in the integrated system is 42.55 yuan/kg and 40.79 yuan/kg,respectively.关键词
质子交换膜电解槽/燃煤电站/制氢/技术经济性分析Key words
proton exchange membrane electrolyzer/coal-fired power station/hydrogen production/techno-economic analysis引用本文复制引用
陈志董,张菁,詹宏伟,孔艳强,杨立军,杜小泽..质子交换膜电解槽与燃煤电站耦合的技术经济性分析[J].热力发电,2024,53(12):10-20,11.基金项目
国家自然科学基金项目(52276062,52076076)National Natural Science Foundation of China(52276062,52076076) （52276062,52076076）
