New Hybrid CHP System Integrating Solar Energy and Exhaust Heat Thermochemical Synergistic Conversion with Dual-Source Energy Storage  

作　　者：QIN Yuanlong LIU Taixiu LI Peijing ZHAO Kai JIAO Fan PEI Gang LIU Qibin 

机构地区：[1]Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei,230027,China [2]Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,100190,China [3]University of Chinese Academy of Sciences,Beijing,100049,China [4]School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing,102206,China

出　　处：《Journal of Thermal Science》2024年第3期970-984,共15页热科学学报（英文版）

基　　金：financially supported by the Distinguish Young Scholars of the National Natural Science Foundation of China(No.52225601);the National Natural Science Foundation of China(Grant No.52006214)。

摘　　要：For the efficient use of solar and fuels and to improve the supply-demand matching performance in combined heat and power(CHP)systems,this paper proposes a hybrid solar/methanol energy system integrating solar/exhaust thermochemical and thermal energy storage.The proposed system includes parabolic trough solar collectors(PTSC),a thermochemical reactor,an internal combustion engine(ICE),and hybrid storage of thermal and chemical energy,which uses solar energy and methanol fuel as input and outputs power and heat.With methanol thermochemical decomposition reaction,mid-and-low temperature solar heat and exhaust heat are upgraded to chemical energy for efficient power generation.The thermal energy storage(TES)stores surplus thermal energy,acting as a backup source to produce heat without emitting CO_(2).Due to the energy storage,time-varying solar energy can be used steadily and efficiently;considerable supply-demand mismatches can be avoided,and the operational flexibility is improved.Under the design condition,the overall energy efficiency,exergy efficiency,and net solar-to-electric efficiency achieve 72.09%,37.65%,and 24.63%,respectively.The fuel saving rate(FSR)and the CO_(2) emission reduction(ER_(CO_(2)))achieve 32.97%and 25.33%,respectively.The research findings provide a promising approach for the efficient and flexible use of solar energy and fuels for combined heat and power.

关 键 词：hybrid energy system solar thermochemical exhaust heat energy storage operational flexibility 

分 类 号：TM61[电气工程—电力系统及自动化]