热力发电2025，Vol.54Issue(12)：19-26,8.DOI:10.19666/j.rlfd.202506115
级联热泵驱动的超临界有机朗肯循环卡诺电池特性研究
Characteristics of cascaded heat pump driven supercritical organic Rankine Carnot battery
摘要
Abstract
Carnot battery(CB)is an energy storage technology with the advantages of high energy storage density and low investment cost.The single-stage heat pump of basic Carnot battery have a low coefficient of performance(COP)under high energy storage density conditions,resulting in a phenomenon of high quality but low utilization of heat.In order to solve this problem,a CB using cascaded heat pump(CHP)and supercritical organic Rankine cycle(ORC)is proposed.Through modeling and analysis,the optimal combination of CHP-CB working fluids is obtained,and the effects of waste heat source temperature,high and low temperature heat storage tank temperature,CHP intermediate temperature on system COP,energy conversion efficiency,energy storage density(ED)and system exergy loss are discussed.The results show that under high energy density conditions,the COP of the CHP-CB is about 23.5%and 26.9%higher than that of the basic CB when the temperature of the low-temperature storage tank is 50℃and 32℃,respeetively.When the temperature of the low-temperature storage tank is 30℃,the energy conversion efficiency of the CHP-CB can reach 63.11%.The ED can reach 13.9 kW·h/m3 when the temperature difference between the high-and low-temperature storage tank is 93℃,and cascade heating for the heat storage working fluid can be realized.关键词
级联热泵/超临界有机朗肯循环/储能密度/卡诺电池Key words
cascaded heat pumps/supercritical organic Rankine cycle/energy storage density/Carnot battery引用本文复制引用
HAN Dongchen,SUN Enhui,XU Fangning,ZHANG Weiqi..级联热泵驱动的超临界有机朗肯循环卡诺电池特性研究[J].热力发电,2025,54(12):19-26,8.基金项目
国家自然科学基金项目(52206010)National Natural Science Foundation of China(52206010) （52206010）
