热力发电2024，Vol.53Issue(9)：78-84,7.DOI:10.19666/j.rlfd.202406125
耦合液态乙烯冷能的液态空气储能系统热力学及经济性分析
Thermodynamic and economic analysis for a liquid air energy storage system coupling cold energy of liquefied ethylene
摘要
Abstract
Liquid air energy storage(LAES)technology stands out as a large-scale energy storage technology due to its superior energy storage density and adaptability to external energy sources.An LAES system that recovers waste cold of liquid ethylene and introduces an external low-temperature heat source is proposed.Moreover,thermodynamical and economic analysis on key parameters,including isentropic efficiency of the compressor and expander,and temperature of the heat source,are conducted.The results reveal that,when the ethylene flow rate is 34 t/h,the energy storage capacity can reach up to 5 MW/40(MW·h).At isentropic efficiency of the compressor and expander of 90%,the round-trip efficiency can achieve 77.45%by solely relying on an ambient heat source of 25℃for air heating.When the heat source temperature is increased to 125 ℃,the system's optimal round-trip efficiency,net present value,and dynamic payback period reaches 106.99%,144.73 million yuan,and 3.56 years,respectively.These findings provide reference for research on the coupling of LAES systems with external cold energy.关键词
液态空气储能/液态乙烯/冷能回收Key words
liquid air energy storage/liquefied ethylene/cold energy recovery引用本文复制引用
李宜洪,刘纪云,李保坤,高诏诏,陈六彪,王俊杰..耦合液态乙烯冷能的液态空气储能系统热力学及经济性分析[J].热力发电,2024,53(9):78-84,7.基金项目
国家资助博士后研究人员计划(GZC20241778) （GZC20241778）
中国绿发科技创新项目(202309CHDD020) Postdoctoral Fellowship Program of CPSF(GZC20241778) （202309CHDD020）
Technological Innovation Projects of China Green Development Investment Group Co.,Ltd.(202309CHDD020) （202309CHDD020）
