吸收式制冷压缩CO_(2)储能系统性能分析  

Performance Analysis of CO_(2) Energy Storage System with Absorption Refrigeration Cycle

作　　者：刘希锴 王鼎 刘仕桢 张荻[1] LIU Xikai;WANG Ding;LIU Shizhen;ZHANG Di(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《动力工程学报》2024年第3期361-368,共8页Journal of Chinese Society of Power Engineering

基　　金：陕西省重点研发计划高校联合资助项目(2022GXLH-01-17);中央高校基本科研业务费专项资金资助项目(xtr072021002)。

摘　　要：提出了一种结合了吸收式制冷循环的压缩CO_(2)储能系统,该系统采用分流的方式,将一部分CO_(2)引流至二级压缩机,将压缩产生的热量提供给吸收式制冷循环,使其启动工作并提供冷量给主路CO_(2),同时使用高压罐储存液态CO_(2),从而提高系统的储能效率。此外,对该系统进行了热力学分析和多目标优化。结果表明:在设计工况下,吸收器、一级压缩机、透平和级后换热器的[火用]损较大;本系统的储能效率随着冷凝压力、压缩机等熵效率和透平等熵效率的增加而提高,而储能压力的增大会使系统的储能效率降低;系统的最佳储能效率为68.70%,能量密度为0.153 kW·h/m^(3)。A CO_(2) energy storage system with absorption refrigeration cycle was proposed,which adopted a split flow method to divert a portion of CO_(2) to the secondary compressor,the heat generated by the secondary compression was provided to the absorption refrigeration cycle,which provided cooling capacity for the main CO_(2) in system,and used the high-pressure storage tank to store CO_(2) in the liquid state,to improve the system energy storage efficiency.Thermodynamic analysis and multi-objective optimization of the system were carried out.Results show that the absorber,first stage compressor,turbine and post stage heat exchanger have relatively high exergy destruction under design condition.The system energy storage efficiency increases with the increase of condensation pressure,the adiabatic efficiency of compressor and turbine.However,the system energy storage efficiency decreases with the increase of the storage pressure.The optimal energy storage efficiency and energy density of the system are 68.70%and 0.153 kW·h/m^(3),respectively.

关 键 词：压缩CO_(2)储能 吸收式制冷循环 储能效率 储能密度 

分 类 号：TK02[动力工程及工程热物理]