跨临界CO_(2)液态储能系统关键参数及火用分析  

Critical Parameters and Exergic Analysis of Transcritical CO 2 Liquid Energy Storage System

作　　者：陈名扬 王洪利 CHEN Ming-yang;WANGHong-li(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan Hebei 063210,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《华北理工大学学报（自然科学版）》2024年第3期70-77,共8页Journal of North China University of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金"废旧锂离子电池中的有价金属在熔盐提取过程中的电化学行为"(51774143);唐山市科技创新团队培养计划项目(21130207D)。

摘　　要：基于热力学第一、二定律,建立了跨临界CO_(2)液态储能系统数学模型,分析了压缩机入口CO_(2)压力、储罐压力及压缩机前CO_(2)入口温度等参数对系统性能的影响。参数分析表明:提高压差有利于系统循环效率的提升,压缩机和冷却水的入口温度对系统的性能影响均存在最优的温度区间。火用分析结果显示:蓄冷器由于存在相变发生,火用损失最高,其次是机械部件和换热器,其中对机械部件改进可以有效提高系统的性能。Based on the first and second laws of thermodynamics,a mathematical model of the trans-critical CO_(2) liquid energy storage system was established,and the effects of CO_(2) pressure at compressor inlet,tank pressure and CO_(2) inlet temperature before compressor on the system performance were analyzed.Parameter analysis shows that the improvement of pressure difference is conducive to the improvement of system circulation efficiency,and the influence of compressor and cooling water inlet temperature on system performance has an optimal temperature range.Exergic analysis shows that the exergic loss is the highest due to a phase change in the coolers,followed by mechanical parts and heat exchangers,of which improvement of mechanical parts can effectively improve the performance of the system.

关 键 词：液态存储 压缩CO_(2)储能 参数分析 火用分析 

分 类 号：TK02[动力工程及工程热物理]