蒸汽驱动的CaCl_(2)吸收式热泵储热系统热力学性能研究  

Thermodynamic Performance Study of CaCl_(2) Absorption Heat Pump Heat Storage System

作　　者：陈金森 刘继平[1] 赵永亮 张蓝洁 张顺奇 严俊杰[2] CHEN Jinsen;LIU Jiping;ZHAO Yongliang;ZHANG Lanjie;ZHANG Shunqi;YAN Junjie(Key Laboratory of Heat Flow Science and Engineering of Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,西安710049 [2]西安交通大学动力工程多相流国家重点实验室,西安7710049

出　　处：《工程热物理学报》2023年第11期3069-3075,共7页Journal of Engineering Thermophysics

基　　金：国家重点研发计划项目(No.2022YFB4100804);国家自然科学基金资助项目(No.52206022)。

摘　　要：储热技术是实现燃煤热电联产机组深度调峰的有效措施之一。本文提出了一种采用CaCl_(2)-H_(2)O工质对的吸收式热泵储热系统,CaCl_(2)-H_(2)O溶液作为储热介质,利用浓度差、大比重及吸收式热泵原理,可显著提高储热密度。使用Aspen Plus对系统进行仿真,在设计工况下,系统的储热比为0.446,储热密度在30.34 kW·h/m^(3)左右,在变工况时,驱动温度升高(208~298℃),储热比降低(0.461~0.429),储热密度在30 kW·h/m^(3)左右;蒸发器出口温度升高(32~50℃),储热比降低(0.485~0.397),储热密度降低(32.98~26.96 kW·h/m^(3));冷凝温度升高(86~98℃),储热比升高(0.414~0.513),储热密度升高(28.22~34.71kW·h/m^(3));预热温度升高(81~93℃),储热比升高(0.414~0.514),储热密度升高(28.20~34.76 kW·h/m^(3))。Thermal energy storage is an effective measure for deep peak-regulating operation of coal-fired combined heat and power units.In this paper,an absorption heat pump thermal energy storage system using CaCl_(2)-H_(2)O worker pair is proposed.CaCl_(2)-H_(2)O solution is used as the thermal energy storage medium,which significantly improves the thermal energy storage density by utilizing the concentration difference,large specific gravity,and absorption heat pump principle.Aspen Plus is used to simulate the system.At the design condition,the system has a thermal energy storage ratio of 0.446 and a thermal energy storage density around 30.34 kW·h/m^(3).At variable operating conditions,the driving temperature increases(208∼298℃),the thermal energy storage ratio decreases(0.461∼0.429),and the thermal energy storage density is around 30 kW·h/m^(3).Increase in evaporator outlet temperature(32∼50℃),decrease in thermal energy storage ratio(0.485∼0.397),decrease in thermal energy storage density(32.98∼26.96 kW·h/m^(3)).When the condensing temperature increases(86∼98℃),the thermal energy storage ratio increases(0.414∼0.513),and the thermal energy storage density increases(28.22∼34.71 kW·h/m^(3)).Similarly,when the preheating temperature increases(81∼93℃),the thermal energy storage ratio increases(0.414∼0.514),and the thermal energy storage density increases(28.20∼34.76 kW·h/m^(3)).

关 键 词：吸收式热泵 热能存储 浓度差 热电解耦 

分 类 号：TM621[电气工程—电力系统及自动化]