耦合蒸汽压缩制冷循环和有机朗肯循环的冷电联供系统参数分析  

Parameter analysis of combined cooling and power system with vapor compression refrigeration cycle and organic Rankine cycle

作　　者：冯永强 王玉 吴秀芝 史睿菁 黄香玲 邓雨恒 储晨阳 孙天瑜 FENG Yongqiang;WANG Yu;WU Xiuzhi;SHI Ruijing;HUANG Xiangling;DENG Yuheng;CHU Chenyang;SUN Tianyu(School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2022年第5期566-572,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51806081);江苏省自然科学基金资助项目(BK20180882)。

摘　　要：针对目前空调冷凝余热直接排放导致环境温度升高的问题,采用有机朗肯循环回收蒸汽压缩制冷循环的冷凝热,构建耦合蒸汽压缩制冷循环和有机朗肯循环的冷电联供系统.冷凝剂采用纯工质R134a,有机工质采用混合工质R245fa/R123(0.5/0.5).基于热力学第一定律,构建循环的热力学模型,研究蒸发温度和冷凝温度对吸收全冷凝热和过热部分冷凝热2种工况下冷电联供系统的性能的影响并进行对比.结果表明,随着蒸汽压缩制冷循环冷凝温度增加,有机朗肯循环的净输出功由5.7 kW增加到6.4 kW,发电量由4.9 kW增加到5.5 kW;随着有机朗肯循环蒸发温度增加,净输出功由3.2 kW增加到8.4 kW,净发电量由2.5 kW增加到7.5 kW.随着蒸汽压缩制冷循环蒸发温度和有机朗肯循的冷凝温度的增加而减小.吸收全冷凝热量方式的VCC⁃ORC的性能参数COP增加了17.9%~26.9%.当有机朗肯循环系统工质吸收蒸汽压缩制冷循环系统释放的全冷凝热量时,净输出功和发电量明显优于只吸收过热部分热量的回收方式.To solve the problem of ambient temperature increasing due to the direct discharge of condensation waste heat from air conditioners,the organic Rankine cycle was adopted to recover the condensation heat of the vapor compression refrigeration cycle.A combined cooling and power system with vapor compression refrigeration cycle and organic Rankine cycle was constructed.R134a and R245fa/R123(0.5/0.5)were used for vapor compression refrigeration cycle and organic Rankine cycle,respectively.Based on the first law of thermodynamics,the thermodynamic model of cycle was constructed,and the effects of evaporation temperature and condensation temperature on the performance of the combined cooling and power system under the conditions of absorbing total condensation heat and superheated part condensation heat were investigated and compared.The results show that with the increasing of condensation temperature of the vapor compression refrigeration cycle,the net power output of the organic Rankine cycle is increased from 5.7 kW to 6.4 kW,and the power generation is increased from 4.9 kW to 5.5 kW.The net power output is increased from 3.2 kW to 8.4 kW,and the net power generation is increased from 2.5 kW to 7.5 kW with the increasing of evaporation temperature of organic Rankine cycle.However,they are decreased with the increasing of evaporation temperature of vapor compression refrigeration cycle and condensation temperature of organic Rankine cycle.The COP(coefficient of performance)of the VCC⁃ORC with absorbing all condensation heat is increased by 17.9%to 26.9%.When the working fluid of organic Rankine cycle system absorbs the total condensation heat released by the steam compression refrigeration cycle system,the performance of working and electricity generation is obviously better than that of the recovery method with only absorbing the superheated part heat.

关 键 词：有机朗肯循环 蒸汽压缩制冷循环 蒸发温度 冷凝温度 冷凝热 COP 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]