冷库冷凝热回收用三套管相变蓄热器蓄热特性模拟  

Heat Storage Characteristics of Triplex Tube Heat Exchanger Used for Cold Storage Condensation Heat Recovery

作　　者：罗小龙 袁艳平[1] 曹晓玲[1] 孙亮亮[1] 向波[1] Luo Xiaolong;Yuan Yanping;Cao Xiaoling;Sun Liangliang;Xiang Bo(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《制冷与空调（四川）》2018年第6期579-585,共7页Refrigeration and Air Conditioning

基　　金：建筑环境与能源高效利用四川省青年科技创新研究团队项目(2015TD0015)

摘　　要：为回收冷库制冷系统产生的冷凝热用于制取生产及生活热水,在压缩机和冷凝器之间接入三套管相变蓄热器。通过焓法建立三套管相变蓄能换热器的数学模型,分析制冷剂入口温度、制冷剂流量及结构参数对其蓄热特性的影响。结果表明:入口温度从110℃升高到130℃,熔化时间降低20.5%,且制冷剂入口温度越高,总蓄热量越大;制冷剂流量从0.008kg/s增加到0.024kg/s,熔化时间减小55.9%,改变流量只影响蓄热快慢而不影响总蓄热量大小,且随着流量增大其对蓄热性能的影响减弱;管径对蓄热性能的影响较小,较小的管径比有利于减小流动阻力而不影响蓄热性能。In order to recover the condensation heat of cold storage refrigeration system and use for domestic hot water preparation or industrial hot water supply,a triplex tube heat exchanger (TTHX) based on phase change materials was set between the compressor and the condenser.By establishing a mathematical model of TTHX according to enthalpy method,the dynamic characteristics was simulated,and the impact of refrigerant inlet temperature,mass flow rate and tube geometric parameters on the storage characteristics was investigated.The results show that with refrigerant inlet temperature increasing from 110℃ to 130℃,the melting time reduces 20.5%.The higher the refrigerant inlet temperature is,the greater the total heat storage capacity.When mass flow rate of refrigerant increases from 0.008kg/s to 0.024kg/s,the melting time reduces 55.9%.Changing the mass flow rate only affects heat storage rate without affecting the total heat storage capacity,and with the increase of mass flow rate,its effect on heat storage performance is weakened.Tube diameter has little effect on performance,and smaller diameter ratio helps to reduce flow resistance without affecting heat storage performance.

关 键 词：热回收 三套管相变蓄热器 蓄热特性 焓法 模拟 

分 类 号：TK02[动力工程及工程热物理]