结合制冷的新型吸收式热变换器热力分析  

Thermodynamic analysis of a new ejection-absorption heat transformer combined with refrigeration

作　　者：王子彪[1] 杨勃[1] 熊伟[1] 范婷婷[1] 李凤雪[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《可再生能源》2015年第9期1368-1375,共8页Renewable Energy Resources

基　　金：国家十二五科技支撑计划项目(2012BAJ26B02);住房与城乡建设部项目(2013-K1-58);沈阳建筑大学科研项目(2013141)

摘　　要：提出了一种能同时制冷的溴化锂喷射-吸收式热变换器系统。根据热质平衡理论和喷射器理论,对该新型系统进行了热力学模拟,分析了各参数对系统性能的影响。并将该系统用于回收55℃的废热,解决同时需要制热、制冷场所的冷、热源问题。结果表明:废热先流经蒸发器的串联流程的性能优于其它流程;低压蒸发器内冷冻水出口温度越高、冷凝器中冷却水出口温度越低,系统性能越好;而吸收器中用户供水温度越高,系统制热火用效率ηr越大,系统能效比COP却越低。A new ejection-absorption heat transformer combined with refrigeration is put forward to achieve both cooling and heating in this paper. A thermal simulation of this new system is conducted based on theory of mass and energy balances and ejector theory. The effects of various parameters on the performance of the system are analyzed. The system recovers 55 ℃ exhaust heat to provide heat and cold sources for heating and cooling. The results show that the performance of the heat flows through the evaporator first of tandem process is superior to the other processes;The higher the temperature of chilled water in low pressure evaporator and the lower the temperature of cooling water in condenser outlet, the better the system performs. And high temperature water supply in absorber causes great efficiency of heating exergy, but lower coefficient of performance.

关 键 词：制冷 吸收式热变换器 喷射 回收 废热 

分 类 号：TB616[一般工业技术—制冷工程] TB65