冰箱用压缩机变工况运行的热力性能实验研究  

Experimental Study on Thermodynamic Performance of Refrigerator Compressor Running at Variable Condition

作　　者：王晓燕[1] 沈希[2] 翁孟超[1] 

机构地区：[1]浙江师范大学工学院,浙江金华321004 [2]浙江工业大学机械工程学院,浙江杭州310014

出　　处：《压缩机技术》2015年第6期12-16,共5页Compressor Technology

基　　金：浙江省教育厅一般项目(Y201225635)

摘　　要：采用实验的方法,以R600a为工质,吸排气压力为自变量,分析了吸排气压力对往复压缩机的热力性能影响。实验结果表明:在其他参数不变时,提高吸气压力使制冷量和功耗增加,但因制冷量增幅比功耗增幅大,故性能系数COP增加;提高排气压力造成压缩机制冷量降低,功耗反而增大,COP显著降低,排气温度先降低后升高,运行经济性变差。The paper adopts the method of experiment, the reciprocating compressor takes R600a as the refrigerant and suction and discharge pressure as the independent variable, analyses the impact of suction and discharge pressure on the thermodynamic perfor- mance. The experiment result shows that elevation of suction will increase the refrigeration capacity and power consumption with oth- er parameters unchanged, but the growth range of refrigeration capacity is greater than power consumption, so coefficient of perfor- mance （COP） increases. The increasing of discharge pressure will make the refrigeration capacity of compressor reduce, power con- sumption increase, coefficient of performance （COP） significantly reduce, the discharge temperature reduce at first and rise afterwards, and this will make the operational efficiency of reciprocating compressor worse.

关 键 词：往复压缩机 变工况 计算模型 热力性能 

分 类 号：TH457[机械工程—机械制造及自动化]