压缩机变工况运行的制冷量定量关系式研究  

Study on Quantitative Relationship Formula of Refrigerating Capacity Running at Variable Condition of Compressor

作　　者：王晓燕[1] 翁孟超[1] 

机构地区：[1]浙江师范大学工学院,浙江金华321004

出　　处：《压缩机技术》2016年第1期16-21,共6页Compressor Technology

基　　金：浙江省教育厅一般项目(Y201225635)资助

摘　　要：针对压缩机实际运行时机理模型,难以准确描述各影响因素间的关系,而造成精度不高且不便于工程计算的问题,根据热工学理论,结合机理分析与实验数据拟合的灰箱法,构建往复压缩机输气系数的数学模型,提出压缩机制冷量与主要热力学参数间的定量关系式。采用研制开发的小型制冷压缩机性能测试台测试,将计算结果与实验数据进行对比,结果表明:制冷量的理论计算值与实验数据最大相对误差为4.17%,最小误差为0.01%,平均误差为0.96%。理论结果与实验数据基本吻合,证明了该公式的正确性和可行性。It is difficult to accurately describe the relationship between mechanism model of compressor and the various factors during its actual operation, which will result in the accuracy low, and it is not convenient to calculate for engineering. According to theory of pyrology, combining with the gray box method of mechanism analysis and experimental data fitting, the mathematics model of coeffi- cient of capacity for reciprocating compressor was constructed. The quantitative relationship formula was put between refrigeration ca- pacity and main thermodynamic parameters. The test has been conducted in a small refrigeration compressor performance test device, the results show that the greatest relative error between the theoretical calculation value of refrigeration capacity and experimental da- ta is 4.17%, the minimum error is 0.01%, and the average error is 0.96%. The theoretical results are consistent with the experimen- tal data, and it proves the formula correctness and feasibility.

关 键 词：制冷量 热力学参数 机理模型 热工学 输气系数 

分 类 号：TH457[机械工程—机械制造及自动化]