燃气机驱动的压缩式制冷机组的运行特性研究
Performance of gas engine driven compressiontype refrigerating machine
摘要：
根据实验得到的燃气机的万有特性曲线和压缩机厂家提供的变转速活塞式压缩机性能测试数据，对采用燃气机驱动的压缩式制冷机组的整体运行特性进行了研究。分析了蒸发温度、冷凝温度、转速和转速比对机组整体运行特性的影响。结果表明，转速和转速比对机组的性能影响较大。降低转速并不一定能提高机组一次能利用率，因为过低的转速会导致燃气机热效率的下降。而根据燃气机与压缩机容量的大小和机组运行要求，合理匹配燃气机与压缩机之间的转速，可以提高机组整体的运行性能。
Abstract：
Based on the performance data of gas engine obtained from the experiment and performance curve provided by the manufacturer, researches operating characteristics of the gas engine driven refrigerating compressor unit. Analyses the influence of evaporating temperature, condensing temperature, rotating speed and speed ratio on the operating characteristics of the unit. The results show that compressor rotating speed and speed ratio have important effect on the performance of the unit. Reduction of speed indefinitely improves the PER, because much lower speed may lead to efficiency decline. The PER of the unit can be improved if engine speed and compressor speed are matched well according to the capacity of gas engine and refrigerating compressor and operating requirement.
Keywords:gasengine,refrigeratingcompressor,rotatingspeed,operatingcharacteristics,primaryenergyratio(PER)