【作者】 陆宏杰； 张忠斌； 胡昕昊；

【Author】 LU Hongjie;ZHANG Zhongbin;HU Xinhao;Engineering Laboratory of Energy System Conversion and Emission Reduction of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University;

【机构】 江苏省能源系统过程转化与减排技术工程实验室能源与机械工程学院；

【摘要】 风冷压缩冷凝机组与冷风机是应用十分广泛的制冷系统,而非共沸制冷剂R404A、R407A和R407F在小型制冷系统中具有前景,其充注量对制冷设备性能存在影响。在实际的工程应用中,由于制冷剂和机组的匹配多样,厂家难以标定准确的制冷剂充注量,使制冷设备维护工作十分不便。本文提出了一种优化的内容积估算法对非共沸制冷剂充注量进行估算,并对一台5-HP中温型风冷压缩冷凝机组进行试验测量,结果表明该计算方法具有较高的准确性,且结果符合欠量要求,对非共沸制冷剂充注有一定的借鉴意义。更多还原

【Abstract】 Refrigeration systems consisted by air cooled compressor and air coolers are widely used. Nonazeotropic refrigerants, like R404A, R407A and R407F, are promising in small refrigeration system of which the refrigerant charge amount has an effect on the performance of small refrigeration system. In practices, because of the various combinations of refrigerant and equipment, it is difficult for the manufacturers to calibrate the accurate refrigerant charge amount. It is very inconvenient to maintain the refrigeration system. This paper proposes an optimized insde capacity estimation algorithm for estimating the refrigerant charge amount of non-azeotropic refrigerants. Experiments on a 5-HP medium-temperature air cooled equipment are conveyed. It proves that the method shows good accuracy and the results are meet the charge rules. The optimized method has positive reference value for the refrigerant charge of non-azeotropic refrigerants.更多还原