冷媒圧縮機における湿り冷媒の圧縮特性

概要

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In this study, the compression characteristics of wet vapor refrigerant are investigated theoretically and experimentally. In the theoretical analysis, vapor and liquid phases, and the heat transfer between them are modeled in three different ways, i.e., homogeneous model, slug model and droplet model. The influence of the parameters, such as quality of wet vapor and cylinder wall heat transfer, on pressure as well as on temperature are investigated. On the other hand, two different types of experiment have been conducted to check the validity of the models. One is the refrigeration cycle experiment which was conducted using a reciprocating compressor under liquid suctioning. The results agree with the model in which the vapor-liquid mixture is considered homogeneous. The other is a model experiment which was conducted using the components of the reciprocating compressor without connection to the refrigeration cycle. The liquid refrigerant is injected into the compressor cylinder and different qualities of vapor and liquid slug are created inside the cylinder prior to compressor start. The results agree with the model in which the vapor and liquid slug are assumed to be separated with constant liquid slug temperature. Furthermore, the results of both experiments are investigated with the help of a droplet model with different droplet sizes.
社団法人日本機械学会の論文
1997-09-25