摘要
It is necessary to establish a simple and accurate mathematical model of capillary tubesfor the study of the system performance of refrigeration appliances equipped with the capillary tube. In this work, a new general integral model of capillajry tubes has been presented. It covers subcooled, two--phase and superheated flow regions which may occur inthe capillary tube. In the different flow region, special approximate integral equation is developed. This model is used in prediction of mass flow rate of the refrigerants, R12, R134aand R600a flowing through the capillary tube. The results are compared with those of thedistribut ed-- p aramet er mo del. The average devtat ion is 1. 3 0 % and t he maximum deviationis +4.58/-6.39%. The computation speed of the recommended model is more than one orderof magnitude higher than that of the distributed-parameter one.
It is necessary to establish a simple and accurate mathematical model of capillary tubesfor the study of the system performance of refrigeration appliances equipped with the capillary tube. In this work, a new general integral model of capillajry tubes has been presented. It covers subcooled, two--phase and superheated flow regions which may occur inthe capillary tube. In the different flow region, special approximate integral equation is developed. This model is used in prediction of mass flow rate of the refrigerants, R12, R134aand R600a flowing through the capillary tube. The results are compared with those of thedistribut ed-- p aramet er mo del. The average devtat ion is 1. 3 0 % and t he maximum deviationis +4.58/-6.39%. The computation speed of the recommended model is more than one orderof magnitude higher than that of the distributed-parameter one.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1999年第2期216-219,共4页
Journal of Engineering Thermophysics
基金
国家教委留学回国人员基金
上海交通大学科技发展基金
