研究了制冷剂-22在短管节流器中的流动。该分析涉及流经5L/D20短管的初始过冷制冷剂。研究的流动条件是热泵中典型的流动条件。研究了流量对上游过冷度、上游压力、下游压力、管长度、管直径、入口倒角和出口倒角的依赖性。从大型实验数据库中建立了质量流量预测的关联式和流程图。关键词:实验，R22，制冷剂，管道，流体流动，测量，热泵，过冷，压力。引用:研讨会论文，佐治亚州亚特兰大，1990年

Refrigerant-22 flow through short tube restrictors was investigated. The analysis pertained to initially subcooled refrigerant flowing through short tubes with 5L/D20. The flow conditions studied were those typically found in heat pumps. Flow dependencies upon upstream subcooling, upstream pressure, downstream pressure, tube length, tube diameter, entrance chamfering, and exit chamfering were examined. A correlation and flow charts for mass flow rate prediction were developed from a large experimental data base.KEYWORDS: experiment, R22, refrigerants, tubes, fluid flow, measuring, heat pumps, subcooling, pressure.