论文部分内容阅读
毛细管在小型蒸汽压缩式制冷装置中起到降压、降温和调节流量的作用。在制冷系统的设计中,毛细管的长度和直径与制冷系统的匹配至关重要。传统的方法是通过查阅已编制的毛细管选型图表和经验公式,但结果很不准确且可选制冷剂种类很少,需要结合大量的实验才能确定毛细管的尺寸。经过大量研究,已发展出绝热毛细管内3种流动模型,即均相流动模型、分相流动模型和漂移流动模型。通过比较分析这3种基本流动模型,不仅给制冷系统中毛细管的选型和设计计算提供了参考,而且也为制冷系统的性能优化提供了方向。
Capillary in a small vapor compression refrigeration device to play buck, cooling and regulating the role of traffic. In the design of refrigeration systems, matching the length and diameter of the capillary with the refrigeration system is crucial. The traditional method is to check the capillary selection chart and empirical formula, but the result is very inaccurate and there are only a few types of refrigerants available. A large number of experiments are needed to determine the capillary size. After extensive research, three kinds of flow models have been developed in adiabatic capillary, that is, homogeneous flow model, split-phase flow model and drift flow model. By comparing and analyzing these three basic flow models, it not only provides a reference for the selection and design of capillary in refrigeration system, but also provides the direction for the performance optimization of refrigeration system.