The literature survey revealed that limited prior investigations exist on the two-phase refrigerant distribution for a horizontal header/horizontal mini-channel tube configuration, which is of importance in many heat exchange circumstances including the cooling of an electric vehicle battery. In this study, we investigated R-1234yf distribution into two mini-channel tubes from a header. Especially, the focus was concentrated on the effect of inlet and outlet configuration on the flow distribution. The tests were conducted for the mass flux from 49 to 147 kg/m²s and the inlet quality from 0.2 to 0.8. The effect of the inclination of the heat exchanger was also investigated. The flow distribution was mainly governed by the balance of the relating forces – momentum, centrifugal and gravitational. Thus, poor distribution was obtained at a tilted case, where the momentum and centrifugal forces were assisting. The flow distribution was also highly dependent on the inlet configuration. On the other hand, the effect of outlet configuration was of secondary importance. The parallel inlet induced a significant mal-distribution compared with the normal inlet, especially in the channel away from the inlet, where an early dry out in the channel was observed. A flow distribution correlation was developed, which predicted the data within ± 30%.

文献调查显示，对于水平集管/水平微型通道管配置的两相制冷剂分配存在有限的先前研究，这在许多热交换环境中很重要，包括电动汽车电池的冷却。在这项研究中，我们研究了 R-1234yf 从集管到两个微型通道管的分布。特别是，重点集中在入口和出口配置对流量分布的影响上。测试是针对 49 至 147 kg/m ²的质量通量进行的s 和入口质量从 0.2 到 0.8。还研究了热交换器倾斜度的影响。流动分布主要由相关力的平衡控制——动量、离心力和重力。因此，在倾斜的情况下获得了较差的分布，其中动量和离心力是辅助的。流量分布也高度依赖于入口配置。另一方面，出口配置的影响是次要的。与正常入口相比，平行入口引起了显着的分布不均，尤其是在远离入口的通道中，在该通道中观察到过早变干。开发了流量分布相关性，预测数据在 ± 30% 以内。