本文基于伪二维有限体积法对微通道蒸发器内的两相流分布进行了建模。重点介绍了制冷剂侧的传热和压降特性。整体流量分布基于一个机械事实，即每个包含单个微通道管的流动路径上的压降必须相同。包括微通道管的一次压降和二次压降。该模型模拟了两种情况下微通道蒸发器中的制冷剂分布。首先，分离膨胀阀中产生的闪蒸气，只向蒸发器供应单相液体；第二种情况是传统的直接膨胀操作，两相状态的制冷剂直接送入蒸发器。得到了每个微通道管内的质量流量和质量、总压降和蒸发器表面温度，并与实验装置的数据进行了比较，实验数据和预测数据吻合良好。 引文:伊利诺伊州芝加哥ASHRAE会议论文

This paper describes modeling of two phase flow distribution in a microchannel evaporator, on the basis of the pseudo 2-D finite volume method. Emphasis is placed on refrigerant-side heat transfer and pressure drop characteristics. The global flow distribution is based on the mechanistic fact that the pressure drop along each flow path containing an individual microchannel tube must be the same. Both the primary pressure drop across the microchannel tube and minor pressuredrops are included.This model simulates refrigerant distribution in a microchannel evaporator for two cases. Firstly, flash gas generated in the expansion valve is separated and only single phase liquid is supplied into the evaporator; the second case is a conventional direct expansion operation where refrigerant in two-phase state is directly fed into the evaporator. Mass flow rate and quality in each microchannel tube, overall pressure drop and evaporator surface temperatures are obtained and then compared to data taken from the experimental facility, and good agreement is attained for the experimental and predicted data.