空调和制冷产品的两个基本要求是更高的效率和紧凑的尺寸。过去的能源危机和最近国际社会对气候变化或全球变暖潜能（GWP）的担忧已经引起了公众对提高空调和制冷系统能效的关注。为了提供微通道蒸发器的基本设计信息，进行了几何结构、操作条件和流体性质对水平换热器歧管中制冷剂分布和压降影响的实验研究。 为了实现所提出的目标，开发了一个带有可视化部分的实验装置，用于模拟真实的换热器歧管几何结构。

The two basic demands for air-conditioning and refrigeration products are higher efficiency and compact size. Past energy crises and recent international concerns about climate change or global warming potential (GWP) have garnered public attention on improving energy efficiency of airconditioning and refrigeration systems. In order to provide essential design information of microchannel evaporators, an experimental study was conducted on the effects of geometry, operating conditions and fluid properties on the distribution of refrigerant and pressure drops in horizontal heat exchanger manifolds. To achieve the proposed objective, an experimental facility with a visualization section for mimicking a real heat exchanger manifold geometry was developed.