本SAE标准的目的是定义一套通用的热力学测试条件，以评估移动空调系统中与R-134a和R-1234yf制冷剂一起使用的内部热交换器。该SAE标准可用于测试实际车辆IHX设计或标准化IHX样品，这些样品可用于基于共同长度和形状的比较。

The purpose of this SAE Standard is to define a common set of thermodynamic test conditions to evaluate internal heat exchangers for use with R-134a and R-1234yf refrigerants in mobile air-conditioning systems. This SAE Standard can be used to test actual vehicle IHX designs or standardized IHX samples, which can be used for comparison based on a common length and shape.