标准23规定了容积式制冷剂压缩机和压缩机组的性能测试方法，包括容量、等熵效率和容积效率。标准23结合了ASHRAE标准23.1-2019，在制冷剂亚临界压力下运行的容积式制冷剂压缩机和冷凝机组的性能测试方法，以及ASHRAE标准23.2-2019，在制冷剂超临界压力下运行的容积式压缩机性能评级的测试方法，并按照ASHRAE的强制性语言要求编写。

Standard 23 prescribes methods for performance testing positive displacement refrigerant compressors and compressor units, including capacity, isentropic efficiency, and volumetric efficiency.Standard 23 combines ASHRAE Standard 23.1-2019, Methods for Performance Testing Positive Displacement Refrigerant Compressors and Condensing Units that Operate at Subcritical Pressures of the Refrigerant, and ASHRAE Standard 23.2-2019, Methods of Test for Rating the Performance of Positive Displacement Compressors that Operate at Supercritical Pressures of the Refrigerants, into one standard and is written in compliance with ASHRAE’s mandatory language requirements.