ISO/TC 86/SC 4 - Testing and rating of refrigerant compressors

This document applies to the performance testing of compressor driven refrigerating systems (hereafter referred to as refrigerating systems) that operate according to the principle of vapour compression and consist of the circuit parts for compression, condensation, and evaporation as well as the connecting pipes and any necessary associated ancillaries required for a complete refrigeration circuit. This document does not apply to the testing of other refrigeration systems such as absorption or steam jet refrigerating systems. Testing of the suitability of a refrigerating system for a specific use, such as household refrigerators, refrigerated commercial and display cabinets, air conditioners, is not covered by this document. This document includes testing outside laboratories or where specific laboratory testing standards for systems do not exist and which is performed according to agreed operating conditions.

The provisions are applicable to single-stage refrigerant compressors of the positive-displacement type only. Selected test methods are described for the determination of the refrigerating capacity, power, isentropric efficiency, and the coefficient of performance. The test methods described may also be used as a guide for testing other types of refrigerant compressors. - Replaces the first edition (ISO 917:1974) and constitutes its technical revision.

The rating conditions are given in publications produced by various organizations such as CECOMAF for different practical uses. Because of many varying conditions in the presentation of performance data, it is not possible to make a direct comparison. Specified are therfore the items of performance data relating to the refrigerating capacity and power absorbed so that such comparisons may be made.