Temperature regimes of calorimetric tests of small hermetic refrigeration compressors

The comparative temperature conditions currently used for testing compressors according to standards ASHRAE 41.9, EN 12900 and G OST17008-85 do not correspond to the real operating conditions in domestic refrigerators. The standard ASHRAE is totally unacceptable for the assessment of characteristics of compressors operating on different refrigerants, The European standard is more acceptable, but the most objective comparison of compressors can be obtained only under temperature conditions actually existing in domestic refrigerators during most part of the year.

To evaluate the compressors working on zeotropic mixtures it is necessary to use the equivalent thermodynamic cycles that are considered in this article. If the compressor is designed for work in a two-compartment refrigerator its tests should be carried out according to a special cycle.