ISO 916-2020 pdf free.Testing of refrigerating systems.
This document applies to the performance testing of compressor driven refrigerating systems(hereafterreferred to as refrigerating systems) that operate according to the principle of vapour compression andconsist of the circuit parts for compression, condensation, and evaporation as well as the connectingpipes 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 steamjet 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 forsystems do not exist and which is performed according to agreed operating conditions.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies.Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO 5167(all parts),Measurement of fluid flow by means of pressure differential devices inserted in circularcross-section conduits running full.
For the purposes of this document, the following terms and definitions apply.
Only the characteristics essential to the economic efficiency and the operation of refrigeratingsystems and verifiable by usual measurement methods shall be the subject of performance warranty.Thisrequires allowances for the variations of operating conditions which are hardly avoidable in practice.For the data according to 5.2.1 to 5.2.7, it is recommended to indicate several values near theoperating conditions according to 5.3, particularly for the temperature values. To avoid interpolation,these values may be presented graphically within the variation limits for each pair of values.Permissibledeviations shall be subject to agreement.The conversion to warranty conditions requires the indication of the compressor speed or the powersupply frequency (for motor compressors), respectively, the refrigerant pressures in the evaporator andthe condenser or the evaporation and condensing temperature, respectively,as well as the intermediatepressures in case of multiple-stage systems.ISO 916 pdf download.