IIR document

Tests with R290-R600 mixtures in a domestic refrigerator-freezer.


The propane-butane mixture was tested as a drop-in substitute in a domestic 20-cubic-foot (about 540 liter) unit. All hardware components were the original ones used for R12, except the capillary tube, which was lengthened to control the flow rate. To find the best performance, tests were conducted for several lengths of capillary tube and varying mixture concentration and charge. The highest energy savings of 6.5% were achieved with a blend of 70% R290 and 30% R600, and 70 g of charge.

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  • Original title: Tests with R290-R600 mixtures in a domestic refrigerator-freezer.
  • Record ID : 1995-2245
  • Languages: English
  • Source: New Applications of Natural Working Fluids in Refrigeration and Air Conditioning
  • Publication date: 1994/05/10
  • Document available for consultation in the library of the IIR headquarters only.


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