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Secondary refrigerants for indirect systems: thermophysical properties.

Fluidos para sistemas indirectos: propriedades termofisicas.

Type of article: Article

Summary

Spanish translation of an article presented at the IIR Meeting, held in Aarhus, Denmark (see IIR Bulletin, ref. 97-2858). The publication (issued from Handbook n. 12 of the Swedish Society of Refrigeration, updated with numerous other information) contains thermophysical properties for non-aqueous heat transfer liquids and comparisons are made. Property data from tables have been converted into uniform polynomial equations and sets of coefficients that can be put into computer programs for various applications. Water solutions of potassium acetate, the main ingredient in some secondary refrigerants on the market, perform somewhat better than ethylene glycol, much better than most other organic aqueous solutions but not as well as calcium chloride. Non-aqueous liquids, such as silicon oils, require 2.5-3 times higher volume flow. They give lower pressure drop but also lower heat transfer coefficient.

Details

  • Original title: Fluidos para sistemas indirectos: propriedades termofisicas.
  • Record ID : 1999-0845
  • Languages: Spanish
  • Source: Frío Calor Aire acondicionado - n. 289
  • Publication date: 1998/01
  • Document available for consultation in the library of the IIR headquarters only.

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