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Secondary refrigerants for indirect systems: on thermophysical properties.

Author(s) : MELINDER Å.

Summary

The publication (issued from Handbook n.12 of the Swedish Society of Refrigeration, updated with numerous informations) contains thermophysical properties for aqueous solutions and some non-aqueous heat transfer liquids and comparisons are made. Property data from tables have been converted into uniform polynom equations and sets of coefficients that can be put into computer programs for various applications. The paper focuses on comparisons of different secondary refrigerants for freezer applications. Water solutions of potassium acetate, the main ingredient in some new secondary refrigerants on the market, perform somewhat better than ethylene glycol, much better than most other organic aqueous solutions but not as good 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.

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Pages: p 195-205

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Details

  • Original title: Secondary refrigerants for indirect systems: on thermophysical properties.
  • Record ID : 1997-2858
  • Languages: English
  • Source: Applications for Natural Refrigerants
  • Publication date: 1996/09/03
  • Document available for consultation in the library of the IIR headquarters only.

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