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The extraordinary properties of carbon dioxide as secondary refrigerant.

Author(s) : WINKLER H., THEOBALD B., QUACK H.

Summary

Often, heat has to be moved out of a very compact structure, where there is hardly any space for cooling channels. So there is the question: "What is the best fluid to remove the maximum amount of heat out of a long small diameter cooling channel?" Analysis shows that this depends on one hand on the available pressure drop and on the other hand on the square of the possible enthalpy change divided by the square root of the average specific volume of the fluid. If one compares different gases, liquids and phase-change materials, it turns out that fluids with the phase change from liquid to vapor just below and above the critical point provide the optimum solution. One example of such an excellent secondary refrigerant is carbon dioxide, which has the additional advantage of being a refrigerant. So it is possible to integrate the cooling loop directly into the refrigerator circuit.

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Pages: ICR07-B1-733

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Details

  • Original title: The extraordinary properties of carbon dioxide as secondary refrigerant.
  • Record ID : 2007-1930
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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