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Optimal operation of cooling coils for display cabinets in secondary-loop refrigeration systems.

Author(s) : HAGLUND STIGNOR C., FAHLÉN P., SUNDÈN B., et al.

Summary

Optimal operation of cooling coils used for display cabinets cooled by liquid secondary refrigerants was studied by applying a calculation model. The applied model was created and verified in previous work. Three different cooling-coil geometries and three different liquid secondary refrigerants were studied. The results show that the values of the optimal liquid flow and inlet temperature depend strongly upon the cooling-coil geometry, the choice of secondary refrigerant and the cooling demand of the display cabinet. It was also shown that in order to take full advantage of the low viscosity of a liquid, the liquid inlet temperature must be sufficiently high. Otherwise most of the gain is lost. In addition, for the most efficient cooling coil presented in this study, laminar flow was found to be the optimal flow regime no matter which of the secondary refrigerants that was used.

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Details

  • Original title: Optimal operation of cooling coils for display cabinets in secondary-loop refrigeration systems.
  • Record ID : 2004-2250
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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