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Liquid-side heat transfer and pressure drop in finned-tube cooling-coils operated with secondary refrigerants.

Author(s) : HAGLUND STIGNOR C., SUNDÉN B., FAHLÉN P.

Type of article: Article, IJR article

Summary

In this study, full-scale experiments with two different conventional cooling-coils aimed for display cabinets were performed. Heat transfer and pressure drop on the liquid side for three different single phase secondary refrigerants were studied and compared to predictions by existing correlations. Predominantly, the laminar flow regime was studied. The results show that when predicting the heat transfer performance on the liquid side of a cooling-coil the Gnielinski correlation for thermally developing flow and uniform wall temperature boundary conditions (T) leads to good agreement, assuming a new entrance length is formed after each U-bend. In addition, these entrance lengths must also be accounted for, when predicting the pressure drop on the liquid side of the cooling-coil. The uncertainty of measurement can be a problem in this type of investigations and this has been taken into consideration when analysing the results.

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Pages: 1278-1289

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Details

  • Original title: Liquid-side heat transfer and pressure drop in finned-tube cooling-coils operated with secondary refrigerants.
  • Record ID : 2007-2656
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 7
  • Publication date: 2007/11

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