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Experimental evaluation of R22 and R407C evaporative heat transfer coefficients in a vapour compression plant.

Author(s) : APREA C., DE ROSSI F., GRECO A.

Type of article: Article, IJR article

Summary

The mean heat transfer coefficients of R22 and R407C in the coaxial counterflow evaporator (20 mm ID) of a refrigerating vapour compression plant have been experimentally measured. The experimental conditions under which heat transfer coefficients were determined reflect a typical working situation for small-scale refrigeration systems. The heat flux ranged from 1.9 to 9.1 kW/m2 and the mass flux was varied from 30 to 140 kg/m2s. The results illustrate that the R22 heat transfer coefficient is always greater than that of R407C. Furthermore, a comparison carried out between the experimental data and those predicted by means of the most credited literature relationships showed a strong overprediction for R407C coefficients.

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Pages: 366-377

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Details

  • Original title: Experimental evaluation of R22 and R407C evaporative heat transfer coefficients in a vapour compression plant.
  • Record ID : 2000-2453
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 23 - n. 5
  • Publication date: 2000/08

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