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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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Indexing
- Themes: Mass transfer
- Keywords: Tube-in-tube; R407C; Horizontal tube; Mass transfer; Heat transfer; R22; Evaporation; Counterflow
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- Languages : English
- Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
- Formats : PDF
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- Author(s) : FRAUENDORF E.
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- Source: Heat transfer in condensation and evaporation: application to industrial and environmental processes. Preprints of the EUROTHERM Seminar 62.
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