Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 23, Issue 5, Pages 366-377Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0140-7007(99)00068-7
Keywords
heat transfer; mass transfer; evaporation; horizontal tube; counterflow; ring tube; R22; R407C
Categories
Ask authors/readers for more resources
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/m(2) and the mass flux was varied from 30 to 140 kg/m(2) s. 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 strongly overprediction for R407C coefficients. (C) 2000 Elsevier Science Ltd and IIR. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available