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| Abstract |
An experimental study on flow boiling heat transfer in a horizontal microfin tube is conducted with pure refrigerants HFC134a, HCFC123 and HCFC22 using a water-heated double-tube type test section. Th...e test microfin tube is a copper tube having the following dimensions: 8.37mm mean inside diameter, 0.168mm fin height, 60fin number and 18 degree of helix angle. The local heat transfer coefficients for both counter and parallel flows are measured in a range of heat flux of 1 to 93W/m^2, mass velocity of 100 to 395kg/(m^2s) and reduced pressure of 0.07 to 0.21. The experimental data are tabled and compared with several existing correlations.show more
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KJ00004507739