Abstract
Condensation heat transfer experiments for R-22 and R-407 C refrigerants mixed with mineral oil and POE oil respectively were performed in straight and U-bend sections of a microfin tube. Experimental parameters were an oil concentration from 0 to 5 %, a mass flux from 100 to 400 kg/m{sup 2}s and an inlet quality from 0.5 to 0.9. The enhancement factors for R-22 and R-407 C refrigerants at the first straight section decreased continuously as the oil concentration increased. They decreased rapidly as the mass maximum at the 90 deg. position. The heat transfer coefficients at the second straight section within the dimensionless length of 48 were larger by a maximum of 33 % than the average heat transfer coefficients at the first straight section. (author). 10 refs., 6 figs., 1 tab.
Citation Formats
Cho, K N, and Tae, S J.
Condensation heat transfer for refrigerant-oil mixtures in microfin tube condenser.
Korea, Republic of: N. p.,
2000.
Web.
Cho, K N, & Tae, S J.
Condensation heat transfer for refrigerant-oil mixtures in microfin tube condenser.
Korea, Republic of.
Cho, K N, and Tae, S J.
2000.
"Condensation heat transfer for refrigerant-oil mixtures in microfin tube condenser."
Korea, Republic of.
@misc{etde_20220128,
title = {Condensation heat transfer for refrigerant-oil mixtures in microfin tube condenser}
author = {Cho, K N, and Tae, S J}
abstractNote = {Condensation heat transfer experiments for R-22 and R-407 C refrigerants mixed with mineral oil and POE oil respectively were performed in straight and U-bend sections of a microfin tube. Experimental parameters were an oil concentration from 0 to 5 %, a mass flux from 100 to 400 kg/m{sup 2}s and an inlet quality from 0.5 to 0.9. The enhancement factors for R-22 and R-407 C refrigerants at the first straight section decreased continuously as the oil concentration increased. They decreased rapidly as the mass maximum at the 90 deg. position. The heat transfer coefficients at the second straight section within the dimensionless length of 48 were larger by a maximum of 33 % than the average heat transfer coefficients at the first straight section. (author). 10 refs., 6 figs., 1 tab.}
place = {Korea, Republic of}
year = {2000}
month = {Apr}
}
title = {Condensation heat transfer for refrigerant-oil mixtures in microfin tube condenser}
author = {Cho, K N, and Tae, S J}
abstractNote = {Condensation heat transfer experiments for R-22 and R-407 C refrigerants mixed with mineral oil and POE oil respectively were performed in straight and U-bend sections of a microfin tube. Experimental parameters were an oil concentration from 0 to 5 %, a mass flux from 100 to 400 kg/m{sup 2}s and an inlet quality from 0.5 to 0.9. The enhancement factors for R-22 and R-407 C refrigerants at the first straight section decreased continuously as the oil concentration increased. They decreased rapidly as the mass maximum at the 90 deg. position. The heat transfer coefficients at the second straight section within the dimensionless length of 48 were larger by a maximum of 33 % than the average heat transfer coefficients at the first straight section. (author). 10 refs., 6 figs., 1 tab.}
place = {Korea, Republic of}
year = {2000}
month = {Apr}
}