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Evaporation Heat Transfer and Pressure Drop of R-22 and R-410A in Small Sized Micro-Fin Tubes
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 Title & Authors
Evaporation Heat Transfer and Pressure Drop of R-22 and R-410A in Small Sized Micro-Fin Tubes
Kim, Yong-Chan; Hwang, Jun-Hyeon; Yun, Rin;
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 Abstract
Characteristics of evaporation heat transfer in 6.2 and 5.1mm OD micro-fin tubes were investigated in the present study. The data were taken at evaporation temperatures of -5 and 5 and heat fluxes 5kW/ to 10kW/. Mass flux was consequently maintained at 210, 300 and 410kg/s for the 6.2mm OD tube and 465, 500 and 600kg/s for the 5.1mm OD tube. The effects of heat flux, mass flux, and outer diameter on the heat transfer coefficient are explored in the present study. The data showed that the evaporation heat transfer coefficient for the 6.2mm OD tube was averagly higher by 16% than that for a 7.0mm OD tube, while the 5.1mm OD tube had approximately 30% higher value than the 6.2mm OD tube.
 Keywords
R-22;R-410A;Evaporation Heat Transfer Coefficient;Pressure Drop;Micro-Fin Tube;
 Language
Korean
 Cited by
 References
1.
Schager, L. M., Pate, M. B., and Bergles, A. E., 1989, 'Heat Transfer and Pressure Drop During Evaporation and Condensation of R22 in Horizontal Micro-Fin Tubes,' Int. J. Refrig, Vol 12. pp 6-14

2.
Kuo, C. S.and Wang, C. C., 1996, 'In-Tube Evaporation of HCFC-22 in a 9.52mm Micro-Fin/Smooth Tube,' Int. J. Heat Mass Transfer, Vol 39, pp 2559-2569 crossref(new window)

3.
Kuo, C. S., Wang, C. C., Cheng, W. Y. and Lu, D. C., 1995, 'Evaporation of R22 in a 7mm micro-fin tube,' ASHRAE Trans, Vol 95. pp 1055-1061

4.
Seo, K. and Kim, Y., 2000, 'Evaporation heat transfer and Pressure Drop of R22 in 7mm and 9.52mm Smooth/Micro-fin Tubes,' Int. J. Heat Mass Transfer, Vol 43. pp 2869-2882 crossref(new window)

5.
조은석, 윤석호, 김민수, 2000, '수평원관 내 이산화탄소의 증발열전달 특성 연구,' 대한기계학회 2000년도 춘계학술대회 논문집 B, pp 104-107

6.
Taitel, Y. and Dukler, A. E., 1976, 'A Model for Predicting Flow Regime Transitions in Horizontal and Near Horizontal Gas-Liquid Flow,' A. I. Ch. E. Jl, Vol 22. pp 47-55 crossref(new window)

7.
Kandlikar, S. G., 1990, 'A General Correlation for Saturated Two-Phase Flow Boiling Heat Transfer Inside Horizontal and Vertical Tubes,' J. Heat Transfer, Vol 112. pp 219-228

8.
Muzzio, A., Niro, A. and Arosio, S., 1998, 'Heat Transfer and Pressure Drop During Evaporation and Condensation of R22 Inside 9.52mm O. D. Micro-Fin Tubes of Different Geometries,' J. Enhanced Heat Transfer, Vol.5. pp 39-52

9.
Chamra, L. M. and Webb, R. L., 1995, 'Condensation and Evaporation in Micro-Fin Tubes at Equal Saturation Temperatures,' J. Enhanced Heat Transfer, Vol 2. pp 219-229

10.
Chisholm, D., 1967, 'A Theoretical Basis for the Lockhart-Martinelli Correlation for Two-Phase Flow,' Int. J. Heat Mass Transfer, Vol 10. pp 1767-1778 crossref(new window)

11.
Wambsganss, M. W., Jendrzejcyk, J. A., France, D. M. and Obot, N. T., 1992, 'Friction Pressure Gradients in Two-Phase Flow in a Small Horizontal Rectangular Channel,' Exp Thermal and Fluid Sci. Vol 5. pp 40-56

12.
Ha, S. C., 2000, 'Some Aspects of Experimental in-Tube Evaporation,' Int. J. KSME, Vol 14. pp 537-546