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Experiments on Condensation Heat Transfer Characteristics Inside a Microfin Tube with R410A
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 Title & Authors
Experiments on Condensation Heat Transfer Characteristics Inside a Microfin Tube with R410A
Han, Dong-Hyeok; Jo, Yeong-Jin; Lee, Gyu-Jeong; Park, Sim-Su;
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 Abstract
Due to the ozone depletion and global warming potentials, some refrigerants(CFx and HCFCs) have been rapidly substituted. R410A is considered as the alternative refrigerant of R22 for the air-conditioners used a home and in industry. Experiments on the condensation heat transfer characteristics inside a smooth or a micro-fin tube with R410A are performed in this study. The test tubes 7/9.52 mm in outer diameters and 3 m in length are used. Varying the mass flux of the refrigerant and the condensation temperatures, the average heat transfer coefficients and pressure drop are investigated. It is shown that the heat transfer is enhanced and the amount of pressure drops are larger in the microfin tube than the smooth tube. From the heat transfer enhancement coefficient and the pressure penalty factor, it is found that the high heat transfer enhancement coefficients are obtained in the range of small mass flux while the penalty factors are almost equal.
 Keywords
Microfin Tube;Condensation Heat Transfer;Pressure Drop;Heart Transfer Enhancement;
 Language
Korean
 Cited by
1.
마이크로핀관내 유동 양식과 응축 열전달 특성 연구,한동혁;이규정;

설비공학논문집, 2001. vol.13. 7, pp.602-611
 References
1.
Schlager, L.M. 1990, 'Evaporation and Condensation Heat Transfer and Pressure Drop in Horizontal, 12.7mm Microfin Tubes with refrigerant 22' Journal of Offshore Mechanics and Arctic Engineering, Vol. 112, pp. 1041-1047

2.
Chamra, L. M. and Webb, R. L. 1996, 'Advanced Microfin Tubes for Condensation,' Int. J. Heat Transfer, Vol. 39, No. 9, pp. 1839-1846 crossref(new window)

3.
Shinohara, Y. and Tobe, M., 1985, 'Development of an Improved Thermofin Tube,' Hitachi Cable Review, No. 4, pp. 47-50

4.
Khanpara, J.C., Bergles, A.E. and Pate, M.B. 1986, 'Augumentation of R113 In-Tube Condensation with Microfin Tubes, in Heat Transfer in Air Conditioning and Refrigeration Equipment,' HTD-Vol. 6, Eds. J.A. Kohler and Lu J.W.B., pp. 21-32, ASME, New York, p. 21

5.
Kaushik, N. and Azer, N.Z., 1989, 'An Analytical Heat Transfer Prediction Model for Condensation Inside Longitudinally Finned Tubes,' ASHRAE Transaction, Vol. 95, part 2, pp. 516-523

6.
Azer, N.Z. and Sur, S.A. 1991, 'Augmentation of Condensation Heat Transfer by Internally Finned Tubes and Twisted Tape Inserts.', Proceeding of the Seventh International Heat Transfer Conference, Vol 5, pp. 33-38

7.
최준영, 이진호, 1999, '미세휜관내 대체냉매의 응축 및 증발시 압력강화 예측에 관한 연구,' 대한기계학회 추계학술대회 논문집 B, pp. 378-385

8.
장재식, 곽경민, 김창범, 배철호, 정모, 김영생, 윤백, 1998, 'R407C를 사용한 확관후 마이크로휜관내에서의 열전달 특성에 관한 연구,' 공기조화 냉동공학회 하계학술발표회 논문집, pp. 567-572

9.
권정태, 안예찬, 허덕, 김무환, 1998, '마이크로휜관내의 대체냉매 응축열전달,' 대한기계학회 춘계학술대회 논문집 B, pp. 183-187

10.
Akers, W.W. and Rosson, H.F. 1960, 'Condensation Inside a Horizontal Tube.', Chemical Engineering Progress Symposium Series, Vol. 50, No. 30, pp. 145-149

11.
Cavallini, A. and Zecchin, R. 1974, 'A Dimensionless Correlation for the Heat Transfer in forced Convective Condensation,' Fifth International Heat Transfer Conference, Tokyo. Vol 3, pp. 309-313

12.
Shah, S.A. 1979, 'A General Correlation for Heat Transfer During Film Condensation Inside Pipes' International Journal of Heat and Mass Transfer, Vol. 22, pp. 547-556 crossref(new window)

13.
A. Gavallini, D. Del Col, L. Dorretti, G. A. Longo, L. Rossetto, 'Condensation Heat Transfer with Refrigerants,' Two-Phase Flow Modeling and Experimentation 1999, Pisa