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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2005.5
- 수록면
- 643 - 652 (10page)
이용수
초록· 키워드
오류제보하기
Saturated nucleate pool boiling experiments for binary mixtures, which are consisted of refrigerant Rl1 and R113, were performed with constant wall temperature condition. Results for binary mixtures were also compared with pure fluids. A microscale heater array and Wheatstone bridge circuits were used to maintain the constant temperature of the heating surface and to obtain heat flow rate measurements with high temporal and spatial resolutions. Bubble growth images were captured using a high speed CCD camera synchronized with the heat flow rate measurements. The departure time for binary mixtures was longer than that for pure fluids, and binary mixtures had a higher onset of nucleate boiling (ONB) temperature than pure fluids. In the asymptotic growth region, the bubble growth rate was proportional to a value between t^(1/6) and e^(1/4). The bubble growth behavior was analyzed to permit comparisons with binary mixtures and pure fluids at the same scale using dimensionless parameters. There was no discemable difference in the bubble growth behavior between binary mixtures and pure fluids for a given ONB temperature. And the departure radius and time were well predicted within a ±30% error. The minimum heat transfer coefficient of binary mixtures occurred near the maximum ｜y-x｜ value, and the average required heat flux during bubble growth did not depend on the mass fraction of Rl1 as more volatile component in binary mixtures. Finally, the results showed that for binary mixtures, a higher ONB temperature had the greatest effect on reducing the heat transfer coefficient.
목차
Abstract
1. 서론
2. 실험
3. 차원 해석
4. 실험결과 및 고찰
5. 결론
후기
참고문헌
참고문헌 (17)
참고문헌 신청
Scriven, L. E., 1959, “ On the Dynamics of Phase Growth," Chemical Engineering Science, Vol. 10, pp. 1~13.
Van Stralen, S. J. D., 1967, “The Mechanism of Nucleate Boiling in Pure Liquids and in Binary Mixtures - Part II," Int. J. of Heat and Mass Transfer, Vol. 10, pp. 1021~1046.
Stephan, K. and Komer, M., 1969, “Berechnung des Warmeubergangs Verdampfender Binarer Flussigkeitsgemische," Chemie Ingenieur Technik, Vol. 41, pp. 409~417.
Calus, W. F. and Leonidopoulos, D. J., 1974, Pool Boiling-Binary Liquid Mixtures," Int. J. Heat Mass Transfer. Vol. 17, pp. 249~256.
Calus, W. F. and Rice, P., 1972, “Pool Boiling-Binary Mixtures," Chemical Engineering Science, Vol. 27, pp. 1687~1697.
Van Stralen, S. J. D., 1967, “The Mechanism of Nucleate Boiling in Pure Liquids and in Binary Mixtures - Part II," Int. J. of Heat and Mass Transfer, Vol. 10, pp. 1021~1046.
Stephan, K. and Komer, M., 1969, “Berechnung des Warmeubergangs Verdampfender Binarer Flussigkeitsgemische," Chemie Ingenieur Technik, Vol. 41, pp. 409~417.
Calus, W. F. and Leonidopoulos, D. J., 1974, Pool Boiling-Binary Liquid Mixtures," Int. J. Heat Mass Transfer. Vol. 17, pp. 249~256.
Calus, W. F. and Rice, P., 1972, “Pool Boiling-Binary Mixtures," Chemical Engineering Science, Vol. 27, pp. 1687~1697.
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