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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.8
- 수록면
- 161 - 171 (11page)
이용수
초록· 키워드
오류제보하기
In this study, the condensation heat transfer characteristics of the R-1234yf refrigerant were analyzed according to the variation in tube diameter, which were then considered as condenser design data. The inner diameter of the experimental tube was varied from 3.7 ㎜ to 5.3 ㎜. Subsequently, the heat transfer coefficient of R-1234yf was analyzed according to the changes in vapor quality, mass flux, saturation temperature, and pipe diameter. Slug flow was observed at a low mass flux, and annular flow was observed at a high mass flux. Furthermore, it was observed that the heat transfer coefficient’s value increased with increase in the vapor quality and mass flux, whereas it decreased with increase in the tube diameter and saturation temperature. By comparing the heat transfer coefficients of the refrigerants R-134a and R-1234yf, it was found that the heat transfer coefficient of R-134a is higher. Furthermore, four correlations were conducted, and it was found that the correlation of Dobson and Chato and the correlation of Bashar can predict the experimental condensation heat transfer coefficient within an error range of ±10%.
목차
Abstract
1. 서론
2. 실험 장치 및 방법
3. 실험결과 및 고찰
4. 결론
REFERENCES
참고문헌 (18)
참고문헌 신청
Yoo, H. K. and Jung, D. S., Computer Simulation Study for Analyzing Alternative Refrigerants in Residential Air-conditioners, Journal of the Korean Solar Energy Society, Vol. 15, No. 3, pp. 75-90, 1995.
Park, K. J., Lee, Y., Choe, D. S., and Jung, D. S., Performance of R1234yf and R1234yf/R134a Mixture under Mobile Air-conditioner Operating Conditions, Journal of Air-Conditioning and Refrigeration Engineerin, Vol. 22, No. 12, pp. 837-844, 2010.
Jetter, J. J., Smith, N. D., Ratanaphruks, K., Ng, A. S., and Tufts, M. W., Evaluation of Alternatives for HFC-134a Refrigerant in Motor Vehicle Air Conditioning, Proceedings of the International Conference on Ozone Protection Technologies, Washington, D. C., USA, pp. 845-854, 1997.
Nielsen, O. J., Javadi, M. S., Sulbaek Andersen, M. P., Hurley, M. D., Wallington, T. J., and Singh, R., Atmospheric chemistry of CF3CFCH2: Kinetics and mechanisms of gas-phase reactions with Cl atoms, OH radicals, and O3, Chemical Physics Letters, Vol. 439, No. 1-3, pp. 18-22, 2007.
Del Col, D., Torresin, C. D., and Cavallini, A., Heat Transfer and Pressure Drop During Condensation of the Low GWP Refrigerant HFO1234yf, International Journal of Refrigeration, Vol. 33, No. 7, pp. 1307-1318, 2010.
Park, K. J., Lee, Y., Choe, D. S., and Jung, D. S., Performance of R1234yf and R1234yf/R134a Mixture under Mobile Air-conditioner Operating Conditions, Journal of Air-Conditioning and Refrigeration Engineerin, Vol. 22, No. 12, pp. 837-844, 2010.
Jetter, J. J., Smith, N. D., Ratanaphruks, K., Ng, A. S., and Tufts, M. W., Evaluation of Alternatives for HFC-134a Refrigerant in Motor Vehicle Air Conditioning, Proceedings of the International Conference on Ozone Protection Technologies, Washington, D. C., USA, pp. 845-854, 1997.
Nielsen, O. J., Javadi, M. S., Sulbaek Andersen, M. P., Hurley, M. D., Wallington, T. J., and Singh, R., Atmospheric chemistry of CF3CFCH2: Kinetics and mechanisms of gas-phase reactions with Cl atoms, OH radicals, and O3, Chemical Physics Letters, Vol. 439, No. 1-3, pp. 18-22, 2007.
Del Col, D., Torresin, C. D., and Cavallini, A., Heat Transfer and Pressure Drop During Condensation of the Low GWP Refrigerant HFO1234yf, International Journal of Refrigeration, Vol. 33, No. 7, pp. 1307-1318, 2010.
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