대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제19권4호
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- Pages.1125-1133
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- 1995
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- 1225-5963(pISSN)
DOI QR Code
비공비혼합냉매를 사용하는 열펌프의 응축열전달 특성
Condensing Heat Transfer Characteristics on a Heat Pump System Using Non-Azeotropic Refrigerant Mixtures
초록
Experiments were performed to investigate the condensing heat transfer characteristics of non-azeotropic mixtures of R-22 and R-114 in a heat pump system with a horizontal smooth tube as a condenser. The ranges of parameters, such as heating capacity, mass flow rate of refrigerant and quality were 780-3,480W, 24-71kg/h, and 0-1, respectively. The overall compositions of R-22 in a R-22/114 mixture were 25, 50, 75 and 100 per cent by wight. The results show that the overall condensing heat transfer coefficients for the mixtures were lower than the pure R-22 values. Local heat transfer coefficient of the pure R-22 was hghest at the top of the test tube. The local heat transfer coefficient of R-22/114 (50/50 wt%) at side and bottom of the test tube was higher than that at the top. From the obtained data, a prediction for the condensing heat transfer coefficients of the mixture was done based on the method of Fujii.
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