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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한설비공학회 설비공학논문집 설비공학논문집 제18권 제4호
발행연도
2006.4
수록면
312 - 319 (8page)

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초록· 키워드

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In this study, performance of 2 pure hydrocarbons and 7 mixtures was measured in an attempt to substitute HCFC22 used in air-conditioners and heat pumps. The mixtures were composed of R1270(propylene), R290(propane), HFC152a, and RE170(Dimethyl ether, DME). The pure and mixed refrigerants tested have GWPs of 3~58 as compared to that of CO₂ and the mixtures are all near-azeotropic showing the gliding temperature difference (GTD) of less than 0.6℃. Thermodynamic cycle analysis was carried out to determine the optimum compositions and actual tests were performed in a laboratory heat pump test bench at the evaporation and condensation temperatures of 7.5 and 45.1℃ respectively. Test results show that the coefficient of performance(COP) of these mixtures is up to 5.7% higher than that of HCFC22. While propane showed 11.5% reduction in capacity, most of the fluids tested had the similar capacity to that of HCFC22. Compressor discharge temperatures were reduced by 11~17℃ with these fluids. There was no problem with mineral oil since the mixtures were mainly composed of hydrocarbons. The amount of charge was reduced up to 55% as compared to HCFC22. Overall, these fluids provide good performance with reasonable energy savings without any environmental problem and thus can be used as long term alternatives for residential air-conditioning and heat pumping application.

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ABSTRACT
1. 서론
2. 실험장치
3. 실험결과 및 고찰
4. 결론
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