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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한설비공학회 International Journal of Air-Conditioning and Refrigeration Journal Of Air-Conditioning and Refrigeration Vol.3
발행연도
1995.8
수록면
12 - 20 (9page)

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초록· 키워드

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Experiments on the performance of a refrigeration system using promising alternatives to R12 and R22 have been carried out. In the experimental testing, concentric-tubes of counter-flow type are used for a condenser and an evaporator and a variable speed motor is used to drive a compressor. In this study, R134a, R152a, and R22/R142b mixture(50/50 by mass) were tested as the alternatives to R12, and R134a to R22. Tests were performed by varying the inlet and outlet temperatures of secondary fluids of the evaporator and condenser. Mean-while, the compressor speed and degree of superheat and subcooling are kept constant. Results show that the refrigeration capacity of R134a is comparable to that of R12, compressor power consumption of R134a is greater than any other refrigerant including R12. In the aspect of thermal performance, i. e. refrigeration capacity, compressor power and coefficient of performance, R152a appears to be the best candidate for R12 replacement. R22/R142b is superior to R12 in thermal performance. If the same refrigeration capacity is expected between systems with R22 and R134a, the latter requires a higher mass flow rate, thus a higher capacity compressor.

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Abstract

1. Introduction

2. Experiments

3. Results

4. Conclusion

References

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