자연냉매를 사용하는 초저온용 이원 및 이단압축 냉동방식의 운전특성 비교
Comparison of Operation Characteristics of Cascade Refrigeration and 2-Stage Compression System for Ultra-low Temperature using Natural Refrigerants
6
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
In this paper, the performance characteristics of a cryogenic refrigeration system used in fields such as HMR(Home Meal Replacement) that require ultra-low temperatures of -50℃ using natural refrigerants according to the recent enforcement of the Atmosphere Environment Conservation Act were investigated. For this purpose, a 2-stage compression refrigeration system using R744(CO2) and a cascade refrigeration system using R747/R404A and R747/R717(NH3) were applied. The COP(coefficients of performance) of each refrigeration system were compared according to changes in evaporation and condensation temperature, subcooled and superheated degree. Although the coefficient of performance of the 2-stage compression refrigeration system using R744 was superior to that of the cascade refrigeration system, 2-stage refrigeration system was considered that various problems should be solved in practical terms. In addition, the COP of R744/R717 for various operating conditions showed similar results to R744/R404A, so the possibility of alternativeness could be confirmed in the cascade refrigeration system.
Abstract
In this paper, the performance characteristics of a cryogenic refrigeration system used in fields such as HMR(Home Meal Replacement) that require ultra-low temperatures of -50℃ using natural refrigerants according to the recent enforcement of the Atmosphere Environment Conservation Act were investigated. For this purpose, a 2-stage compression refrigeration system using R744(CO2) and a cascade refrigeration system using R747/R404A and R747/R717(NH3) were applied. The COP(coefficients of performance) of each refrigeration system were compared according to changes in evaporation and condensation temperature, subcooled and superheated degree. Although the coefficient of performance of the 2-stage compression refrigeration system using R744 was superior to that of the cascade refrigeration system, 2-stage refrigeration system was considered that various problems should be solved in practical terms. In addition, the COP of R744/R717 for various operating conditions showed similar results to R744/R404A, so the possibility of alternativeness could be confirmed in the cascade refrigeration system.
참고문헌 (7)
- Asano Hideyo, "Energy saving effect of NewTon 3000 appling NH3", CO2, 2011, 250~256
- Asano Hideyo, "On the phenomenon of natural refrigerant conversion in the industrial refrigeration sector in Japan", Euipment J, 44(7), pp.28~33 (2015)
- 노건상, "암모니아 대체 자연냉매를 이용하는 2단압축 1단팽창 냉동시스템의 성능예측", 한국가스학회지, 16(3), pp.42~47 (2012), 한국가스학회[DOI]
- 노건상, "자연 냉매를 이용하는 이원 냉동시스템의 성능 예측", 한국기계기술학회지, 12(3), pp.45~51 (2010), 한국기계기술학회[DOI]
- "Engineering Equation Solver, 10", fChart Software Inc. Engineering Equation Solver, ~ (2006)
- A. Messineo, "R744-R717 Cascade Refrigeration System: Performance Evaluation compared with a HFC Two-Stage System", Energy Procedia, 14, pp.56~65 (2012)
- W. Bingming, "Experimental investigation on the performance of NH3", CO2 cascade refrigeration system with twin-screw compressor, 2012, pp.1358~1365