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NH3 냉동장치의 과열도 변화에 의한 성능 특성 연구 II
하옥남,권일욱,전상신,이승재,정송태,하경수,윤갑식,이종인,홍경한 대한설비공학회 2005 설비공학 논문집 Vol.17 No.4
Since the use of CFC and HCFC refrigerants are to be restricted due to the depletion of ozone layer, this experiment applies the NH3 gas to study the performance characteristics of NH3 refrigeration system by the superheat control for improving the energy efficiency. The experiments are carried out for the condensing pressure of refrigeration system from 1,500 kPa to 1,600 kPa and for degree of superheat from 0℃ to 10℃ at each condensing pressure. As a result of experiment, when the degree of superheat is 0℃ at each condensing pressure, the refrigeration system has the highest performance.
하옥남,이규태,하경수,정송태,김진현,홍성인,윤갑식,김양현,권일욱,이종인 대한설비공학회 2006 설비공학 논문집 Vol.18 No.5
Recently, production and use of Freon substances are restrained due to destruction of ozone layer and grobal warming. In this aspect of environmental problems, the best solution is to use the natural refrigerant such as ammonia. Thus, this study apply the NH3 and R22 to study the performance characteristic from the superheat control and compare the energy efficiency of two refrigerants from the high performance. The condensing pressure of refrigeration system is increased from 1,500kPa to 1,600kPa and degree of superheat is increased from 0 to 10℃ at each condensing pressure. As the result of experiment, when comparing the each COP, we knew the NH3 is suitable as the alternative refrigerant of the R22.
열교환기 구조 변화에 따른 NH₃와 R22의 성능특성연구
하옥남,하경수,이승재,정송태 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
Nowadays HCFCs refrigerant are restricted because it cause depletion of ozone layer. However, natural gases such as ammonia as an organic compound, propane and propylene as hydrocarbon are easy and cheap to obtain as well as environmental. Accordingly, this experiment apply the NH3 and R22 to study the performance characteristic from the superheat control and compare the energy efficiency of two refrigerants from the high performance. The condensing pressure of refrigeration system is increased from 15bar to 16bar and degree of superheat is increased from 0 to 10℃ at each condensing pressure. As the result of experiment, when comparing the each COP, we knew the NH₃ is suitable as the alternative refrigerant of the R22.
암모니아와 프레온을 사용한 냉동장치의 성능에 관한 연구
이승재(Seung-Jae Lee),하옥남(Ok-Nam Ha),정송태(Song-Tae Jeong),하경수(Kyeong-Soo Ha) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Nowadays HCFCs refrigerant are restricted because it cause depletion of ozone layer. However, natural gases such as ammonia as an organic compound, propane and propylene as hydrocarbon are easy and cheap to obtain as well as environmental. Accordingly, this experiment apply the NH3 and R22 to study the performance characteristic from the superheat control and compare the energy efficiency of two refrigerants from the high performance. The condensing pressure of refrigeration system is increased from 15bar to 16bar and degree of superheat is increased from 0 to 10℃ at each condensing pressure. As the result of experiment, when comparing the each COP, we knew the NH3 is suitable as the alternative refrigerant of the R22.