논문 국내 국내전문학술지(KCI급) 캐스케이드 열펌프의 저단 사이클 충전량 변화에 따른 성능 특성
- 학술지 구분 국내전문학술지(KCI급)
- 게재년월 2015-03
- 저자명 최종민
- 학술지명 한국지열에너지학회논문집
- 발행처명 한국지열에너지학회
- 발행국가 국내
- 논문언어 외국어
- 전체저자수 2
홈페이지논문 초록 (Abstract)
In this study, the optimization and performance characteristics of a cas cade heat pump system was analyzed with the variation oflow stage refrigerant charge amount. The cascade heat pump was designed and constructed with R134a and R410A as the refrigerant for hig h stage and low stage cycle, respectively. Experiments were conducted by varying the low stage charge amount and the performance characteristics of the cascade heat pump were studied. The refrigerant c harge amount of the low stage cycle was varied between the ranges of -15% and +10% of the optimum char ge amount. The performance variation experienced in the cascade heat pump due to the va riation of refrigerant charge amount shows greater effect in the undercharge regions than the overchar ge regions. COP reduction in the undercharge region is larger than the decrease in the overcharge reg ion. Some cycle variation such as powerconsumption and cycle pressure according to low stage refrigera nt charge amount showed different trends comparing with those according to high stage refrrgeran t charge amount. Therefore, the optimum charge amount of the cascade heat pump should be determined base d on the experimental data obtained by the variation of high and low stage refrigerant charge amount.