인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
개인구독
소속 기관이 없으신 경우, 개인 정기구독을 하시면 저렴하게
논문을 무제한 열람 이용할 수 있어요.
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
The present study investigated the performance evaluation of heat exchangers for heat pump evaporators under frosting conditions. The plate and slit fin-and-tube heat exchangers with a tube diameter of 7㎜ were used. The evaporator which was 400×252×12.7 ㎜ (H×W×D) was tested for two different types of plate fins and slit fins with the pitch of 1.5㎜. The experimental parameters were face velocity and number of rows. The pressure drop of the slit fin-and-tube heat exchanger was increased while the heat transfer rate was decreased as the frost increased. This is because as the frost clings to the slits, the enhancement of heat transfer of the slit fin-and-tube heat exchanger decreased due to the decrease of the leading edge effect and the mixing effect of air. From the flow and heat transfer characteristics, the HGR was considered as an index to evaluate the performance of the heat exchanger. The HGR was over 1 under frosting conditions and it was concluded that it was a proper index for the capacity of the heat exchanger.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
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UCI(KEPA) : I410-ECN-0101-2009-550-018670497