http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Performance of Underground Air-to-Water Heat Pump with Direct Contact Heat Exchanger
김영화(Kim, Y.H.),강연구(Kang, Y.K.),성문석(Sung, M.S.),유영선(Ryou, Y.S.),김종구(Kim, J.G.),장재경(Jang, J.K.) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
In Jeju, underground air is used for heating greenhouse and fertilizing natural CO₂ gas by suppling directly into greenhouse. But greenhouse heating method by direct supply of underground air has several problems as like low temperature below 20?C or high relative humidity over 90%. The underground air is inadequate in heating of crops such as mangos, oranges with the growing temperature over 20?C. Also if the relative humidity of greenhouse is kept with over 90%, diseases can strike almost of the crops. And also the ventilation loss becomes larger because the air pressure of inside greenhouse by direct supply of underground air is higher. In this study the heat pump system using underground air as heat source was developed and heating performance of the system was analyzed. Heating COP of the system was 2.5~5.0 and rejecting heat into greenhouse and extracting heat from underground air in this heat pump system were 46.5~31.4 kW, 34.9~20.9 kW respectively.