http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 한혁상(Hyok-Sang Han) (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
하천-충적대수층계의 강변여과수를 열원으로 이용하는 지하수 열펌프 시스템의 계절별 입구온도와 효율성 평가
한찬(Chan Hahn),전재수(Jae-soo jeon),윤운상(Yoon-Sang Yoon),한혁상(Hyok-Sang Han),한정상(Jeong-Sang Hahn) 한국지열·수열에너지학회 2007 한국지열에너지학회논문집 Vol.3 No.2
Unconsolidated and permeable alluvial deposit composed of sand and gravel is distributed along the fluvial plain at the Iryong study area. Previous studies on the area show that a single alluvial well can produce at least 1,650m3d-1 of bank infilterated shallow groundwater(BIGW) from the deposit. This study is aimed to evaluate and simulate the influence that seasonal variation of water levels and temperatures of the liver have an effect on those of BIGW under the pumping condition and also to compare seasonal variation of COPs when indirectly pumped BIGW or directly pumped surface water are used for a water to water heat pump system as an heat source and sink using 3 D flow and heat transport model of Feflow. The result shows that the magnitude influenced to water level of BIGW by fluctuation of river water level in summer and winter is about 48% and 75% of Nakdong river water level separately. Seasonal change of river water temperature is about 23.7 ℃, on other hand that of BIGW is only 3.8℃. The seasonal temperatures of BIGW are ranged from minimum 14.5℃ in cold winter(january) and maximum 18.3℃ in hot summer(July). It stands for that BIGW is a good source of heat energy for heating and cooling system owing to maintaining quite similar temperature(16℃) of background shallow groundwater. Average COPh in winter time and COPc in surnmer time of BIGW and surface water are estimated about 3.95, 3.5, and about 6.16 and 4.81 respectively. It clearly indicates that coefficient of performance of heat pump system using BIGW are higher than 12.9% in winter time and 28.1% in summer time in comparision with those of surface water.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
