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설치 각도와 입구 습도가 알루미늄 증발기의 공기측 성능에 미치는 영향
김만회(Man-Hoe Kim),Sumin Song,C.W. Bullard,오상경(Sang Kyoung Oh) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
The effect of air inlet humidity condition on the air-side heat transfer and pressure drop characteristics for an inclined brazed aluminum heat exchanger has been investigated experimentally. For a heat exchanger with a louver angle of 27˚, fin pitch of 2.1 ㎜ and flow depth of 27.9 ㎜, a series of tests are conducted for the air-side Reynolds numbers of 80-400, with variation of inlet humidity condition. The heat transfer data are obtained for wet condition only and the pressure drop data are measured for both dry and wet conditions. The inlet air temperature and relative humidity range are 12℃ and 60-90 %, respectively. The inclination angles (θ) from the vertical position are 0˚, 14˚, 45˚, and 67˚ clockwise (leeward direction). The inclination angles affect moderately the sensible heat transfer coefficient for wet condition, and the pressure drops for both dry and wet conditions increase systematically with the inclination angle. The heat transfer and pressure drop characteristics under wet condition are not influenced substantially by the air inlet humidity for θ ≤ 45˚. The effect of the louver directions at the inlet and outlet of the inclined heat exchanger on the performance is also addressed.