| Title |
Heat Transfer Performance of the Duct with Various Cross Section in Heat Exchanger |
| Authors |
김응복(Eung-Bok Kim0 ; 한민섭(Minsub Han) ; 김내현(Nae-Hyun Kim) ; 원태연(Tae-Yeon Won) |
| Keywords |
전열교환기 ; 누셀트 수 ; 덕트 ; 삼각형 ; 물결형 Enthalpy Exchanger ; Nusselt Number ; Duct ; Triangle ; Wave |
| Abstract |
It is a critical task to keep the ventilation system working in a proper and efficient manner in large multi-storey buildings, and the enthalpy exchanger is becoming an increasingly important part of the ventilation system by playing the function of channeling heat and moisture. We present a computational study on the heat transfer performance of the cross-flow enthalpy exchanger, which is in large use for residential buildings. The ducts are considered whose cross- sectional shapes resemble triangle and longitudinal centerline a cosine wave. It is shown that, as the cross-sectional shape departs from triangle, the heat transfer performance of the duct tends to deteriorate. Also, applying the wave-like shape to the longitudinal centerline of the duct increases the rate of heat transfer and the applied pressure-gradient at the same time. The origin of the performance variations in the cases considered are quantitatively analyzed and discussed. |