| Title |
Heat Transfer Performance of Individual Rows in Fin-Tube Heat Exchangers |
| Authors |
권영철 ; 정지환 ; 장근선 ; 홍기수 ; 진심원 |
| Keywords |
Fin-tube heat exchanger ; 핀-관 열교환기 ; Heat transfer coefficient ; 열전달계수 ; Fin-connection ; 핀 연결 ; Compact heat exchanger ; 밀집 열교환기 |
| Abstract |
An experimental study is performed to examine the heat transfer performance of individual rows of fin-tube heat exchangers. The heat transfer performance is measured using an air-enthalpy type calorimeter. The examined heat exchangers consist of 7mm tube and fin patterns of them are slit and louver types. Equivalent fin spacings are 18fins per inch (fpi) for all samples, and the number of tube rows are two. In order to confirm that thermal boundary condition on fins of each row are the same, physically separated between two rows as well as connected heat exchangers are used. The frontal air velocity is varied from 0.7 to 2.5m/s. Heat transfer performance for each row is measured. It is observed that the heat transfer coefficient of the second row is smaller than that of the first row at low Reynolds number while larger at high Reynolds number. |