| Title |
Heat Transfer and Friction Characteristics of Slit Fin and Tube Heat Exchangers in Wet Conditions |
| Authors |
장근선(Keun-Sun Chang) ; Thanh-Long Phan(Thanh-Long Phan) |
| Keywords |
핀-튜브 열교환기 ; 슬릿핀 ; 습표면 ; 열전달계수 ; 제습 Fin-tube heat exchanger ; Slit fin ; Wet condition ; Heat transfer coefficient ; Dehumidification |
| Abstract |
Water condensate accumulated on the surface of a fin-and-tube heat exchanger significantly affects its thermal and hydraulic performance. The purpose of this study is to investigate the effect of condensate retention on the air-side heat transfer performance and flow friction. Total 12 samples of slit and plate fin-and-tube heat exchangers with varying fin spacing and number of tube rows are tested under dry and wet conditions. The thermal fluid measurements are made using a psychometric calorimeter. Frontal air velocity varies in the range from 0.7m/s to 1.5m/s. Using the experimental data, presented are the heat transfer coefficients in terms of Colburn -factor and friction factor. |