| Title |
Evaluation of Air-side Heat Transfer and Friction Characteristics on Design Conditions of Evaporator |
| Keywords |
Slit fin-tube heat exchanger ; 슬릿휜-관 열교환기 ; Pressure drop ; 압력강하 ; Heat transfer coefficient ; 열전달계수 ; Wet surface ; 습표면 |
| Abstract |
An experimental study on the air-side pressure drop and heat transfer coefficient of slit fin-tube heat exchanger has been carried out. The data reduction methodology for air-side heat transfer coefficients in the literature is not based on a consistent approach. This paper focuses on new method of data reduction to obtain the air-side performance of fin-tube heat exchanger using R22 and recommends standard procedures for dry and wet surface heat transfer estimation in fin-tube heat exchanger having refrigerant on the tube-side. Results are presented as plots of friction-factor and Colburn-factor against Reynolds number based on the fin collar outside diameter and compared with previous studies. The data covers a range of refrigerant mass fluxes of 150～250kg/m2s with air flows at velocity ranges from 0.3 m/s to 0.8m/s. |