| Title |
Data Reduction on the Air-side Heat Transfer Coefficients of Heat Exchangers under Dehumidifying Conditions |
| Authors |
김내현 ; 오왕규 ; 조진표 ; 박환영 ; 윤백 |
| Keywords |
Wet surface ; 습표면 ; Dehumidification ; 제습 ; Heat transfer coefficient ; 열전달계수 ; Data reduction ; 데이터 리덕션 ; Air-side ; 공기측 |
| Abstract |
Four different methods of reducing the heat transfer coefficients from experimental data under dehumidifying conditions are compared. The four methods consist of two different heat and mass transfer models and two different fin efficiency models. Data are obtained from two heat exchanger samples having plain fins or wave fins. Comparison of the data with the reduction methods revealed that the single potential heat and mass transfer model yielded the humidity independent heat transfer coefficients. Two different fin efficiency models－enthalpy model and humidity model－yielded approximately the same fin efficiencies and accordingly approximately the same heat transfer coefficients. The heat transfer coefficients under wet conditions were approximately the same as those of the dry conditions for the plain fin configuration. For the wave fin configuration, however, wet surface heat transfer coefficients were approximately 12% higher. The pressure drops of the wet surface were 10% to 45% larger than those of the dry surface. |