| Title |
Air-side Performance of Aluminum Heat Exchangers at Different Inclination Angles |
| Authors |
김도영(Do-Young Kim) ; 조진표(Jin-Pyo Cho) ; 김내현(Nae-Hyun Kim) ; 박내현(Nae-Hyun Park) ; 황준현(Jun-Hyun Hwang) |
| Keywords |
루버핀 ; 평행류형 알루미늄 열교환기 ; 평판관 ; 경사 Louver fin ; Brazed aluminum heat exchanger ; Flat tube ; Inclination |
| Abstract |
The effect of inclination angle on the heat transfer and pressure drop charac-teristics of the brazed aluminum heat exchangers is experimentally investigated. Three sam-ples having different fin pitches (1.25, 1.5 and 2.0mm) were tested. Results show that heat transfer coefficient is not affected by the inclination angle. However, the friction factor in-creases as the inclination angle increases with negligible difference between the forward and backward inclination. Both the heat transfer coefficient and the friction factor are the smallest at Fp=1.5mm, followed by Fp=2.0mm and 1.25mm. Possible explanation is provided consid-ering the louver layout. Comparison with existing correlations is also made. |