| Title |
Heat Transfer Characteristics of Fin-Tube Heat Exchanger using Two-Port Tube of Small Inner Diameter by Mechanical Expansion |
| Authors |
Sangmu Lee ; Byung-Duck Park |
| DOI |
http://dx.doi.org/10.6110/KJACR.2016.28.11.428 |
| Keywords |
열교환기 ; 연결세경관 ; 확관 ; 열전달계수 ; 압력강하 Heat exchanger ; Two-port tube of small inner diameter ; Tube expanding ; Heat transfer coefficient ; Pressure drop |
| Abstract |
The fin and tube heat exchanger using a two-port tube has in air-conditioner heat exchanger because heat transfer performance. This study investigates the feasibility of a fin and tube heat exchanger using two-port copper tube by mechanical expansion. The optimum size of the tube-expanding bullet for the heat exchanger using two-port tube was through numerical calculation. The heat exchanger using a two-port tube was fabricated by mechanical expansion, and the heat exchanger performance was evaluated condensation and evaporation experiments. Compared to the heat exchanger of a conventional circular tube, the pressure drop per unit length of the heat exchanger with a two-port tube decreased. Compared to the heat exchanger using a conventional circular tube, the overall heat transfer coefficient of heat exchanger with a two-port tube increased up to 13% in the case of condensation, and up to 25% in the case of evaporation. The two-port tube heat exchanger outperforms conventional heat exchanger for air conditioner with a inner grooved circular tube. |