대한설비공학회:학술대회논문집 (Proceedings of the SAREK Conference)
- 대한설비공학회 2009년도 하계학술발표대회 논문집
- /
- Pages.1073-1078
- /
- 2009
핀칼라와 튜브의 간극에 따른 열교환기의 열전달 특성
Heat Transfer Characteristic of Finned-tube Heat Exchangers with Different Clearance between Fin Collar and Tube Surface
- Park, Young-Min (School of Mechanical Engineering, Pusan National University) ;
- Jeong, Young-Man (School of Mechanical Engineering, Pusan National University) ;
-
Lee, Jae-Keun
(School of Mechanical Engineering, Pusan National University)
;
- Park, Nae-Hyun (Digital Appliance Laboratory, LG Electronics)
- 발행 : 2009.06.25
초록
Finned-tube heat exchangers are often made with aluminum fins and copper tubes. Usually the contact between fin collar and tube surface for finned tube heat exchanger is secured by mechanical expansion of the tubes. The objective of the present study is to apprehend how much effect clearance has on the performance of heat exchanger. This effect is studied using an experimental approach. The thermal fluid measurements are made using a psychometric calorimeter. Frontal air velocity varies in the range from 1.0m/s to 3.0 m/s. The heat transfer rate of sample which has bigger clearance is only 27% compare with the other's in dry condition. In wet condition, its heat transfer rate is 78% compare with the other's.