대한설비공학회지:설비저널 (The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea)
- 제11권2호
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- Pages.1-9
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- 1982
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- 1229-6430(pISSN)
비틀림 테이프에 의한 이중관형 열교환기의 성능에 관한 연구
A Study on the Performance of a Shell Tube Heat- Exchanger with Twisted Tape
초록
Friction losses and heat transfer characteristics were studied experimentally for fully developed tubulent flow in tubes with twisted tape swirl generators. Data were obtained for pitch- to-diameter ratios from 8.10 to 25.71 with water under forced convection cool ins conditions. The experimental results of this and that of previous swirl flow investigation by Smithberg and Landis were compared. Nusselt number and friction data are combined in a constant pumping power comparision for swirl and straight flow, which indicates that improvement of 2.0 times in the best performance can be obtained with twisted tape-insert tube. A twisted tape-insert tube is recommended in the case of low temperature difference in heat-exchanger.
키워드