설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제17권2호
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  • Pages.131-139
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  • 2005
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

나선 그루브형 열사이폰의 그루브 수의 변화에 대한 비등열전달 성능에 관한 연구

A Study on the Performance of Boiling Heat Transfer of Two-Phase Closed Thermosyphons with Various Helical Grooves

  • 한규일 (부경대학교 기계공학부) ;
  • 조동현 (대진대학교 컴퓨터응용기계설계공학과)
  • Han Kyu Il (School of Mechanical Engineering, Pukyong National University) ;
  • Cho Dong Hyun (Department of Mechanical Design Engineering, Daejin University)
  • 발행 : 2005.02.01
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초록

This study concerns the performance of boiling heat transfer in two-phase closed thermosyphons with various helical grooves. Distilled water, methanol, ethanol have been used as the working fluids. In the present work, a copper tube of the length of 1200 mm and 14.28 mm of inside diameter is used as the container of the thermosyphon. Each of the evaporator and the condenser section has a length of 550 mm, while the remaining part of the thermosyphon tube is adiabatic section. A experimental study was carried out for analyzing the Performances of having 50, 60, 70, 80 and 50 helical grooves. A Plain thermosyphon having the same inner and outer diameter as the grooved thermosyphons is also tested for comparison. The type of working fluid and the numbers of grooves of the thermosyphons with various helical grooves have been used as the experimental parameters. The experimental results have been assessed and compared with existing theories. The results show that the number of grooves and the type of working fluids are very important factors for the operation of thermosyphons. The helical grooved thermosyphons having 50 to 60 grooves in water, 60 to 70 grooves in methanol and ethanol shows the best heat boiling heat transfer coefficient.

키워드

참고문헌

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