Experimental Investigation of Boiling and Condensation Heat Transfer of a two Phase Closed Thermosyphon
Publish Year: 1384
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-18-1_004
تاریخ نمایه سازی: 20 اسفند 1400
Abstract:
In this paper the heat transfer characteristics of a two-phase closed thermosyphon over a wide range of heat transfer rates, system pressure, aspect ratios and filling ratios were studied. The experiments focused on the boiling and condensation heat transfer characteristics of the thermosyphon. The experimental boiling and condensation heat transfer coefficients inside the thermosyphon were compared with the existing correlations. A good agreement between the experimental results of condensation heat transfer of the thermosyphon and Nusselt’s correlation was obtained. In addition, the optimal working fluid filling and the overall heat transfer coefficient were evaluated for practical operation. Finally, according to poor agreement between the experimental results of boiling heat transfer coefficient and existing correlations, the working conditions were analyzed and a new practical formula (correlation) was presented. The new correlation can be used to predict boiling heat transfer coefficient generally.
Keywords:
Aspect ratio , Two , phase closed thermosyphon , Boiling Heat transfer Coefficient , Condensation Heat Transfer Coefficient
Authors
M. Khoshnoodi
Chemical & Petroleum Engineering, University of Sistan & Baluchestan
M.H. Kalaei
Chemical & Petroleum Engineering, Ferdowsi University of Mashhad
S.H. Noie
Chemical & Petroleum Engineering, Ferdowsi University of Mashhad