Experimental Investigation of Boiling and Condensation Heat Transfer of a Two Phase Closed Thermosyphon
- سال انتشار: 1384
- محل انتشار: ماهنامه بین المللی مهندسی، دوره: 18، شماره: 5
- کد COI اختصاصی: JR_IJE-18-5_001
- زبان مقاله: انگلیسی
- تعداد مشاهده: 213
نویسندگان
Chemical & Petroleum Engineering, University of Sistan & Baluchestan
Chemical & Petroleum Engineering, Ferdowsi University of Mashhad
Chemical & Petroleum Engineering, Ferdowsi University of Mashhad
چکیده
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 a thermosyphon with a copper tube having ۲۵ and ۳۲ mm inside and outside diameters. Distilled water was used as the working fluid. 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.کلیدواژه ها
Aspect ratio, Two, phase, Closed Thermosyphon, Boiling Heat transfer Coefficient, Condensation Heat Transfer Coefficientاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.