Heat Transfer Performance of a Two-Phase Closed Thermosyphon. | ||||
| MEJ- Mansoura Engineering Journal | ||||
| Article 21, Volume 25, Issue 2, June 2000, Page 35-45 PDF (353.31 K) | ||||
| Document Type: Research Studies | ||||
| DOI: 10.21608/bfemu.2021.158418 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
M. A. Shalaby  1; F. F. Araid1; Gamal Ibrahim Ahmed Sultan1; Mohamed Mahmoud Moustafa Awad2
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| 1Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Egypt, P. O.35516 | ||||
| 2Assistant Professor., Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt. | ||||
| Abstract | ||||
| An experimental investigation has been made in order to study the heat transfer performance of a two-phase closed thermosyphon tube. A smooth copper tube of total length 1500 mm and 21 nun inside diameter is used as a container of the thermosyphon. Each of the evaporator section and the condenser section has a length of 600 mm, while the remaining part of the thermosyphon tube is the adiabatic section. The working fluid used is R22. The effects of heat transfer rate (100 W ≤Q≤ 300 W), filling percentage (30≤%v+≤100%) and the inclination angle of the thermosyphon (22.5°≤θ≤90) are studied. It is found that, the optimum filling percentage and the best inclination angle values are 50% and 30°, respectively. The overall heat transfer coefficient ratio (U/U90) has been correlated in a dimensionless form as a function of Kutateladze number, filling ratio, inclination angle, and reduced pressure ratio. | ||||
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