Heat Transfer Performance of a Two-Phase Closed Thermosyphon.

Authors

M. Shalaby, Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Egypt, P. O.35516Follow
F. Araid, Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Egypt, P. O.35516
Gamal Sultan, Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Egypt, P. O.35516Follow
Mohamed Awad, Assistant Professor., Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Follow

Corresponding Author

Shalaby, M.

Subject Area

Mechanical Power Engineering

Article Type

Original Study

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.

Recommended Citation

Shalaby, M.; Araid, F.; Sultan, Gamal; and Awad, Mohamed (2021) "Heat Transfer Performance of a Two-Phase Closed Thermosyphon.," Mansoura Engineering Journal: Vol. 25 : Iss. 2 , Article 9.
Available at: https://doi.org/10.21608/bfemu.2021.158418