Journal of Applied Science and Engineering

Published by Tamkang University Press

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Operation of a Two-Phase Reverse Loop Thermosyphon

 2015

 Volume 18, Issue 3

Meng-Chang Tsai1, Shung-Wen Kang2, Heng-Yi Li1 and Wen-Fa Tsai1

1Institute of Nuclear Energy Research, Taoyuan, Taiwan 325, R.O.C.
2Department of Mechanical and Electro-Mechanical Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.

Received: March 20, 2015
Accepted: July 09, 2015
Publication Date: August 22, 2026

上傳圖片

Schematic of the two-phase reverse loop thermosyphon.

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation:  BibTeX | http://dx.doi.org/10.6180/jase.2015.18.3.06  

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A prototype two-phase reverse-loop thermosyphon (RLT) was fabricated to transport thermal energy downwards to a thermal storage tank. The effect the filling ratio exerted on the thermal performance of the RTL was investigated by conducting experiments that were performed by a range between 47% and 63%. The prototype device comprised an evaporator, a condenser, a reservoir (preheater), and pipes connecting each of the components. The heat transport height was 1500 mm from the evaporator to the bottom of the condenser. Methanol with a concentration of 95% was used as the working fluid. The temperature distribution, temperature difference between the evaporator and condenser, and thermal resistance of the thermosyphon were measured. In addition, a cyclic case, in which the power in coils was alternately switched on and off according to a square wave function was studied. The results indicated that the maximal thermal performance of the RLT occurred when the filling ratio was 60% and the input power was 660 W.

Keywords: Reverse-loop, Thermosyphon, Heat Transfer Downward, Cyclic Operation

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