Operational Characteristics Of A Reverse Thermosyphon Loop With a Large Pre-Heat Accumulator

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Title:	Operational Characteristics Of A Reverse Thermosyphon Loop With a Large Pre-Heat Accumulator
Authors:	Tsai, Meng-Chang;Li, Heng-Yi;Tsai, Wen-Fa;Kang, Shung-Wen
Keywords:	reverse-loop;thermosyphon;heat transfer downward;cyclic operation
Date:	2015-09-07
Issue Date:	2016-08-18 13:38:30 (UTC+8)
Abstract:	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 RLT 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.
Relation:	IX Conference “Minsk International Seminar “Heat Pipes, Heat Pumps, Refrigerators, Power Sources”會議論文集
Appears in Collections:	[Graduate Institute & Department of Mechanical and Electro-Mechanical Engineering] Proceeding

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