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http://dx.doi.org/10.3795/KSME-B.2004.28.12.1475

Performance Characteristics of a Loop Thermosyphon for Heat Source Cooling  

Choi, Du-Sung (한국과학기술원 기계공학과)
Song, Tae-Ho (한국과학기술원 대학원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.12, 2004 , pp. 1475-1483 More about this Journal
Abstract
Loop thermosyphon(LTS) has many good characteristics such as low thermal resistance, no power consumption, noiseless operation and small size. To investigate the overall performance of LTS, we have performed various experiments varying three parameters: input power of the heater, working fluid(water, ethanol, FC3283) and filling ratio of the working fluid. At a combination of these parameters, temperature measurements are made at many locations of the LTS. The temperature difference between the evaporator and the condenser is used to obtain the thermal resistance. In addition, flow visualization using a high speed camera is carried out. The thermal resistance is not constant. It is lower at higher input power, which is one of the distinct merits of LTS. Flow instabilities are frequently observed when changing the working fluid, the input power and the filling ratio. The results show that the LTS can be readily put into practical use. Future practical application in electronic cooling is recommended.
Keywords
Closed Type Two-Phase Natural Circulation Loop; CPU Cooling; Filling Ratio; Flow Instability; LTS; Thermal Resistance; Oscillating Capillary Tube Heat Pipe;
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