Abstract
A pulsating heat pipe (PHP) contains a wickless design with aligned serpentine tube configuration whose simple structure offers a comparatively easy manufacturing capability. The bends with large curvature are often used for serpentine PHPs. This eventually results in a decline in effective contact surface area between evaporator/condenser and PHP circuitry, thereby impairing the benefit of the wickless design of a PHP. A novel thermal module featuring a 3-D configuration pulsating heat pipe, an evaporator, and a fin-and-tube condenser is proposed to tackle the high-flux application. Methanol is used as the working fluid with a filling ratio of around 60%. Test results indicate the thermal resistance of the proposed module varies from 0.148 K/W to 0.0595 K/W when the supplied power changes from 100 to 1000 W. The proposed thermal module can handle a supplied power up to 1 kW and the corresponding power or heat flux is much higher than any existing literatures.
Highlights
Based on the analysis of the foregoing discussions, there are two main reasons associated with the low heat transfer performance of the pulsating heat pipe (PHP) module
The first is associated with the high thermal resistance between evaporator and PHP (Revap-BE ), and the other is the loss of effective surface area due to the serpentine configuration
The proposed thermal module can handle a supplied heat input up to 1 kW with the thermal resistance varying from 0.148 K/W to 0.0595 K/W
Summary
Chih-Yung Tseng 1,3 , Ho-Meng Wu 2 , Shwin-Chung Wong 2 , Kai-Shing Yang 1 and Chi-Chuan Wang 3, *.
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