A novel heat pipe array with multi-evaporators and a shared horizontal exocentric tube condenser was developed and experimentally investigated on its thermal performance and reliability. This uniquely designed heat pipe array was expected to have extensive applications in the fields of solar heat collecting, multichip cooling, waste heat recovery systems, etc. This unique heat pipe array was fabricated with five evaporator tubes vertically arranged in parallel sharing an exocentric horizontal condenser tube. The test facility had been setup and experiments were conducted to investigate the thermal performance of the proposed heat pipe array systematically. Experimental results showed that the heat pipe array had a good thermal performance and an excellent operating stability. Furthermore, the uniquely designed configuration of an exocentric tube condenser and multi-evaporators not only improved vapor–liquid two-phase flow and phase-change heat transfer in the horizontal direction, but also extended the area of condenser and evaporator. The average thermal resistance decreased and the maximum heat transport capacity increased when increasing the length of evaporators. The experimental results also indicated that a maximum thermal performance of the heat pipe array appeared with an evaporator length of 270 mm at an inclination angle of 60 deg and operating temperature of 80°C. In addition, the minimum average thermal resistance and maximum heat transport capacity of this heat pipe array could achieve up to and 1098 W, respectively.
Experimental Investigation of Thermal Performance of a Unique Heat Pipe Array
Journal of Thermophysics and Heat Transfer ; 29 , 2 ; 346-352
01.04.2015
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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