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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

Experimental study of natural convection and phase transition coupling heat sink with temperature uniformity

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.022222
pages 6409-6421

Sinopsis

In order to solve the heat dissipation of large size and high power electronic equipment and increase the temperature uniformity between electronic components with different power, a novel heat sink with phase transition in the circulation loop was designed and fabricated based on the high heat transfer capacity and excellent temperature uniformity of phase transition. The heat sink was consisted of evaporation substrate, condensation substrate, capillary pump, reservoir and aluminum fins. The thermal performance of the heat sink under natural convection was tested and analyzed for R245fa under different working conditions. Experimental results revealed that the heat sink possesses an excellent temperature uniformity and outstanding thermal performance. The filling ratio, heat input and inclination angle exerted significant influence on the performance of heat sink. The heat sink depicted a rapid response to variable heat input and operated stably without obvious temperature oscillation. The temperature difference can be decreased to 2.9°C at the heat input of 250W and the thermal resistance can be as small as 0.0082K/W. In particular, the increases of heat input of capillary pump can enhance the heat transfer capacity of heat sink at high filling ratio.