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ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
THICKNESS INFLUENCE OF THE COPPER POWDER SINTERED CAPILLARY STRUCTURE IN THE THERMAL PERFORMANCE OF HEAT PIPES
Submission Author:
Thiago Antonini Alves , PR , Brazil
Co-Authors:
Larissa Krambeck, Guilherme Antonio Bartmeyer, Davi Fusão, PAULO HENRIQUE DIAS DOS SANTOS
Presenter: Thiago Antonini Alves
doi://10.26678/ABCM.ENCIT2018.CIT18-0481
Abstract
An experimental evaluation of the thermal performance of heat pipes with different thickness of a sintered capillary structure was performed in this research. Due to the geometric characteristics, the manufactured heat pipes can be used in electronics cooling. The heat pipes are used to enhance the heat transfer and are based on phase change. The sintered metal powder structures have a high capillary pumping. The heat pipes were manufactured from a straight copper pipe with the external diameter of 9.45 mm, an inner diameter of 7.75 mm, and a total length of 200 mm. The capillary structure was made of sintered copper powder with three different thicknesses (2.125 mm, 1.500 mm, and 0.875 mm). Water was used as the working fluid and the best loading filling ratio of the evaporator volume was developed for each type of capillary structure. The condenser was cooled by air forced convection, the adiabatic section was insulated, and the evaporator was heated by an electrical resistor and was insulated from the environment with aeronautic insulation. The heat pipes were tested at the horizontal under different low heat loads (from 5 up to 40 W). The experimental results showed that all sintered heat pipes worked satisfactorily, however the Type #3 with a filling ratio of 80% showed the best thermal performance when compared with the others.
Keywords
sintered powder, thickness, Thermal performance, heat pipe, experimental
