Thickness Influence of the Copper Powder Sintered Capillary Structure in the Thermal Performance of Heat Pipes

IF 0.6 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Acta Scientiarum-technology Pub Date : 2022-03-11 DOI:10.26678/ABCM.ENCIT2018.CIT18-0481
L. Krambeck, Guilherme Antonio Bartmeyer, Diógenes Oliveira de Souza, D. Fusão, P. H. Santos, T. A. Alves
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Abstract

A selection of capillary structure of sintered copper powder for heat pipes based on the experimental thermal performance was conducted. 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, low pores, and good thermal conductivity. The heat pipes were manufactured from a straight copper pipe with an external diameter of 9.45mm, an inner diameter of 7.75mm, and a length of 200mm. The capillary structure was made of sintered copper powder with three different thicknesses (2.125mm, 1.500mm, and 0.875mm). Distilled water was used as the working fluid. Each thickness was analyzed with four different filling ratios related to the evaporator volume: 60, 80, 100, and 120%. The condenser was cooled by forced convection of air, 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 horizontally under different low heat loads (from 5 up to 45W). The experimental results showed that all sintered heat pipes worked satisfactorily. However, Type #3 Heat Pipe with a filling ratio of 100% showed the best thermal performance.
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铜粉烧结毛细结构厚度对热管热性能的影响
基于实验热性能,对烧结铜粉热管毛细管结构进行了选择。由于其几何特性,所制造的热管可用于电子设备的冷却。热管是用来加强传热的,是基于相变的。所制备的烧结金属粉末结构具有毛细管泵送强度高、气孔少、导热性能好等特点。热管采用直铜管制造,外径9.45mm,内径7.75mm,长200mm。毛细管结构由三种不同厚度(2.125mm、1.500mm和0.875mm)的烧结铜粉制成。工作液采用蒸馏水。每种厚度用与蒸发器体积相关的四种不同填充比进行分析:60,80,100,120%。冷凝器采用空气强制对流冷却,绝热部分采用绝缘,蒸发器采用电阻器加热,并采用航空绝缘与环境绝缘。在不同低热负荷(5 ~ 45W)下对热管进行水平测试。实验结果表明,所有烧结热管工作良好。而填充率为100%的3型热管的热工性能最好。
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来源期刊
Acta Scientiarum-technology
Acta Scientiarum-technology 综合性期刊-综合性期刊
CiteScore
1.40
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: The journal publishes original articles in all areas of Technology, including: Engineerings, Physics, Chemistry, Mathematics, Statistics, Geosciences and Computation Sciences. To establish the public inscription of knowledge and its preservation; To publish results of research comprising ideas and new scientific suggestions; To publicize worldwide information and knowledge produced by the scientific community; To speech the process of scientific communication in Technology.
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