摘要
针对大功率密闭机柜散热困难,研制了R22为传热介质的微通道铝扁管型分离式热管散热器,并搭建试验装置对其散热性能进行试验研究。试验结果表明:加热功率为2k W、环境温度为50℃时,密闭机柜内部温度≤70℃,满足机柜散热要求;工作温度范围内,散热器散热功率与内、外循环进风温差有关;外循环进风风速提高,散热器换热系数非线性增加;内循环进风风速提高,散热器换热系数线性增加。研究结果为热管技术在机柜散热方面的设计提供依据。
A separated heat pipe radiator with micro--channel flattened aluminum tubes using R22 as working fluid was proposed to solve the difficulty in cooling high power airtight cabinea Built an experimental facility and related experiment was designed to learn dissipation performance of heat pipe radiator. The results showed that the radiator could meet the heat dissipation demands of airtight cabinet： internal cabinet temperature was kept lower than 70℃ when dissipation power was 2kW and ambient temperature was 50℃. Within certain temperature range, heat dissipated power of radiator varied with difference of temperature between internal recycle inlet and external recycle inlet. Heat transfer coefficient of radiator was nonlinearly strengthened with the increase of inlet air speed of external recycle while linearly strengthened with the increase of inlet air speed of internal recycle. The results could provide a basis for designing heat pipe in the field of heat dissipation in the cabinets.
出处
《机械设计与制造》
北大核心
2015年第12期125-128,共4页
Machinery Design & Manufacture
关键词
热工学
机柜散热
分离式热管
微通道铝扁管
R22
Pyrology
Cabinet Heat Dissipation
Separated Heat Pipe
Micro Channel Flat Aluminum Tube
R22
