摘要
建立了简单回路脉动热管稳定运行的传热模型,分析影响稳定传热热阻和传热功率的主要因素。结果显示,回路脉动热管的传热热阻可分为冷却热阻和循环热阻,其中冷却流速、冷却面积和冷却段长度占总长度的比例,是影响冷却热阻的主要因素;热源温度和充液率是影响循环热阻的主要因素;冷却温度对传热热阻影响很小。对空气冷却式回路脉动热管,提高冷却面积、冷却段长度比例和冷却流速,提高热源温度、降低冷却温度,提高充液率都可提高传热功率,其中前3个因素是提高传热功率的最佳途径。稳定运行时,传热功率的充液率范围为10%～80%,且随充液率增加,传热功率略有增加。
A heat transfer model of the simple loop pulsating heat pipe（PHP）was established to analyze the key influence factors for the thermal resistance and heat transfer rate of PHP.The results indicated that the thermal resistance of PHP included cooling thermal resistance and cycling thermal resistance.The velocity of cooling flow,cooling area,and the ratio of cooling area to heating area were the major factors affecting the cooling resistance,while the temperature of heat source and the charging ratio were the main factors affecting the cycling thermal resistance.The cooling temperature had less influence on thermal resistance.Heat transfer rate could be enhanced by the increase of cooling area,the ratio of cooling area to heating area,velocity of cooling flow,temperature of heat source,charging ratio,and reduction of cooling temperature.Enhancing the first three factors was the best way to increase heat transfer rate.The charging ratio varied from 10% to 80%,when the loop pulsating heat pipe was in the steady working condition,and the heat transfer rate increased a little as the charging ratio increased.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第11期2718-2725,共8页
CIESC Journal
基金
江苏省教育厅自然科学基金项目(02KJB470001)~~
关键词
回路脉动热管
稳定循环
传热模型
传热热阻
传热功率
loop pulsating heat pipes
steady circulation
heat transfer model
thermal resistance
heat transfer rate
