摘要
随着全球能源需求量的增加,能源的利用和回收显得尤为重要。针对市场上一些换热器存在成本高、换热效率较低等问题,将脉动热管与翅片相结合,对管内工质为充液率φ=50%无水乙醇的脉动热管换热器进行了试验研究,对比分析了脉动热管换热器在不同恒温水浴温度下的传热性能。试验结果表明:随着热源温度的升高,管内工质振荡效果越来越明显,振荡频率越来越快,脉动热管内热阻呈现先升高后减小的趋势,在热源温度为50℃时达到最高值,随后工质运行阻力减小,管内工质逐渐趋于稳定循环脉动,脉动热管的传热性能得到强化;热源温度越高,脉动热管的启动时间越短,使换热器能够迅速启动进行换热,热源80℃时脉动热管换热器换热效率达到54%。
With the increase of global energy demand,the utilization and recovery of energy has become particularly important.In response to the high cost and low heat transfer efficiency of some heat exchangers in the market,combing pulsating heat pipes with fins,an experimental study is conducted on a pulsating heat pipe heat exchanger with anhydrous ethanol which the filling rateφof the working fluid inside the pipes is 50%,and a comparative analysis is conducted on the heat transfer performance of pulsating heat pipe heat exchangers at different constant temperature water bath temperatures.The experimental results show that the oscillating effect of the working medium in the tube becomes more and more obvious,the oscillation frequency becomes faster and faster,and the internal thermal resistance of the pulsating heat pipe shows a trend of first increasing and then decreasing,as the temperature of the heat source increases.It reaches the highest value at a heat source temperature of 50℃,and then the operating resistance of the working fluid decreases.The working fluid inside the pipe gradually tends to stabilize and cycle pulsation,and the heat transfer performance of the pulsating heat pipe is enhanced.The higher the temperature of the heat source,the shorter the starting time of the pulsating heat pipe,allowing the heat exchanger to quickly start for heat exchange.When the heat source is 80℃,the heat exchange efficiency of the pulsating heat pipe heat exchanger reaches 54%.
作者
刘建红
刘栋
阎天海
曹欣
巨海娇
商福民
LIU Jianhong;LIU Dong;YAN Tianhai;CAO Xin;JU Haijiao;SHANG Fumin(School of Energy and Power Engineering,Changchun Institute of Technology,Changchun 130012,China)
出处
《长春工程学院学报（自然科学版）》
2023年第4期69-73,共5页
Journal of Changchun Institute of Technology：Natural Sciences Edition
基金
吉林省发改委产业技术研究与开发项目(2019C057-5)。
关键词
脉动热管
换热器
余热回收
强化传热
pulsating heat pipe
heat exchanger
waste heat recovery
heat transfer enhancement
