氧化石墨烯纳米流体吸液芯热管传热特性  

Heat transfer characteristics of graphene oxide nanofluids suction core heat pipes

作　　者：金志浩[1] 陈艺帆 牟嘉辉 陈超[1] JIN Zhihao;CHEN Yifan;MU Jiahui;CHEN Chao(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning Province,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,辽宁沈阳110142

出　　处：《化学工程》2025年第3期46-50,82,共6页Chemical Engineering(China)

基　　金：国家自然科学基金委新疆联合基金资助项目(U190310)。

摘　　要：对于铜粉烧结吸液芯的普通热管和铜粉烧结吸液芯与微沟槽结合的复合热管(简称普通热管和复合热管),使用质量法测试2种热管吸液芯的毛细性能。相比于铜粉烧结吸液芯,复合吸液芯的抽取液体质量提高了13.4%。制备质量分数为0.05%、0.03%、0.01%的GO(氧化石墨烯)溶液和去离子水4种溶液作为工质,并分别注入到普通热管和复合热管中,充液量分别为1.4 mL和1.5 mL。研究热管在水平、25°和45°倾角放置时,不同的加热功率下对2种热管的传热性能的影响。研究结果表明:水平放置时,复合热管质量分数0.01%、0.03%、0.05%GO溶液在45 W时相较于去离子水热阻分别降低了57%、53.9%、64.7%,普通热管0.01%、0.03%GO溶液热阻降低了19.2%、22.4%,0.05%GO溶液则失效。以25°、45°倾角放置(加热段在上),发现随着倾角的增加,质量分数较高的溶液在普通热管内更容易失效,而在复合热管中仍可保持较好的传热性能。Ordinary heat pipes with sintered copper powder suction core and composite heat pipes with micro-grooves(referred to as ordinary heat pipes and composite heat pipes)were prepared.The capillary properties of the two kinds of heat pipes were tested by mass method.Compared with copper powder sintered suction core,the liquid quality of composite suction core was improved by 13.4%.Four kinds of GO(graphene oxide)solution and deionized water with mass fraction of 0.05%,0.03%and 0.01%were prepared as working medium,and injected into ordinary heat pipes and composite heat pipes with liquid filling amounts of 1.4 mL and 1.5 mL,respectively.The influence of different heating power on the heat transfer performance of two kinds of heat pipes at horizontal,25°and 45°angles was studied.The results show that when the heat pipe is placed horizontally,the thermal resistance of composite heat pipe 0.01%,0.03% and 0.05% GO solution decreases by 57%,53.9% and 64.7%,respectively,compared with that of deionize water thermal resistance at 45 W,while the thermal resistance of ordinary heat pipe 0.01% and 0.03% GO solution decreases by 19.2% and 22.4%,and the 0.05% GO solution fails.It is found that with the increase of the inclination angle,the solution with higher mass fraction is more likely to fail in the ordinary heat pipe,but can still maintain good heat transfer performance in the composite heat pipe.

关 键 词：氧化石墨烯 吸液芯 毛细性能 倾角 传热性能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]