3D打印毛细芯与底座间隙对环路热管性能影响  

Effect of Clearances between 3D-Printed Wick and Heating Plate on Thermal Performance for LHP

作　　者：王丹 胡卓焕[1] 袁成伟 许佳寅 WANG Dan;HU Zhuohuan;YUAN Chengwei;XU Jiayin(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《轻工机械》2023年第6期34-41,共8页Light Industry Machinery

基　　金：国家自然科学基金(52105465)。

摘　　要：为抑制环路热管(loop heat pipe, LHP)蒸发器中的热泄漏,课题组通过改变3D打印复合毛细芯与加热底座之间的间隙来解决该问题。毛细芯与加热底座间分别选取0,1和2 mm 3种间隙组合方式组装环路热管,并通过实验研究间隙对环路热管传热性能的影响。结果表明:存在间隙时,启动时长均会因间隙的增大而延长;复合毛细芯蒸发层为200μm、吸液层为100μm、间隙为2 mm时,热泄漏的抑制最显著。此时,功率为180 W,壁面温度为96.7℃,传热系数为73 681 W/(m^(2)·K);而复合毛细芯蒸发层为100μm、吸液层为200μm时,间隙的增加对热泄漏的抑制效果不明显。综上,复合毛细芯对环路热管传热性能的影响可通过改变毛细芯与底座间隙距离来控制。In order to reduce the heat leakage in the evaporator and improve the heat performance of loop heat pipe(LHP),the clearance between the 3D-pringted composite wick and the heating plate was changed.LHP was assembled by three combined methods of the wick and the heating plate with no clearance,1 mm clearance and 2 mm clearance respectively,and their start-up and operating performance were experimentally studied.It was showed that the start-up time of the LHP with clearance will be prolonged due to the increase of the clearance.The suppression of heat leakage was most significant,when the clearance was 2 mm,the composite wick evaporation layer was 200μm,and transportation layer was 100μm.At the same time,the power was 180 W,the evaporator wall temperature was 96.7℃,and the heat transfer coefficient was 73681 W/(m^(2)·K).The increase in clearance had no significant inhibitory effect on heat leakage,while the composite wick evaporation layer of was 200μm,and the transportation layer of was 100μm.In conclusion,the influence of composite wick on the heat transfer performance of LHP can be controlled by changing of the clearance between the composite wick and the heating plate.

关 键 词：3D打印 复合毛细芯 环路热管 传热系数 热泄漏 

分 类 号：TK172.4[动力工程及工程热物理—热能工程] TH145[一般工业技术—材料科学与工程]