Design and thermal performance of thermal diode based on the asymmetric flow resistance in vapor channel
Design and thermal performance of thermal diode based on the asymmetric flow resistance in vapor channel
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DOI：
10.1016/j.ijthermalsci.2023.108345
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发表时间：
2023
影响因子：
4.5
通讯作者：
J. Xiang;Wenqiang Yang;Hongyan Liao;Ping Li;Z. Chen;Jiale Huang
中科院分区：
文献类型：
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作者：
J. Xiang;Wenqiang Yang;Hongyan Liao;Ping Li;Z. Chen;Jiale Huang
为了降低热二极管的成本，提高其单向传热的可靠性，提出了一种特斯拉阀结构的热二极管，并对其热性能进行了实验研究。通过数值模拟研究了特斯拉蒸汽通道的结构参数（分支角α、通道深度、单元数和通道数n）与流体流动性能的关系。根据仿真结果，选择了α= 30°，d= 1.5 mm,n= 16和n= 4作为热二极管的气相通道参数。实验结果表明，在较宽的工作条件下，反向热阻大于正向热阻，表明所提出的热二极管具有良好的单向传热能力。当填充率为24%，加热功率为7 W时，反向热阻与正向热阻之比最大可达3.02左右。
To reduce the cost of the thermal diodes and increase its unidirectional heat transfer reliability, a thermal diode with tesla valve structure is proposed and its thermal performance is experimentally investigated. The relation between the structure parameters (including branch angleα, channel depthd, number of unitnand number of channelN) and the fluid flow performance of tesla vapor channel is studied by numerical simulation. According to the simulation results, the parameters ofα= 30°,d= 1.5 mm,n= 16 andN= 4 were chosen for the vapor channel in thermal diode. Experimental results show that the reverse thermal resistance is larger than the forward thermal resistance under the wide range of working conditions, indicating the good unidirectional heat transport capacity of the proposed thermal diode. The maximum ratio of reverse thermal resistance to forward thermal resistanceKreaches around 3.02 under the filling ratio of 24% and the heating power of 7 W.