中文摘要：

对用于热管式太阳能接收器的碱金属热管建立网络模型，并进行传热性能试验，模拟结果分别与集总参数法、热传导模型、文献和试验结果相比，吻合较好。网络模型考虑输入功率、管壁和吸液芯的厚度和导热系数，以及冷凝段长度等影响因素，可快速预测热管在不同功率下的工作温度以及热管结构参数对传热性能的影响。模拟得到热管吸液芯的导热系数对热管性能影响较大，热管管壁厚度和吸液芯厚度对热管性能的影响较小。

英文摘要：

A network model for alkali metal heat pipe used in heat pipe solar receiver is performed and the heat transfer performance of alkali metal heat pipes was experimented. Simulation results are compared with the literatures, and results by a transient lumped model, a heat conduction model and the experiments to validate the model. The network model can quickly predict heat pipe operating temperature under different powers as well as effects of structural parameters such as input power, thickness and thermal conductivity of wick and wall, and the condenser section length on heat transfer performance. Among physical parameters, thermal conductivity of wick has the greater impact, while thicknesses of wick and wall have the smaller impact on heat transfer performance of alkali metal heat pipe.