| 摘要: |
| 基于分布参数模型建立了微通道平行流环路热管的稳态传热模型，并通过实验验证模型可行性，最大相对误差为10.5%。模拟研究分析了充液率、蒸发器和冷凝器高度差等因素对环路热管传热性能的影响。结果表明：环路热管的最佳充液率为80%~105.4%，换热量为1.27~1.36 kW；蒸发器和冷凝器的高度差从0.4 m增至1.0 m时，换热量约提升8.7%。同时，模型能够预测蒸发器流量分配的不均匀性及扁管内部的两相状态，使模拟结果更加精确，对微通道平行流环路热管的结构设计具有一定的参考价值。 |
| 关键词: 环路热管 分布参数模型 微通道 传热 实验验证 |
| DOI： |
| Received:November 12, 2021Revised:December 31, 2021 |
| 基金项目: |
|
| Heat Transfer Performance of Micro-channel Loop Heat Pipe Based on Distributed Parameter Model |
|
Tian Zhizheng, Han Chaoling, Chen Zhenqian
|
| (School of Energy and Environment, Southeast University) |
| Abstract: |
| A steady-state heat transfer model of a micro-channel parallel flow loop heat pipe was established based on the distributed parameter model. Model feasibility was verified experimentally, with a maximum relative error of 10.5%. The simulation study analyzed the influences of the filling ratios and the height difference between the evaporator and the condenser on the heat transfer performance of the loop heat pipe. The results showed that the optimal filling ratios of the loop heat pipe were 80%–105.4%, and the heat transfer capacity was 1.27–1.36 kW; when the height difference between the evaporator and condenser increased from 0.4 m to 1.0 m, the heat transfer capacity increased by approximately 8.7%. The model predicted the unevenness of the evaporator flow distribution and the two-phase state inside the flat tube, improving the accuracy of the simulation results. This study can be used as a reference for the structural design of micro-channel parallel flow loop heat pipes. |
| Key words: loop heat pipe distributed parameter model micro-channel heat transfer experimental validation |
