Comparison on the heat transfer performance (HTP) of copper screen mesh wick and metal foam inserted evaporator section of miniature loop thermosyphon is experimentally investigated. Porosity of both screen mesh wick and metal foams are fixed to be 63%. Experiments are conducted using DI water under vertical orientation for different heat loads (40 W–280 W) and filling ratios (FR = 20%, 30% and 40%). Results showed a decrease of 12.8% and 5.2% in thermal resistance and wall temperature respectively for the metal foam inserted evaporator. In addition 10.6% enhancement is noted for heat transfer coefficient at the evaporator region for 30% FR. Reduction of 4.6% in heat transfer irreversibility is also noted for metal foam inserted thermosyphon compared to screen mesh wick condition. Increase in interstitial heat transfer between the fibers of metal foam and larger pore size of metal foams resulted in higher permeability compared to screen mesh wick are responsible for the enhancement in the overall HTP of metal foam inserted thermosyphon. Based on the observed results, the use of metal foams inserted thermosyphon will be a better substitute for thermal management applications of electronic devices.

实验研究了铜筛网芯和金属泡沫插入的微型循环热虹吸蒸发器段的传热性能（HTP）比较。筛网芯和金属泡沫的孔隙率固定为 63%。针对不同热负荷 (40 W–280 W) 和填充率 (FR = 20%、30% 和 40%) 使用 DI 水在垂直方向进行实验。结果表明，金属泡沫嵌入蒸发器的热阻和壁温分别降低了 12.8% 和 5.2%。此外，对于 30% FR，蒸发器区域的传热系数提高了 10.6%。与筛网灯芯条件相比，插入金属泡沫的热虹吸管的传热不可逆性也降低了 4.6%。与筛网芯相比，金属泡沫纤维之间的间隙传热增加和金属泡沫的更大孔径导致更高的渗透性，这是金属泡沫插入热虹吸管的整体 HTP 增强的原因。根据观察到的结果，使用插入式热虹吸管的金属泡沫将更好地替代电子设备的热管理应用。