四氧化三铁纳米流体强化热管换热的实验研究

Experimental study on enhanced heat transfer of heat pipe with ferric oxide nanofluids

中文关键词: 重力热管  纳米流体  传热性能  质量浓度

英文关键词: gravity heat pipe  nanofluids  heat transfer performance  mass concentration

中文摘要:

      通过实验研究四氧化三铁（Fe3O4）纳米流体重力热管的传热性能。在不同输入功率、不同充液率、不同纳米流体质量浓度的工况下测试热管的外壁温度，再理论计算其等效对流传热系数、热阻。结果表明：当充液率为50%，输入功率为40W时，水基液重力热管和纳米流体重力热管都有最高的等效对流传热系数，并且纳米流体质量浓度为1%时，重力热管具有最高的等效对流传热系数5455.4 W.m-2.K-1，较水基液重力热管最多可增大79.1%。四氧化三铁纳米流体运用于重力热管可以有效减小其热阻、强化其传热性能。

英文摘要:

      The thermal conductivity of the ferroferric oxide (Fe3O4)nanofluids gravity heat pipe was studied experimentally. The outer wall temperature of the heat pipe was tested under different input powers，different liquid filling rates and different nanometer mass fluid concentrations，and then the equivalent heat transfer convection coefficient and thermal resistance were calculated theoretically. The results showed that when the liquid filling rate is 50% and the input power is 40 W，both the water-based gravity heat pipe and the nanofluids gravity heat pipe have the highest equivalent convective heat transfer coefficient，and when the mass concentration of the nanofluids is 1%，the gravity heat pipe has the highest equivalent convective heat transfer coefficient，5455.4 W.m-2.K-1，which can be increased by 79.1% compared with the water-based gravity heat pipe. The application of ferric oxide nanofluids to gravity heat pipe can effectively reduce their thermal resistance and enhance their heat transfer performance.