本研究以銀奈米流體為工作流體，充填於寬211μm×深217μm的溝槽式圓形熱管中，奈米流體其銀顆粒粒徑為10nm和35nm，所使用的濃度範圍從1(mg/l) 到100(mg/l)。在實驗中量測熱管的溫度分佈狀態並計算其熱阻，並和充填純水之結果作比較。冷凝端由水冷套件及溫度設定在40℃之恆溫水槽所組成。 在相同充填率下，由充填奈米流體熱管的溫度分佈顯示，在加熱功率30~60W下，其平均熱阻比充填純水減少30%~75%。此外熱阻會隨著銀奈米流體顆粒粒徑的增大與濃度的增加而降低。 Nanofluid is employed as working medium for conventional 211µm width×217µm depth grooved circular heat pipe. The nanofluid used in this study is an aqueous solution of 10nm and 35nm diameter silver nanoparticles. The experiment was performed to measure temperature distribution and compare thermal resistance of heat pipe with nanofluid and with DI-water. The tested concentrations of nanoparticles range from 1mg/l to 100mg/l. The condenser section of the heat pipe was attached to a heat sink, which was cooled by water supplied from a constant temperature bath maintained at 40℃. At a same charge volume, the measured temperature distribution of nanofluid filled heat pipe have demonstrated that the thermal resistance decreases 30%~75% compare to DI-water case at input power of 30~60W. The measured results also show that the thermal resistances of heat pipe decrease as an increase of the size and the concentrations of silver nanoparticles.
