本研究使用銀奈米顆粒分散於純水中，以做為燒結毛細結構0.7mm厚的圓形熱管之工作流體。實驗中銀奈米顆粒之粒徑為10nm及35nm。奈米流體濃度分別為1ppm、10 ppm、100 ppm。實驗中量測奈米流體與純水充填於熱管之溫度分佈與溫差來呈現其性能，而研究中使用水溫40℃之恆溫水槽來做為熱管測試冷凝端，輸入功率為30W至70W。 實驗結果指出，在相同的充填率、輸入功率50W下，充填銀奈米流體熱管之熱阻比充填純水熱管降低了21%至55%。此外，當奈米流體為熱管之工作流體時，其最高操作功率為70W，比充填純水之熱管高出20W。本實驗也探討了銀奈米流體熱管連續運作12小時，結果顯示銀奈米流體熱管運作穩定，並重現溫差較去離子水熱管低之優點。 Dilute dispersion of silver nanoparticles in pure water was employed as the working fluid for conventional 0.7mm wick-thickness sintered circular heat pipe. The nanofluid used in present study is an aqueous solution of 10nm and 35nm diameter silver nanoparticles. The tested nanoparticle concentrations ranged from 1ppm, 10ppm and 100ppm, respectively. The experiment was performed to measure the temperature distribution and compare the heat pipe temperature difference using nanofluid and DI-water. The condenser section of the heat pipe was placed in a water-cooling jacket that was cooled by water supplied from a constant temperature bath maintained at 40 degrees centigrade. The input power are 30W-70W. As a result, at the same charge filling ratio, the measured nano-fluids filled heat pipe temperature distribution demonstrated that the thermal resistance decreased 21~55% compared to DI-water at an input power of 50W. In addition, the nanofluid as working medium in heat pipe reached to 70W and is higher than pure water about 20W. The study also investigates the thermal performance of silver nanofluid heat pipe under 12 hours testing. The result reappeared that the nanofluid heat pipe was stable and temperature difference was lower than DI-water filled in the test period.
