Dilute dispersion of silver nano-particles in pure water was employed as the working fluid for conventional 1mm wick-thickness sintered circular heat pipe. The nanofluid used in present study is an aqueous solution of 10 and 35nm diameter silver nano-particles.The experiment was performed to measure the temperature distribution and compare the heat pipe temperature difference using nanofluid and DI-water. The tested nano-particle concentrations ranged from 1, 10 and 100mg/l. The condenser section of the heat pipe was attached to a heat sink that was cooled by water supplied from a constant temperature bath maintained at 40°C.At a same charge volume, the measured nanofluids filled heat pipe temperature distribution demonstrated that the temperature difference decreased 0.56–0.65°C compared to DI-water at an input power of 30–50W. In addition, the nanofluid as working medium in heat pipe can up to 70W and is higher than pure water about 20W.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
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