Experimental investigation of nanofluids on sintered heat pipe thermal performance

Kang, Shung‐Wen; Wei, Wei-Chiang; Tsai, Sheng-Hong; Huang, Chih-Fang

doi:10.1016/j.applthermaleng.2008.05.010

Cited by 174 publications

(69 citation statements)

References 22 publications

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“…The thermal performance investigation of heat pipe indicated that nanofluids containing silver or titanium nanoparticles could be used as an efficient cooling fluid for devices with high energy density. For a silver nanofluid, the temperature difference decreased 0.56-0.65℃ compared to water at an input power of 30-50 W [51]. For the heat pipe with titanium nanoparticles at a volume concentration of 0.10%, the thermal efficiency is 10.60% higher than that with the based working fluid [52].…”

Section: Electronic Applicationsmentioning

confidence: 87%

Nanofluids

Wang¹,

Xie²,

Che³

2012

Smart Nanoparticles Technology

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Section: Electronic Applicationsmentioning

confidence: 87%

Nanofluids

Wang¹,

Xie²,

Che³

2012

Smart Nanoparticles Technology

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“…The important finding from these results is that the increment in viscosity of the NF compared with the base fluid is more than two times higher than the thermal conductivity increment of the NF. [16] Screenmesh Water based alomina (30 nm &2.4 wt.%) + Kang et al [17] Sintered Water based silver (10 nm & 0.01 wt.%) + Liu et al [18] Grooved Water based copper oxide (50 nm & 1.0 wt.%) + Kang et al [19] Grooved Water based silver Ag-water (35 nm, 0.01 wt.%) + Ji et al [20] Oscillating …”

Section: Working Fluidmentioning

confidence: 99%

Thermal performance of screen mesh heat pipe with Al2O3 nanofluid

Ghanbarpour

Nikkam

Khodabandeh

et al. 2015

Experimental Thermal and Fluid Science

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a b s t r a c tThis study presents the effect of Al 2 O 3 nanofluid (NF) on thermal performance of screen mesh heat pipe in cooling applications. Three cylindrical copper heat pipes of 200 mm length and 6.35 mm outer diameter containing two layers of screen mesh were fabricated and tested with distilled water and water based Al 2 O 3 NF with mass concentrations of 5% and 10% as working fluids. To study the effect of NF on the heat pipes thermal performance, the heat input is increased and then decreased consecutively and the heat pipes surface temperatures are measured at steady state conditions. Results show that using 5 wt.% of Al 2 O 3 NF improves the thermal performance of the heat pipe for increasing and decreasing heat fluxes compared with distilled water, while utilizing 10 wt.% of Al 2 O 3 NF deteriorates the heat pipe thermal performance. For heat pipe with 5 wt.% Al 2 O 3 NF the reduction in thermal resistance of the heat pipe is found to be between 6% and 24% for increasing and between 20% and 55% for decreasing heat fluxes, while the thermal resistance increased between 187% and 206% for increasing and between 155% and 175% for decreasing steps in heat pipe with 10 wt.% of Al 2 O 3 NF.

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“…Other researchers have done similar experiments using nanofluid in heat pipes and thermosyphons (Naphon et al 2008(Naphon et al , 2009Noie et al 2009;Kang et al 2009;Qu et al 2010;Parametthanuwat et al 2010;Teng et al 2010;Liu and Zhu 2011;. Shafahi et al (2010) used a twodimensional analysis to study the thermal performance of a cylindrical heat pipe utilizing Al 2 O 3 , TiO 2 and CuO nanofluids as the working fluids.…”

Section: Introductionmentioning

confidence: 99%

Investigation of heat pipe heat exchanger effectiveness and energy saving in air conditioning systems using silver nanofluid

Firouzfar

Soltanieh

Noie

et al. 2012

Int. J. Environ. Sci. Technol.

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The present study attempts to use the methanol-silver nanofluid filled heat pipe heat exchanger and compares the effectiveness as well as the energy saving with pure methanol. A heat pipe heat exchanger has been tested in a test rig under steady-state conditions. The lengths of both the evaporator and the condenser sections of the heat exchanger were 700 mm, and its central adiabatic section had a length of 160 mm. The heat exchanger had 36 plate finned copper thermosyphons arranged in three rows. The inlet air temperature across the evaporator section was varied in the range of 33-43°C while the inlet air temperature to the condenser section was nearly constant to be 13°C. First, pure methanol was used as the working fluid with a fill ratio of 50 % of the evaporator section length, and then dilute dispersion of silver nanoparticles in methanol was employed as the working fluid. The nanofluid used in the present study is 20 nm diameter silver nanoparticles. The experiments were performed to compare the heat pipe heat exchanger effectiveness and energy saving, using nanofluid and pure methanol. The inlet air relative humidity across the evaporator section was varied between 35 and 80 %. The sensible effectiveness of the heat pipe heat exchanger obtained from experiments varied about 5-22 % for pure methanol and 9-32 % for methanol-silver nanofluid. Based on these experimental results, using methanol-silver nanofluid leads to energy saving around 8.8-31.5 % for cooling and 18-100 % for reheating the supply air stream in an air conditioning system.

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Experimental investigation of nanofluids on sintered heat pipe thermal performance

Cited by 174 publications

References 22 publications

Nanofluids

Nanofluids

Thermal performance of screen mesh heat pipe with Al2O3 nanofluid

Investigation of heat pipe heat exchanger effectiveness and energy saving in air conditioning systems using silver nanofluid

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