Particle size effect on heat transfer performance in an oscillating heat pipe

Ji, Yulong; Ma, Hongbin; Su, Fengmin; Wang, Guoyou

doi:10.1016/j.expthermflusci.2011.01.007

Cited by 111 publications

(23 citation statements)

References 16 publications

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“…There is a lack of reported research on hybrid combined models for the effective thermal conductivity that takes into consideration all major mechanisms plus other important recognized effects like particle settling down time [75][76][77][78], temperature [79], pH [80][81][82], dispersion [83] and the particle size effect on surface contact of liquid/particle interaction [41,[84][85][86]. However, the following models are valuable because they included some of these effects.…”

Section: Hybrid Model and Other Effectsmentioning

confidence: 99%

A Review of Thermal Conductivity Models for Nanofluids

Aybar

Sharifpur

Azizian

et al. 2015

Heat Transfer Engineering

209

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Section: Hybrid Model and Other Effectsmentioning

confidence: 99%

A Review of Thermal Conductivity Models for Nanofluids

Aybar

Sharifpur

Azizian

et al. 2015

Heat Transfer Engineering

209

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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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“…A wide range of nanoparticles such as Ag [15][16][17][18][19][20], diamond [21], Au [22], Ti [23][24][25], Cu [26], Al 2 O 3 [27][28][29][30][31], CuO [26,28,[30][31][32], TiO 2 [30,31], SiO [26], Fe 2 O 3 /Fe 3 O 4 [33,34], CNT [35,36] have been used in various base fluids which were mostly water and alcohol. The effect of nanoparticles characteristics (such as type [26,30], particle size [16,22,26,27,30] and concentration in the base fluid [16,22,24,26,30,34]), as well as heat pipe design parameters [such as filling ratio (F.R.) [24], aspect ratio, inclination angle [24], wick structure, operating pressure [26], and length of various sections] and operational conditions (such as input power to the evaporator) on the thermal performance of heat pipes were investigated in these studies.…”

mentioning

confidence: 99%

Performance enhancement of an experimental air conditioning system by using TiO2/methanol nanofluid in heat pipe heat exchangers

et al. 2015

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Specific enthalpy of desired conditioned air (at 18 °C and 55 % RH) HPHX Heat pipe heat exchanger HVAC Heating, ventilation, and air conditioninġ m Mass flow rate of air passing through the condenseṙ m min Minimum of mass flow rates between air streams in pre-cooling and reheating sections q act Actual heat transfer rate q max Maximum heat transfer rate RH Relative humidity RH e,i Relative humidity of inlet air to the HPHX evaporator S e Energy saving in evaporator section S c Energy saving in condenser section S t Total energy saving T c,i Temperature of inlet air to the HPHX condenser T C,d Temperature of desired outlet air from the AC system (at 9 °C and 100 % RH) T c,o Temperature of outlet air from the HPHX condenser T e,i Temperature of inlet air to the HPHX evaporator T e,o Temperature of outlet air from the HPHX evaporator ε Effectiveness of HPHX δ Uncertainty

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Particle size effect on heat transfer performance in an oscillating heat pipe

Cited by 111 publications

References 16 publications

A Review of Thermal Conductivity Models for Nanofluids

A Review of Thermal Conductivity Models for Nanofluids

Thermal performance of screen mesh heat pipe with Al2O3 nanofluid

Performance enhancement of an experimental air conditioning system by using TiO2/methanol nanofluid in heat pipe heat exchangers

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