Stability of Nanofluids for Heat Pipe

Liu, Jian; Lu, Sheng; Qi, Chaorong; Zhang, Jun Hao; Yao, Shou Guang

doi:10.4028/www.scientific.net/msf.789.6

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The nanofluids stability is affected by the nanoparticles, base fluid, and dispersant. In order to improve the dispersibility of nanoparticles, the dispersant with appropriate concentration and type was added in nanofluids and then oscillated in the oscillator [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanofluids on Boiling Heat Transfer Performance

Yao

Teng

2019

Applied Sciences

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At present, there are many applications of nanofluids whose research results are fruitful. Nanofluids can enhance the critical heat flux, but the effect on boiling heat transfer performance still has disagreement. Base liquids with higher viscosity improve the boiling heat transfer performance of nanofluids. When the base liquid is a multicomponent solution, the relative movement between the different solutions enhances the microscopic movement of the nanoparticles due to the different evaporation order during the boiling process, so that the boiling heat transfer performance is enhanced. Compared with the thermal conductivity of the heated surface, the deposition of the low thermal conductivity nanoparticles reduces the heat dissipation rate of the heated surface and improves the wall superheat. Then the enhancement of the boiling heat transfer coefficient should be attributed to the thermal conductivity improvement of base fluid and the bubble disturbance resulted from the nanoparticle’s microscopic motion.

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Section: Introductionmentioning

confidence: 99%

Effect of Nanofluids on Boiling Heat Transfer Performance

Yao

Teng

2019

Applied Sciences

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“…In this study, the uniform design method and the two-step method 10 were used to analyze the effect of dispersant addition, pH value of the mixture and ultrasonic oscillation time on the stability of the nanofluids. The optimum preparation scheme was obtained so that the water-based Al 2 O 3 , SiO 2 and Al 2 O 3 -SiO 2 nanofluids which is mixed with a mass ratio of Al 2 O 3 to SiO 2 of 1: 1 with the average particle size of 30nm and 50nm respectively.…”

Section: A Preparation Of Nanofluidsmentioning

confidence: 99%

Effects of nanoparticle types and size on boiling feat transfer performance under different pressures

et al. 2018

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The experimental study on the boiling heat transfer performance and visualization of Al2O3-H2O, SiO2-H2O and Al2O3-SiO2-H2O nanofluids with 0.01% mass concentration were carried out. Alumina and silica nanoparticles with average particle diameters of 30 nm and 50 nm were selected. Al2O3-SiO2-H2O was the mixed aqueous nanofluids with a mass ratio of Al2O3 to SiO2 of 1: 1. The results show that the effect of particle size on the boiling heat transfer performance is small. For nanofluids with a particle size of 30 nm, the boiling heat transfer performance of Al2O3-H2O nanofluids is better than that of Al2O3-SiO2-H2O and SiO2-H2O nanofluids under the working pressure of 101 kPa. The critical heat fluxes increased by 7.9% and 22.1% respectively, and the maximum heat transfer coefficients increased by 18.3% and 32.6% respectively. The critical heat flux and the maximum heat transfer coefficient are 162.1 W/cm2 and 7.01W/(m2·K). The working pressure has an important effect on the boiling heat transfer performance of nanofluids. Compared with the boiling heat transfer performance under high pressure conditions, the boiling heat transfer performance of nanofluids is better under low pressure.

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