Heat transfer enhancement using nanofluids (Al2O3-H2O) in mini-channel heatsinks

Saeed, Muhammad; Kim, Man-Hoe

doi:10.1016/j.ijheatmasstransfer.2017.12.075

Cited by 124 publications

(27 citation statements)

References 36 publications

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“…This fact is due to the increased viscosity by adding nanoparticles in water for nanofluids. Saeed and Kim [44] reported the same trend for pressure drop in their study. They also reported that increasing the volumetric concentration of Al 2 O 3 -water nanofluids, pressure drop increases.…”

Section: Pressure Drop With Volumetric Flow Ratesupporting

confidence: 67%

“…The numerical data evaluated in this section using CuO-water nanofluids is following the similar trend of experimental data which was recorded by Jajja et al [1] in their study using water as a coolant. The result shows a percentage difference of 7.6%, 3.0%, and 1.4% for 0.5 mm, 1 mm, and 1.5 mm fin spacing, respectively, with Saeed and Kim [44] reported values at 1% volumetric concentration of Al 2 O 3 -water nanofluids at flow rate of 1 Lpm.…”

Section: Base Temperature With Flow Ratementioning

confidence: 62%

“…Jajja et al [1] in their experimental study on mini-channel heat sink achieved the minimum base temperature of 40.5 °C for 0.2 mm fin spacing. Saeed and Kim [43,44] evaluated the thermal hydraulic performance of mini-channel heat sinks numerically using water and Al 2 O 3 -water nanofluids.…”

Section: Introductionmentioning

confidence: 99%

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Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

et al. 2020

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Original scientific paper https://doi.org/10.2298/TSCI180722022AWater cooled heat sinks are becoming popular due to increased heat generation inside the microprocessor. Timely heat removal from microprocessor is the key factor for better performance and long life. Heat transfer enhancement is reached either by increasing the surface area density and/or by altering the base fluid properties. Nanoparticles emerge as a strong candidate to increase the thermal conductivity of base fluids. In this research, the thermal performance of mini-channel heat sinks for different fin spacing (0.2 mm, 0.5 mm, 1 mm, and 1.5 mm) was investigated numerically using CuO-water nanofluids with volumetric concentration of 1.5%. The numerical values computed were than compared with the literature and a close agreement is achieved. We recorded the minimum base temperature of chip to be 36.8 °C for 0.2 mm fin spacing heat sink. A reduction of 9.1% in base temperature was noticed using CuO-water nanofluids for 0.2 mm fin spacing as compared to previously experimental estimated value using water [1]. The drop percentage difference in pressure between water and CuO-water nanofluids was 2.2-13.1% for various fin spacing heat sinks. The percentage difference in thermal resistance between water and CuO-water nanofluids was computed 12.1% at maximum flow rate. We also observed uniform temperature distribution for all heat sinks.

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Section: Pressure Drop With Volumetric Flow Ratesupporting

confidence: 67%

Section: Base Temperature With Flow Ratementioning

confidence: 62%

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Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

et al. 2020

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“…Another way of reaching high heat transfer rates is to enhance the thermophysical properties of the working fluid. Nanofluids, which are prepared by dispersing nanosized particles into the base fluid to improve the thermophysical properties of the base fluid are thought to provide a higher heat transfer than traditional fluids . The combination of nanofluids and microchannels provides a higher heat transfer performance than traditional fluid systems .…”

Section: Introductionmentioning

confidence: 99%

“…Nanofluids, which are prepared by dispersing nanosized particles into the base fluid to improve the thermophysical properties of the base fluid are thought to provide a higher heat transfer than traditional fluids. 20,21 The combination of nanofluids and microchannels provides a higher heat transfer performance than traditional fluid systems. [22][23][24] Flow and heat transfer characteristics of Al 2 O 3 -water nanofluids in the microchannel with dimples and a protrusion surface were investigated by Li et al 25 Their results showed that the relative Fanning friction factor f/f 0 , Nusselt number Nu/Nu 0, and thermal performance increased with the increase of inlet velocity and volume fraction for nanofluids, and the integrated performance of the dimpled microchannel was better than that of dimpled combined with protrusioned ones for Al 2 O 3 -water nanofluids at the same conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of hydrodynamic and heat transfer performances of nanofluids in a fractal microchannel heat sink

Yan

2019

Heat Trans. Asian Res.

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Heat transfer and hydrodynamic performances for nanofluids, Al2O3‐water and SiO2‐water, are numerically investigated with different nanoparticles’ volume fractions and the initial velocities in a fractal microchannel heat sink. The fractal microchannel is 100 μm × 100 μm in the inlet cross‐section, and the length at the 0th level is 2000 μm. A constant heat flux of 500 kW/m2 was applied to the bottom wall of the fractal microchannel heat sink. The heat transfer and hydrodynamic performances of different cases are discussed in terms of the mean heat transfer coefficient, mean base temperature, pressure loss, thermal resistance, friction factor f/f0, and COP/COP0. Results indicate that increasing the initial velocity and nanoparticles’ volume fraction lead to an enhanced heat transfer at the expense of pressure loss. Al2O3‐water has a higher mean heat transfer coefficient and pressure drop than that of SiO2‐water, a lower f/f0, mean base temperature, thermal resistance, and COP/COP0. Ultimately, as compared to pure water, the heat transfer coefficients of 4% Al2O3‐water increased by 7.53%, 7.80%, 8.00%, 8.14%, 8.16%, and 8.30%, and the pressure drops increased by 32.09%, 31.41%, 30.81%, 30.05%, 29.21%, and 28.58%, respectively, corresponding to the initial velocities by 4, 5, 6, 7, 8 and 9 m/s.

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Geothermal and solar energy–based multigeneration system for a district

et al. 2019

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Summary In this study, parabolic trough collector with an integrated source of geothermal water is used with regenerative Rankine cycle with an open feedwater heater, an electrolyzer, and an absorption cooling system. The absorption fluids used in the solar collectors were Al2O3‐ and Fe2O3‐based nanofluids. Detailed energetic and exergetic analyses are done for the whole system including all the components. A comparative analysis of both the used working fluids is done and plotted against their different results. The parameters that are varied to change the output of the system are ambient temperature, solar irradiance, the percentage of nanofluids, the mass flow rate of the geothermal well, the temperature gradient of the geothermal well that had an effect on the net power produced, and the outlet temperature of the solar collector overall energetic and exergetic efficiencies. Other useful outputs by this domestic integrated multigeneration system are the heating of domestic water, space heating (maintaining the temperature at 40°C‐50°C), and desalination of seawater (flash distillation). The hydrogen production rate for both the fluids diverges with each other, both producing average from 0.00490 to 0.0567 g/s.

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Heat transfer enhancement using nanofluids (Al2O3-H2O) in mini-channel heatsinks

Cited by 124 publications

References 36 publications

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

Numerical investigation of hydrodynamic and heat transfer performances of nanofluids in a fractal microchannel heat sink

Geothermal and solar energy–based multigeneration system for a district

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