Cooling of electronic devices: Nanofluids contribution

Colangelo, Gianpiero; Favale, Ernani; Milanese, Marco; Risi, Arturo de; Laforgia, Domenico

doi:10.1016/j.applthermaleng.2017.08.042

Cited by 179 publications

(58 citation statements)

References 100 publications

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“…The method using extended surface area is commonly implemented to enhance thermal performance [1,2]. The usage of nanofluids to enhance a thermal system performance using nanoparticles has been conducted in several applications such as the cooling of electronic devices [3], a transparent parabolic trough collector [4], and a solar thermal collector [5]. Many works have investigated the flow and heat transfer characteristics of nanofluids in both experimental and numerical studies.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancement of TiO2/Water Nanofluid at Laminar and Turbulent Flows: A Numerical Approach for Evaluating the Effect of Nanoparticle Loadings

et al. 2018

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Titania-based nanofluid flowing inside a circular tube under the boundary condition of a horizontal uniformly heated wall was investigated numerically for both laminar and turbulent flows. In this work, an innovative numerical method using an Eulerian approach for the two-phase mixture model was used to simulate the flow and convective heat transfer characteristics. The effect of nanoparticle loading and Reynolds number on the flow and heat transfer characteristics was observed. The Reynolds number was 500 and 1200 for laminar flow, while for turbulent flow, the Reynolds number was varied in the range from 4000 to 14,000. A comparison with the established empirical correlations was made. The results clearly showed at the laminar and turbulent flows that the existing nanoparticles provided a considerable enhancement in the convective heat transfer. For laminar flow, the numerical results found that the enhancement in the convective heat transfer coefficient of nanofluids were 4.63, 11.47, and 20.20% for nanoparticle loadings of 0.24, 0.60, and 1.18 vol.%, respectively. On the other hand, for turbulent flow, the corresponding heat transfer increases were 4.04, 10.33, and 21.87%.

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Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancement of TiO2/Water Nanofluid at Laminar and Turbulent Flows: A Numerical Approach for Evaluating the Effect of Nanoparticle Loadings

et al. 2018

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“…The correlation covers a wide range of the process parameters (25 < Re < 1500, 0 < φ b < 10, 6 < Pr < 500) under the laminar flow condition. Figure 15 shows the comparison between the present Nu results along with the experiments from Haghighi et al [52] and the computed data from Salman et al [53] with the present proposed correlation (Equation [16]). The predicted values of Nu are in good agreement (variation of ±5%) with the computed values and the previous experimental results.…”

Section: Case 6: Water-based Nanofluid In Straight Tube With Constantmentioning

confidence: 78%

“…The predicted values of Nu are in good agreement (variation of ±5%) with the computed values and the previous experimental results. Nu = 0.4561Re 0.27 Pr 0.30 (16) Appl For the average Nu in a microtube with constant heat flux a new correlation (Equation 16) is proposed by fitting the data obtained from the numerical simulations. The correlation covers a wide range of the process parameters (25 < Re < 1500, 0 < < 10, 6 < Pr < 500) under the laminar flow condition.…”

Section: Case 6: Water-based Nanofluid In Straight Tube With Constantmentioning

confidence: 99%

“…Straight tube heat exchangers are the most common type of heat exchanger used in industrial processes due to ease of manufacturing and lower cost [1]. There are several experimental works available in the literature that study forced convective heat transfer in nanofluids as it continues to be a subject of growing importance in many applications [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A straight tube heat exchanger with laminar flow condition has a lower heat transfer coefficient (HTC) as compared to turbulent flow conditions.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Heat Transfer Enhancement for Laminar Nanofluids Flow

et al. 2018

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The laminar forced convection has been investigated for the flow of nanofluids in conventional straight tube (L = 5.34 m, dt = 10 mm) and straight microtube (L = 0.3 m, dt = 0.5 mm) under the constant temperature and constant heat flux conditions, separately. A wide range of the process parameters has been studied by varying three different type of base fluids including water, ethylene glycol and turbine oil with five different type of nanoparticles viz. Al2O3, TiO2, CuO, SiO2 and ZnO. Six different combinations of the geometries, base fluids and nanoparticle concentrations are considered in the present study. In addition to the single-phase model (SPH), the single-phase dispersion model (SPD) has been also used for effectiveness of the computed results. The results showed that Nusselt number (Nu) increases with increase in Reynolds number (Re). Further, the Nu considerably enhanced (up to 16% at volume fraction ϕ b = 4%, Re = 950) with increase in nanoparticle concentrations. Heat transfer correlations are developed for the flow of nanofluids in conventional straight tube and straight microtube over a wide range of process conditions (25 < Re < 1500, 0 < ϕ b < 10, 6 < Pr < 500) to enable a large number of engineering applications.

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“…The alteration is achieved by the introduction of nanoparticles into the water. Some other studies have been conducted on these aforementioned complexities in different thermal systems including heat exchangers [25] and electronic cooling [26], etc. However, no work has been presented on the usage of nanoparticles in the wet channel of a cross-flow Maisotsenko-based HMX for performance enhancement.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids

et al. 2018

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The incorporation of a Maisotsenko (M) Cycle into an indirect evaporative cooler has led to the achievement of sub-wet bulb temperature without any humidification, thus making it a possible green and sustainable alternative for handling the cooling load of a building. In this work, the thermal performance of a cross-flow heat and mass exchanger (HMX) is enhanced by the addition of nanoparticles in the wet channel because they significantly influence the heat and mass transfer characteristics of the base fluid. A governing model for the temperature and humidity variations of the HMX is numerically simulated. Initial benchmarking is achieved using water properties. Afterward, a comparative study is conducted using aluminum-oxide-, copper-oxide-, and titanium-oxide-based nanofluids. Enhancements of 24.2% in heat flux, 19.24% in wet bulb effectiveness, 7.04% in dew point effectiveness, 29.66% in cooling capacity, and 28.43% in energy efficiency ratio are observed by using alumina-based nanofluid as compared to water in the wet channel of the cross-flow HMX. Furthermore, a particle volume concentration of 1% and a particle diameter of 20nm are recommended for maximum performance.

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Cooling of electronic devices: Nanofluids contribution

Cited by 179 publications

References 100 publications

Heat Transfer Enhancement of TiO2/Water Nanofluid at Laminar and Turbulent Flows: A Numerical Approach for Evaluating the Effect of Nanoparticle Loadings

Heat Transfer Enhancement of TiO2/Water Nanofluid at Laminar and Turbulent Flows: A Numerical Approach for Evaluating the Effect of Nanoparticle Loadings

Numerical Study of Heat Transfer Enhancement for Laminar Nanofluids Flow

Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids

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