Specific heat control of nanofluids: A critical review

Riazi, Hamed; Murphy, Thomas; Webber, Grant B.; Atkin, Rob; Tehrani, S. Saeed Mostafavi; Taylor, Robert A.

doi:10.1016/j.ijthermalsci.2016.03.024

Cited by 105 publications

(61 citation statements)

References 157 publications

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“…One of the actions gaining attention in the last years to increase the efficiency in the heat transfer and thermal storage systems currently present in these industrial processes is the use of salt-based nanofluids [11,12]. A nanofluid is a stable suspension of solid particles with nanometrical size used as HTF or TES material whose thermal properties have been enhanced [13].…”

Section: Introductionmentioning

confidence: 99%

Thermal energy storage of molten salt –based nanofluid containing nano-encapsulated metal alloy phase change materials

Navarrete

Mondragón

Wen

et al. 2019

Energy

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The availability of Thermal Energy Storage systems in Concentrated Solar Power plants makes them suitable to handle the gap between energy supply and power demand. Increasing the total thermal energy storage capacity of the Thermal Energy Storage materials used is of interest to improve their efficiency. In this work the thermal energy storage of the so called solar salt (60% NaNO3-40% KNO3) was improved by adding a phase change material composed of Al-Cu alloy nanoencapsulated with an aluminium oxide layer naturally formed when exposed to oxygen. The resistance of the oxide shell to thermal cycling up to 570ºC and its compatibility with the molten salt were proved. The specific heat and the total thermal energy storage were evaluated at different solid mass loads. Although the specific heat and thus the sensible heat storage decreases with solid content, the contribution of the phase change enthalpy and the latent heat storage can increase the total thermal energy storage up to a 17.8% at constant volume basis comparison. Besides, the thermal conductivity of the nanofluid was increased when adding the nanoparticles improving its heat transfer performance under some particular conditions.

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Section: Introductionmentioning

confidence: 99%

Thermal energy storage of molten salt –based nanofluid containing nano-encapsulated metal alloy phase change materials

Navarrete

Mondragón

Wen

et al. 2019

Energy

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“…Heat transfer enhancement was due to fluid flow on rough surface which happened due to an increase in the surface area and heat transfer coefficient. The change in turbulence pattern for roughness increased the heat transfer coefficient [45]. It was expected to having higher pumping power due to roughness effect because rough surface requires more power for flow but Figure 11 shows exceptional effect.…”

Section: Effects Of Nanofluid On Heat Transfer and Pumping Powermentioning

confidence: 97%

Investigation of thermal and hydrodynamic behaviour of Al2O3-water nanofluid through a rough parallel plate

Ehsan¹,

Salehin²,

Islam³

2017

Int. J. Automot. Mech. Eng.

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The implementation of nanofluid within a preferred volume fraction in base fluid is one of the innovative and inexpensive methods of enhancing the thermal and hydrodynamic behaviour in terms of increased heat transfer rate and reduced pumping power. In the present paper, forced convection heat transfer and pumping power were studied for a rough parallel plate subjected to constant heat flux under turbulent flow condition. The investigation was performed for a wide range of Reynolds number 10,000 to 30,000 with Al2O3 nanoparticles volume fraction 1% to 5% dispersed in base fluid water and three different rough surfaces (relative roughness: 0.001, 0.002, and 0.003) were considered. Heat transfer performance was substantially improved more by employing roughness at the wall of the boundary than the smooth parallel plate and also for the increased more volume fraction of nanofluid than base fluid water. Augmentation was found significant at higher surface roughness and volume fraction by the virtue of superior thermo-physical properties of nanofluid up to 36.9% and 26.1% for the rough surface. Roughness did not increase the pumping power as its effect was mitigated by the nanofluid. 2% volume fraction of Al2O3-water nanofluid on 0.003 relative roughness that showed the superior behaviour for heat transfer enhancement with minimum pumping power requirement.

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“…The present review will only address the experimental studies on the nanofluid thermophysical properties since until now, there are no universal theoretical or empirical models available in the literature for predicting exactly the nanofluid properties despite the substantial attempts made by researchers. This can be due to different mechanisms, playing a role in the performance of nanofluids, not taken into account in the models (see the reviews by [30,[33][34][35]).…”

Section: Thermophysical Propertiesmentioning

confidence: 99%

Ethylene- and Propylene-Glycol Based Nanofluids: A Litterature Review on Their Thermophysical Properties and Thermal Performances

Sekrani

Poncet

2018

Applied Sciences

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Nanofluids are considered a promising way to improve the heat transfer capability of base fluids. Water is the most commonly-used heat transfer fluid. However, in refrigeration systems, it may be necessary to mix water with either ethylene- or propylene-glycol to lower its freezing point and prevent from ice formation. In the same way, for car radiators or industrial heat exchangers, the boiling point of water can be pushed up by mixing it with glycol-based fluids. The increasing awareness of energy saving and industrial energy efficiency improvement results in the growing interest in ethylene- or propylene-glycol-based nanofluids for applications in various thermal systems. The present paper proposes an extensive review of the most recent and relevant experimental and numerical works on the thermophysical properties and performances of ethylene- or propylene-glycol-based nanofluids. Research perspectives are also provided with the long-term objective that these nanofluids be more widely considered in real industrial applications.

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Specific heat control of nanofluids: A critical review

Cited by 105 publications

References 157 publications

Thermal energy storage of molten salt –based nanofluid containing nano-encapsulated metal alloy phase change materials

Thermal energy storage of molten salt –based nanofluid containing nano-encapsulated metal alloy phase change materials

Investigation of thermal and hydrodynamic behaviour of Al2O3-water nanofluid through a rough parallel plate

Ethylene- and Propylene-Glycol Based Nanofluids: A Litterature Review on Their Thermophysical Properties and Thermal Performances

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