Enhancement of the performance of a double layered microchannel heatsink using PCM slurry and nanofluid coolants

Rajabifar, Bahram

doi:10.1016/j.ijheatmasstransfer.2015.05.007

Cited by 81 publications

(20 citation statements)

References 41 publications

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“…The effect of shell material of spherical shape encapsulated particles are assumed to be neglected and the particles melt instantaneously without temperature gradient formation inside the particle [12]. This paper is the continuation of our previous studies in this area and the readers are referred to our previous publications for details about assumption and relations for temperature dependent effective thermophysical properties of slurry [15,18,23]. A validated code [7,24] based on finite volume method and SIMPLE algorithm [25] has been employed as the numerical solver.…”

Section: Problem Definition and Methods Of Solutionmentioning

confidence: 99%

Flow and Heat Transfer in Micro Pin Fin Heat Sinks With Nano-Encapsulated Phase Change Materials

Rajabifar

Seyf

Zhang

et al. 2016

Journal of Heat Transfer

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In this paper, a 3D conjugated heat transfer model for Nano-Encapsulated Phase Change Materials are 2.27, 1.81, 1.56 times higher than the ones with base fluid, respectively. However, with increasing bottom wall temperature, the Nusselt number first increases then decreases. The former is due to higher heat transfer capability of coolant at temperatures over the melting range of PCM particles due to partial melting of nanoparticles in this range. While, the latter phenomena is due 1 Corresponding Author. 2to the lower capability of NEPCM particles and consequently coolant in absorbing heat at coolant temperatures higher than the temperature correspond to fully melted NEPCM. It was observed that NEPCM slurry has a drastic effect on Euler number, and with increasing volume fraction and decreasing inlet velocity, the Euler number increases accordingly.

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Section: Problem Definition and Methods Of Solutionmentioning

confidence: 99%

Flow and Heat Transfer in Micro Pin Fin Heat Sinks With Nano-Encapsulated Phase Change Materials

Rajabifar

Seyf

Zhang

et al. 2016

Journal of Heat Transfer

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“…The idea behind micro-channels is to use numerous separate channels, rather than a single channel to flow over the surface of the heat source and to increase the surface area of the heat sink that the fluid makes contact with. Rajabifar [92] adds an additional channel on top of the bottom channel, ultimately designing a double layered counter-flow micro-channel with nanofluids and PCM slurries as the coolants as shown in figure 8(c). With different types of fluid employed in the upper and the lower channel, the heat flux absorbed by the heat sink is the greatest when the nanofluids and the PCM slurries are deployed in the upper and lower channel, respectively.…”

Section: Heat Sink For Tegmentioning

confidence: 99%

Energy harvesting using thermoelectricity for IoT (Internet of Things) and E-skin sensors

et al. 2019

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With the increasing demand for Internet of Things (IoT) with integrated wireless sensor networks (WSNs), sustainable power supply and management have become important issues to be addressed. Thermal energy in forms of waste heat or metabolic heat is a promising source for reliably supplying power to electronic devices; for instance, thermoelectric power generators are widely being researched as they are able to convert thermal energy into electricity. This paper specifically looks over the application of thermoelectricity as a sustainable power source for IoT including WSNs. Also, we discuss a few thermoelectric systems capable of operating electronic skin (e-skin) sensors despite their low output power from body heat. For a more accurate analysis on body heat harvesting, models of the human thermoregulatory system have been investigated. In addition, some clever designs of heat sinks that can be integrated with thermoelectric systems have also been introduced. For their power management, the integration with a DC-DC converter is addressed to boost its low output voltage to a more usable level.

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“…B. Rajabifar modeled a double layer counter flow MCHS to study its hydraulic and thermal performance using DI water, nanofluid and NEPCM slurries as coolants. From the study, it was observed by combining the usage of NEPCM in lower layer and Nanofluids in upper layer as coolants with a 0.2/.04 volumetric concentration respectively, the cooling and flow performance of the MCHS system was enhanced [35]. A.…”

Section: Microelectronics Cooling Using Nano-pcms In Mchsmentioning

confidence: 99%

Review on Phase Change Materials with Nanoparticle in Engineering Applications

Kaviarasu¹,

Prakash²

2016

JESTR

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Phase change materials (PCMs) with their phenomenal phase changing behavior hold a key for many developments in renewable energy and engineering systems for sustainable future. PCM which can store and release heat energy over a temperature range has become an eminent candidate for many engineering applications that includes thermal, civil, electronics and textile. In modern days, Nano-PCMs have gained much attention of the engineers in utilizing them for thermal energy storage systems, for cooling microelectronic systems, for space heating or cooling in modern buildings and also in smart textiles for human comfort. Contribution of Nano-PCM based energy systems in energy savings and reduction of global gas emission is of interest now. This review provides an outlook of various types of PCM, choices of nanomaterial for incorporation and applications of nanomaterial incorporated PCMs. The most common types of PCM used are water, paraffin, hydrated salts and bio based PCM. Despite their high latent heat storage advantage, their low thermal property calls for the incorporation of nanomaterials. Nanomaterials with their high surface to volume ratio tune the thermal properties of the base PCM. Nanomaterials used for incorporation in PCM include Al, Cu, SiO2, TiO2, Carbon nanotubes (CNT), Carbon nanofibers (CNF), Al2O3, NaOH KOH etc.

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Enhancement of the performance of a double layered microchannel heatsink using PCM slurry and nanofluid coolants

Cited by 81 publications

References 41 publications

Flow and Heat Transfer in Micro Pin Fin Heat Sinks With Nano-Encapsulated Phase Change Materials

Flow and Heat Transfer in Micro Pin Fin Heat Sinks With Nano-Encapsulated Phase Change Materials

Energy harvesting using thermoelectricity for IoT (Internet of Things) and E-skin sensors

Review on Phase Change Materials with Nanoparticle in Engineering Applications

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