Experimental study on the application of paraffin slurry to high density electronic package cooling

Cho, K.; Choi, M. Y.

doi:10.1007/s002310050360

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…Therefore, the fluids studied herein do not exhibit penalties in pressure losses, which is advantageous in terms of performance in practical applications. Previously, pressure loss penalties of various magnitudes have been reported for both nanofluids and PCM fluids [3,5,12,21,22,29]. In addition, even decreased pressure losses have been reported for PCM fluids in some cases, but that phenomenon can be mostly attributed to turbulence suppression i.e.…”

Section: Friction Factors and Pressure Lossesmentioning

confidence: 99%

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Thermal properties and convective heat transfer of phase changing paraffin nanofluids

Mikkola

Puupponen

Saari

et al. 2017

International Journal of Thermal Sciences

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THERMAL PROPERTIES AND CONVECTIVE HEAT TRANSFER PERFORMANCE OF SOLID-LIQUID PHASE CHANGING PARAFFIN NANOFLUIDSWe aim to combine these two concepts for the first time by studying fluids containing nano-sized phase changing particles. In this study, the convective heat transfer performance and the thermal properties of solidliquid phase changing paraffin nanofluids are experimentally examined. Three water-based paraffin nanofluids with particle mass fractions of 5-10% are prepared and measured with an annular tube heat exchanger. The heat transfer measurements cover both laminar and turbulent regimes with Reynolds numbers varying in the range of 700-11000. The measurements also include pressure losses in order to study the suitability of the fluids for practical forced convection applications. In addition, the fluids are characterized: latent heats, specific heats, viscosities, thermal conductivities, densities and particle size distributions are all determined experimentally. In agreement with previous studies, the nanofluids are found to exhibit Nusselt numbers clearly higher than water when compared on the basis of equal Reynolds numbers. However, the differences in Prandtl numbers are shown to explain these deviations in Nusselt numbers. Indeed, the well-known Gnielinski correlation is able to explain the results quite adequately and thus, significant anomalies in the convection heat transfer caused by neither the melting of the phase change material nor the presence of the nanoparticles are observed. However, the nanofluids have systematically slightly higher Nusselt numbers than the correlation would predict, but the deviations are within the accuracy of the correlation (10%). When compared by using equal pumping powers, the nanofluids exhibit heat transfer performance poorer than that of water. The positive impact of the latent heat is outweighed by the negative effects of the increased viscosity and decreased specific heat.

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Section: Friction Factors and Pressure Lossesmentioning

confidence: 99%

“…In several studies, suspensions containing micro-sized PCM particles (typically 1-200 μm) have shown significant improvement in convective heat transfer performance [1][2][3][4][5]. However, the convection performance of such fluids containing nano-sized PCM particles has not been experimentally evaluated so far.…”

Section: Introductionmentioning

confidence: 99%

Thermal properties and convective heat transfer of phase changing paraffin nanofluids

Mikkola

Puupponen

Saari

et al. 2017

International Journal of Thermal Sciences

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“…To overcome this issue, nano‐PCMs of small particle size, large surface area, low leakage, uniform fluid flow, and suspension stability have gained attention as new TES materials for energy storage applications . Additionally, nano‐PCMs have volume and surface effect, are easily dispersed in fluid and steadily flow in slurry make them favourable in thermal energy storage and thermal management applications …”

Section: Introductionmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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Summary With advancement in technology—nanotechnology, various thermal energy storage (TES) materials have been invented and modified with promising thermal transport properties. Solid‐liquid phase change materials (PCMs) have been extensively used as TES materials for various energy applications due to their highly favourable thermal properties. The class of PCMs, organic phase change materials (OPCMs), has more potential and advantages over inorganic phase change materials (IPCMs), having high phase change enthalpy. However, OPCMs possess low thermal conductivity as well as density and suffer leakage during the melting phase. The encapsulation technologies (ie, micro and nano) of PCMs, with organic and inorganic materials, have a tendency to enhance the thermal conductivity, effective heat transfer, and leakage issues as TES materials. The encapsulation of PCMs involves several technologies to develop at both micro and nano levels, called micro‐encapsulated PCMs (micro‐PCM) and nano‐encapsulated PCMs (nano‐PCM), respectively. This study covers a wide range of preparation methods, thermal and morphological characteristics, stability, applications, and future perspective of micro‐/nano‐PCMs as TES materials. The potential applications, such as solar‐to‐thermal and electrical‐to‐thermal conversions, thermal management, building, textile, foam, medical industry of micro‐ and nano‐PCMs, are reviewed critically. Finally, this review paper highlights the emerging future research paths of micro‐/nano‐PCMs for thermal energy storage.

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Synthesis of nonionic polyurethanes with hydroxyl-terminated polybutadiene hydrophobic segments and their application in octadecane nanocapsules

2013

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Experimental study on the application of paraffin slurry to high density electronic package cooling

Cited by 9 publications

References 18 publications

Thermal properties and convective heat transfer of phase changing paraffin nanofluids

Thermal properties and convective heat transfer of phase changing paraffin nanofluids

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

Synthesis of nonionic polyurethanes with hydroxyl-terminated polybutadiene hydrophobic segments and their application in octadecane nanocapsules

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