Experimental study on thermal performance of water-based nano-PCM emulsion flow in multichannel heat sinks with parallel and divergent rectangular mini-channels

C. J. Ho, Shao Teng Hsu, Jer Huan Jang, Seyyede Fatemeh Hosseini, Wei Mon Yan

Research output: Contribution to journalArticle

Abstract

In this work, an experimental study is arranged to investigate the cooling efficacies of water-based nano-PCM emulsion flow in the multi-channel heat sinks with parallel and divergent rectangular mini-channels. N-eicosane particles with size of 130 nm are considered as the phase change material (PCM) nanoparticles. Two multi-channel heat sinks with eight parallel and divergent mini-channels are fabricated. The divergent channel has a divergent angle of 2.06°. The effects of different parameters including volumetric flow rate of working fluid (60 cm3/min < Q̇ < 600 cm3/min), heat flux (3.2 W/cm2 < qh′′ < 4.8 W/cm2), Reynolds number (100 < Re < 1000), and mass fraction of PCM nanoparticles (0% < ωPCM < 10%) on the dimensionless wall temperature, the Nusselt number, the cost of performance (COP), and the pressure drop are investigated. The experimental results show that the nano-PCM emulsion can improve heat transfer in both parallel and divergent mini-channel heat sinks as compared with the pure water. At Rebf = 965 and qh′′ = 3.21 W/cm2, the average Nusselt number in the parallel mini-channel heat sink improves about 15.2% by adding the PCM nanoparticles with mass fraction of 10% to the base fluid. This enhancement is up to 13.8% in the divergent mini-channel heat sink at Rebf = 295 and qh′′ = 3.21 W/cm2. Moreover, the divergent mini-channel heat sinks provide a higher Nusselt number along with lower pressure drop as compared with the parallel ones. Accordingly, the value of COP increases by diverging the mini-channel.

Original languageEnglish
Article number118861
JournalInternational Journal of Heat and Mass Transfer
Volume146
DOIs
Publication statusPublished - 2020 Jan

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phase change materials
Phase change materials
heat sinks
Heat sinks
Emulsions
emulsions
Water
Nusselt number
water
Nanoparticles
Pressure drop
pressure drop
Fluids
nanoparticles
Hot Temperature
Heat flux
Costs
Reynolds number
costs
Flow rate

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

@article{c4f11c5f6fda4582a4463086be21b5cf,
title = "Experimental study on thermal performance of water-based nano-PCM emulsion flow in multichannel heat sinks with parallel and divergent rectangular mini-channels",
abstract = "In this work, an experimental study is arranged to investigate the cooling efficacies of water-based nano-PCM emulsion flow in the multi-channel heat sinks with parallel and divergent rectangular mini-channels. N-eicosane particles with size of 130 nm are considered as the phase change material (PCM) nanoparticles. Two multi-channel heat sinks with eight parallel and divergent mini-channels are fabricated. The divergent channel has a divergent angle of 2.06°. The effects of different parameters including volumetric flow rate of working fluid (60 cm3/min < Q̇ < 600 cm3/min), heat flux (3.2 W/cm2 < qh′′ < 4.8 W/cm2), Reynolds number (100 < Re < 1000), and mass fraction of PCM nanoparticles (0{\%} < ωPCM < 10{\%}) on the dimensionless wall temperature, the Nusselt number, the cost of performance (COP), and the pressure drop are investigated. The experimental results show that the nano-PCM emulsion can improve heat transfer in both parallel and divergent mini-channel heat sinks as compared with the pure water. At Rebf = 965 and qh′′ = 3.21 W/cm2, the average Nusselt number in the parallel mini-channel heat sink improves about 15.2{\%} by adding the PCM nanoparticles with mass fraction of 10{\%} to the base fluid. This enhancement is up to 13.8{\%} in the divergent mini-channel heat sink at Rebf = 295 and qh′′ = 3.21 W/cm2. Moreover, the divergent mini-channel heat sinks provide a higher Nusselt number along with lower pressure drop as compared with the parallel ones. Accordingly, the value of COP increases by diverging the mini-channel.",
author = "Ho, {C. J.} and Hsu, {Shao Teng} and Jang, {Jer Huan} and Hosseini, {Seyyede Fatemeh} and Yan, {Wei Mon}",
year = "2020",
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language = "English",
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Experimental study on thermal performance of water-based nano-PCM emulsion flow in multichannel heat sinks with parallel and divergent rectangular mini-channels. / Ho, C. J.; Hsu, Shao Teng; Jang, Jer Huan; Hosseini, Seyyede Fatemeh; Yan, Wei Mon.

In: International Journal of Heat and Mass Transfer, Vol. 146, 118861, 01.2020.

Research output: Contribution to journalArticle

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AU - Ho, C. J.

AU - Hsu, Shao Teng

AU - Jang, Jer Huan

AU - Hosseini, Seyyede Fatemeh

AU - Yan, Wei Mon

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AB - In this work, an experimental study is arranged to investigate the cooling efficacies of water-based nano-PCM emulsion flow in the multi-channel heat sinks with parallel and divergent rectangular mini-channels. N-eicosane particles with size of 130 nm are considered as the phase change material (PCM) nanoparticles. Two multi-channel heat sinks with eight parallel and divergent mini-channels are fabricated. The divergent channel has a divergent angle of 2.06°. The effects of different parameters including volumetric flow rate of working fluid (60 cm3/min < Q̇ < 600 cm3/min), heat flux (3.2 W/cm2 < qh′′ < 4.8 W/cm2), Reynolds number (100 < Re < 1000), and mass fraction of PCM nanoparticles (0% < ωPCM < 10%) on the dimensionless wall temperature, the Nusselt number, the cost of performance (COP), and the pressure drop are investigated. The experimental results show that the nano-PCM emulsion can improve heat transfer in both parallel and divergent mini-channel heat sinks as compared with the pure water. At Rebf = 965 and qh′′ = 3.21 W/cm2, the average Nusselt number in the parallel mini-channel heat sink improves about 15.2% by adding the PCM nanoparticles with mass fraction of 10% to the base fluid. This enhancement is up to 13.8% in the divergent mini-channel heat sink at Rebf = 295 and qh′′ = 3.21 W/cm2. Moreover, the divergent mini-channel heat sinks provide a higher Nusselt number along with lower pressure drop as compared with the parallel ones. Accordingly, the value of COP increases by diverging the mini-channel.

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