Enhancement of the critical heat flux in saturated pool boiling of water by nanoparticle-coating and a honeycomb porous plate

Mori, Shōji; Aznam, Suazlan Mt; Okuyama, Kunito

doi:10.1016/j.ijheatmasstransfer.2014.08.046

Cited by 85 publications

(31 citation statements)

References 21 publications

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“…Recently, Mori et al [94] investigated the changes in CHF for different surface modifications. The test surfaces were a nanoparticle-deposited surface, a honeycomb porous plate installed on a plain surface, a honeycomb porous plate installed on a nanoparticledeposited surface, and a plain surface for surfaces with 10, 30, and 50 mm in diameter.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A comprehensive review on pool boiling of nanofluids

Çiloğlu

Bölükbaşi

2015

Applied Thermal Engineering

140

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Section: Accepted Manuscriptmentioning

confidence: 99%

A comprehensive review on pool boiling of nanofluids

Çiloğlu

Bölükbaşi

2015

Applied Thermal Engineering

140

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“…For IVR applications, the cooling method should be applicable to a large heated surface. Figure 6 shows the CHF enhancement data obtained by various surface modifications [13,19,[23][24][25][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. The horizontal and vertical axes indicate L' as given by Equation (1) and the ratio of CHF enhancement, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Such separation of the flow paths may reduce flow resistance and, as a result, increase the CHF. We previously showed CHF enhancement of a large heated surface using a honeycomb porous plate in saturated pool boiling of pure water [25,29,30]. The CHF has been enhanced experimentally up to more than approximately twice that of a plain surface (approximately 2.0 to 2.5 MW/m 2 ) with a diameter of 30 mm [29].…”

Section: Introductionmentioning

confidence: 96%

“…Moreover, for a honeycomb porous plate attached to a nanoparticle-deposited surface with L' = 20.4 (50-mm-diameter surfaces), regarded as an infinite surface [2], the CHF was enhanced up to 2.2 times (2.2 MW/m 2 ) [25] as compared with a plain surface. Therefore, high heat flux removal for a large heated surface can be achieved by the attachment of a honeycomb porous plate on the deposited nanoparticles [25].…”

Section: Introductionmentioning

confidence: 99%

“…One motivation of nanofluid research is to apply nanofluid to the strategy for IVR. However, for nanoparticlecoated flat heaters, the CHF in a saturated pool boiling tends to decrease with the increase in heater size [24,25].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CHF enhancement by honeycomb porous plate in saturated pool boiling of nanofluid

Mori

Aznam

Yanagisawa

et al. 2015

Journal of Nuclear Science and Technology

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One strategy for severe accidents is in-vessel retention (IVR) of corium debris. In order to enhance the capability of IVR in the case of a severe accident involving a light-water reactor, methods to increase the critical heat flux (CHF) should be considered. Approaches for increasing the IVR capability must be simple and installable at low cost. Moreover, cooling techniques for IVR should be applicable to a large heated surface. Therefore, as a suitable cooling technology for required conditions, we proposed cooling approaches using a honeycomb porous plate for the CHF enhancement of a large heated surface in a saturated pool boiling of pure water. In this paper, CHF enhancement by the attachment of a honeycomb-structured porous plate to a heated surface in saturated pool boiling of a TiO 2 -water nanofluid was investigated experimentally under atmospheric pressure. As a result, the CHF with a honeycomb porous plate increases as the nanoparticle concentration increases. The CHF is enhanced significantly up to 3.2 MW/m 2 at maximum upon the attachment of a honeycomb porous plate with 0.1 vol.% nanofluid. To the best of the author's knowledge, under atmospheric pressure, a CHF of 3.2 MW/m 2 is the highest value for a relatively large heated surface having a diameter exceeding 30 mm.

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Thermal Reliability and Electrical Properties of Integrated Copper Inverse Opal Structures

Singhal

Lohan²,

Kohanek

et al. 2021

Adv Eng Mater

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Templating with self‐assembled colloidal crystals has enabled fabrication of porous materials with potential for sensing, heat transfer, and energy storage applications. Herein, electrical, thermal, and mechanical properties of templated electroplated metallic copper inverse opals (CIO) containing close‐packed 500 nm pores are evaluated via a four‐point probe, eddy current, lap shear measurements, thermal cycling, and finite‐element analysis (FEA). CIOs are found to have an electrical conductivity of ≈4 × 106 S m−1, about 15% of pure copper, about the expected value based on the measured electroplated copper conductivity and the CIO pore structure. The good electrical and thermal properties of this structure, coupled with its connected porosity, make it attractive for two‐phase cooling applications. However, the thermal reliability of this structure raises questions about its integrity. It is found that this structure fails around 150 cycles when cycled between −40 and 200 °C at 10 °C min−1. Scanning electron micrograph (SEM) images of failed samples show that the failure plane lies within the CIO and generally at the thinnest interconnects in the structure, which agrees with FEA of the CIO structure, which shows stress concentrations at thin regions of the interconnects in the structure.

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Enhancement of the critical heat flux in saturated pool boiling of water by nanoparticle-coating and a honeycomb porous plate

Cited by 85 publications

References 21 publications

A comprehensive review on pool boiling of nanofluids

A comprehensive review on pool boiling of nanofluids

CHF enhancement by honeycomb porous plate in saturated pool boiling of nanofluid

Thermal Reliability and Electrical Properties of Integrated Copper Inverse Opal Structures

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