An Experimental Investigation on the Influence of Copper Ageing on Flow Boiling in a Copper Microchannel
TL;DR: In this paper, the influence of copper ageing on flow boiling heat transfer and pressure drop in copper microchannels of two different hydraulic diameters was investigated, and the experimental results showed that the influence was negligible.
Abstract: The study reports the experimental investigation on the influence of copper ageing on flow boiling heat transfer and pressure drop in copper microchannels of two different hydraulic diamete...
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TL;DR: In this paper, the influence of vapour venting on the flow boiling pressure drop and heat transfer of water in copper mini/micro-channels of three different aspect ratios was investigated.
18 citations
TL;DR: In this article, the aging behavior of an untreated and a laser-textured copper boiling surface during an eight-day testing period under pool boiling conditions using saturated water at atmospheric pressure was investigated.
14 citations
TL;DR: In this article, the significance of surface modification on the heat transport phenomena under nucleate pool boiling configuration of saturated R-141b at ambient condition over SiO2 thin film (TF) nanocoated surfaces was investigated.
14 citations
TL;DR: In this paper, a one-dimensional model is proposed to estimate the pressure drop and heat transfer coefficient for flow boiling in a rectangular microchannel, taking into account the pressure fluctuations caused due to the confined bubble growth and the effect of pressure fluctuations on the heat transfer characteristics.
12 citations
TL;DR: In this paper, heat sinks based on flow boiling in microchannels have the potential to mitigate temperature rise in high heat flux devices such as electronic equipment. But the major challenge is the instabil...
Abstract: Heat-sinks based on flow boiling in microchannels have the potential to mitigate temperature rise in high heat flux devices such as electronic equipment. One of the major challenges is the instabil...
9 citations
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TL;DR: In this article, a comparison between experimental flow boiling heat transfer results obtained using two different metallic tubes is presented in the form of local heat transfer coefficient versus local quality and axial distance.
29 citations
"An Experimental Investigation on th..." refers background or result in this paper
...Besides, increased surface roughness need not necessarily result in increase of boiling heat transfer coefficient [19, 20]....
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...Experimental investigations by other researchers [19, 20, 31, 38], also confirm that surface characteristics do have an effect on the two-phase pressure drop....
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TL;DR: In this article, a new correlation based on experimental results for subcooled flow boiling of water at low pressure is proposed, preceded by a brief review on how the solid-fluid interaction has been dealt with in past correlations.
29 citations
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...[30] experimentally investigated the effect...
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TL;DR: In this paper, the authors present experimental data on heat transfer and pressure drop characteristics at flow boiling of refrigerant R-134a in a horizontal microchannel heat sink, where the microchannel plate and heating block were divided by the partition wall for the local heat flux measurements.
Abstract: In this paper we present experimental data on heat transfer and pressure drop characteristics at flow boiling of refrigerant R-134a in a horizontal microchannel heat sink. The primary objective of this study was to experimentally establish how the local heat transfer coefficient and pressure drop correlate with the heat flux, mass flux, and vapor quality. The copper microchannel heat sink contains 21 microchannels with 335 × 930 μm2 cross section. The microchannel plate and heating block were divided by the partition wall for the local heat flux measurements. Distribution of local heat transfer coefficients along the length and width of the microchannel plate was measured in the range of external heat fluxes from 50 to 500 kW/m2; the mass flux varied within 200–600 kg/m2-s, and pressure varied within 6–16 bar. The obvious impact of heat flux on the magnitude of heat transfer coefficient was observed. It showed that nucleate boiling is the dominant mechanism for heat transfer. A new model of flow boiling h...
27 citations
TL;DR: In this article, the authors compared a linear pressure gradient method with a pressure gradient measurement method for flow boiling of deionized water in single horizontal microchannels with widths of 0.438mm, 0.561mm and 0.635mm.
23 citations
"An Experimental Investigation on th..." refers background in this paper
...Pressure in the saturated boiling region is assumed to vary linearly with the distance z along the channel length [34] as:...
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TL;DR: In this paper, the effect of surface roughness on the hydrodynamic and thermal performance of micro-channel evaporators was investigated, and a new correlation was developed to predict the heat transfer coefficient of R134a boiling in microchannels.
19 citations
"An Experimental Investigation on th..." refers result in this paper
...Experimental investigations by other researchers [19, 20, 31, 38], also confirm that surface characteristics do have an effect on the two-phase pressure drop....
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