Numerical study on performances of mini-channel heat sinks with non-uniform inlets

“…The manufacturing of copper MCHE and investigations conducted on varying heat flux value by Qu and Mudawar et al 2002 [29] concluded the temperature profile correlation for non-uniform heat flux. Liu, Xiao et al 2016 [30] Concluded that decrease in saturation temperature and rise in vapor eminence and bulk flux significantly increase the heat transfer coefficient and pressure drop inside the square shape copper mini channels. Del Col, Bortolin et al 2011 [31] Did a similar study on square shape micro channels but observed no significant improvement in heat transfer coefficient regardless of similar test conditions.…”

Section: B Materialsmentioning

confidence: 99%

Material Selection for Micro Channel Heat Exchangers for Industrial Waste Heat Recovery

Alam¹

2019

IJEW

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The aim of this paper is to provide the softwarebased materials selection approach for the micro channel heat exchanger for high-temperature industrial waste heat recovery. Industrial heat processing and heat recovery places increasing demand for material performance in extreme conditions. These extreme conditions accelerate the material's degradation in turn leading to performance and efficiency reduction. Therefore the development of new compatible materials demand material qualification for the miniaturized technology to function over a long period of time with full efficiency. This paper proposes methodology for the material identification and selecting appropriate material for the micro channel heat exchanger to recover high-temperature (>500 ℃) industrial waste heat. Thermally stable materials such as aluminum nitride, silicon carbide, alumina, tungsten carbide, tungsten alloys, and nickel and TZM alloys were observed to perform exceptionally well in extreme condition. Thus silicon carbide, aluminum nitride and molybdenum TZM alloys were selected as the most promising materials for micro channel heat exchanger recover hightemperature (500-750 ℃) waste heat from different industries.

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“…Jajja et al [12] experimentally investigated the influence of fin spacing in different heat sinks for effective thermal management. Liu and Jianlin [13] numerically analyzed the fluid flow and thermal characteristics of mini-channel heatsinks with non-uniform inlets. The total thermal resistance of the mini-channel heat sink was reduced by 9.9% to 13.1% using non-uniform baffles.…”

Section: Introductionmentioning

confidence: 99%

Cooling Performance of a Novel Circulatory Flow Concentric Multi-Channel Heat Sink with Nanofluids

et al. 2020

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Heat rejection from electronic devices such as processors necessitates a high heat removal rate. The present study focuses on liquid-cooled novel heat sink geometry made from four channels (width 4 mm and depth 3.5 mm) configured in a concentric shape with alternate flow passages (slot of 3 mm gap). In this study, the cooling performance of the heat sink was tested under simulated controlled conditions.The lower bottom surface of the heat sink was heated at a constant heat flux condition based on dissipated power of 50 W and 70 W. The computations were carried out for different volume fractions of nanoparticles, namely 0.5% to 5%, and water as base fluid at a flow rate of 30 to 180 mL/min. The results showed a higher rate of heat rejection from the nanofluid cooled heat sink compared with water. The enhancement in performance was analyzed with the help of a temperature difference of nanofluid outlet temperature and water outlet temperature under similar operating conditions. The enhancement was ~2% for 0.5% volume fraction nanofluids and ~17% for a 5% volume fraction.

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Numerical study on performances of mini-channel heat sinks with non-uniform inlets

Cited by 71 publications

References 23 publications

Thermal performances of a multi-scale fluidic network

Thermal performances of a multi-scale fluidic network

Material Selection for Micro Channel Heat Exchangers for Industrial Waste Heat Recovery

Cooling Performance of a Novel Circulatory Flow Concentric Multi-Channel Heat Sink with Nanofluids

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