Modeling film boiling within chimney-structured porous media and heat pipes

Yeo, D.Y.; No, Hee Cheon

doi:10.1016/j.ijheatmasstransfer.2018.03.093

Cited by 17 publications

(5 citation statements)

References 17 publications

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“…This will produce a lot of unwanted heat in electronic devices, which can lead to irreversible failure in the case of overheating, so there is an urgent need for new and efficient heat-exchange devices to ensure the safe operation of electronic devices. Cooling technology has been an area of research in electronics since the 1940s [4], and many powerful cooling methods have been developed to date, including air cooling, liquid cooling, heat-pipe cooling, jet cooling and thermoelectric cooling [5][6][7][8]. Among these methods, liquid cooling has been acknowledged as a particularly good way of dealing with the dissipation of heat in high-power electronic equipment.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

He,

Hu,

Zhang

et al. 2024

Processes

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Heat-transfer enhancement and entropy generation were investigated for a double-helical-type-channel heat sink with different rib structures set on the upper wall. Based on available experimental data, a series of simulations with various turbulence models were conducted to find the best numerical model. Five different rib structures were considered, which were diamond (FC-DR), rectangular (FC-RR), drop-shaped (FC-DSR), elliptic (FC-ER) and frustum (FC-FR). The research was carried out under turbulent flow circumstances with a Reynolds number range of 10,000–60,000 and a constant heat-flow density. The numerical results show that the thermal performance of the flow channel set with a rib structure is better than that of the smooth channel. FC-ER offers the lowest average temperature and the highest temperature uniformity, with a Nusselt number improvement percentage ranging from 15.80% to 30.77%. Overall, FC-ER shows the most excellent performance evaluation criteria and lowest augmentation entropy-generation number compared with the other reinforced flow channels.

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Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

He,

Hu,

Zhang

et al. 2024

Processes

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“…The junction temperature of the IGBT module is also affected by external cooling conditions, and proper thermal design is necessary to maintain the performance and reliability of the IGBT over its lifetime. So far, many methods have been investigated for cooling IGBT modules, including air cooling, direct liquid cooling, indirect liquid cooling, jet impingement cooling, thermoelectric cooling, and heat pipe cooling [13][14][15][16]. Air cooling is the most reliable, simple, and cost-effective method.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Optimization of Series Flow Channel Water-Cooled Plate for IGBT Modules

Zhang

Xing

et al. 2023

Energies

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The stability in the operation of insulated gate bipolar transistor (IGBT) modules plays a crucial role in wind power generation. It is essential to improve the thermal performance of the heat sink of IGBT modules in wind power converters and reduce the power consumption of liquid cooling systems, in order to optimize the heat dissipation of IGBT modules in wind power converters. In this paper, a simulation model of the liquid-cooled heat sink of the IGBT module is established and the performance of three different series flow channel structures is compared by computational fluid dynamics (CFD). Moreover, based on the orthogonal test design, the three factors (channel width, channel height, and cold plate wall thickness) affecting the performance of the water-cooled plate were ranked and optimized. The results show that the water-cooled plate with double-helical-type flow channel structure has the best comprehensive performance. In addition, for the double-helical-type structure, the optimal combination of channel structure parameters about channel width, channel height, and cold plate wall thickness is obtained. After optimization, the maximum IGBT temperature, thermal resistance, and pressure drop of the cold plate are reduced by 3.13%, 5.78%, and 18.87%, respectively, compared with the double-S structure in parameter case one. The proposed methods and results are expected to provide theoretical guidance for the thermal management of IGBT modules in wind power converters.

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“…In contrast to the voluminous research available on single phase flows, only a handful of studies have attempted to fundamentally study multiphase transport phenomena in heat-generating porous media. However, several fundamental analyses are available on multiphase flow in porous media without consideration of heat generation [11][12][13][14][15][16][17][18][19]. It is evident from these investigations that the boiling heat transfer characteristics in porous media approach that of clear fluids as the particle sizes are progressively made larger.…”

Section: Introductionmentioning

confidence: 99%

Impact of liquid coolant subcooling on boiling heat transfer and dryout in heat-generating porous media

Chakravarty¹,

Ghosh²,

Sen³

et al. 2021

Preprint

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The present article discusses the impact of liquid coolant subcooling on multiphase fluid flow and boiling heat transfer in porous media with internal heat generation. Although extremely relevant and important, only limited studies are available in the open literature on the effects of coolant subcooling in heat-generating porous media and hence, this requires a detailed analysis. The analysis is carried out using a developed computational model of multiphase fluid flow through clear fluid and porous media considering the relevant heat transfer and mass transfer phenomena. Results suggest that the qualitative nature of boiling heat transfer from the heat-generating porous body, with subcooled coolants, remain similar to that observed with a saturated coolant. Quantitative differences are, however, observed as a result of solid-liquid convective heat transfer, and competing mechanisms of boiling and condensation heat transfer, when subcooled liquid coolant is present. It is observed that a substantially larger heating power density is requiredas coolant subcooling is increased -for achieving the same temperature rise in the porous body. Dryout power density at different coolant subcooling is also observed to follow a similar trend. The thermal energy removal limit is, hence, observed to be substantially enhanced in presence of subcooled coolants. Further, the dryout region within the porous body is observed to gradually shift towards its interior as the coolant subcooling is increased.

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Modeling film boiling within chimney-structured porous media and heat pipes

Cited by 17 publications

References 17 publications

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

Performance Evaluation and Optimization of Series Flow Channel Water-Cooled Plate for IGBT Modules

Impact of liquid coolant subcooling on boiling heat transfer and dryout in heat-generating porous media

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