Geometrical evaluation of T-shaped high conductive pathway with thermal contact resistance for cooling of heat-generating medium

Lorenzini, Giulio; Barreto, E.X.; Beckel, Cássia Cris; Schneider, Paulo Smith; Isoldi, Liércio André; Santos, Elizaldo Domingues dos; Rocha, Luíz Alberto Oliveira

doi:10.1016/j.ijheatmasstransfer.2017.01.008

Cited by 33 publications

(11 citation statements)

References 18 publications

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“…The current literature also documents various T-and Y-shaped fin geometries corresponding to the minimum resistance to the heat flow relative to the different boundary conditions and constraints [14][15][16]. Furthermore, the effect of the inverted fins (cavities filled with high-conductivity inserts) on the maximum temperature and heat transfer rate were documented in the literature [17,18]. On the contrary to the fins, the inverted fins decrease the resistance to the heat flow in a conductive medium [19].…”

Section: Introductionmentioning

confidence: 94%

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

Çetin¹,

Çetkin²

2017

IJHT

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In this study, authors show that maximum excess temperature on a heat generating cylindrical solid domain can be minimized with numerically optimized rectangular cavities and T-shaped fins. The effect of the cavities and the fins on overall thermal resistances were compared while their volume fraction in a unit volume element is fixed. Furthermore, the designs correspond to the minimum thermal resistance were uncovered for two types of flows; parallel and cross-flow. The governing equations of the heat transfer and the fluid flow were solved simultaneously in order to show the effects of design on the flow characteristics and the thermal performance. Two-dimensional solution domain was used to uncover the thermal performance in cross-flow case because the flow direction is perpendicular to the heat transfer surface area of the heat generating domain. However, three-dimensional domain was used in parallel flow case because the fluid flows along the outer surface of the heat generating domain. For the cross-flow case, the results show that T-shaped assembly of fins with longer stem and shorter tributaries correspond to the lower peak temperature. In addition, the results also show that there is an optimal cavity shape that minimizes the peak temperature. This optimal shape becomes thinner when the number of the cavities increase. In parallel flow case, fins with thicker and shorter stem and longer tributaries correspond to the minimum excess temperature. In addition, the longer and thinner cavities increase the thermal performance in parallel flow case.

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Section: Introductionmentioning

confidence: 94%

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

Çetin¹,

Çetkin²

2017

IJHT

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“…The thermal contact resistance in various applications has been under intensive studies recently. (Dhuley, 2019;Liu, Ma, Wang, Wang, & Yang, 2019;Lorenzini et al, 2017;Ngo, Byon, & Lee, 2018;Xian, Zhang, Zhai, Yuan, & Yang, 2018;Dongmei, Huanxin, Shanjian, & Limei, 2017).…”

Section: Public Interest Statementmentioning

confidence: 99%

The thermal contact resistance of a steel-ceramic interface with oxide intermediates

2020

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Metal structures covered by refractories are widely employed in high temperature processes such as incineration and metal production. The thermal resistance in refractories used in high temperature processes is associated with different phases, phase boundaries and porosity in the refractory and with the thermal contact resistance between the refractory and the metal interface. Here, a light flash method was used to evaluate the thermal contact resistance of the ceramic/steel interface at temperatures of 25, 100, 200, 300 and 400°C. The material combinations studied were a commonly-used reference ceramic, Pyroceram 9606, and pressure vessel steel with oxidizing treatment at 450 and 650°C for 50 h. Thermal resistance at a ceramic/steel interface increased significantly when a porous oxide layer was formed on the steel surface. The thermal contact resistance of the interface varied from 0.1 to 0.4 × 10 −3 m 2 K/W, depending on the temperature and the oxidization of the steel sample.

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“…This is particularly true when it comes to heat transfer and fluid flow. Examples can be found in the domain of the cooling of electronics [4][5][6], latent thermal storage [7,8], heat transfer and fluid [9], photovoltaic modules [10], etc.…”

Section: Symbolsmentioning

confidence: 99%

Role of flow architectures on the design of radiant cooling panels, a constructal approach

Mosa

Labat

Lorente

2019

Applied Thermal Engineering

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Here we document the performance of a radiant cooling panel made of flow channels sandwiched between a suspended metal plate and an insulation layer. The flow passages represent the crucial element of the panel. In the present work, the heat transfer and flow characteristics of the panel are investigated. A numerical study is conducted to explore the role played by the flow architectures on the overall performance of the panel in steady state, subjected to radiation and convection heat fluxes from the bottom. A comparison between serpentine and canopy-to-canopy (dendritic) flow channels is presented. In all the cases, the following geometrical constrains apply: fixed plate area and flow volume. From one configuration to the other, the flow is given more freedom to morph in accord with the Constructal approach. We demonstrated that the dendritic architecture allows a significant improvement in the cooling panel performance, with more cooling capacity and less pumping power. In addition, we showed that the morphing of the panel itself toward more compactness is also a way to increase the ratio of cooling capacity/pumping power.

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Geometrical evaluation of T-shaped high conductive pathway with thermal contact resistance for cooling of heat-generating medium

Cited by 33 publications

References 18 publications

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

The thermal contact resistance of a steel-ceramic interface with oxide intermediates

Role of flow architectures on the design of radiant cooling panels, a constructal approach

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