Experimental characterization and theoretical modeling of the infrared-optical properties and the thermal conductivity of foams

Arduini-Schuster, M.; Manara, Jochen; Vo, C.

doi:10.1016/j.ijthermalsci.2015.07.015

Cited by 33 publications

(17 citation statements)

References 24 publications

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“…The smaller the particles, the more superior the material properties derived therein. Hence, these results revealed that biomass-based carbon-foam composite materials are low-cost and potential materials for thermal storage purposes (Arduini-Schuster et al 2015, Jana et al 2015.…”

Section: Thermal Conductivity Of Pcmsmentioning

confidence: 79%

“…Based on this perspective, alternative solutions were proffered through the inclusion of graphite (Jana et al 2015). Studies have revealed that efficient and low-cost heat transfer management in PCMs has been attained through incorporation of graphitic fins, graphite-additives, and/or graphite foams saturated with PCM (Fang et al 2013, Arduini-Schuster et al 2015. Therefore, in a recent study, enhancement of the thermal management of carbonaceous porous matrices prepared from tannin-based resin through physical foaming was attained through the inclusion of various types and amounts of graphite fillers (Jana et al 2015).…”

Section: Thermal Conductivity Of Pcmsmentioning

confidence: 99%

“…Therefore, in a recent study, enhancement of the thermal management of carbonaceous porous matrices prepared from tannin-based resin through physical foaming was attained through the inclusion of various types and amounts of graphite fillers (Jana et al 2015). The produced composite carbon foams exhibited superior heat conductivity, thereby enhancing their suitability for housing PCMs with potentials of application as functional storage materials (Arduini-Schuster et al 2015). These materials were investigated relative to their mechanical, porous-structure, and thermal properties.…”

Section: Thermal Conductivity Of Pcmsmentioning

confidence: 99%

See 2 more Smart Citations

Recently emerging trends in thermal conductivity of polymer nanocomposites

Idumah

Hassan²

2016

Reviews in Chemical Engineering

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Due to escalating power densities in electronics, information, communication, energy storage, aerospace, and automobile technologies, heat dissipation has become immensely essential for the efficient performance and reliability of photonic, electronics, optoelectronics, and other devices in order to proactively prevent premature failure due to overheating. The functionalization and synergistic inclusion of thermally conducting nanoparticles such as carbon derivatives and metallic and ceramic fillers into polymer matrices have resulted in development of thermally conducting polymer nanocomposites. This has enlarged the scope of application of these materials in areas hitherto restricted due to poor thermal conductivity and, therefore, opened broad windows of opportunities for polymer nanocomposites as emerging alternative replacements for metal components in various applications where effective heat dissipation is compulsory for device performance. Thus, this paper critically discusses globally emerging technologies applied in the development of thermally conductive polymer nanocomposites for various industrial applications.

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Section: Thermal Conductivity Of Pcmsmentioning

confidence: 79%

Section: Thermal Conductivity Of Pcmsmentioning

confidence: 99%

Section: Thermal Conductivity Of Pcmsmentioning

confidence: 99%

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Recently emerging trends in thermal conductivity of polymer nanocomposites

Idumah

Hassan²

2016

Reviews in Chemical Engineering

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“…(Note that some authors [20] also call e f f .L an e↵ective specific extinction coe cient E). Relation (2) would fit approximately the data points, especially at very high and very low Nu 0 values.…”

Section: Influence Of Temperature On the Excess Radiative Conductivitymentioning

confidence: 99%

“…Empirical models, based on the Rosseland approximation [19] and featuring an e↵ective extinction coe cient, have been satisfactorily fitted to experimental data [20,21]. The contribution of radiation to the thermal properties has thus been evaluated for polymer [22][23][24] and carbon [25] foams.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of effective heat conductivities of foams by coupled conduction and radiation

Vignoles

Ortona

2016

International Journal of Thermal Sciences

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E↵ective thermal conductivities (ETC) under vacuum were computed numerically on 3D blocks of open-cell foams either obtained by X-ray tomography or generated by Computer-Aided Design (CAD) with ideal geometries.For the first time a Monte-Carlo/Random Walk code accounting for the coupling of conduction in the solid phase and of radiation in the pore space has been used. The whole range of conduction/radiation ratio, parameterized by a Nusselt number, has been scanned; a law relating the ETC to this parameter has been obtained. In all cases the conductive and radiative contributions are additive. The slope of the radiative contribution to the ETC is found to display a distinct behavior, depending on whether radiation or conduction dominates. The low-temperature regime has an emissivity-dependent ETC slope, while the high-temperature regime does not.The critical ratio between both regimes is related to the ratio between cell and strut diameters. In all cases, it is found that the ETC anisotropy decreases with temperature. Closing some windows enhances conduction parallel to the closing walls and reduces radiation perpendicular to them. This e↵ect is shown to influence the ETC eigendirections in actual media.

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Hollow‐Structured Materials for Thermal Insulation

2018

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Heating and cooling represent a significant portion of overall energy consumption of our society. Due to the diffusive nature of thermal energy, thermal insulation is critical for energy management to reduce energy waste and improve energy efficiency. Thermal insulation relies on the reduction of thermal conductivity of appropriate materials that are engineerable in compositions and structures. Hollow‐structured materials (HSMs) show a great promise in thermal insulation since the existence of high‐density gaseous voids breaks the continuity of heat‐transport pathways in the HSMs to lower their thermal conductivities efficiently. Herein, a timely overview of the recent progress in developing HSMs for thermal insulation is presented, with the focus on summarizing the strategies for creating gaseous voids in solid materials and thus synthesizing various HSMs. Systematic analysis of the documented results reveals the relationship of thermal conductivities of the HSMs and the size and density of voids, i.e., reducing the void size below ≈350 nm is more favorable to decrease the thermal conductivity of the HSMs because of the possible confinement effect originated from the nanometer‐sized voids. The challenges and promises of the HSMs faced in future research are also discussed.

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Experimental characterization and theoretical modeling of the infrared-optical properties and the thermal conductivity of foams

Cited by 33 publications

References 24 publications

Recently emerging trends in thermal conductivity of polymer nanocomposites

Recently emerging trends in thermal conductivity of polymer nanocomposites

Numerical study of effective heat conductivities of foams by coupled conduction and radiation

Hollow‐Structured Materials for Thermal Insulation

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