Alternative low cost based core systems for vacuum insulation panels

Almeida, F.A.; Corker, Jorge; Ferreira, N.M.; Neto, M.A.; Fan, Mizi; Beyrichen, Hermann; Caps, R.

doi:10.1016/j.ctmat.2016.10.002

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…Due to the wood-like qualities of composite materials comprised of lightweight, insulating, and acoustic perlite, they work as a wood replacement. Perlite products may put little stress on existing walls and Due to the fact that the core material contributes for 40% of the overall cost of a fumed silica-based vacuum insulation panel (VIP) [37,38], recent years have seen a rise in research into possibly lowercost core materials [39][40][41][42][43][44][45]. Expanded perlites, which now cost roughly a sixth of the price of fumed silica, have been discovered as prospective options for core materials.…”

Section: Future Researchmentioning

confidence: 99%

The use of perlite in civil engineering applications

Maxineasa

Isopescu

Lupu

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In the last years, research applications in the construction sector have taken a different turn due to rapid urbanization and the necessity to protect the environment and create a balance between the natural and built environments. Taking into account the fact that the thermal efficiency of buildings has an important influence over the environmental performances of the construction sector, the civil engineering specialists have tried to develop and use different new solutions in order to improve this essential building characteristic. Thus, different new materials have been used with the goal of reducing the overall thermal transmittance of the envelope elements and of the total energy consumption needed for heating and cooling. Perlite is one of the materials that have been considered for developing new energy efficient construction applications. The main goal of the present paper is to present all the relevant solutions that have been developed and used in the construction sector that consider perlite as a component part. The present study is the first part of a more extensive research program that takes under evaluation the possibility of using perlite as a thermal insulating material for different constructions.

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Section: Future Researchmentioning

confidence: 99%

The use of perlite in civil engineering applications

Maxineasa

Isopescu

Lupu

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…3 However, since this material is very expensive and thus increases the overall price of the insulation, scientists are searching for viable alternatives. 4 For this purpose, inexpensive filler materials 5 or even waste materials 6 are added to the fumed silica to lower the price. However, alternative materials such as foams 7 or fibers 8 are also being investigated and used in some cases.…”

Section: Introductionmentioning

confidence: 99%

Silica‐based core materials for thermal superinsulations in various applications

Sonnick

Nirschl

Rädle

2022

Intl J of Energy Research

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Summary Vacuum insulation panels (VIP) are usually manufactured using standardized manufacturing processes based on empirical values and in most cases with any fumed silica as the main component of the core material. However, not all applications have the same requirements in terms of thermal conductivity and service life. Therefore, it is useful to adapt the kind of core materials and their product specifications, such as particle size and porosity, to the different applications. Furthermore, in some applications cheaper core materials, like precipitated silica, would be a reasonable alternative. To replace the time‐consuming series of measurements for this purpose, this work offers comprehensive parameter studies to determine the optimum product properties of precipitated silica, fumed silica, silica gel, and glass spheres for use in the building sector, in transport boxes, as a superinsulation at atmospheric pressure, and as a switchable VIP. As a result, not only the preferred materials but also their porosities and particle sizes are presented. For atmospheric pressure and construction applications, fumed silica has to be preferred. For the transport sector and switchable VIPs as well as certain special applications, precipitated silica and silica gel may well be reasonable alternatives.

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“…The high cost is one of the drawbacks of VIP, especially the preparation cost of the core materials, which seriously hinders its application (Almeida et al 2017). As previously stated, the VIP is mainly composed of an insulated core material and a gas barrier envelope.…”

Section: Introductionmentioning

confidence: 99%

“…It can greatly reduce cost as a VIP core material, giving it a higher utilization value. (Kain et al 2013;Almeida et al 2017). Nevertheless, only a few studies have been reported on wood fiber use for this purpose, and its practical performance has yet to be explored.…”

Section: Introductionmentioning

confidence: 99%

Thermal insulation properties of green vacuum insulation panel using wood fiber as core material

Wang

et al. 2019

BioRes

Self Cite

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Wood fibers were prepared as core materials for a vacuum insulation panel (VIP) via a dry molding process. The morphology of the wood fibers and the microstructure, pore structure, transmittance, and thermal conductivity of the wood fiber VIP were tested. The results showed that the wood fibers had excellent thermal insulation properties and formed a porous structure by interweaving with one another. The optimum bulk density that led to a low-cost and highly thermally efficient wood fiber VIP was 180 kg/m3 to 200 kg/m3. The bulk density of the wood fiber VIP was 200 kg/m3, with a high porosity of 78%, a fine pore size of 112.8 μm, and a total pore volume of 7.0 cm3·g-1. The initial total thermal conductivity of the wood fiber VIP was 9.4 mW/(m·K) at 25 °C. The thermal conductivity of the VIP increased with increasing ambient temperature. These results were relatively good compared to the thermal insulation performance of current biomass VIPs, so the use of wood fiber as a VIP core material has broad application prospects.

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Alternative low cost based core systems for vacuum insulation panels

Cited by 4 publications

References 11 publications

The use of perlite in civil engineering applications

The use of perlite in civil engineering applications

Silica‐based core materials for thermal superinsulations in various applications

Thermal insulation properties of green vacuum insulation panel using wood fiber as core material

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