Fabrication and characterization of low-cost and green vacuum insulation panels with fumed silica/rice husk ash hybrid core material

Li, Cheng Dong; Saeed, Muhammad Usman; Pan, Ning; Chen, Zhao Feng; Xu, Teng

doi:10.1016/j.matdes.2016.06.071

Cited by 35 publications

(10 citation statements)

References 54 publications

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“…Accordingly, the development of innovative insulation materials has gained the interest of the scientific community in the recent years. Two different approaches have been adopted: (1) the reduction of the amount of material used, that is, improving the thermal performance of the materials [9,10]; and (2) the reduction of the environmental impact associated to the material, that is, replacing conventional materials with "environmental friendly" ones [11,12]. Aerogels and vacuum insulation cells are examples of the former.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

et al. 2018

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The reduction in energy demand for heating and cooling with insulation materials increases the material related environmental impact. Thus, implementing low embodied energy materials may equilibrate this tradeoff. Actual trends in passive house postulate bio-based materials as an alternative to conventional ones. Despite that, the implementation of those insulators should be carried out with a deeper analysis due to their hygroscopic properties. The moisture transfer, the associated condensation risk and the energy consumption for seven bio-based materials and polyurethane for a building-like cubicle are analysed. The performance is evaluated combining a software application to model the cubicle (EnergyPlus) and a tool to optimize its performance (jEPlus). The novelty of this optimization approach is to include and evaluate the effects of moisture in these insulation materials, taking into account the mass transfer through the different layers and the evaporation of the different materials. This methodology helps optimise the insulation type and thickness verifying the condensation risk, preventing the deterioration of the materials. The total cost of the different solutions is quantified, and the environmental impact is determined using the life cycle assessment methodology. The effect of climate conditions and the envelope configuration, as well as the risk of condensation, are quantified. The results show that cost and environmental impact can be reduced if bio-based materials are used instead of conventional ones, especially in semiarid climates. Condensation risk occurs for large thicknesses and in humid climates. In our case studies, hemp offered the most balanced solution.

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Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

et al. 2018

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“…Several methods can be used to evacuate and produce VIP samples, [31][32][33][34]. These studies have confirmed that the evacuation pressure should be less than 0.1 mbar, so as to produce an effective vacuum insulation panel, and that the procedure for producing VIPs with a reliable quality is highly complicated.…”

Section: Production Of Vipsmentioning

confidence: 92%

The Effect of Lightweight Concrete Cores on the Thermal Performance of Vacuum Insulation Panels

et al. 2020

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The performance of vacuum insulation panels (VIPs) is strongly affected by several factors, such as panel thickness, design, quality of vacuum, and material type. In particular, the core materials inside VIPs significantly influence their overall performance. Despite their superior insulation performance, VIPs are limited in their widespread use as structural materials, because of their low material strength and the relatively expensive core materials. As an alternative core material that can compensate these limitations, foamed concrete, a type of lightweight concrete with very low density, can be used. In this study, two different types of foamed concrete were used as VIP core materials, with their effects on the thermal behavior of the VIPs having been evaluated using experimental and numerical methods. To confirm and generate numerical models for VIP analysis, micro-computed tomography (micro-CT) was utilized. The obtained results show that insulation effects increase effectively when panels with lightweight concrete are in a vacuum, and both foamed concrete types can be effectively used as VIP core materials.

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“…Under the condition of vacuum pumping, the main heat transfer mode in the core material is solid conduction. The total thermal conductivity of VIP can be approximately expressed as the sum of solid thermal conductivity, gas thermal conductivity, and radiative thermal conductivity (Li et al 2016). In vacuum, the gas thermal conductivity is nearly zero.…”

Section: Solid Thermal Conductivitymentioning

confidence: 99%

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

Wang

et al. 2019

BioRes

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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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Fabrication and characterization of low-cost and green vacuum insulation panels with fumed silica/rice husk ash hybrid core material

Cited by 35 publications

References 54 publications

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

Multi-objective optimisation of bio-based thermal insulation materials in building envelopes considering condensation risk

The Effect of Lightweight Concrete Cores on the Thermal Performance of Vacuum Insulation Panels

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

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