Multi-field and multi-scale characterization of novel super insulating panels/systems based on silica aerogels: Thermal, hydric, mechanical, acoustic, and fire performance

Ibrahim, Mohamad; Nocentini, Kévin; Stipetić, Marina; Dantz, Sebastian; Caiazzo, Francesco Giuseppe; Sayegh, Hasan; Bianco, Lorenza

doi:10.1016/j.buildenv.2019.01.019

Cited by 35 publications

(14 citation statements)

References 30 publications

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“…With the increasing importance of indoor comfort and energy efficiency in buildings [1][2][3][4], the thermal performance of facades' coating materials, such as thermal insulating mortars, has been a growing research area [5,6]. According to EN 998-1 [7], a thermal insulating mortar must present λ ≤ 0.200 W•m −1 •K −1 to be classified as T2, or λ ≤ 0.100 W•m −1 •K −1 to be classified as T1.…”

Section: Introductionmentioning

confidence: 99%

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

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This research provides a statistical analysis of the mechanical and physical properties of thermal insulating mortars developed in the laboratory and by the industry with and without the incorporation of nanomaterials. This was evaluated by carrying out a uni and bivariate analysis, principal components and factor analysis, cluster analysis, and the application of regression models. The results show that it is possible to find associations between these mortars’ properties, but also how these formulations’ development can be approached in the future to achieve better overall performance. They also show that the use of nanomaterials, namely silica aerogel, significantly improved the mortars’ thermal insulation capabilities, allowing us to obtain mortar formulations with thermal conductivities below the values presented by classic thermal insulating materials. Therefore, with this investigation, other researchers can support their product-development choices when incorporating nanomaterials to reduce mortars’ thermal conductivities, increasing their production efficiency, overall multifunctionality, and sustainability.

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Section: Introductionmentioning

confidence: 99%

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

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“…(2014) Aerogel glazing in the south façade The aerogel can increase the acoustic insulation level from 28 to 31 dB. Ibrahim et al. (2019) Aerogel insulation wall The aerogel insulation can improve the acoustic insulation by 7 dB.…”

Section: Modeling Development and Multi-criteria Assessmentmentioning

confidence: 99%

Artificial neural network-based smart aerogel glazing in low-energy buildings: A state-of-the-art review

Zhou

2021

iScience

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“…It is a lightweight material with density and thermal conductivity of 150-220 kg/m 3 and 0.024-0.027 W/mK, respectively [11][12][13], depending on the percentage of aerogel granules in the mixture [14]. Aerogel render has higher compressive strength [15,16], low water permeability [17], and is inert to flame. However, aerogel's major drawback is the lower heat storage capacity compared to the conventional insulators and construction materials, as shown in Figure 1 [7].…”

Section: Introductionmentioning

confidence: 99%

“…Figure16. Impact of phase change temperature on severe discomfort hours (SDH), peak cooling demand, energy savings, emission reductions, and cost savings.…”

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confidence: 99%

Retrofitting Building Envelope Using Phase Change Materials and Aerogel Render for Adaptation to Extreme Heatwave: A Multi-Objective Analysis Considering Heat Stress, Energy, Environment, and Cost

2021

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Energy retrofitting the existing building stock is crucial to reduce thermal discomfort, energy consumption, and carbon emissions. However, insulating and enhancing the thermal mass of an existing building wall using traditional methods is a very challenging and expensive task. There is a need to develop a material that can be applied easily in an existing occupied building without much interruption to occupants’ daily life while also having high thermal resistance and heat storage capacity. This study aimed to investigate a potential building wall retrofit strategy combining aerogel render and Phase change materials (PCM) because aerogel render is highly resistive to heat and PCM has high thermal mass. While a number of studies investigated the thermal and energy-saving performances of aerogel render and PCM separately, no study has been done on the thermal and energy-saving performance of the combination of PCM and aerogel render. In this study, the performance of 12 different retrofit strategies, including aerogel and PCM, were evaluated numerically in terms of heat stress, energy savings, peak cooling, emission, and lifecycle cost using a typical single-story Australian house. The results showed that applying aerogel render and PCM on the outer side of the external walls and PCM and insulation in ceilings is the best option considering all performance indicators and ease of application. Compared to the baseline, this strategy reduced severe discomfort hours by 82% in a free-running building. In an air-conditioned building, it also decreased energy use, peak cooling demand, CO2 emission, and operational energy cost by 40%, 65%, 64%, and 35%, respectively. Although the lifecycle cost savings for this strategy were lower than the “insulated ceiling and rendered wall without PCM” case, the former one was considered the best option for its superior energy, emission, and comfort performance. Parametric analysis showed that 0.025 m is the optimum thickness for both PCM and aerogel render, and the 25 °C melting point PCM was optimum to achieve the best results amongst all performance indicators for a typical Australian house in Melbourne climate.

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Multi-field and multi-scale characterization of novel super insulating panels/systems based on silica aerogels: Thermal, hydric, mechanical, acoustic, and fire performance

Cited by 35 publications

References 30 publications

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Artificial neural network-based smart aerogel glazing in low-energy buildings: A state-of-the-art review

Retrofitting Building Envelope Using Phase Change Materials and Aerogel Render for Adaptation to Extreme Heatwave: A Multi-Objective Analysis Considering Heat Stress, Energy, Environment, and Cost

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