Thermo-hygric properties of a newly developed aerogel based insulation rendering for both exterior and interior applications

Stahl, Thomas; Brunner, Samuel; Zimmermann, M.; Wakili, K. Ghazi

doi:10.1016/j.enbuild.2011.09.041

Cited by 182 publications

(112 citation statements)

References 7 publications

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“…Two examples of such aerogelbased products are aerogel insulation boards, e.g., Heck Aero obtained by gluing several Spaceloft blankets together, or a wet applied high-performance render which was especially developed for retrofitting old historical buildings. 85 Aerogel renders are insulating render systems which contain a large volume…”

Section: Superinsulation Materials and Productsmentioning

confidence: 99%

Energy in buildings—Policy, materials and solutions

Koebel

Wernery

Malfait

2017

MRS Energy & Sustainability

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Buildings account for ∼40% of global energy demands, and the increased adoption of innovative solutions for buildings represents an enormous potential to reduce energy demands and greenhouse gas emissions. Here, we critically review the current and future materials and solutions for the construction sector. We describe how policy affects innovative businesses and the adoption of new products and solutions. We investigate how the building envelope and user behavior determine building energy demands. Compared to conventional solutions, superinsulation materials (vacuum insulation panels, silica aerogel) can achieve the same thermal performance with drastically thinner insulation. With low-emissivity coatings and appropriate filler gasses, double and triple glazing reduces thermal losses by an order of magnitude. Vacuum and aerogel glazing reduce these even further. Switchable glazing solutions maximize solar gains during wintertime and minimize illumination demands whilst avoiding overheating in summer. Upon integration of renewable energy systems, buildings become both producers and consumers of energy. Combined with the dynamic user behavior, temporal variations in energy production require thermal and electrical storage and the integration of buildings into smart grids and energy district networks. The combination of these measures can reduce the energy consumption of the building's stock by a factor of three.

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Section: Superinsulation Materials and Productsmentioning

confidence: 99%

Energy in buildings—Policy, materials and solutions

Koebel

Wernery

Malfait

2017

MRS Energy & Sustainability

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“…Silica aerogel is an aggregate, nano-porous, insulation material, produced using a sol-gel process and supercritical evaporation technology. Material has reasonable insulating performance due to its nano-porous structure (several to tens of nanometers) and very small solid grain size (2-5 nm) [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of the air motion on the heat transport behaviour of wall structures

Szodrai

Lakatos

2017

IRASE

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The laboratory investigations of the heat transfer properties of wall structures are very signifi cant from the point of view of designing the buildings. In this article measurements and calculations will be presented in order to manifest the effect of the forced and un-forced convection of air at the cold surface of the wall. A steady-state method for measuring the thermal resistance of wall structures with Huksefl ux apparatus is presented in this article. The measurements were accomplished through, fi rstly on an un-insulated inbuilt plaster/brick/plaster wall construction and later it was covered with a 0.013 m thick aerogel layer blanket. Aerogels are nanoporous lightweight materials, were discovered more than 70 years ago. In these years their applications are truly spread over. During the investigations the wall structures were tested without forcing the air to motion, and then measurements were carried both on the insulated and un-insulated wall structures, where the movement of the air was forced by a ventilator from three different directions with the same 1 m/s velocity near the wall.

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“…Moreover, aerogel particles were found stable during the hydration of cementitious materials and the compressive strength was good, encouraging the research on aerogel employment in concrete for buildings. Another study [15] presents the development of new kind of rendering based on silica aerogel granulates: Hydrophobized granular silica aerogel (60-90 vol %) was mixed with purely mineral and cement free binder. A thermal conductivity of 0.025 W/m K was measured for the investigated aerogel based rendering at a density of about 200 kg/m 3 and a water vapor transmission resistance of 4 was achieved.…”

Section: Introductionmentioning

confidence: 99%

Development of Innovative Aerogel Based Plasters: Preliminary Thermal and Acoustic Performance Evaluation

et al. 2014

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Abstract:The thermal and acoustic properties of innovative insulating systems used as building coatings were investigated: Granular silica aerogel was mixed with natural plaster in different percentages. This coating solution is transpiring and insulating, thanks to the use of a natural lime coat and aerogel, a highly porous light material with very low thermal conductivity. The thermal conductivity of the proposed solution was evaluated by means of a Heat Flow meter apparatus (EN ISO 12667), considering different percentages of aerogel. The natural plaster without aerogel has a thermal conductivity of about 0.50 W/m K; considering a percentage of granular aerogel of about 90% in volume, the thermal conductivity of the insulating natural coating falls to 0.050 W/m K. Increasing the percentage of granular aerogel, a value of about 0.018-0.020 W/m K can be reached. The acoustic properties were also evaluated in terms of the acoustic absorption coefficient, measured by means of a Kundt's Tube (ISO 10534-2). Two samples composed by a plasterboard support, an insulation plaster with aerogel (thicknesses 10 mm and 30 mm respectively) and a final coat were assembled. The results showed that the absorption coefficient strongly depends on the final coat, so the aerogel-based plaster layer moderately influences the final value. The application of this innovative solution can be a useful tool for new buildings, but also for the refurbishment of existing ones. This material is in development: until now, the best value of the thermal conductivity obtained from manufacturers is about 0.015 W/m K. OPEN ACCESSSustainability 2014, 6 5840 Keywords: aerogel based plasters; silica aerogel; thermal and acoustic performance; refurbishment of buildings

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Thermo-hygric properties of a newly developed aerogel based insulation rendering for both exterior and interior applications

Cited by 182 publications

References 7 publications

Energy in buildings—Policy, materials and solutions

Energy in buildings—Policy, materials and solutions

Effect of the air motion on the heat transport behaviour of wall structures

Development of Innovative Aerogel Based Plasters: Preliminary Thermal and Acoustic Performance Evaluation

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