Development of windows based on highly insulating aerogel glazings

Karsten Ingerslev Jensen, Jørgen Munthe Schultz, Finn Harken Kristiansen

    Research output: Contribution to journalConference articleResearchpeer-review


    Within a finished and a current EU project, research and development of monolithic silica aerogel as transparent insulation in windows are being carried out. On behalf of the partners of the two projects, results related to the window application will be presented here. At the thermal envelope of buildings, the window area is the weakest part with respect to the heat loss, but at the same time, it also provides e.g. solar energy gain. Glazing prototypes have been made of aerogel tiles of about 55 cm sq. (elaborated within the projects). Those tiles are quickly evacuated and easily sealed between two glass panes and a specific rim seal. A heat treatment phase (after the supercritical CO2 drying) of the aerogel is currently being developed in order to improve its optical quality. This step increases the solar transmittance about 6 percent points. For glazing prototypes with an aerogel thickness of approx. 15 mm, a centre heat loss coefficient of below 0.7 W/m² K and a solar transmittance of 76% have been obtained. The research is funded in part by the European Commission within the frameworks of the Non-Nuclear Energy Programme – JOULE III and the Energy, Environment and Sustainable Development Programme – EESD; the contracts JOR3-CT97-0187 (acronym: HILIT) and ENK6-CT-2002-00648 (acronym: HILIT+).
    Original languageEnglish
    JournalJournal of Non-Crystalline Solids
    Pages (from-to)351-357
    Publication statusPublished - 2004
    Event7th International Symposium on Aerogels - Alexandria, VA, United States
    Duration: 2 Nov 20035 Nov 2003
    Conference number: 7


    Conference7th International Symposium on Aerogels
    Country/TerritoryUnited States
    CityAlexandria, VA


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