Passive Cooling Against the (Night) Sky

Ron Zevenhoven, Martin Fält

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    Abstrakti

    This paper summarises R&D work that evolved towards the design of a smart skylight (roof window) aiming at keeping its inside compartment at a lower temperature than the surroundings. A skylight that gives maximum cooling (summer) or insulating (winter) performance is being optimised at Åbo Akademi University for conditions in (northern) Europe. As passive cooling through long-wave (LW) thermal radiation must counteract incoming short-wave (SW) thermal radiation, a drawback to that region is the length of daytime during summer. For equatorial locations like Kenya the use of a passive cooling skylight would benefit from the more constant duration of night-time and temperature. Depending on location for application, a two- or morewindowed skylight must be designed. Results presented include the modelling of skylight windows using a four-band thermal radiation model and Comsol Multiphysics software for simulation. Several cases show that very significant increases in (passive) cooling heat output can be achieved.
    AlkuperäiskieliEi tiedossa
    Sivut49–54
    JulkaisuJournal of Sustainable Research in Engineering
    Vuosikerta1
    Numero1
    TilaJulkaistu - 2014
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Keywords

    • Thermal radiation
    • Radiative cooling
    • Sky

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