Passive Cooling Against the (Night) Sky

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Ron Zevenhoven, Martin Fält
Publiceringsår: 2014
Tidskrift: Journal of Sustainable Research in Engineering
Tidskriftsakronym: JSRE
Volym: 1
Nummer: 1
Artikelns första sida, sidnummer: 49
Artikelns sista sida, sidnummer: 54
eISSN: 2409-1243


Abstrakt

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.


Nyckelord

Radiative cooling, Sky, Thermal radiation

Senast uppdaterad 2019-23-09 vid 05:07