Integrated multifunctional glazing for dynamical daylighting

• Forschungsstelle: BFE
• Projektnummer: SI/500222

Kurzbeschreibung (Deutsch)

Integrated multifunctional glazing for dynamical daylighting

Schlussbericht (Englisch)

In this project, a novel integrated concept and the development of advanced glazing for dynamical daylighting are studied. The novel glazing will combine the functions of daylighting, glare protection, overheating protection in summer and thermal insulation in winter. Novel micro-structures shall provide redirection of the incident solar radiation, thus providing for chosen angles projection of daylight deep into the room in the same manner as an anidolic mirror-based system, as well as glare protection. The solar gains will be reduced for chosen angles. Technological progress includes the fabrication and improvement of micro-structures by selective deposition of micro-mirrors. An advanced set of software tools using an original algorithmic approach was developed specifically for this research. It was used for the development of a novel complex fenestration system combining an original 2D profile and thin films. A structure offering both redirection of light for daylighting and seasonal blocking of direct radiation for dynamic thermal control was found. Direct and diffuse solar gains were evaluated using radiometric data from meteonorm. Radiance was used to render daylighting in offices and compute illuminance levels. This design was patented and presented at both international and national conferences and workshops. An advanced mould corresponding to this design with feature periods of 200 micron was used in a 5 step process to create initial samples. The structure was replicated to create a soft mould for the nano lithography imprinting of polymers. The resulting polymeric structures were coated with aluminum thin films and embedded to create micro-mirrors. Critical steps in the fabrication process were identified and solutions were studied. An optical set-up was conceived and built for the optical characterization of samples. Samples surfaces and profiles were also studied using optical and contact profilometry, confocal microscopy, SEM and 3D SEM.

Auftragnehmer/Contractant/Contraente/Contractor:
Laboratoire d’Energétique Solaire et de Physique du Bâtiment (LESBAT)

Autorschaft/Auteurs/Autori/Authors:
Kostro,André
Schüler,Andreas

Zugehörige Dokumente

• Integrated multifunctional glazing for dynamical daylighting - Rapport final [PDF] 1'804 kB