Programm Photovoltaik Ausgabe 2008 ... - Bundesamt für Energie BFE

BIPV-CIS
Eidgenössisches Departement für
Umwelt, Verkehr, Energie und Kommunikation UVEK
Bundesamt für Energie BFE
IMPROVED INTEGRATION OF PV INTO
EXISTING BUILDINGS BY USING THIN FILM
MODULES FOR RETROFIT
Annual Report 2007
Author and Co-Authors Tamás Szacsvay
Institution / Company 3S Swiss Solar Systems AG
Address Schachenweg 24, 3250 Lyss
Telephone, E-mail, Homepage +41 (0) 32 391 11 00 10, sz@3-s.ch, www.3-s.ch
Project- / Contract Number 503777 / SBF 03.0046
Duration of the Project (from – to) 1.1.2004 – 30.06.2009
Date January 2008
ABSTRACT
The results of the project will improve and widen the potential for the integration of solar (PV) energy
systems into existing buildings. Special attention will be paid to architectural and aesthetic questions.
Building integration of PV systems in most cases leads to a “high tech” and “modern” appearance of
the building. This is caused by the typical window-like surface of most conventional PV modules. Regarding
however that 90% of the building stock consists of longer existing, that means “old fashioned”
buildings, it is evident that an aesthetically satisfying building integration of PV needs a lot of good will
and creativity from planners and architects. In many existing building integrated PV systems the
modules contrast with the building and its surroundings.
A European survey on the potential and needs for building integrated PV components and systems
will identify the basis for the development of modules away from the glass /window-like appearance.
In the project PV roof tiles, overhead glazing and façade elements based on CIS thin film technology
will be developed and investigated, which have a modified optical appearance for better adaptation to
the building skin. One of the ideas is optical decoupling of substrate and cover glass.
A complete roof tile system with thin film cells adapted to the visual appearance of conventional roof
tiles and innovative connection and mounting will be developed. The work includes prototype fabrication
and tests according to relevant standards and subsequent performance tests.
Novel overhead glazing includes semitransparent thin film modules optimised for daylight transmission.
The back side appearance will be modified in order to represent the visible inner part of the
building skin. For overhead and insolating glazing an invisible interconnection and for PV roof tiles a
low cost connector will be developed. Project result will be PV modules and generators for improved
building integration ready for industrial manufacturing.
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