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Innovative glazings for high solar gains and daylighting

Objective



Objectives

The objectives of this project are to develop advanced window systems with a widely variable solar transmittance, a low u-value (<1.1 W/m2K) and in special cases improved daylighting performance. In order to meet the objectives, different new technologies will be pursued and integrated into one system.
Thus the main task is to develop:

(1) highly transparent coatings with low thermal emittance in order to achieve glazings with uvalues < 1.1 W/m2K
(2) a switching system with a very wide dynamic range for the transmittance modulation (between 0.7 and 0.05)
(3) broad-band antireflection layers with a gain in solar transmittance of at least 5% per pane
(4) daylight directing and distributing components with a maximum efficiency > 40%.

Technical Approach

New materials and production technologies are available on a small scale in research laboratories. During the project these new materials and technologies have to be combined to build up new window systems.
The scaling up will be done in close cooperation with the consulting industrial companies. At the end of the project a decision has to be made as to which technologies will be available for large scale industrial production.

Complete systems will be constructed, characterised and tested. In close cooperation with industry and architects, the appearance and technical acceptance will be tested and the cost of the systems analysed.
Expected Achievements and Exploitation

In the course of the project, results in the different fields will be presented at conferences and discussed with the scientific world. Positive feedback from outside will be included in the project.

At the end of the project the results will be presented in a special workshop during Eurosun II, which will be held in Ljubljana in September 1998. For this workshop, a short summary of the final report will be available. The workshop will be organized by the industrial partners so that they can demonstrate their interest in this field.

Depending on the success of the project, demonstration projects are planned within the THERMIE Programme afterwards.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.*
Address
Heidenhofstrasse 2
79110 Freiburg (In Breisgau)
Germany

Participants (6)

ALBERT-LUDWIGS-UNIVERSITAET FREIBURG
Germany
Address
Stefan Meier Strasse 21
79104 Freiburg (In Breisgau)
Autotype International Ltd
United Kingdom
Address
Grove Road
OX12 7BZ Wantage
Centre National de la Recherche Scientifique (CNRS)
France
Address
Rue Maurice Audin
69518 Vaulx-en-velin
National Physical Laboratory (NPL)
United Kingdom
Address
Queen's Road
TW11 0LW Teddington
University of Exeter
United Kingdom
Address
Stocker Road
EX4 4QL Exeter
Uppsala University
Sweden
Address

751 21 Uppsala