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Smart window - polymer network liquid crystal with reflective, scattering and clear states

Objective



The purpose of this program is to study the feasability of a smart building component - window opening - being able to a self-adaptation to a thermal of luminous environment. This window might be like a Venitian blind made of electrocontrolled layers.

The Venitian blind patterns (horizontal strips, assembly of squares...) are monitored by a weak amplitude voltage and can exhibit a clear, reflective or opaque state. The reflection of solar light can be effective in the visible or infrared range but also in a large broadband of wavelength.
The glazed component will be based upon new active films (chiral liquid crystal gels) with :

- three different states : a clear, reflective, or scattering state, - very good optical performances for every state,
- selectivity or broadband of the reflectivity
- selectivity (50/100 nm),
- broadband : several hundred of nanometers, (pitch gradient method in the chiral structure),
- reflectivity in a broadband of the visible spectrum or in the near infrared.
To obtain the glazed building component, we will work on :

- implementation of an industrial deposit active film technique, - integration of the film in the glazed component with an electrical control system.

The final objective consists in a smart window realization : Two prototypes will be realized : one with selective reflection film (Solar Heat Gain factor (SHGS) between 0.8 and 0.7 (On/off state)) and one with broadband reflection film (low SHGF of 0.2/0.3).

An important part of the program consists in the studies and the realization of monitoring and self-regulation devices using microsystems which will be integrated with the active film in a glass panel according to the architectural requirements.

Then, a value analysis and specifications of the industrial equipment required will be provided.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

AGENCE DE L'ENVIRONNEMENT ET DE LA MAITRISE DE L'ENERGIE
Address
Route Des Lucioles 500
06560 Valbonne
France

Participants (9)

BARTENBACH LICHTLABOR GMBH
Austria
Address
Rinner Strasse 14
Aldrans
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
France
Address
Rue Jeanne Marvig 29
31055 Toulouse
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
France
Address
Route De Saclay Ecole Polytechnique
91128 Palaiseau
CENTRE SCIENTIFIQUE ET TECHNIQUE DU BATIMENT
France
Address
24,Rue Joseph Fourier 24
38400 Saint-martin-d'hères
Innovative Specialty Films
Belgium
Address
Karreweg 18
9870 Zulte
Innovative Sputtering Technology NV
Belgium
Address
18,Karreweg
9870 Zulte
NETHERLANDS ORGANISATION FOR APPLIED SCIENTIFIC RESEARCH - TNO
Netherlands
Address
5,Schoemakerstraat, 97
2600 AA Delft
POLYMAGE SARL
France
Address
Rue Voltaire 1
06000 Nice
Vidrios y Cristales Planos Sole S.L.
Spain
Address
13,Gran Canaria - Pont Major 13
17007 Girona