CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
The market of daylighting systems is still growing, thus generating a need for evaluation and test procedures for the performance of the different systems. Two issues are crucial for the success of any integrated daylighting/controls system:
- User acceptance.
- Energy savings.
For the testing of the user acceptance two procedures have been developed and validated:
- Objective testing in office rooms equipped with the system.
- User assessments in a static virtual reality.
Both methods show that there is nothing like a "typical user", but at least two parameters seem to be crucial for user acceptance:
- View contact with the outside.
- Glare protection (especially for VDU workplaces).
For the energy savings prediction a combined thermal and lighting simulation procedure has been developed. A well-defined optical and thermal model has to be set up in advance. A suitable test procedure to get the models has also been designed. Some general restrictions of the simulation tools lead to a great effort needed to develop the models. With the simulation models, the energy performance of a well-defined case can be calculated. There is no general ranking of systems possible, as the ranking would be different under different boundary conditions. These conditions are:
- Geographic and climatic position of the building.
- The orientation of the rooms.
- Obstructions through buildings or trees nearby.
- Design of the room (especially the room depth, colours).
- Design value of the illuminance that is needed (e.g. office or floor).
- Occupancy hours (e.g. office hours or half day school).
- Whole year energy efficiency or seasonal accents (hotel, summer school).
For a lot of the available systems it is now possible to evaluate the important issues, such as user acceptance and energy savings.
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