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Profile: Daylight simulator for realistic sky conditions inside model rooms - 2010-0666

Input date:	Monday, February 15, 2010	Last update:	Monday, February 15, 2010
Deadline:	Saturday, February 05, 2011
Type of profile:	TO
Title:	Daylight simulator for realistic sky conditions inside model rooms
Abstract:	A German engineering office in cooperation with research institutes has developed an artificial sun and artificial sky to simulate realistic sky conditions. The unit can be used for simulation, monitoring and examination of daylight and shadows in model rooms and buildings which is important for the rational use of energy. Potential users are e.g. departments of architecture and construction physics, light competence centres, universities. The group is open to all kinds of cooperation.
Description:	In order to correspond to a realistic prescribed sky according to DIN CIE and, among other things, to simulate different cloudy appearance situations and sloping shining density from the zenith to the horizon, both an artificial sun (KSO) and an artificial vague sky (KHI) are necessary. Therefore a group consisting of an engineering office and research institutes has developed an accessible daylight laboratory. The prototype has a diameter of 4,2 meter. However, it can be adopted to the size of the existing available room and space. Inside the laboratory, aspects of daylight and solar irradiation as well as their effect on interiors, on the interior climate and on urban buildings, are simulated and optimized. The daylight laboratory makes it possible to simulate each position of the sun (KSO) and different scenarios of a covered sky (KHI) by EDP equipment. A tiny video camera and/or a highly soluble endoscope camera with special optics, which can be integrated into the model, take the position of the later user. The sequence is recorded and can be further processed in the video laboratory. The daylight laboratory consists of an artificial sun KSO, and of a covered sky KHI. For measuring and documentation purposes particularly developed video systems are used. With the KSO the dimmed light of a special lamp is cast over a large parabolic reflector as parallel radiation in the model. Via the interface a software controls the brightness of the sky parts as well as the conditions and the intensity of the sun. The KHI is controlled by a large number of switches via 360 continuously dimmable (1 % -100 %) fluorescent lamps of highest colour reproduction quality and a colour temperature of 6.000 Kelvin which equals daylight, the lamps have an illumination intensity of 100.000 lx maximum, the hemisphere is translucent and the unit has a diameter of 4,2 m. The external hemisphere of the KHI consists of reflection sheet metals for light scattering and heat dissipation, the interior hemisphere of the KHI consists of highly transparent, well strewing diffusers. A self-developed highly soluble camera system with a special endoscope for architecture supplements the unit. The unit is very useful for Universities e.g. in the areas architecture, interior decoration, town construction, building physics, institutes for daylight planning, authority centres for light, large architect's offices etc. as it can be applied for energy-optimized buildings, solar architecture and urban planning, optimized daylight planning in architecture, climatic architecture, energy efficiency planning of buildings, passive solar energy use and many more. Innovative Aspects: The unit represents a prototype that has been tested for over four years and which is based on newest developments and advanced technology in material and control technique. The EDP-controlled programme can simulate each position of the sun. With the help of the artificial sky, any dynamically changing cloudy appearance situation and (from the zenith to the horizon) dropping light density will be produced additionally. Thus, the system makes it possible to examine aspects of daylight and shading at a very early planning stage. Further on, the results can be processed and documented digitally. Advantages Economic advantages: Good price-performance ratio. Economical unit by use of system parts, small power requirement. Handling: Due to sophisticated programming, handling and control are very simple and adapted to the special requirements of architecture and building physics. Training and didactics: The unit serves as a tool for a qualified understanding of climatic architecture and building engineering e.g. for students of architecture. Health and perception: The optimal use of daylight is a basic condition for perception, well-being and health. The offered unit helps to develop this healthy environment in urban buildings. Energy and lasting effect: In the early phase of a project, data are predetermined, which will specify the energy consumption later on. In this early phase, the results from the examinations with the daylight laboratory can be used in order to avoid negative effects on the energy consumption later on. Current Stage of Development --------------------------- Available for demonstration - field tested RTD programme --------------------------- None Intellectual Property Rights --------------------------- Secret know-how Organisation/Company Type --------------------------- Other Organisation/Company Comments --------------------------- engineering office in cooperation with research institutes Application Domain(s) --------------------------- Market Applications --------------------------- MA Keywords: Energy Conservation Related; Construction services; Other construction and building products related; MA Keyword Codes: 006008; 009007005; 009007006; MA Highlights: The unit is e.g. used at universities for education and training in the fields of architecture, interior decoration, town construction etc., for optimized daylight planning in architecture and energy efficiency planning in buildings. Collaboration Type --------------------------- Joint Venture Agreement; License Agreement; Financial Resources; Joint further development; Adaptation to specific needs; Assembly; Engineering; Collaboration Comments --------------------------- - Type of partner sought:industry or research - Specific area of activity of the partner:architecture, light competence centre - Task to be performed by the partner sought:depending on the kind of co-operation. Above all the engineering office is interested in a know-how transfer, however, they would eg. also be prepared to carry out the assembly etc. Country of origin --------------------------- Germany
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