ombra BST - on the sunny side with sun tracking control!


ombra BST knows the position of the sun!
Flat Blade angle at noon!
Steeper position in the evening!
Shadows will be considered!

The e.control sun tracking system perfectly combines the contradictory demands for glare-free work and the use of daylight. The ombra BST sun tracking controller is the core piece which has been developed in cooperation with the Gelsenkirchen Polytechnic*. It knows the exact position of the sun every single day of the year and at all times and is thus in a position to adapt the blinds of a building ideally to suit the position of the sun. In this way maximum daylight is ensured without the sun’s rays being able to enter the room directly. The additional brightness that may be required can be obtained through an e.control constant light control by adding artificial light. The advantages of sun tracking are obvious:

▸ maximum use of daylight
▸ reduced room heating
▸ reliable glare protection.

Since all e.control blind actuators are suitable for sun tracking, it is sufficient to equip the building with the ombra BST sun tracking control system. Based on the outside brightness, which is provided by the ombra WSx sensor unit, this device decides whether antiglare protection is required on a façade or whether the blinds remain in a definable waiting position – and that for a maximum of 15 independent façades and/or blind types. ombra BST thus also works for highly exacting building geometries, such as oblong or round layouts.

For buildings surrounded by other buildings, there is also the possibility of calculating shading corrections. This makes sure that only those slats which are actually in the sun are moved into position. Blinds which are in the shadow of surrounding buildings move the slats to a fully horizontal position to enable an unobstructed view and maximum daylight provision. To implement this, the e.control plug-in for shading correction is required which in turn needs the geometric data of the shadow-producing buildings and the dimensions and position of its own windows. On this basis, it creates shading-relevant geometric data for each window or group of windows and stores the data in the actuators. Since all e.control actuators can process the data, no additional hardware is required.

* Laboratory for Building Automation at the University of Applied Sciences Gelsenkirchen