Building automation – impact on energy efficiency - Siemens ...

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Building automation – impact on energy efficiency - Siemens ...

Remarks of Siemens

This section outlines how Siemens interprets the functions and processing

functions according to EN 15232:2012.

1. Reasons for blind control:

Reduces external light can prevent blinding room users.

Reduces heat radiation in the room saves cooling energy

Allowing heat radiation in the room saves heating energy

Closed blinds reduce heat loss in the room.

2. Using shadow-edge tracking or sun-tracking individually or in combination

provides solar protection from direct solar irradiance resulting in lower heat

gain and at the same time uses indirect and diffuse sunlight for daylight harvesting

in combination with automatic light level control (see 5.2-1)

3. The key component is a presence detector with three control channels for

HVAC, lighting and solar protection. Coordination between lighting and solar

protection control is achieved via the light level in the room. Coordination

between solar protection control and HVAC is achieved via the room temperature.

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