Building EQ
Member Area
User
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Ministry of Economic Affairs and Energy of the State of North Rhine-Westphalia, Düsseldorf (Germany)

Building owner
The "Bau und Liegenschaftsbetrieb" is a public owned company that is responsible for the facility management of all buildings belonging to the state of  North Rhine-Westphalia.
www.www.blb.nrw.de

User
Ministry of Economic Affairs and Energy of the State of North Rhine-Westphalia.

Utilisation
The building´s main use is for administrative purposes with offices, conference rooms and a canteen. Most offices are naturally ventilated while most of the conference rooms and the cantine are air-conditioned. Other special uses include a library, a server room, an archive in the basement and a print shop.

Building concept
The building consists of two parts: A tower block with 18 floors and an adjacent L-shaped building with 7 floors. Both parts have classic facades and a basement. Approximately 70% of the whole building is used as office space(mostly single room offices).  Archives and the technical installations for heating and cooling are situated in the besement.  Most of the air handling units are installed on the uppermost floors of the building.

HVAC concept
The majority of the building is heated by radiators which are supplied by district heating. A central compression chiller supplies most of the air handling units which provides cooling for the special use areas like conference rooms and the canteen. Additional compact water chillers and split systems supply further areas like the server room. The building has more than 10 air handling units for the different special use areas.

General data

Owner Bau- und Liegenschaftsbetrieb NRW
Year of erection 1953-1961
Use Office building
Net floor area 30.000 m²
Consumption of electricity 1.300.000 kWh/a (2006)
  44 kWh/(m²a)
Consumption of heating 2.400.000 kWh/a (2006)
  80 kWh/(m²a)
HVAC equipment heating, cooling, ventilation, air conditioning,
  building automation system
Energy source district heating

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South view
Tower
South view
East view
3-dimensional model 1
3-dimensional model 2
floor plan
transfer station district heating
compact water chiller
main distribution heating system