Mattes & Düxx, Office Campus Deutz, Cologne | Germany

STRABAG Real Estate is developing the approx. 10,500 m² site at Siegburger Straße 237–239 with a new building project. The development comprises two independent office buildings: the perimeter block structure “Mattes” (4 to 6 storeys) in the northern section of the site and the high-rise “Düxx” (4 to 16 storeys) in the southern part. A shared, two-level underground car park is being constructed beneath both buildings for joint use.

ZWP is responsible for the planning of the entire Technical Building Services (TBS) up to detailed design (HOAI stages 1–5), including lighting design.

From a technical perspective, the two buildings are largely self-sufficient, with the exception of the medium-voltage systems, the sprinkler system in the underground car park and the BOS (emergency services radio) system. Both building sections are intended for office use. A consistent flexibility concept allows for a wide range of office layouts – from cellular offices and open-plan solutions to hybrid forms. Heating, cooling, ventilation, electrical and IT and communications systems are distributed along the building axes, enabling free positioning of partition walls within each tenancy unit. The sprinkler system in the high-rise and the fire alarm technology are preconfigured to allow future adaptations to changing room layouts without the need for structural modifications.

The building services plant rooms are functionally separated and located in the basement levels and on the roofs of both buildings. Ventilation and air-conditioning systems are primarily located on the rooftops; only the ground floor to the 5th floor of the high-rise are supplied from plants in the basement. All other plant rooms – with the exception of the cooling tower and the emergency generator in the high-rise – are also housed in the basement.

Regenerative energy is used for heating and cooling: geothermal energy – extracted via injection and extraction wells – supplies heat pumps that provide the required energy efficiently. During transitional periods, a free  cooling function enables additional energy savings. Concrete core activation is used in both buildings to provide basic temperature control in summer and winter. Peak loads are covered by radiator units in the block building and by underfloor heating and cooling near the façade in the high-rise. Ventilated office areas are supplied with ducted air via overflow elements; extract air flows back into the corridors through these and is removed centrally.

Each tenancy unit is served separately. Energy consumption is measured per unit. Within each unit, distribution runs through the corridor zone’s suspended ceiling, the raised floor, or embedded conduits in the concrete. Workstations are supplied with electricity via floor boxes. Workplace lighting is provided by floor-standing luminaires. In addition to full LED lighting throughout, a photovoltaic system is planned for the “Düxx” high-rise.

Bilder: © HH Vision