Revitalisation of Kuhlenwall-Karree, Duisburg, Germany: giving old buildings new life.

Project
Revitalisation of an administrative building erected in 1976 as part of urban improvements to Duisburg’s city centre. The property is to be stripped to its core and subsequently transformed into a state-of-the-art building equipped with very advanced, energy saving technology and a new façade.

Task
the revitalisation project is to modernize the building while retaining as much of the original structure as is possible. For this reason, major components of the intact inner core as well as functional fixed points and areas with a large amount of installed equipment (kitchen, lifts, sanitary facilities, etc.) will be retained when possible.

The revitalisation project also aims at improving the exterior appearance of the building erected in 1976 by Sparkasse Duisburg. Over the course of the project, all of the exterior and interior components of the building will be removed, the structure stripped to its shell and then newly rebuilt utilizing modern building services engineering. The energy supply will be converted to environmentally friendly district heating. Additional expansion in the ground floor area will add new urban appeal to the Kuhlenwall-Karree’s existing interior courtyard while turning this area into the building complex’s focal point.

Project description
The key focus of the Kuhlenwall-Karree revitalisation project is to modernize engineering of the building services as well as to improve workplace conditions at the property. These are to satisfy the most advanced requirements in terms of thermal and acoustic comfort as well as safety. Other key aspects of the intecplan services include sustainable reduction in energy requirements and CO2 emissions as well as a lowering of operational costs.
Goals in energy savings will be achieved by connecting the building to the public district heating systems operated by the city of Duisburg’s utility provider. The installation of a high-efficiency adiabatic heat and cold recovery system will further facilitate savings in primary energy use related to heating and air conditioning services. The energy efficiency of the property shall be further enhanced by on-demand ventilation system controls as well as digital metering devices and technology enabling the centralized management of engineered building services. The use of natural stone and steel in the Kuhlenwall-Karree’s new façade will mean an upgrade in terms of visual appearance and urban appeal. The revitalized building will become a noteworthy contribution to the implementation of architect Sir Norman Foster’s master plan for Duisburg’s urban development which is to create a new, improved quality of life in the city’s urban centre.
Completion of the revitalisation project will mean the addition of 10,600 square meters of office and commercial space to be used by Sparkasse Duisburg and other tenants.

Project Facts:

intecplan Services: complete planning and supervision of building services construction

Principal: Sparkasse Duisburg

Architect: aib agiplan integrale Bauplanung

General planning + project management: SGE Stüdemann-Grundbesitz-Entwicklung GmbH

Initial planning: 2008

Completion: 2011

Construction costs: approx. 20 M euros

Plumbing: networks equipped with highly-efficient pump technology and sanitary facilities fitted with water-saving technology.

Heating: district heating supplied by local, combined heat and power plants. Heating panels as a parapet radiation system with automated room temperature control and wall mounted electrical duct system.

Ventilation: highly-efficient motor technology and demand-based control via CO2 sensors and variable volume flow regulators. Exploitation of environmental energy for spatial cooling. Heat and cold recovery as required in winter and summer as needed.

Electric: lighting implementing electronic ballast units.

Building Automation: digital metering and control technology for the centralized management of all systems.

Safety & Security: automatic fire detection and extinguishing system including alarms and the fire-retardant, smoke-tight sealing of new line channels and duct systems.