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Energy-optimised construction in refurbishment

Old buildings also have a future, because the greatest potential for energy savings is in the building’s fabric. The implementation of new concepts, materials and technologies in refurbishment is demonstrated in a whole range of exemplary refurbishment projects. Whether a large residential complex, a small residential building, office building or hall of residence, data acquired from scientific evaluation makes these pilot applications into models for consistent building refurbishment. Each project description is updated on an ongoing basis, and follows the project through its phases, from "planned", "refurbished", "in operation" and "evaluated", through to "optimised".

 

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Building type Schools
Project status: Phase 2
Framework project EnSan

Renovation of Detmold Vocational College to become an energy-plus school

Three school buildings and a sports hall are undergoing major renovation on the campus of the Vocational College in Detmold. The plan is to significantly improve the amenity value and room comfort. There are also ambitious goals for the energy efficiency of the buildings: the intention is to reduce the energy requirement by about 75 per cent and the heating requirement by as much as 94 per cent. The buildings are set to attain the plus-energy level by utilising solar power generation and district heating from predominantly biomass and combined heat and power generation.

Sanierung eines Universitätsgebäudes aus den 1960er Jahren: Mit der Sanierung des Lehr- und Institutsgebäudes auf dem Campus Süd des Karlsruher Institut für Technologie wird dieses zugleich umgebaut.
Building type Public buildings
Project status: Phase 3
Framework project EnSan

Renovation of a university building from the 1960s

The teaching and institution building is situated on the South Campus at Karlsruhe Institute of Technology. The building’s age meant that it was in urgent need of renovation, especially given its extremely high energy consumption. The user comfort also needed to be considerably improved. As part of the renovation, the building was rebuilt and restructured to enable it to be adapted with an enlarged usable space to the changed usage requirements.

Energy-Plus-School in Stuttgart-Rot: The Uhland School in Stuttgart-Rot was constructed in 1954. It is now planned to transform it into an energy-plus school, definitely a very ambitious project.
Building type Schools
Project status: Phase 1
Framework project EnSan

Refurbishment of a school in Stuttgart-Rot to an energy plus school

Most schools need to be refurbished during the next few years, including Uhland School in Stuttgart-Rot, which was constructed in 1954. It is now planned to transform it into an energy-plus school. This means that all energy required by the school shall be generated by the building. Despite a lack of local authority funding, the ambitious project can be financed with the help of sponsors and public funding. For the City of Stuttgart this is a pilot project; the intention is to use the results and experience gained for other refurbishment projects.

EnSan-Project Refurbishment of Hotel Campo die Fiori in Munich
Building type Special buildings
Projektstatus: Phase 5
Framework project EnSan

Refurbishment to become a sustainable hotel with a decentralised technology concept

In September 2011, a hotel chain opened its first hotel conceived as a green building that – located directly at Viktualienmarkt in the centre of Munich – is committed to the sustainability principles of the EU programme of the same name. The post-war building, which has undergone extensive refurbishment, has been designed in technical terms as an energy-efficient “electricity-only” building based on decentralised micro-heat pumps. This means that the energy required for heating, cooling and domestic hot water is largely provided by renewable energy and heat recovery.

Der Billing-Bau, ein Gebäude der Kunsthalle Mannheim aus dem Jahr 1907.
Building type Public buildings
Project status: Phase 2
Framework project EnSan

General refurbishment of the Kunsthalle Mannheim

Museums are usually monumental public buildings with architecturally ornate facades. They are often listed as historic monuments, which presents considerable hurdles for those carrying out an energy-efficient refurbishment. The renovation of a wing of the Kunsthalle Mannheim is intended to demonstrate the cost and energy savings that can be achieved with such buildings. The renovation will reduce the primary energy requirement for the Billing building at the Kunsthalle Mannheim by about 40 per cent.

Schule in Marktoberdorf: Das sanierte Hauptgebäude nach Abschluss der Arbeiten im Juli 2013.
Building type Schools
Project status: Phase 3
Framework project EnSan

School refurbishment and expansion – with success contracting

Refurbishment projects for schools and other public buildings often fail to meet in practice the energy goals envisaged during the planning. This is partly due to public tendering procedures, which mostly relate to the installation and commissioning of a facility. Qualitative goals and measures to ensure permanent quality assurance are not taken into account. New instruments relating to performance specifications and contracting have therefore been developed ahead of a refurbishment project. The resulting “success contracting” concept was then tested in practice as part of the refurbishment and expansion of a school in Marktoberdorf.

Nürnberger Stadtbibliothek: links der neue Zwischenbau, rechts der sanierte und aufgestockte Bestandsbau.
Building type Special buildings
Projektstatus: Phase 5
Framework project EnSan

Nuremberg City Library - conversion and general refurbishment

The Luitpoldhaus, erected in 1911 and reconstructed in the 1950s after having been largely destroyed, will now be refurbished. The project will merge the various library functions at this central location in Nuremberg. To this end, the buildings will also be converted and extended. The storage of manuscripts, incunabula, prints and maps from the Middle Ages requires sophisticated air-conditioned rooms.

Das Max-Steenbeck-Gymnasium in Cottbus wurde grundlegend saniert: Für das Max-Steenbeck-Gymnasium in Cottbus wurde eine Typenschule der ehemaligen DDR gründlich modernisiert. Das Gebäude wurde nach Passivhaus-Standard ausgeführt.
Building type Schools
Projektstatus: Phase 5
Framework project EnSan

Refurbishment of a system-built, precast concrete school

A secondary school wants to move. However, the new building is actually an old one. The double-winged system-built school with an assembly hall and gymnasium dates back to 1974. The precast concrete building is currently being gutted and renovated in accordance with the passive house standard. From 2012, it will become the new home of the Max Steenbeck Secondary School in Cottbus. The renovation project is considered to be a model for other schools since the building type is widespread in the region and the new school is relying on innovative concepts and technologies.

Building type Industrial and commercial buildings
Project status: Phase 3
Framework project EnSan

Derelict factory building transformed into energy-plus building

A company from the solar power industry has renovated a derelict factory building – and with such thoroughness that it has now been transformed into a multifunctional energy-plus building. The developer is now using the building in Hanover as an office building with generous production and storage areas. It generates more energy than it requires itself. The office wing has thermal protection according to the passive house standard. The building is completely heated and air-conditioned using solar electricity, solar thermal energy and wood pellets.

Building type Schools
Projektstatus: Phase 5
Framework project EnSan

Comprehensive refurbishment of a school listed as a historic monument

The school in Olbersdorf provides an example of a successful compromise between historic conservation and energy-based refurbishment. In order that the building, which was constructed in 1928, could also be used in future as a school, it was necessary to considerably reduce the energy costs. The most important starting point was to provide consistent thermal protection for the building.