Jobcenter und Dachgewächshaus, Oberhausen, Germany

Object Type
Office Buildings

Client
OGM Oberhausener Gebäudemanagement GmbH, Oberhausen Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik, Oberhausen

Architects
Kuehn Malvezzi, Berlin

Completion
2019

Expertises
Thermal Insulation & Energy Performance Calculation
Sound Isolation
Room Acoustics

A hybrid building consisting of a job center and a rooftop greenhouse, a federally funded pilot project for local food production, was built on the Altmarkt in the Ruhr district city. The new building houses a reception area on the first floor with a waiting zone, customer service areas and a café. The four upper floors are primarily used for the Job Center's administration. Including the building façade, a vertical garden connects the standard floors with the glass roof structures.

The integration of a rooftop greenhouse on an administrative building represents a special type of building. It was important to both the clients and the users to make use of the climatic synergy effects. This is why the climatic interactions are at the forefront of the thermal insulation energy concept. The use of waste heat from the building to heat the greenhouse has an effective effect on the energy balance, while the CO2-enriched air also promotes the growth of the plants. Thermal simulations were used to take a closer look at the greenhouse in terms of ventilation when it heats up in summer. Adiabatic cooling and suitable rear-ventilated sun protection underneath the glass roof ensure an optimized climate. To ensure the desired room acoustic comfort in customer-relevant areas of the job center, sound-absorbing perforated trapezoidal sheet metal profiles were specially developed for the underside of the ceiling.

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