Renewable Energy Sources:
- Solid biomass
Low Carbon Technologies:
- Biomass Boiler
- CHP with Biomass Fuel
- District Heating
- Heat Pump
- Hydro Power Station
- Information Technologies (Municipal Energy Management + GIS)
- Mechanical Ventilation & Heat Recovery
- Sorption Cooling
Technologymix implemented in this CONCERTO site:
In the course of the project more than 37 kWpeak of new photovoltaic equipment was installed. The most important unit has been integrated in the building containing the combined wood heat and power plant, where both its south façade and the complete flat roof have been equipped with dark mono-crystalline modules. A hydropower system at a high-rise freshwater storage tank has been installed and shows a constant energy output of about 220.000 kWh per year.
A wood chip power plant designed for 6 MW output in permanent operation (Picture 1), provides the major portion of the energy supply for the Scharnhauser Park development project. At peak periods and as a reserve, two natural gas boilers (5 and 10 MW) are additionally available. Each year 80 % of the heating energy and approximately 50 % of the electrical power needed for 10,000 inhabitants are produced. Through substantial modernizations and extensions at an existing district heating network of the former military base it now spreads over a length of more than 13 km and enables all the inhabitants of the Scharnhauser Park to use this environment-friendly technology.
As the first plant of its kind in Europe a lithium-bromide refrigerating machine has been installed in the new office building “Elektror” in Scharnhauser Park (Picture 2). The unit is supplied with the heat from the above-mentioned DHS. The plant will possess a cooling capacity of 150 kW and will be connected to a modern system for concrete core activation. Due to the relatively high maximum cold water temperatures (9° C and 15° C), this system enables a high efficiency of the chiller.
In the frame of the POLYCITY project a total of 178,000 m² of residential and commercial buildings has been constructed. The “Scharnhauser Park” (Picture 3) can be divided into three different areas: tower houses in the north, individual row houses in the east and four-story multi-family houses with extensive green areas in the west. The following measures led to high efficiency: reinforced exterior wall insulation, windows with improved environmental values, low temperature floor heating, living space ventilation and quality controls using Blower-Door-Tests.
Beside the “Elektror” office building various other ambitious buildings have been constructed like the “City House”, the School Centre and the Youth Centre in Ostfildern. At the Youth Centre the opaque parts of the building envelope were implemented to comply with passive-building standards and the windows were designed according to low energy building standards. Thereby a very low annual heating demand of 32 kWh/m²a could be achieved, which is provided by a heat pump with geothermal boreholes as heat resource. Additionally a mechanical ventilation system with heat recovery capability and a ground-to-air heat exchanger have been installed.
In the field of information technologies a municipal energy management system for a total gross floor area of 21,000 m² has been implemented and for presenting monitoring results an interactive web-based GIS system has been installed.
Picture 2 -
The “Elektror” office
Picture 3 -
Aerial view of