In Vienna, many new urban development areas are currently being built. At the same time, the city is oriented towards smart city goals, which also take into account a reduction in CO2 consumption for housing. Using the example of the Donaufeld urban development area, it was analyzed which options of the energy supply are possible, largely involving renewable energy sources at the location. This study should serve as a basis for decision-making for the actors involved (planning departments, developers, etc.).
Within the framework of the project, a general method was developed and used, which can also be applied to other urban development areas and serves as an instrument for energy planning. On the basis of energy economic and ecological evaluation criteria, suitable energy supply options were worked out and evaluated together with the client. For promising solutions, requirements for the developer competition are formulated.
The energy supply options were developed cooperatively with the involvement of key stakeholders: MA20 Energy Planning, Vienna Energie, Housing Funds Vienna, MA25 Urban Renewal and Testing Office for Residential Buildings, TINA Vienna Energy Competence Center
Result of the project are realizable solutions for the energy supply, with focus on the heat supply, for the borough Donaufeld. The solutions include a technical description, the impact on energy consumption, CO2 emissions and life-cycle costs.
The result shows that compared to existing solutions with district heating and gas boilers in buildings, concepts with heat pumps and geothermal energy use are technically, ecologically and economically reasonable. These concepts are based on a higher use of local renewable energy resources and also allow the passive cooling of the dwellings, which is necessary for the regeneration of the geothermal probes. These concepts can also address the varying availability of electricity from renewable sources. In addition, dependence on fossil energy resources from abroad is low and security of supply can be improved.