Institut für Energiesysteme und Elektrische Antriebe, Arbeitsgruppe Elektrische Anlagen
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Through decentralized coupling of existing infrastructure in cities (electricity-, gas- and thermal network) additional potential for energy saving can be tapped. The previous project, "Symbiose", focused on household customers. In this project, the focus is on urban structures and the consideration of industrial and commercial customers. This ensures that all urban customer groups are represented and detailed statements on energy savings – due to decentralized couplings and storage – can be achieved.


The further development of renewable producers is essential for achieving the "2020 targets" in Austria [1]. Wind power, photovoltaic (PV) and biomass are the predominant propagating renewable “generation technologies". However, the existing electricity grid is not designed for the volatile feed-in of wind power and PV, which is only partially controllable. In the research project "Symbiose" (FFG number: 834635) the role of cross-system, distributed storage- and conversion technologies for distribution networks (medium and low voltage network) in an entirely renewable model regions in terms of power and heat (city, country) was investigated. The project showed that a proper of storages leads to a higher share of possible renewable generators in the existing electric grid. The coupling of existing energy infrastructure mainly took place at the consumer side and allowed a significant reduction in total energy import from higher grid levels. In project “Symbiose”, however, only the behavior of domestic consumers and agriculture was considered. In both model regions industrial and commercial customers were not taken into account.

Industrial and commercial customers have specific consumption pattern, which can be significantly different from household customers in terms of load characteristic, power and energy needs. Similarly, the final energy consumption in Austria represents approximately 1.5 times the household consumption [2]. Thus an extension of the model of "Symbiose" by further customer groups seems reasonable. With the integration of industrial and commercial customers from the city larger shifting potentials between different forms of energy (electricity, gas and heat) could be achieved. This would lead to different distributed storage requirements for this region. In addition, further potential for the coupling of existing energy systems due to the purchase of different energy sources for this customer group could be achieved. In this way an optimal distribution of renewable energy sources in the city could be achieved and thus the added value of the city is maximized.


Project Objective

The aims of the project "Symbise-4-Industrie und Gewerbe" are:

  • to achieve an higher overall energy efficiency and optimal usage of renewable energy sources for the region city and its players (stakeholders). This is realized through the coupling of different energy sources (electricity-, gas- and heating system) in the energy grid and on the consumer side.
  • to determine the decentralized storage demand considering conversion technologies for the coupling of existing infrastructure and shifting potentials for commercial and industrial customers.
  • to highlight the potential of coupled infrastructure for the industrial and commercial sector.
  • to show the effects of the coupling of energy grids on network operations.
  • to determine potentials for reducing import dependency and CO2 emissions for the city of the future when implementing the ideas of “Symbiose-4-IuG”.



Project Members

Project Lead:

Project Partners:

  • TU Wien, Institute for Energy Systems and Thermodynamics
  • MPREIS Warenhandels GmbH
  • Vorarlberger Energienetze GmbH



From 01/2016 till 12/2017

This project "Symbiose4-IuG" is funded by the BMVIT and is conducted within the research programme "Stadt der Zukunft". "Stadt der Zukunft" is a research- and technology-program of the ministry for transport, innovation and technology. On behalf of the BMVIT it is handled by the Austrian Research Promotion Agency in cooperation with the Austria Wirtschaftsservice Gesellschaft mbH and the Austrian Society for Environment and Technology ÖGUT.

This project is dedicated to the following research area: Universal Grid