Symbiose-4-I&C - Optimal decentralized hybrid storage technologies among different energy systems -4-Industry and Commerce

The project Symbiose-4-I&C analyses the coupling of existing energy networks/-carriers, established on centralized energy network nodes or directly next to a consumer (households, industry and commerce) and the benefits of applying decentralized storage technologies. The optimal position, dimension and the right storage and conversion technology and an optimal energy wide operation of larger consumer groups are going to be estimated for an urban model region.

Short Description


Starting point / motivation

The determination of additional measures for the integration of decentralized renewable technologies and the resulting reduction of energy import in an urban area are the motivators for this research.

The research project "Symbiose" investigated the role of cross-system, distributed storage- and conversion technologies for distribution networks of completely renewable model regions (a rural and an urban area). The project showed that with a proper storage capacity and storage operation, a high share of renewable producers in the existing electrical grid could be reached.

The consumer itself turned out to be the most suitable location for coupling the existing energy infrastructures. This allowed a significant reduction of total energy supply from upper grid levels. The examinations of "Symbiose" project were based only on the behavior of domestic consumers and agricultures. In both model regions industrial and commercial customers were not taken into account.

Industrial and commercial customers have a specific consumption pattern, which significantly differs from household customers in terms of load characteristic, power and energy demand. Thus an extension of the "Symbiose" model by further customer groups seems to be reasonable.

Contents and goals

Therefore, the "Symbiose-4-I&C" project takes into account a further consumer group, industry and commerce, in order to determine the potential of decentralized storage technologies and coupling of existing energy networks/-carriers in urban areas.

The aims of the project are:

  • to show that a higher overall energy efficiency and an optimal usage of renewable energy sources can be achieved in the urban region by coupling of different energy sources (electricity-, gas- and heating system) on centralized energy network nodes or directly next to a consumer. The consumer itself should benefit from this achievement as well.
  • to determine the remaining demand of decentralized storage technologies considering the installation of conversion technologies for coupling the existing infrastructures and the shifting potentials of commercial and industrial customers.
  • to highlight the potential and benefit of coupled infrastructures for the industrial and commercial sector.
  • to show the effects of coupling the energy networks on the networks operation.
  • to determine potentials of reducing the energy import dependency and CO2 emissions for urban areas in the future when implementing the ideas of "Symbiose-4-I&C " project.


To accomplish these goals, the energy system of the project partner MPREIS is investigated closely. Their loads and energy system are represented as dynamic models in an appropriate modeling software (eg Matlab, Dymola).

The energy system of the model region is adapted for the connection of several commercial and industrial customers. The regenerative potential determined in the preliminary "Symbiose" project is then distributed in the model region. Customers and decentralized generation are then included and the energy system of the model region is optimized.

The goal of optimization is to comply with technical limitations of the electrical grid, taking into account decentralized storage and conversion technologies and a conscious use of determined flexibility potentials of industrial and commercial enterprises even with a massive expansion of renewable energy sources. This will be done with minimal total costs of the energy system. The optimization is conducted considering the different perspectives of key stakeholders.

Expected results

First, the shifting potential of industrial and commercial customers is going to be investigated. The optimization will determine the location, installed power and capacity as well as the operational management of the installed storages and conversion technologies considering different stakeholders in the provided city model. The common benefit of all stakeholders is going to be calculated with the regard to the imported and exported energy as well as CO2 reduction. Ultimately, the obtained results will be applied to other cities in Austria.

Project Partners

Project management

TU Wien, Institut für Energiesysteme und Elektrische Antriebe

Project or cooperation partners

  • TU Wien, Institut für Energietechnik und Thermodynamik
  • MPREIS Warenvertriebs GmbH
  • Vorarlberger Energienetze GmbH

Contact Address

Technische Universität Wien
Institut für Energiesysteme und Elektrische Antriebe
Arbeitsgruppe Elektrische Anlagen
Univ.-Prof. Dr.-Ing. Wolfgang Gawlik
Gußhausstraße 25 / E370-1
A-1040 Wien
Tel.: +43 (1) 58801-370111
Fax: +43 (1) 58801-370199