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Challenge / Goal

The overall goal was to overcome hurdles in insufficient power generation. The inclusion of the Dunker solar plant is important as heat is supplied to a district that cannot produce enough renewable energy on-site to cover the heating demand establishing a virtual Renewable Energy Sources (RES) generator.

The tasks were:

  • Energy efficiency
  • Improve the economy of existing generation plants
  • Reduce/optimize operating expenses of the district heating network
  • Approval for the construction
  • Phase of entry into operation/commissioning


The solution allowed the microgrid to be upgraded to function as a city-wide virtual power plant. Additional involved tasks included:

  • Integration of a solar thermal collector into the existing district heating infrastructure.
  • Integration of 1417 kWp PV (solar panels) and green roofs and engage flexible consumers and controllable energy storage systems.
  • Performing a feasibility study on the coordinating role of blockchain in local market dynamics.
  • Demonstration of load-balancing with an electric vehicle fleet in accordance with local grid needs.

It is hoped that the project will help make network integration feasible, as well as provide support for the selection of innovative technologies.

Citizen participation

The project approval process involved public displaying of information and feedback received, as well as information events for all new project steps.


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Time period

Planning time: 2 to 5 years

Implementation time: 2 to 5 years


SPARCS; City of Leipzig

Service providers

Leipziger Stadtwerke; Leipzig University

End users

District Heating Grid Operators

    Main benefits

  • Improving energy supply efficiency

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