To accomplish the set objectives, participants will research developments within the general framework of the following five subtasks.

Subtask A: Demand optimised Profiles (Business Models)


Subtask A is strongly focused on the exergy demand of single buildings as part of multifarious community supply systems. As part of the work, the previously developed exergetic assessment methods from IEA EBC Annex 37 and IEA EBC Annex 49 will be applied and further developed. The focus here is particularly on so-called LowEx system distribution and supply concepts of different building classes. Furthermore business models are part of this work. They are important to ensure the economic feasibility and realistic implementation environments.

Main work items:

  • Comprehensive and holistic consideration of buildings as a part of the community energy chain
  • Taking different building demand into account (matching quality demand)
  • Integration of LowEx technologies (Input from IEA EBC Annex 49 and
    IEA EBC Annex 37)

Subtask B: Sources and Supply


Subtask B provides the necessary framework for more detailed exergy analyses applied to sources and supply within communities through the development and identification of concepts allowing a flexible supply of different demands with maximum share of local and renewable energy sources. Thereby chances for an efficient use of decentralized renewable-energy based systems such as CHP units, heat pumps and solar thermal collector fields as well as surplus heat (secondary energy) are enhanced.

Main work items:
  • Integration of LowExergy sources (high share of RES and special consideration of (low temperature) DH technologies)
  • Taking fluctuations from different sources into account.
  • Shows the dynamic matching of available energy sources with existing demands (e.g. space heating and cooling)
  • In case of community heat supply by using district heating technologies integration of knowledge and experience (e.g. IEA DHC Annex TS1, IEA DHC Annex X)

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Subtask C: Model cities


Subtask C is focused on the interfaces between an advanced generation and supply of thermal energy as well as the optimised demand management within the community. The core issue is the identification of best practise examples of innovative techniques of communities based on input of Case Studies from the participants. Furthermore the realisation and development of “model cities” respectively case studies (requires input from participants e.g. from EBC Annex 51), are imaginable.

Main work items:
  • Identification of appropriate strategies and technologies with great potential for promoting integration between supply and demand.
  • Identification of best practise examples
  • Integration of knowledge an experiences from e.g. EBC Annex 51 (Case Studies)

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Subtask D: Assessment methodology


The main objective is to collect and further develop existing (exergy) assessment methods. This step is used to identify the most appropriate method (e.g. Excel Tools or Simulations Tools) for each user group. Based on the respective method it should be possible to display various stages of planning or design of buildings, groups of buildings and community supply systems.

Main work items:
  • Proposal for consistent assessment methodology for building energy systems
  • Collections of existing Tools and Methods
  • Integration of LowEx assessment methods (Input from IEA EBC Annex 49 and IEA EBC Annex 37)
  • Enlargement of the assessment methodology at community level

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Subtask E: Dissemination

See Dissemination


Operating Agents

Dr. Dietrich Schmidt
+49 561 804-1871

Christina Sager-Klauß
+49 561 804-1874

Further Information

Anna Kallert
+49 561 804-1876