• DE | EN
Menu
Kurztitel: EnEff:Wärme: DELFIN - Prognose der Auswirklungen dezentraler Einbindung von Wärme aus erneuerbaren Energien und anderen Wärmeerzeugern in Fernwärmenetze
Ausführende Stelle: AGFW-Projektgesellschaft für Rationalisierung, Information und Standardisierung mbH
Förderinitiative: Energieeffiziente Wärme- und Kältenetzte (EnEff:Wärme)
Laufzeit: 01/2016 bis 06/2019
Bewilligte Summe: 302.873 €
Förderkennzeichen: 03ET1358A
Topics: Decentralised energy generation, Heating & cooling networks, Energy storage, Operational management & energy management, Solar heat, Modelling & simulation
Innovation: Model-based methods for predicting how the decentralised integration of solar thermal energy and other volatile heat generators can affect the operation of and components for existing district heating systems
Keywords:
Kurztitel: EnEff:Wärme: DELFIN - Prognose der Auswirklungen dezentraler Einbindung von Wärme aus erneuerbaren Energien und anderen Wärmeerzeugern in Fernwärmenetze
Ausführende Stelle: Technische Universität Dresden - Fakultät Maschinenwesen - Institut für Energietechnik - Professur für Gebäudeenergietechnik und Wärmeversorgung
Förderinitiative: Energieeffiziente Wärme- und Kältenetzte (EnEff:Wärme)
Laufzeit: 01/2016 bis 06/2019
Bewilligte Summe: 644.266 €
Förderkennzeichen: 03ET1358B
Topics: Decentralised energy generation, Heating & cooling networks, Energy storage, Operational management & energy management, Solar heat, Modelling & simulation
Innovation: Model-based methods for predicting how the decentralised integration of solar thermal energy and other volatile heat generators can affect the operation of and components for existing district heating systems
Keywords:
Kurztitel: EnEff:Wärme: DELFIN - Prognose der Auswirklungen dezentraler Einbindung von Wärme aus erneuerbaren Energien und anderen Wärmeerzeugern in Fernwärmenetze
Ausführende Stelle: Steinbeis Forschungs- und Innovationszentren GmbH - Solites Steinbeis Forschungsinstitut für solare und zukunftsfähige thermische Energiesysteme
Förderinitiative: Energieeffiziente Wärme- und Kältenetzte (EnEff:Wärme)
Laufzeit: 01/2016 bis 06/2019
Bewilligte Summe: 422.064 €
Förderkennzeichen: 03ET1358C
Topics: Decentralised energy generation, Heating & cooling networks, Energy storage, Operational management & energy management, Solar heat, Modelling & simulation
Innovation: Model-based methods for predicting how the decentralised integration of solar thermal energy and other volatile heat generators can affect the operation of and components for existing district heating systems
Keywords:

Quintessence

  • Simulation  tools  coupled  with a so-called  functional mock-up  interface (FMI) enable the  effects of integrating decentralised, volatile energy  sources into heating networks to be more  accurately forecast
  • Simulations of exemplary district heating networks are being used  to investigate the  current  situation as well as various  scenarios for the integration of volatile heat generators to estimate their  effect on the  network operation
  • New software modules  are developed  to take  into account  decentralised heat generators for network planning  and operation

In this project, researchers want to find out how an increasing number of decentralised heat generators affect the network hydraulics and thermal cycling of existing district heating networks, and whether heat storage systems need to be retrofitted. Software modules are being developed on the basis of statistical and model-based methods. This will enable volatile heat sources to be taken more into consideration in network planning and operation.

Project context

The economic conditions for district heating have changed during the course of Germany's Energiewende – its energy transition. Experts predict that district heating will play a particularly important role in securing heat supply in urban areas. There are an increasing number of ideas for integrating decentralised heat sources into district heating networks. However, there are still currently very few tools for planning and evaluating volatile, decentralised components in district heating, for example from solar thermal energy and heat from CHP and power-to-heat systems.

The precursor project entitled “Decentralised feed into local and district heating systems with special consideration for solar thermal energy” (DEZENTRAL) has been used to develop basic principles that will now be linked in-depth with practical issues. The main focus is on the effects of integrating solar thermal energy and other volatile heat generators on the operational management and components of existing district heating systems. Corresponding prediction methods are not yet fully developed.

Using time- and location-resolved simulations of typical district heating networks, the researchers are investigating the actual situation and scenarios with  increased shares of volatile decentralised heat sources in the respective  networks. This is being done in collaboration with district heating companies, scientists and commercial software providers.

Fictitious district heating network with existing central CHP generator structure and different locations for decentralised heat generators

Fictitious district heating network with existing central CHP generator structure and different locations for decentralised heat generators

© AGFW

Research focus

The main objective of the DELFIN project is to develop tools that can predict in suitable simulation environments how the thermo- hydraulic conditions in district heating networks change through incorporating volatile, decentralised heat generators and provide information on this. Here it is intended to realistically reflect both the effects on the existing generation units and components – for example circulation pumps, pressure maintenance, pipe systems – as well as the effects of different storage locations.

Simplified depiction of a balancing area for a district heating network and the investigated technical variations

Simplified depiction of a balancing area for a district heating network and the investigated technical variations

© TU Dresden, GEWV

Central idea and approach

In order to achieve the research goal, volatile producers are being modelled and simulated as a first step. The resulting models and profiles will characterise the temporal variability of parameters that are important in practice. These include, for example, the mass flow and temperature of the heat fed into the district heating network. These new generation models and profiles will then be integrated into different simulation models for district heating networks. This will be used to assess the current and future impact of an increasingly decentralised heat production.

Based on actually existing district heating networks, the effect of increasingly decentralising heat generation will then be investigated for different climatic conditions. Through targeted simulation studies, this will allow to identify the (primary) energy efficiency effects and the technical boundary conditions and determine sensible storage integration solutions. The project is therefore also assessing the influence of decentralised heat generators on the system efficiency and also intends to provide information on how this influences the cost-effectiveness of the heating networks.

Examples of simulation results for a 2.2 MW secondary network

Examples of simulation results for a 2.2 MW secondary network

© TU Dresden, GEWV

Purpose and aims

Application area Planning of district heating networks, expansion and operational management strategies
Outlook Following the project, it will be potentially possible to test and refine the project results on the basis of practical cases.
Modelling & simulation Heating networks with an increasing number of volatile, decentralised heat generators will be simulated thermo-hydraulically in a place- and time-resolved manner.
Economic efficiency analyses Simulation results form a basis for balancing the changes in the energy demand (final and primary energy) and CO2 emissions as well as ongoing operational costs.

Testing and application

The simulation tools and models used for the actual situation have largely been tested in practice or tested with practical data. A supervising project committee representing energy supply companies is ensuring that the investigation of decentralised heat integration also integrates practical aspects into the project. The results of the research project can then be transferred and applied by heating network operators to their situation. Selected software components will be available free of charge.

Application-ready product or process

Application conditions, possibilities The project findings will enable providers of district heating network simulation software to consider volatile heat generators or integration profiles in their simulations.
The project findings will inform the district heating industry and government about the necessary boundary conditions and expected effects of a technically possible and ecologically sensible decentralised integration of volatile heat generators in heating networks.
Reference address / Download The project is currently in progress. The findings are set to be published in 2019.

Last Update: 9. August 2017

Related Projects

This website uses cookies to improve our service. For usage analysis we use Matomo. By further using this site you agree to this use. If you don't want to give your consent or you want to learn more about cookies see our privacy policy .

OK