Research Project CoolDown

Optimization of piped heat supply in existing buildings and efficient integration of renewable heat sources into the networks through secondary measures. Sub-project: Overall coordination of the network. Analysis of measures, scientific monitoring of implementation.

Project objective

The overall objective of the CoolDown project is to collect and validate suitable measures for the rapid and practicable transformation of heating networks with a focus on the secondary side and (existing) buildings. To this end, the technical, regulatory and economic requirements will be identified and evaluated in detail.

Research questions

• Which technical measures and technologies (TRL 6-8) can be used to further reduce return temperatures beyond the limits defined in the technical connection conditions?
• How can efficient, non-optimally operating consumers/buildings be identified using data analysis of meter data?
• Which generators (sizes) and which control concepts are suitable for an economical subsequent secondary temperature increase and how are these implemented?
• How can the results of the project be efficiently disseminated in the sectors involved (building services, building management, district heating operation) and how can appropriate training measures counteract the shortage of skilled workers?

In addition to the listed central project objectives and using the scientific and technical methods, the following sub-objectives are planned in the project as a basis for future investments:

• Development of practical and coordinated guidelines for the rapid conversion of heating networks with a focus on secondary measures
• Development of data-based identification of non-optimally functioning consumers (buildings) and the development of digital business models
  
• Potential assessment with regard to energy, hygiene, economy, environment (CO2) of the measures under consideration
  
• Laboratory testing of systems available on the market, verification of function and effectiveness, development of operational management strategies/control concepts
• Implementation of best practice examples, validation of the methodology, monitoring
• Preparation of training documents and measures for dissemination in the sectors
  

Project structure

The project is divided into the following areas:

• Market analysis and needs assessment
• Methods and technologies for return temperature reduction
  
• Model calculations of typical buildings and grid feedback
• Laboratory tests of the technologies
• Operating concepts
• Concepts and implementation support
• Scientific support and monitoring of demonstration projects
• Creation of guidelines and training concepts
  
• International knowledge transfer and coordination of the new IEA DHC Annex TS9
• Project support measures

A key aspect of the project is the dissemination of the project results in the participating sectors. Practical and coordinated handouts are being developed that offer solutions for the rapid conversion of heating networks with a focus on secondary measures. In addition, training documents will be produced to inform the trade about the new solutions and promote knowledge transfer.