We put great importance to data protection and therefore use the data you provide to us with upmost care. You can handle the data you provide to us in your personal dashboard. You will find our complete regulations on data protection and clarification of your rights in our privacy notice. By using the website and its offers and navigating further, you accept the regulations of our privacy notice and terms and conditions.
Use Case
Affordable And Clean Energy
Industry, Innovation And Infrastructure
Responsible Consumption And Production
The main objective of this project in Cologne is to recover heat from sewage water and use it in decentralised local heating networks by supplying heat and domestic hot water (DHW) to local school buildings.
The Cologne case consists of three different operation sites; Wahn, Mülheim and Nippes. In all sites, sewage source heat pumps recover heat from sewage water. The main components of the system are: heat exchangers, water-to-water heat pumps, gas boilers and heat buffer tanks. One innovative part of the project is the heat exchanger, which is installed inside the sewage pipe. This indirect heat extraction technique is used in two of the sites (Wahn and Mülheim). In the third site, a direct heat extraction technique is used. This means, part of the sewage water is bypassed and pumped directly to the evaporator of the heat pumps.
Want to learn more about the lessons learned, financial details and results?
Log inPlanning time: 2 to 5 years
City of Köln (Coordination of Climate Protection)IVL Swedish Environmental Research Institute
Rheinenergie AGStebUHRIG Straßen und Tiefbau GmbHTH-Köln
Recycling waste