Newsletter from the CELSIUS Initiative.
7771 Ny logga Celsius just celsius
View web version >  |  Go to our homepage >
1x1 7759 Markus m text
Heat pumps in district heating grids

Today there is great interest in using energy more efficiently in order to reduce greenhouse gas emissions. With this in mind, a solution to increase the share of renewable energy in district heating systems is to introduce heat pumps. This technology can be a way to connect different energy systems, such as the electrical grid, the gas grid and district heating grid; it can also be the link between the need for cooling and heating and the reuse of excess heat.

District heating, in general, and heat pumps connected to district energy grids, in particular, are predicted to play a key role in the energy systems and energy supply for the future. With implementation of district heating it is possible to cover up to 50% of the heating demand in Europe, and heat pumps can deliver around 25 % of the energy to the district heating grid, according to the Heat Roadmap Europe 4 project .

Heat pumps can be a key technology in the future district heating grids in different ways. For example, heat pumps:
  • can act as a balancing technology when the electrical production fluctuates.
  • make it possible to utilize low temperature energy sources, and waste heat in the district heating grid.
  • can phase out fossil fuels from the energy system.
  • make it possible to use very low or ultra-low temperatures in the district heating grids.
  • make it possible to minimize grid losses in the district heating grid.
7760 Loggor 780
IEA Heat Pumping Technologies Annex 47; “Heat Pump in District Heating and Cooling systems”
Today the Annex 47 regarding heat pumps in district heating systems is an important annex under the IEA Heat Pumping Technologies program because more and more countries have realized that district heating is a way to phase out fossil fuel.

Read more >
7763 FVZ2137WIEN640
Heat pumps and low temperature systems
Nowadays, due to the increasing potential of district heating systems at low temperature, heat pumps can be integrated into them with larger power ranges and for different temperature levels without significantly losing their efficiency.
Read more >
1x1 7780 Grafik LITEN
Hybrid heat pumps - A new way to combine Heat Pumps and District Heating
In the Swedish research project Heat Pumps in District Heating Systems new combinations of heat pumps and district heating systems have been investigated. In three sub-projects new possibilities have been explored for combining heat pumps and district heating.
Read more >
7751 600x330 lampopumppu 285 1x1
Helsinki: new underground heating and cooling plant utilises waste heat
The new heating and cooling plant is located under the Esplanade Park at a depth of some 50 metres.

A gigantic cooling accumulator of 25 million litres is also located in connection with the plant. Together they form the underground Esplanade cooling centre.
Read more >
Read more about heat pumps and district energy in the CELSIUS Wiki
General articles:
Waste heat from data centres
Waste heat from urban infrastructure
Waste heat recovery from sewage water
Case studies
Comparison of two different Case Studies about Introduction of Renewable Energy Sources in District Heating and Cooling Networks
Heat recovery from the London Underground
Waste heat recovery from sewage water in Cologne
7769 nature 3289807 1280 640
Join our webinars in March and April
“Heat-pumping the future of district energy” on Thursday March 28 at 10:30 CET. Sign up here:

“FED policies” – on the project Fossil-free Energy Districts, FED – on Tuesday April 16 at 10:30 CET

PlanHeat’s Final Event on Wednesday May 8 from 11:00 to 15:00 in Nantes, France – 20 city representatives will get up to 500€ of their travel expenses reimbursed!

Do you want information on CELSIUS webinars etc. sent to you by email? Subscribe below.
Subscribe to CELSIUS invitations >
Upcoming call for demonstration of instant district cooling
A consortium consisting of the International Institute of Refrigeration, the Danish Board of District Heating and PURIX, is preparing a funding application for demonstration of instant district cooling (district cooling powered by district heating) in the EU and are looking for stakeholders such as cities, municipalities, utility companies and others as demo participants with 70%-co funding.
Read more >
1x1 5165 write 593333 285
Contribute to our newsletter
The CELSIUS Newsletter aims to  improve the visibility of what is happening in our network. Solar energy and financial instruments for scaling projects are upcoming subjects. Maybe you have ideas about what you would like to read more about. Or would you like to contribute to the newsletter yourself?

Send an email to to give us input on how to give you the best content! Mail to
5198 icon 1798272 1x1
...and tell your colleagues to subscribe
Let your colleagues, business partners and friends know about the Celsius Newsletter.

To sign up for a subscription they can follow this link or simply click on the button below.
Subscribe to CELSIUS Newsletter >
CELSIUS Initiative: Accelerating the energy transition in cities
CELSIUS is a collaboration hub for efficient, integrated heating and cooling solutions supporting cities in their energy transition to carbon-neutral systems. CELSIUS gathers and shares technical, economic, social and policy expertise. CELSIUS allows members to connect, exchange and foster innovation, leading to solutions that accelerate sustainable development in Europe and across the world.

6852 Celsius pluppar 580
With financial support from:
7305 CELSIUS loggor
734 RISE logo transp
730 youtube 731 twitter 732 in
unknown link