CHILL: Future-proof district heating and cooling networks on very low temperature for neighborhoods

Future-proof and attractive energy systems with VLT district energy

The heat transition in the built environment is a major challenge. Both collective and individual solutions are currently insufficient to achieve the climate goals. In collective solutions, this is due to high costs, complex planning and a lack of confidence in the current heating networks.

A very low temperature (VLT) network offers opportunities for future-proof energy systems in the built environment. It integrates heating, cooling, and electricity to provide the most attractive offer possible.

This new generation of collective heating technology often works with lower temperatures and fits in well with the changing needs for our energy supply, such as the increasing demand for cooling and decreasing demand for heat.

Innovative solutions and technologies

Very low temperature (VLT) networks combine heating, cooling and individual heat pumps. They offer numerous advantages:

• better integration of local residual heat sources;
• fewer heat losses;
• possibility of cooling;
• easier installation with flexible pipes;
• relatively little space required underground;
• less dependence on central energy sources.

In addition, VLT networks are future-proof, because they support both heating and cooling and they are less dependent on central (fossil) residual heat sources. They fit in well with the upcoming electrification of the built environment due to the possibility of putting excess electricity in the form of heat or cold into the local network.

The lower network investment costs and the possibility of connecting energy sources at different times also give residents the opportunity to connect at their own time. The planning and investments in new infrastructure can thus naturally match the times when residents want to connect to a heating and cooling network, which reduces many costs and uncertainties. This makes it more attractive to connect, which accelerates the heat transition.

TNO’s role and collaborative efforts in the CHILL project

Together with partners, TNO focuses on a standard approach for the development and implementation of very low temperature networks in the CHILL project.

By offering concrete handles and tools for these systems, and comparing them objectively with alternatives, this project contributes to the development of practical implementation plans for Dutch neighbourhoods.

Social and economic impact of very low temperature networks

Together with cases in five major cities and 25 partner organizations, a standard approach is being developed in the CHILL project for the construction and roll-out of these VLT networks.

We are developing standards in the construction process, developing a system design, organization, governance and financing. A selection aid is also being developed for measures in buildings and the moment that residents want to connect. In this way, efficient implementation plans are developed for scaled-up roll-out of very low temperature networks.

Looking to future-proof your plans for the energy transition in the built environment? Discover the potential of very low temperature heating networks and collaborate with TNO on innovative energy systems.