Thermal storage

Thermal energy storage can be subdivided into different technologies such as storage of sensible heat, storage of latent heat as well as thermos-chemical and absorption storage. Low-temperature thermal energy storage can be operated below 200°C and is mainly applied to heating and cooling of buildings and district heating and cooling (DHC) using waste heat from different sources or renewable energy sources.
High temperature thermal energy storage plays an important role in the integration of renewable energy sources, first of all the concentrated solar power (CSP) in the energy systems and in the recovery of high-temperature waste heat from industry. According to the length of time for which the thermal energy must be stored, systems can also be divided into ‘short-term’ (seconds-minutes) and ‘long-term’ (hours-seasons) energy storage.

List of projects where this technology is being implemented.


The STORM project tackles energy efficiency at district level by developing an innovative district heating & cooling (DHC) network controller. It aims to demonstrate that thanks to a smart DHC network controller energy savings can reach up to 30%. In that perspective, the project partners will...
List of demo sites where this technology is being implemented.

STORM Site Rottne

The Växjö Energi district heating system in Rottne, Sweden, is the second largest high temperature distribution network in Rottne, Växjö. It makes up about 10,300 m with a total volume of about 64 m³. The production is based on two bio-fuel boilers (1.5 MW and 1.2 MW), complemented with a...

STORM Site Heerlen

In Heerlen (the Netherlands), flooded mine galleries act as a renewable heat source and provide a total of 500,000 m² floor area connected to a low temperature district heating and cooling network. This system consists of two hot wells in the northern part (water with approx. 28°C) and two cold...