Exploiting the potential for thermal energy storage


The EIC-funded 4TunaTES project was established to address the urgent need for energy and heat storage owing to the intermittency of renewable resources.

For Tunable Thermochemical Energy Storage

Aim of the project

The initiative will deliver groundbreaking, flexible thermochemical energy storage (TCES) technology that cuts development costs by 90 % and can be easily adapted to different applications.

Researchers seek to produce a TCES prototype for domestic use, developing new TCES materials with tuneable phase diagrams, heat-exchanging components with high manufacturing flexibility and innovative systems with electricity-adapted thermodynamic cycles.

4TunaTES brings together computational material scientists, physical chemists, mechanical engineers and a heat battery developer to unlock the potential of thermal energy storage

Tasks at DLR

DLR is contributing to the 4TunaTES project by the development of novel, flexible chemical heat pump and heat storage concepts. Furthermore, the prototype storage developed within the project will be set up and tested at DLR.

4TunaTES at a glance




1.2.2024 - 31.1.2028


The European Innovation Council (EIC)

Total cost: € 2 782 213,75


Eindhoven University of Technology

Consiglio nazionale delle ricerche

Vrije Universiteit Brussel

Cellcius BV Heat Battery Technology

This project has received funding from the European Union’s Horizon Europe EIC Pathfinder programme under grant agreement No 101130021 (4TunaTES)


Prof. Dr.-Ing. Annelies Vandersickel

Head of Department Thermal Process Technology
Institute of Engineering Thermodynamics
Thermal Process Technology
Pfaffenwaldring 38-40, 70569 Stuttgart