Windheizung 2.0

Thermal storage technologies for excess wind power

Building simulation and model building to optimize the systems and support the future market entry


The Windheizung Demo Project aims to utilize excess electricity from wind power and store it as thermal energy for heating purposes. Three thermal storage concepts are investigated: water-based thermal storage (WBTS), thermally activated building systems (TABS), and high-temperature stone storage. The project focuses on load control strategies, utilizing weather forecasts and electricity price signals to optimize the charging process.

The WBTS involves a large water tank that supplies domestic hot water and space heating. TABS utilizes building components as thermal storage, providing heating and cooling through the thermal inertia of the components. The high-temperature stone storage uses a massive stone core with insulation layers for high-temperature heat storage. The project ensures the integration of these storage systems into high-performance buildings and considers insulation and heat dissipation factors. The overall goal is to effectively utilize excess wind power, reduce grid overloading, and store energy for space heating and domestic hot water. The project’s research findings contribute to the development of efficient and sustainable energy solutions for buildings.

Models were developed for all three thermal storage concepts. The models were successfully integrated into building simulation software and validated with lab data. The performance of the systems was assessed, indicating their potential to cover a significant portion of heating demand. However, real-world implementation may face challenges related to building specifics, system performance, and occupant behavior. Future studies could explore system combinations and alternative storage methods to optimize performance and power management.


Advantages to partner with C3RRO for Model Development

Deep scientific understanding

A deep understanding of physics leads to efficient model development.

Model integration in building simulation

Stand alone models can be integrated in a whole building simulation – showcasing the holistic effect on building performance.

Research project consulting

Expert building science know-how and experienced research project consulting ensure high-quality results.


Tools services user

Software programming

We create custom software solutions according to our clients needs


We help identify the needs for custom software solutions

Scientific background

We bring deep understanding of building science to crate state-of-the-art solutions

Active House

Radar Tool

Use of the Radar Tool