The project successfully achieved its main objective of developing a compactness with 0.3-1 m3 heat storage material and system energy density ≥ 10 times state-of-the-art water solutions. Each storage module (box) delivers 3 kWh with a volume of ~0.018 m³. A key innovation is the modular system design, with decoupled storage and heat input/output units. This architecture allows for scalable, customizable configurations tailored to specific end-user needs and budgets. Modular components, such as TCM containers, valve boxes, and heat exchanger elements, were standardized, simplified, and cost-optimized to ensure both flexibility and affordability. Technical improvements were made in critical areas such as sealing, valve clearance, airflow control, and nozzle design, leading to a more robust and efficient system. The reactor and component modules were integrated to further reduce system volume and enhance storage density. The system was fully validated at three demo locations, including integration with heat and electricity grids.
During the HEAT-INSYDE project, partners actively engaged in knowledge dissemination across academic and industrial platforms. Throughout the project, eight peer-reviewed publications, four patents, 14 conference contributions, 3 innovation workshops, and 2 Q&A sessions demonstrate the academic partners' continued involvement in the scientific community. Both academic and industrial partners have worked to maximize the visibility and impact of HEAT-INSYDE’s results. Dissemination efforts included presentations at key conferences, publication of scientific papers, and broad communication via social media, newsletters, and the project website. Notably, the Media page became one of the most-visited sections of the website, confirming the effectiveness of this outreach strategy in engaging stakeholders. These combined efforts have positioned HEAT-INSYDE to make a lasting contribution to both science and industry.
The next phase will focus on the following strategic pillars:
1. Revisiting use case definition
2. Reconsidering market entry focus
3. Planning further technology development
4. Defining the valorisation vehicle
5. Shaping a financial and investor strategy
6. Develop a comprehensive financing strategy that balances dilutive and non-dilutive funding and identifies the most suitable investment instruments to support the next development phase.
