SciTransfer
THUNDER · Project

Seasonal Heat Recovery and Storage for Data Centers to Power District Heating

energyPilotedTRL 6

Imagine a giant battery, but instead of storing electricity, it stores heat using special chemicals. Data centers produce a lot of warmth that usually goes to waste, especially in summer when nobody needs it. This system captures that warmth and saves it for winter, acting like a thermal warehouse for cities.

By the numbers
98.5 TWh/year
Projected EU data center electricity demand by 2030
50 TWh/year
Estimated waste heat generated by EU data centers
2.5%
European building stock heating needs that could be met by DC waste heat
10
Additional sites for pre-feasibility studies across Europe
The business problem

What needed solving

Data centers produce massive amounts of low-temperature waste heat that cannot be used immediately because the demand for heating occurs in winter, while heat is produced year-round. Current infrastructure lacks the ability to store this heat seasonally or transport it efficiently to city networks.

The solution

What was built

A seasonal thermal storage system using thermochemical materials integrated with high-temperature heat pumps, including a 'Heat on Wheels' mobile storage solution.

Audience

Who needs this

Data center facility managersMunicipal district heating operatorsIndustrial heat pump manufacturersUrban energy planners
Business applications

Who can put this to work

Digital Infrastructure
enterprise
Target: Data Center Operator

If you are a data center operator dealing with high cooling costs and new EU energy regulations — this project developed a thermochemical storage system that captures waste heat. It allows you to store energy produced in summer for winter use, helping you meet mandatory heat recovery thresholds.

Urban Utilities
enterprise
Target: District Heating Network (DHN) Operator

If you are a utility company dealing with a lack of sustainable heat sources for city buildings — this project developed a way to integrate data center waste heat via high-temperature heat pumps. This provides a steady, low-carbon heat supply for the building stock.

HVAC Manufacturing
mid-size
Target: Heat Pump Manufacturer

If you are a manufacturer dealing with the need for specialized industrial heating equipment — this project developed a system integrating heat pumps with thermochemical materials. This creates a new market for high-temperature upgrades of low-grade waste heat.

Frequently asked

Quick answers

What is the estimated cost or price of the system?

Based on available project data, specific pricing is not provided, but the project aims to develop 'cost-effective' and 'cost attractive' seasonal storage solutions.

Can this be deployed at an industrial scale?

Yes, the project includes a real-world demo site in Bulgaria and pre-feasibility studies for 10 additional sites across Europe to assess scalability.

How is the intellectual property or licensing handled?

Based on available project data, specific licensing terms are not mentioned, but the project involves 14 partners including 9 industry players who will co-develop the solutions.

Which regulations drive the need for this technology?

The Energy Efficiency Directive (EED), Renewable Energy Directive (RED), and the EU Taxonomy Regulation are making heat recovery mandatory above certain thresholds.

How does the system integrate with existing city infrastructure?

It uses high-temperature heat pumps to upgrade low-grade heat and offers both fixed and mobile ('Heat on Wheels') storage to overcome direct connection hurdles to district heating networks.

Consortium

Who built it

The consortium is heavily industry-driven, with 9 industrial partners (64% of the total) and 5 SMEs, indicating a strong focus on commercial viability rather than pure research. With 14 partners across 7 countries, the project has a broad European footprint, combining the technical expertise of 2 universities and 2 research centers with the practical deployment capabilities of energy and digital infrastructure companies.

How to reach the team

Contact RINA CONSULTING SPA in Italy for partnership or licensing inquiries.

Next steps

Talk to the team behind this work.

Contact us to find a partner for the 10 pre-feasibility site assessments.