SciTransfer
PUSH-IT · Project

Seasonal Geothermal Heat Storage for Decarbonizing Urban Heating Systems

energyPilotedTRL 7

Imagine a giant natural battery underground that stores heat from the summer to use during the winter. Instead of letting excess heat escape, this system pumps it into deep rock layers. When the weather turns cold, the heat is pulled back up to warm homes and offices.

By the numbers
90°C
Maximum heat storage temperature
6
Number of demonstration sites
3
Number of storage technologies tested
The business problem

What needed solving

Sustainable heat generation often doesn't match when people actually need it, creating a seasonal gap. This leads to inefficiency and higher costs for urban heating.

The solution

What was built

Full-scale geothermal storage systems at 6 sites, including new water quality control tools and drilling methods.

Audience

Who needs this

District heating operatorsGeothermal drilling companiesMunicipal energy plannersIndustrial heat users
Business applications

Who can put this to work

District Heating
enterprise
Target: Municipal heating utility

If you are a municipal heating utility dealing with the seasonal gap between heat generation and winter demand — this project developed high temperature storage up to 90°C that balances supply and demand across the year.

Geotechnical Engineering
mid-size
Target: Specialist drilling firm

If you are a specialist drilling firm dealing with high-risk geothermal completions — this project developed new drilling and completion methods that reduce risks and improve performance in various geological conditions.

Urban Planning
any
Target: City energy planning office

If you are a city energy planning office dealing with public resistance to underground energy projects — this project developed business models and citizen engagement plans to make urban heating systems more acceptable.

Frequently asked

Quick answers

How does this affect the cost of energy?

The project aims to reduce the levelised cost of energy by improving performance and robustness through new monitoring and control systems. Based on available project data, specific price reductions are not yet quantified.

Is this technology tested at an industrial scale?

Yes, the project is showcasing full-scale application across 6 different sites using 3 different technologies to ensure relevance across various European reservoir types.

What is the IP or licensing status?

Based on available project data, specific licensing terms are not mentioned, but the project involves 7 industry partners and 4 SMEs developing enabling technologies.

What regulations or policies are being addressed?

The project investigates governance policies and legal conditions to create balanced systems for sharing the benefits and burdens of heat storage.

What is the implementation timeline?

The project runs from 2023-01-01 to 2026-12-31, with current activities including core material collection and installations at several sites.

Consortium

Who built it

The consortium is well-balanced for commercialization, featuring 22 partners with a 32% industry ratio (7 companies, including 4 SMEs). The mix of 8 universities and 7 research centers ensures technical depth, while the inclusion of heat suppliers and well drillers indicates a strong focus on practical, market-ready deployment.

How to reach the team

Contact Technische Universiteit Delft

Next steps

Talk to the team behind this work.

Contact us to connect with the PUSH-IT consortium for geothermal storage licensing.