Piloting Underground Storage of Heat In geoThermal reservoirs

Project PUSH-IT’s ambition is to overcome the seasonal mismatch between heat demand and heat generation from sustainable sources using underground heat storage. The EU-funded project focusses on three innovative technologies for high-temperature heat storage, as well as enabling technologies, societal engagement, and governance, policies and business models.

The goal is to develop this missing link in heat networks as a safe, reliable, affordable, and economically viable solution that fits existing and future regulatory frameworks. This contributes to reducing greenhouse gas emissions and achieving a net-zero carbon economy and society in Europe by 2050.

Optimal system integration

and control will be developed to reduce costs, ensure environmental protection and achieve better integration of sustainable heat in the energy system.

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Social engagement

societal benefits, and risks and regulations will be addressed to ensure public understanding and support and speed up market upscaling of heat storage.

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Enabling technologies

and good practices will be employed to improve performance, safety and realisation of heat storage.

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Delft (NL)

Demo site for Aquifer Thermal Energy Storage (ATES).
200-300m

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Darmstadt (DE)

Demo site for Borehole Thermal Energy Storage (BTES).
750m

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United Downs (UK)

Follower site for Mine Thermal Energy Storage (MTES).
120m

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Bochum (DE)

Demo site for Mine Thermal Energy Storage (MTES).
120m

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Litoměřice (CZ)

Follower site for Borehole Thermal Energy Storage (BTES).
100-500m

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Berlin (DE)

Follower site for Aquifer Thermal Energy Storage (ATES).
400m

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The technologies

Aquifer Thermal Energy Storage (ATES) is the storage and recovery of thermal energy in aquifers, which are permeable layers that contain groundwater.

Borehole Thermal Energy Storage (BTES) is a large, underground heat exchanger. A BTES system consists of a set of tubes installed in the underground, placed vertically in a borehole.

Mine Thermal Energy Storage (MTES) uses the mine water present in abandoned mines as a carrier for transporting heat.

The pilots

PUSH-IT will demonstrate full-scale implementation of heat storage in geothermal reservoirs at three demo-sites: Delft (Netherlands), Darmstadt (Germany) and Bochum (Germany). Next to these key demo-sites, three ‘follower’ locations for future pilots are Berlin (Germany), Litomĕřice (Czechia) and United Downs (United Kingdom). At these sites, we will address specific local technical and societal challenges and engage local stakeholders. We will translate our findings into solutions that can be applied to heat storage systems across Europe.

5-10 MW
60 TJ/y
Delft (Netherlands)
Demo ATES (200-300m depth) site
storing heat from a geothermal doublet
(max 80°C) integrated into a heat network
used in the built environment.

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270 kW
20 TJ/y

Darmstadt (Germany)
Demo BTES site (750m depth) in
crystalline granodioritic reservoir
connected to a university campus,
to store excess heat (>50°C)
from a super-computer and summer
heat surplus.

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260 kW – 1MW
2 – 8 TJ/y

Bochum (Germany)
Demo MTES (120m depth) for
the reuse of summer surplus heat
from a university campus (max. 80°C),
supplementing the district heating
infrastructure.

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5-10MW
50-70 TJ/y

Berlin (Germany)
Follower ATES site (400m depth)
to be integrated in a heating network,
using surplus heat from a wood-fired
power plant (max 90°C).

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2 MW
10-20 TJ/y

Litomĕřice (Czechia)
Follower BTES site (500m depth)
where several heat sources
(deep Geothermal, cooling of
photovoltaic panels) are integrated
into a field of deep boreholes and
will be integrated into the existing
heat network.

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~600kW
~3TJ/y

United Downs (United Kingdom)
Follower MTES site (500m depth)
to be investigated within an abandoned mine
complex. The project is adjacent to a drilled
fractured geothermal reservoir with fluid
temperatures
of ~180°C.

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The topics

Social engagement, societal benefits, and risk and regulations

will be addressed to ensure public understanding and support and speed up market upscaling of heat storage.

Optimal system integration & control 

will be developed to reduce costs, ensure environmental protection and achieve better integration of sustainable heat in the energy system.

Enabling technologies

and good practices will be employed to improve performance, safety and realisation of heat storage.

News

Research

A closer look at Co-Simulation

One of the Enabling Technologies that is being developed by the Push-It project is Co-Simulation. This simulation models the complete UTES system. That is all well and good, but how does it work? What are the challenges the team is facing? What is the current status of development? We asked Max Ohagen, who is a developer on this part of the project.

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Research

New research on performance of HT-ATES

In a new contribution to the advancement of sustainable thermal energy technologies, a newly published scientific paper outlines key insights into the performance of High-Temperature Aquifer Thermal Energy Storage (HT-ATES) systems. The study reveals how physical parameters of the subsurface can be used to estimate system efficiency, and it offers a valuable open-access dataset to support further research and development.

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Engagement

Introducing INTERSTORES

Across the continent, multiple research and demonstration projects are working in parallel to develop and deploy TES solutions tailored for local energy systems. Today, we’re highlighting one of those exciting initiatives: the INTERSTORES Project.

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Feel free to contact us

PUSH-IT is a project funded by the European Union’s Horizon Europe research and innovation programme under grant agreement No 101096566.
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union. Neither the European Union nor the granting authority can be held responsible for them.

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