Thermal Energy Storage |

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Deployed by 1 company

Subsurface Heat Storage

Page last modified

March 27 2025

Thermal energy storage

HoCoSto develops, produces and realizes underground heat and cold storage for large consumers of energy. We provide standard configurable solutions including smart power management as well as storage-only for third-party systems. By storing energy from renewable sources underground, we make sustainable heating and cooling possible.

Flexible energy system

Using a HoCoSto storage creates flexibility in the energy system. The moment when heat is needed and used (demand) is decoupled from the moment when renewable heat is available (supply).

Pros & Limitations

Fossil Free

CO2 neutral

Reuse of the surface for playground/parking lot/ etc after storage is placed underground

No concrete used, low CO2 footprint, easy to remove end of lifetime

Only recyclable materials used

Affordable monthly fee for users, collective system allows participation for those with fewer financial means

Some space, e.g. soccer field, parking lot, schoolyard is needed to place the buffer underground. Not suitable for big city centres.

Specification

Title	Description
Theme/Discipline	Reservoir Engineering
Core Tech	Energy Storage/Battery
Industry	Energy StorageSmart City
Grid congestion	Grid congestion solution
Fossil-free and Zero CO2 emission	By using PV or green electricity as auxiliary energy. Balances the electricity grid rather than stressing it (as most fossil free solutions do)
No concrete used	Easy to remove end of lifetime. Fully recyclable, no hybrid materials used
Fast implementation	Low carbon footprint in scope 1-2-3
Patents	Patented with two European patents, two more in filing process