ENERGY STORAGE

Hydraulic Storage (>100MW - 200MWhrs)

Utilising our expertise in blind bored shafts, a large piston and cylinder is constructed underground. From its charged position, potential energy of the piston at the top of the shaft forces water through a turbine which is connected to a generator supporting the electrical network. The system can be tailored for specific needs and adapted for fast discharge over varying durations.

Pumped Hydro (>100MW/>1GWhrs)

Our largest energy storage system, providing hundreds of megawatts over many hours to days. This system uses the potential energy stored in a large reservoir at an elevated position. When energy is required water is released from the elevated storage via a turbine that produces electrical energy. When energy is plentiful, the process is reversed and water is returned to the upper storage ready for the next cycle.

Gravity Storage (>100MW - 100MWhrs)

Designed to provide short term support and can deliver maximum power in a short time. A heavy mass is suspended in an enclosed shaft storing potential energy. When energy is needed to firm and stabilise electrical networks, the mass is allowed to drop converting the potential energy of the suspended mass via a generator and delivering synchronised electrical energy to a network.

Abergeldie and ITP Thermal established Ardent Underground to provide high purity, economical and safe underground hydrogen storage, the missing link to a green hydrogen future. Our blind bore drilling method offers a replicable, small footprint solution which can store up to 500 tonnes per shaft.

Safe Storage

Hydrogen is stored in an environment absent of oxygen and any potential ignition source and risk of impact to the tank

Affordable

The surrounding rock takes on the duty of containing the hydrogen pressure – no need for costly pressure containment materials

Replicable

The shaft storage construction process can be reproduced in different locations with minimal design adjustment

Pure Hydrogen Storage

Storing compressed hydrogen deep underground, without affecting hydrogen purity

Large Scale

Hydrogen storage sizes of up to 500 tonnes per shaft. For larger storage, multiple shafts can be built in the same location

Small Footprint

The above ground footprint is very small compared to equivalent pressure vessel storage