Demonstration of storage in residential district
Lecale, Northern Ireland
This demonstration will illustrate the benefits and opportunities of providing electrical storage through the media of compressed air and stored heat to areas of relatively weak existing electrical infrastructure. The location is in Lecale, a semi-rural area in the south-east of Northern Ireland.
The unit will help to demonstrate the ability to store and re-generate electricity with standardised technology components and will validate models for operating the unit within a residential setting both to maximise the penetration of local sources of renewable energy and to minimise transmission and distribution network reinforcement requirements. It is also intended that the unit will demonstrate applications for compressed air storage within relevant markets including system support services, capacity provision and load-on-demand services.
The demonstration unit will take electricity from the grid to drive a compressor for storing compressed air in air storage cylinders. The heat released in this process will be recovered and stored in molten salt tanks. When electricity is required for export, the compressed air is directed through an expander with heat injection from the heat store to drive a generator. There will be a site control room to monitor and control the processes and to facilitate close monitoring of the operation of the system.
The area occupied by the demonstration unit will be reasonably compact, totalling about 20m by 20m excluding space for access and parking.
Responsable partner: B9 Energy Storage Ltd.b
"Driving innovation in distributed compressed air energy storage with integrated heat recuperation“
David Surplus, B9 Energy Storage Ltd.
December 9, 2015
January 20, 2017
February 3, 2017
NIE Substation Works
February 17, 2017
Control Room construction
March 3, 2017
Air Storage installation and testing
When generation capacity on the local network is greater than is required for local demand, the unit commences to compress air, storing the compressed air in tanks and the resulting heat in molten salt. When the electricity is needed, the compressed air is expanded and the stored heat is injected to maintain the overall efficiency of the process.
The compressed air unit comprises: air, hot water and molten salt storage tanks; compressors and expanders for converting the electricity into the storage media and reversing the process to generate electricity; heat exchangers and control facilities.
SeaGen, the world’s first commercial-scale tidal stream energy system, is one of the local technologies whose output supplies the 33kV substation that the energy storage demonstration unit will be serving.
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