Europe chases GWh energy storage

The door is opening for technologies such as CAES. Pic: ALACAES.

The door is opening for technologies such as CAES. Pic: ALACAES.

By Jason Deign

Gaelectric’s Larne project funding approval this month has focused attention on European efforts to develop large-scale storage technologies that could rival pumped hydro.

Dublin, Ireland-based Gaelectric was granted €90m in European Union backing for a compressed air energy storage (CAES) project due to be built in Larne, east Antrim, on the Northern Irish coast.

The funding came on top of €15m in previous grants, the BBC reported. The Larne CAES project, due for completion around 2022, is a European project of common interest that will generate up to 330MW of power for up to six hours.

Being developed in association with Dresser-Rand, it will store compressed air in two caverns located in salt deposits below ground. When needed, the air would be re-heated using natural gas and, on expansion, drive a turbine.

The plant’s compressors will also provide up to 250MW of demand response to mop up excess wind capacity on the Northern Irish grid, which only has limited connections to electricity networks on Ireland and Great Britain. 
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ALACAES seeks CAES partners

ALACAES is looking for partners after proving its compressed air energy storage concept last year. Pic: ALACAES.

ALACAES is looking for partners after proving its compressed air energy storage concept last year. Pic: ALACAES.

NB: In our intelligence brief, we incorrectly stated that L’Azienda Elettrica Ticinese had pulled its investment out of ALACAES and that Airlight Energy had run into technical problems. This version corrects both statements.

By Jason Deign

ALACAES, of Lugano, Switzerland, is seeking institutional partners and investors to create the world’s first high-pressure advanced adiabatic compressed air energy storage (CAES) plant.

The company is looking for between USD$4m and $6m in funding to build a demonstration plant operating at 90 to 100 bar after proving its technology with a 7-bar pilot last year.

The 2016 pilot, with a capacity of 1MWh and a power rating of 600kW, was the first adiabatic CAES plant in the world, according to ALACAES.

On its website, the US Energy Storage Association (ESA) notes: “Advanced-adiabatic compressed air energy storage (AA-CAES) is an evolution of traditional CAES, designed to deliver higher efficiencies.

“Operation is similar to traditional CAES in that energy is stored by compressing air with turbomachinery and storing in an underground cavern. The difference lies in the treatment of the heat of compression.” 
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