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Highview Power Storage announce development of liquid air energy storage system

Published by
Energy Global,

Highview Power Storage, Inc. and Encore Renewable Energy, have jointly announced plans to develop a long duration, liquid air energy storage system. This facility will be a minimum of 50 MW, provide in excess of eight hours of storage (400 MWh) and will be located in northern Vermont, US.

The project is the first of many utility-scale, liquid air energy storage projects that Highview Power plans to develop across the US to help scale up renewable energy deployment. The Vermont facility will contribute to resolving the longstanding energy transmission challenges surrounding the state’s Sheffield-Highgate Export Interface (SHEI) and enable the efficient transport of excess power from renewable energy sources, such as solar and wind power to help integrate them on the power grid.

In addition to supplying clean, reliable, and cost-efficient energy storage, the facility will provide valuable services to the area’s transmission system to help integrate renewable energy, stabilise the regional electrical grid, and ensure future energy security during storms and other disruptions. This includes the ability to store energy for weeks at the lowest levelised cost of long duration storage in the industry. Other services the facility can deliver include market arbitrage, frequency management, reserve, and grid constraint management services. Highview Power and Encore are in discussions with potential utility and transmission grid operator customers regarding the capabilities and services the facility can provide.

With Highview Power’s liquid air energy storage solution, excess or off-peak electricity is used to clean and compress air which is then stored in liquid form in insulated tanks at temperatures approaching -196°C. When electricity is in high demand and more valuable, the pressurised gas is allowed to warm, turning a turbine as it expands and generates energy that can be used at peak times.

Highview Power’s proprietary liquid air energy storage system, called CRYOBattery™, relies on low-risk, proven technology, generates zero emissions, has zero water impact and can be delivered at approximately half of the current cost of traditional lithium-ion batteries. At utility-scale, Highview Power’s long duration energy storage systems paired with renewables are equivalent in performance to fossil fuel powered thermal and nuclear baseload power.

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