Hydrostor Inc. launches new CAES solution for multi-hundred MW storage applications

Written By: Stratton Report
April 12, 2017

On April 12, Hydrostor Inc., a CAES solution provider, announced the introduction of a long-duration bulk energy storage system that firm claims can compete head-to-head with new natural gas plants.

Hydrostor claims that its CAES solution utilities and electricity system operators to address the issues of reserve capacity, peak shaving, transmission congestion and renewables integration, enabling the transition away from fossil-fuel generation at what the firm terms half the cost of competing battery technologies.

Curtis VanWalleghem, President & CEO of Hydrostor observed:

Hydrostor Terra is an industry-changing breakthrough in cost-competitive bulk energy storage. We are engaged with several utilities around the world to deploy systems rated at hundreds of megawatts, delivering gigawatt-hours of storage at durations ranging from four hours up to multiple days. Battery technologies can’t compete with new natural gas plants, but Terra does. The value proposition for utilities is compelling, and for us that’s translating into projects.

Hydrostor emphasizes that traditional CAES systems require suitable underground geological formations for siting, and rely on natural gas to generate heat that is needed during operation, its system can be deployed at any site within proximity to a body of water, including inner-city and urban areas, and because of its advanced adiabatic design, can efficiently recycle the heat it generates during one process for use in another, making it truly emission-free.

According to the firm, the system works by converting off-peak electricity to compressed air, which is stored in a proprietary isobaric purpose-built underground cavern. During the “charge” cycle, heat generated from the compressors is stored in a patented adiabatic thermal management system and is later used to increase the air temperature prior to expansion, boosting overall round-trip efficiency. At “discharge”, compressed air is converted back to electricity, on demand, at peak times.

Travis Starns, Business Development Manager – Energy Storage, AECOM remarked: “AECOM is uniquely positioned to evaluate storage technologies for the utility sector, given the company’s expertise and extensive experience in developing and integrating new technologies within the power industry. Following our due diligence, we are excited to work together with Hydrostor in offering a complete turnkey solution within the growing energy storage market.”