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Study IDs two compressed air energy storage methods, sites for the Northwest

Green Car Congress

When power is abundant, it’s drawn from the electric grid and used to power a large air compressor, which pushes pressurized air into an underground geologic storage structure. The PNNL-BPA study examined a different approach: using natural, porous rock reservoirs that are deep underground to store renewable energy.

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Siemens installing Sitras supercap-based stationary energy storage unit for TriMet light right substation

Green Car Congress

Siemens is currently installing the first Sitras SES (stationary energy storage) Energy Storage Unit with supercapacitor technology in the US on the new TriMet Portland-Milwaukie Light Rail Transit Line. The 27 retrofitted vehicles are being paired with non-capacitor equipped vehicles so that stored energy can be used by both vehicles.