CTG developed the concept of Cased-Wellbore Compressed Air Storage (CWCAS) for renewable energy storage. CWCAS is an advanced Compressed Air Energy Storage (CAES) process; and is a high-pressure, low-volume CAES process. CWCAS geo-ESS enhances the versatility and application of this energy storage approach.
40 - 60 MWh Storage Facility (conceptual)
Energy CAPEX: < $300/kWh
Well Life Cycle: 20 - 25 years
80 MWh Battery Storage Facility
Energy CAPEX: ~$400+/kWh
Battery Life Cycle: ~ 5 - 7 years
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