Compressed Air Energy Storage (CAES)

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Basic Technology CharacteristicsSMW-Info-button.png

CAES.png

How it Works: Air is compressed (charging), stored, and expanded (discharging).
Benefits:
  • Mature bulk storage
  • Low cost per kWh potential
Challenges:
  • Geographical limitations
  • Requires fuel for heating producing CO2 emissions
Technology Variations:
Applications: Bulk, long-duration services
AC RTE Efficiency: 40-55%
Cycle Life: 30 years
Technology Readiness Level (TRL): 9 - Fully Mature
Installed Capacity: ~500 MW


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