COMPRESSED-AIR STORAGE EVIDENCE SHEET
Yenra | Updated September 7, 2026
Article: https://yenra.com/compressed-air-energy/

PURPOSE AND INSTRUCTIONS
Compare compressed-air storage proposals at the same required service. Request professional design and operating evidence; this sheet is not pressure-system design or operating guidance.

DESIGN AND STATUS
Provider / project / document date:
Design: diabatic, adiabatic, near-isothermal or specified variation:
Heat source, storage and rejection:
Vessel or geological storage / site assessment / approvals:
Status: laboratory, proposed, commissioning, operating:
Evidence period / duty / independent or supplier test:

SERVICE AND BOUNDARY
Required net MW / usable MWh / duration (h):
Response / cycles per year / storage interval:
Electrical measurement boundary:
Initial and final pressure and thermal state:
Ambient conditions / output variation / reserve:

COMPLETE CYCLE LEDGER
Charging electricity including auxiliaries (MWh):
Additional fuel input (MWh, specify LHV or HHV):
External heat input (MWh thermal and temperature):
Net electricity returned at the same boundary (MWh):
Fuel-free electrical RTE = net output / full electrical input, only with no external fuel/heat and equivalent initial/final storage states.
If fuel/heat is used, keep every input visible and name any combined-input ratio precisely.

FICTIONAL CHECKS
Fuel-free: 100 MWh electricity in, 60 MWh net out = 60% electrical RTE.
60 MWh steadily at 20 MW = 3 hours.
Separate fuel-assisted case: 100 MWh electricity + 50 MWh fuel (LHV), 90 MWh net out.
90/100 = 90% omits fuel. 90/(100+50) = 60% electricity output / total stated energy input.
The latter combines input energy types; it is not fuel-free electrical RTE or an exergy analysis. Neither case predicts real equipment performance.

COMMERCIAL REVIEW
Installed scope / grid connection / fuel/energy cost / staff / maintenance:
Replacement obligations / acceptance tests / guarantees / exclusions:
Evidence gaps / alternative serving the same duty / decision:

REFERENCE CONTEXT
The linked article explains the comparisons and limits. Check exact project or equipment documents before using a specification.
DOE 2023 compressed-air technology assessment
https://www.energy.gov/sites/default/files/2023-07/Technology%20Strategy%20Assessment%20-%20Compressed%20Air%20Energy%20Storage_0.pdf
Sandia’s energy-storage performance-testing chapter
https://www.sandia.gov/app/uploads/sites/163/2021/09/ESHB_Ch16_Testing_Rosewater.pdf
Sandia’s storage procurement chapter
https://www.sandia.gov/app/uploads/sites/163/2021/09/ESHB_Ch20_Procurement_Olinsky.pdf