Formula & worked example
E=(mdemand−msupply)·t·Δh; V=E/usable stored energy density.
A 2 t/h shortfall for 15 minutes equals 500 kg peak steam deficit before storage-property corrections.
Plant engineering calculator · Updated Sep 17, 2026
Steam Accumulator Sizing Calculator — Peak Load Storage & Vessel Volume
Estimate steam accumulator storage for a peak-load shortfall from demand, boiler supply, event duration and usable stored-energy density. Returns required stored energy, equivalent steam mass and vessel volume.
Inputs
Live result
Peak steam deficit 500 kg
Stored energy duty 1,050 MJ
Stored energy duty 0.2916667 MWh(th)
Required vessel working volume 5.833333 m³
Required vessel working volume 1,541.004 US gal
Assumptions & limits
- Usable stored-energy density must come from validated steam/water property data for the chosen pressure swing.
- This screens storage duty; vessel mechanical design, controls and code compliance are separate.
Frequently asked questions
What does this Steam Accumulator Sizing Calculator calculate?
Estimate steam accumulator storage for a peak-load shortfall from demand, boiler supply, event duration and usable stored-energy density. Returns required stored energy, equivalent steam mass and vessel volume.
Can I use the result for final equipment selection?
Use it for screening, benchmarking and option comparison. Final selection should use measured conditions, manufacturer performance data and applicable engineering standards.
Why are assumptions shown beside the calculation?
Plant calculations change materially with pressure basis, reference conditions, efficiencies and operating profile. Explicit assumptions make the result auditable instead of hiding those choices.