Cryogenic Tank Boil-Off Loss Analyzer

Translate cryogenic boil-off rates into tangible mass loss, replacement cost, and optional CO2e emissions so maintenance teams can prioritize insulation upgrades and reliquefaction projects.

Usable liquid volume stored in the cryogenic tank.
Average percentage of inventory that vaporizes each day.
Mass per liter of the stored cryogenic product.
Replacement cost per kilogram of product lost.
Default 0. Supply a greenhouse-gas factor to translate vented mass into CO2e.

Verify boil-off coefficients and commodity pricing with your supplier before using these estimates for financial reporting.

Examples

  • 25,000 L tank, 0.35% boil-off, 0.80 kg/L density, $0.65/kg price ⇒ Daily cost $45.50 and 25.55 tonnes vented per year.
  • 18,000 L tank, 0.25% boil-off, 0.07 kg/L density, $6.80/kg price, 0.90 kg CO2e/kg ⇒ Daily cost $21.42 and 1.03 t CO2e per year.

FAQ

How do I adjust for partial tank inventory?

Multiply your tank capacity by the average fill level before entering it, or rerun the analyzer at different fill percentages to see the sensitivity.

Can reliquefaction systems change the boil-off rate?

Yes. Enter the reduced boil-off percentage achieved after reliquefaction upgrades to quantify the cost savings before and after the project.

What emission factor should I use?

Consult NFPA, CGA, or supplier data for the appropriate kg CO2e per kg—liquid hydrogen, for example, can be tied to upstream electricity intensity if vented.

Does the calculator capture pressure relief losses?

Pressure relief and transfer losses are not modeled separately; add them to the boil-off percentage if they materially impact your storage site.

Additional Information

  • Daily boil-off percentage is treated as a constant fraction of the full tank volume for quick planning estimates.
  • Density input allows the tool to work across liquid nitrogen, oxygen, hydrogen, or LNG—adjust to match product specifications.
  • Annual cost multiplies the daily loss by 365 days; change the boil-off rate to model seasonal swings.
  • Emission factors let ESG teams translate vented product into reportable greenhouse-gas impacts when required.

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