Green Ammonia Bunkering Energy Intensity Calculator

Combine pumping and conditioning loads to quantify the electrical energy per tonne of green ammonia bunkered and its emissions footprint.

Total tonnes of ammonia transferred during the bunkering event.
Electrical energy required for cargo pumps and hose handling per tonne.
Energy for boil-off management, reliquefaction, or chilling; defaults to 8 kWh/t when blank.
Marginal grid intensity used to power bunkering; defaults to 0.35 kgCO2e/kWh when blank.

Operational estimator only. Confirm pump curves, insulation performance, and utility carbon factors with port engineering data before budgeting.

Examples

  • 1,500 t delivered, 9.5 kWh/t pumping, 8 kWh/t conditioning, 0.35 kgCO2e/kWh ⇒ Energy intensity 17.50 kWh/t, total 26,250 kWh, emissions 9.19 tCO2e.
  • 600 t delivered, 7 kWh/t pumping, conditioning left blank (defaults 8), grid factor left blank (defaults 0.35) ⇒ Energy intensity 15.00 kWh/t, total 9,000 kWh, emissions 3.15 tCO2e.

FAQ

Does this include production emissions?

No. It isolates bunkering operations; upstream green ammonia production emissions must be added separately to evaluate well-to-wake intensity.

How should boil-off losses be treated?

If boil-off is flared instead of reliquefied, increase conditioning energy to reflect compressors and consider adding a combustion emissions term outside this calculator.

Can I model shore-power improvements?

Yes. Reduce the grid emission factor to the marginal renewable intensity expected during bunkering and re-run the calculation to quantify avoided emissions.

Additional Information

  • Result unit: energy intensity in kWh per tonne and total energy in kWh with tonnes of CO₂e.
  • Conditioning load defaults to 8 kWh/t to cover boil-off gas handling and chilldown for cryogenic ammonia.
  • Grid emission factor defaults to 0.35 kgCO₂e/kWh, approximating many coastal grids before shore-power electrification.

Related calculators