Onboard carbon capture · capture rate · energy penalty · CO2 storage · offloading · ROI
Onboard Carbon Capture ROI & Storage Capacity Calculator
Screen onboard carbon capture economics from exhaust generation through capture, energy penalty, liquefied CO2 storage, offloading and permanent-storage logistics. Simple mode gives a fast vessel-level case. Advanced mode separates exhaust sources, capture availability, heat and electrical penalties, tank sizing, terminal costs, lifecycle cash flow and carbon-value sensitivity.
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Need source-by-source capture, liquefaction power, tank sizing or terminal logistics?Click Advanced above. Simple uses disclosed screening assumptions for fuel CO2 factor, liquid CO2 density, operating days, project life and discount rate.CarbonCaptured & net avoided
StorageTank endurance & offloads
ReturnPayback, NPV & break-even
Fuel & Capture Baseline
Start with annual vessel fuel and the share of emissions that the OCCS can actually treat.
MT/year, main + auxiliary fuel included in the screening case.
Percent removed from the exhaust stream while OCCS is operating.
Share of annual ship emissions routed through the capture system.
Additional fuel-equivalent demand for capture, compression and liquefaction.
Carbon Value & CO2 Logistics
USD/MT.
USD/tCO2 of qualifying avoided emissions.
USD/tCO2 captured, including shore logistics if appropriate.
m3. Simple applies a 90% usable fill factor and 1.10 t/m3 density.
Project Economics
USD, installed vessel project.
USD/year, excluding extra bunker and variable CO2 handling.
Simple assumptions: fuel CO2 factor 3.114 tCO2/MT fuel, liquid CO2 density 1.10 t/m3, 90% usable tank fill, 300 OCCS operating days/year, 10-year real-term screen and 8% discount rate. Extra fuel emissions are conservatively treated as uncaptured. Use Advanced to replace these assumptions.
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Advanced separates physical capture from carbon-accounting value.Captured tonnes, energy-penalty emissions and tank demand are calculated physically. Only the operator-entered eligible share receives carbon value.Project & Economic Basis
years
%/year
%/year
USD/MT
%/year
USD/tCO2
%/year
% of net avoided CO2 that qualifies for the entered carbon value.
USD at end of analysis.
Exhaust Source Register
Model each fuel-consuming source that may or may not be connected to OCCS. Capture is reduced by both treated share and technical availability.
| Use | Source | Annual fuel MT | Fuel EF tCO2/MT | Treated % | Capture % | Availability % |
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Capture Energy & Operating Cost
% of treated fuel while OCCS is available. Set lower if waste heat supplies reboiler duty.
kWh per tCO2 captured for fans, pumps, compression/liquefaction.
kg fuel/MWh equivalent. Enter 185 for 0.185 kg/kWh.
tCO2/MT fuel.
USD/tCO2 captured.
USD/year.
%/year
CO2 Storage & Offtake
m3
t/m3 planning density.
% of gross volume available for stored product.
days/year with meaningful capture operation.
operating days.
t/hour during shore discharge.
USD/tCO2 captured.
USD per offload event.
Installed Project Cost
% of equipment + integration + tanks + engineering.
days
USD/day
Project Readiness Checks
Stress Cases
Stress the variables most likely to move OCCS economics. Multipliers apply to the Advanced base case.
| Case | Carbon value | Capture performance | Energy penalty | Logistics cost | CAPEX |
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