Onboard Carbon Capture ROI & Storage Capacity Calculator
Estimate onboard carbon capture system economics, CO2 capture,
energy penalty, fuel cost, storage capacity, offloading frequency,
lifecycle cost, break-even carbon value, payback and NPV.
Advanced mode models capture plant performance, compression and
liquefaction energy, onboard CO2 tanks and downstream handling.
Capture Economics
CAPEX, energy penalty, operating cost, downstream CO2 cost
and carbon value
Onboard Storage
Estimate tank requirement, storage endurance and annual
offloading frequency
Investment Case
Payback, NPV, IRR, lifetime ROI and levelized abatement cost
Vessel Emissions & Capture
Use annual fuel consumption and an estimated OCCS
capture rate for a fast project screen.
MT/year
tCO2/MT
%
%
days/year
%
Additional fuel used while OCCS is operating.
Carbon Value & Operating Cost
$
/MT
$
/net tCO2
User-entered economic value only. No regulatory
credit is assumed automatically.
%
$
/year
$
/tCO2
$
/tCO2
CO2 Storage & Offloading
tonnes
days
Project Investment
$
years
%
%/year
%/year
%/year
Vessel & Capture System
Advanced mode separates sea and port operation and
calculates energy penalty from electricity plus an
optional additional process-fuel penalty.
tCO2/MT
%
Sea & Port Operating Profile
MT/day
days
%
MT/day
days
%
OCCS Energy Penalty
Include capture, compression, liquefaction and associated
auxiliary loads in the specific electricity figure where applicable.
kWh/tCO2
g/kWh
%
Optional additional fuel penalty for thermal demand
or process energy not captured by the electrical input.
Liquid CO2 Storage & Offloading
m³
t/m³
Enter the design density appropriate for the
selected storage condition and system.
%
days
$
/offload
Retrofit CAPEX
$
$
$
$
$
$
%
$
days
$
/day
OCCS OPEX & CO2 Value Chain
$
/year
$
/year
$
/tCO2
$
/tCO2
$
/tCO2
$
/year
%/year
Carbon Value & Lifecycle
$
/MT
$
/net tCO2
%
$
/tCO2
%/year
%/year
years
%
$
OCCS Investment & Storage Results
Simple onboard carbon capture screen
Enter vessel data
Enter vessel fuel use, capture rate, bunker price and
project cost to calculate onboard carbon capture economics
and CO2 storage requirements.
Project NPV
N/A
Discounted lifecycle value after CAPEX, energy,
OPEX, CO2 handling and modeled carbon value
Net CO2 Avoided / Year
N/A
Gross captured CO2 less emissions from the modeled
OCCS fuel penalty
Gross CO2 Captured
N/A
Effective CO2 Reduction
N/A
Extra OCCS Fuel
N/A
Fuel Penalty Cost
N/A
Installed Project Cost
N/A
Year 1 Net Benefit
N/A
Simple Payback
N/A
Internal Rate of Return
N/A
Lifetime ROI
N/A
Break-Even Carbon Value
N/A
Levelized Abatement Cost
N/A
Storage Endurance
N/A
Required Storage
N/A
Storage Capacity Margin
N/A
Estimated CO2 Offloads
N/A
Annual OCCS Operating Cost
N/A
Year 1 OCCS Economics
Carbon Capture & Storage Summary
Onboard CO2 Storage Analysis
Based on modeled capture rate
Metric
Result
Lifecycle OCCS Cash Flow
Fuel, value and OPEX escalation included
Year
CO2 Captured
Net CO2 Avoided
Fuel Penalty
OCCS + CO2 Cost
Carbon Value
Offtake Value
Net Cash
Discounted
Cumulative PV
OCCS ROI Sensitivity
Capture performance vs carbon value
Capture Performance \ Carbon Value
-20%
Base
+20%
OCCS estimate ready:
project guidance will appear after calculation.
Model approach:
gross captured CO2 is calculated from baseline fuel
emissions, OCCS utilization and capture rate. Emissions
created by the modeled OCCS energy penalty are deducted
conservatively from captured CO2 to estimate net CO2 avoided.
Financial value is applied only to net avoided CO2.
Advanced mode separately calculates electrical fuel demand,
additional process fuel, CO2 handling, transport and storage
cost, offloading cost, onboard storage endurance and required
tank volume.
Planning estimate only.
Actual onboard carbon capture performance depends on capture
technology, exhaust composition, engine load, heat availability,
electricity demand, compression and liquefaction requirements,
storage conditions, vessel layout, tank configuration, system
availability, CO2 purity, port infrastructure and downstream
transport, utilization or permanent storage arrangements.
Regulatory recognition, monitoring, verification and accounting
treatment may differ by jurisdiction and framework. Carbon or
compliance value is therefore user-entered and is not automatically
credited by this calculator. Additional-energy emissions are treated
conservatively as uncaptured. LNG and other fuels may require
additional GHG considerations not modeled here.
