LNG Engine Demand, Cryogenic Pumping, Vaporization, BOG Utilization & FGSS Economics

LNG Fuel Gas Supply System Sizing, Pump, Vaporizer & Engine Demand Tool

Turn the ship's actual gas consumers into an FGSS design envelope. Calculate peak and annual LNG demand, pressure and temperature requirements, BOG contribution, cryogenic pump flow and electrical load, vaporizer and gas-heater duty, N+1 equipment capacity, tank endurance, bunkering time, parasitic energy and the fuel-spread required to recover the FGSS investment.

Currency
Currency selector changes display only. No exchange-rate conversion is performed.

FGSS Design Basis

The tool uses entered engine / consumer gas demand rather than embedding an OEM fuel-consumption claim. Use engine-maker maximum gas consumption where available. Specific gas consumption is provided only as a fallback calculation path.

%
h/year
kg/m³
Project input. Actual LNG density varies with composition and condition.
°C

Main Engine Gas Demand

kW
%
%
g/kWh
h/year
bar
%

Generator Engine Gas Demand

kW
%
%
g/kWh
h/year
bar
%

Boiler / GCU / Other Direct Gas Consumers

kg/h
kg/h
h/year
%
bar

Gas Consumer Register

For engines, leave direct kg/h fields at 0 to calculate from rated kW × load × entered specific gas consumption. For boilers, GCUs or OEM data, enter direct peak / average kg/h and the tool will use those values instead.

Consumer Type Qty Rated kW Peak load % Avg load % h/yr SGC g/kWh Direct peak kg/h Direct avg kg/h Sim % Pressure bar Gas temp °C

Tank, BOG & Bunkering

m³
%
days
m³/h
kg/h
%
kWh/kg
Used only for BOG assigned to consumers. Enter 0 if no compressor power is required in the selected arrangement.
bar

Cryogenic Pump & Delivery Pressure

bar
bar
m³/h
%
%
kW
kW
kW

Vaporizer & Gas Heating

kJ/kg
kJ/kg
Use project / vendor thermodynamic data for the actual LNG composition, inlet condition and required gas temperature.
kWth
%
%

FGSS Investment & Fuel-Spread Economics

$
$
$
$
$
$
$
%
$
$ / year
$ / kWh
$ / t LNG
Enter the fuel-price advantage after correcting for the actual energy / engine-consumption basis used in your commercial comparison.
$ / year
years
years
%

Engineering Readiness

FGSS screening only: This tool is not an OEM fuel-gas specification, thermodynamic process simulation, cryogenic pump selection, NPSH calculation, piping pressure-drop study, heat-exchanger design, BOG balance, hazardous-area assessment, IGF compliance review, class-approved redundancy study or gas-safety analysis. Final pressure, temperature, flow, pump, compressor, vaporizer, heater, control and safety requirements must come from the engine makers, FGSS supplier, tank designer and applicable approval basis.
Design context: A marine LNG fuel-gas supply system can include LNG storage, bunkering equipment, pumps or pressure-build-up equipment, vaporizers, gas heaters, compressors, gas valve units, piping, control / monitoring and safety systems. The actual configuration depends on consumer pressure and temperature requirements, tank arrangement, BOG strategy, redundancy philosophy and vessel operating profile. Verify the current IMO IGF Code, class rules, flag requirements and OEM specifications for the actual project.
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