Engine Demand, BOG Contribution, Cryogenic Pump Flow, Pressure Reserve, Vaporizer Duty, N+1 Capacity & FGSS Economics

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

Turn the ship's actual gas demand into the FGSS quantities that control equipment selection. Calculate design gas flow, usable BOG contribution, liquid LNG pump throughput, pressure reserve, cryogenic pump electrical load and vaporizer / gas-heater duty. Advanced mode adds the full consumer register, N+1 equipment capacity, tank endurance, bunkering time, BOG compression, ship electrical reserve and project economics.

Data type
Currency
Currency selection changes display only. No exchange-rate conversion is performed.
↑
Need much more depth? Click Advanced above. Add each gas consumer, BOG balance, tank and bunkering data, N+1 pumps and vaporizers, actual pump efficiencies, heat-source derating, electrical spare and FGSS investment economics.

Fast FGSS Capacity Screen

Use the engine / equipment maker's maximum gas demand and pressure requirement whenever available. Simple mode assumes entered usable BOG is already conditioned and available to consumers at the required pressure and temperature.

kg/h total gas demand before FGSS design margin.
kg/h already available to the consumer gas system.
% above coincident peak demand.
kg/m³. Project / composition input.
bar(a), simplified pump-inlet basis.
bar(a). OEM requirement.
bar(a), before downstream pressure losses.
m³/h.
kJ/kg of pumped LNG. Vendor thermodynamic value preferred.

FGSS Design Basis

%.
h/year.
kg/m³.
°C. Individual consumer rows may override.

Gas Consumer Register

For engines, leave direct kg/h at 0 to calculate from quantity × rated kW × load × entered specific gas consumption. For boilers or OEM demand data, enter direct peak / average kg/h. Labels are not submitted to Ship Universe Tool Data.

ConsumerTypeQtyRated kWPeak load %Avg load %h/yrSGC g/kWhDirect peak kg/hDirect avg kg/hSim %Pressure bar(a)Gas temp °C

Tank, BOG & Bunkering

m³.
%.
m³/h.
kg/h at peak.
%.
kWh/kg of BOG used. Enter 0 if no compressor power is required.
bar(a), pump hydraulic basis.

Cryogenic Pump & Delivery Pressure

bar(a).
bar. Project / OEM pressure-drop allowance.
m³/h.
%.
%.
kW.
kW.
kW.

Vaporizer & Gas Heating

kJ/kg.
kJ/kg.
kWth.
%.
%.

FGSS Investment & Fuel-Spread Economics

%.
Selected currency / year.
Selected currency / kWh.
Selected currency / t LNG. May be negative.
Selected currency / 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, vaporizer heat-exchanger design, detailed 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: The IMO IGF Code provides mandatory criteria for ships using gas or other low-flashpoint fuels and is intended to deliver a safety, reliability and dependability level comparable with conventional oil-fuelled machinery. A marine LNG FGSS may include the storage tank, bunkering equipment, pressure-build-up equipment or cryogenic pumps, vaporizers, gas heaters, compressors, gas valve units, piping, controls and safety systems. Wärtsilä LNGPac describes pump, pressure-build-up and combined process arrangements and notes that the process equipment must deliver the correct gas temperature and pressure to engines and other consumers. MAN notes that an FGSS must match instantaneous engine fuel demand and that different engine technologies can require very different delivery pressures, reinforcing the need to use OEM pressure and demand data rather than generic assumptions. IMO IGF Code · Wärtsilä LNGPac · MAN LNG dual-fuel conversion
Generated by ShipUniverse.com
By the ShipUniverse Editorial Team — About Us | Contact