RCAIDE.Library.Attributes.Propellants.Liquid_Natural_Gas

Liquid_Natural_Gas#

class Liquid_Natural_Gas(*args, **kwarg)[source]#

Bases: Propellant

A class representing Liquid Natural Gas (LNG) fuel properties and composition for propulsion applications.

tag#

Identifier for the propellant (‘Liquid_Natural_Gas’)

Type:

str

reactant#

Oxidizer used for combustion (‘O2’)

Type:

str

density#

Fuel density in kg/m³ (414.2)

Type:

float

specific_energy#

Specific energy content in J/kg (53.6e6)

Type:

float

energy_density#

Energy density in J/m³ (22200.0e6)

Type:

float

use_high_fidelity_kinetics_model#

Flag for using detailed chemical kinetics (False)

Type:

bool

fuel_surrogate_chemical_properties#
Simplified chemical composition for surrogate model
  • CH4float

    Methane fraction (0.85)

  • C2H6float

    Ethane fraction (0.1)

  • C3H8float

    Propane fraction (0.05)

Type:

dict

fuel_chemical_properties#
Detailed chemical composition
  • CH4float

    Methane fraction (0.83)

  • C2H6float

    Ethane fraction (0.1)

  • C3H8float

    Propane fraction (0.05)

  • C4H10float

    Butane fraction (0.02)

Type:

dict

global_warming_potential_100#
100-year global warming potentials
  • CO2float

    Carbon dioxide (1)

  • H2Ofloat

    Water vapor (0.06)

  • SO2float

    Sulfur dioxide (-226)

  • NOxfloat

    Nitrogen oxides (52)

  • Sootfloat

    Particulate matter (1166)

  • Contrailsfloat

    Contrail formation (11)

Type:

Data

Notes

LNG is a cryogenic fuel consisting primarily of methane with small amounts of heavier hydrocarbons. It requires storage at approximately -162°C but offers reduced carbon emissions compared to conventional fuels.

Definitions

‘Surrogate Model’

Simplified three-component representation for faster calculations

‘Global Warming Potential’

Relative measure of heat trapped in atmosphere compared to CO2

‘Energy Density’

Energy content per unit volume, affected by cryogenic storage conditions

Major Assumptions

  • Properties are for saturated liquid at atmospheric pressure

  • Composition represents typical LNG mixture