Source code for RCAIDE.Library.Attributes.Propellants.Butanol
# RCAIDE/Library/Attributes/Propellants/Butaanol.py
#
# Created: Mar 2024, M. Clarke
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# Imports
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from .Propellant import Propellant
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# Propanol Propellant Class
# ----------------------------------------------------------------------------------------------------------------------
[docs]
class Butanol(Propellant):
"""
A class representing butanol (C4H9OH) fuel properties for propulsion applications.
Attributes
----------
tag : str
Identifier for the propellant ('Butanol')
reactant : str
Oxidizer used for combustion ('O2')
density : float
Fuel density in kg/m³ (809.56)
specific_energy : float
Specific energy content in J/kg (3.61e7)
energy_density : float
Energy density in J/m³ (2.92e10)
lower_heating_value : float
Lower heating value in J/kg (3.44e7)
use_high_fidelity_kinetics_model : bool
Flag for using detailed chemical kinetics (False)
fuel_surrogate_chemical_properties : dict
Simplified chemical composition for surrogate model {'N1C4H9OH': 1.0}
fuel_chemical_properties : dict
Detailed chemical composition for high-fidelity model
air_chemical_properties : dict
Air composition for combustion calculations
surrogate_species_list : list
Species considered in surrogate model ['CO', 'CO2', 'H2O']
species_list : list
Species considered in detailed model ['CO', 'CO2', 'H2O', 'NO', 'NO2', 'CSOLID']
global_warming_potential_100 : Data
100-year global warming potential for emissions
- CO2 : float
GWP for carbon dioxide (1)
- H2O : float
GWP for water vapor (0.06)
- SO2 : float
GWP for sulfur dioxide (-226)
- NOx : float
GWP for nitrogen oxides (52)
- Soot : float
GWP for particulate matter (1166)
- Contrails : float
GWP for contrail formation (11)
Notes
-----
This class implements properties for butanol fuel, including options forboth simplified and
detailed chemical kinetics. Properties are specified at standard conditions
(15°C, 1 atm).
**Definitions**
'Lower Heating Value'
Heat of combustion excluding latent heat of water vapor
'Global Warming Potential'
Relative measure of heat trapped in atmosphere compared to CO2
**Major Assumptions**
* Properties are for standard temperature and pressure conditions (20C, 1atm)
References
----------
[1] IEA. (n.d.). Properties. AMF. https://www.iea-amf.org/content/fuel_information/butanol/properties#:~:text=Isobutanol%20or%20n%2Dbutanol%20are,from%20gasoline%20in%20normal%20conditions.&text=Viscosities%20of%20butanol%20isomers%20are,to%20viscosities%20of%20diesel%20fuel.
"""
def __defaults__(self):
"""This sets the default values.
Assumptions:
Density at 20C 1 atm
Source:
"""
self.tag = 'Butanol'
self.reactant = 'O2'
self.density = 809.56 # kg/m^3 (15 C, 1 atm)
self.specific_energy = 3.61e7 # J/kg
self.energy_density = 2.92e10 # J/m^3
self.lower_heating_value = 3.44e7 # J/kg
self.stoichiometric_fuel_air_ratio = 0 # [-] Stoichiometric Fuel to Air ratio
self.heat_of_vaporization = 0 # [J/kg] Heat of vaporization at standard conditions
self.temperature = 0 # [K] Temperature of fuel
self.pressure = 0 # [Pa] Pressure of fuel
self.fuel_surrogate_S1 = {} # [-] Mole fractions of fuel surrogate species
self.kinetic_mechanism = '' # [-] Kinetic mechanism for fuel surrogate species
self.oxidizer = ''
self.global_warming_potential_100.CO2 = 1 # CO2e/kg
self.global_warming_potential_100.H2O = 0.06 # CO2e/kg
self.global_warming_potential_100.SO2 = -226 # CO2e/kg
self.global_warming_potential_100.NOx = 52 # CO2e/kg
self.global_warming_potential_100.Soot = 1166 # CO2e/kg
self.global_warming_potential_100.Contrails = 11 # kg/CO2e/km
