Source code for RCAIDE.Library.Methods.Powertrain.Converters.Reformer.compute_reformer_performance
# RCAIDE/Library/Methods/Powertrain/Converters/Reformer/compute_reformer_performance.py
#
# Created: Jan 2025, M. Clarke, M. Guidotti
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# IMPORT
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# package imports
from RCAIDE.Framework.Core import Units
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# compute_reformer_performance
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[docs]
def compute_reformer_performance(reformer,reformer_conditions):
"""
Computes performance characteristics of an autothermal reformer converting jet fuel to hydrogen-rich reformate.
Parameters
----------
reformer : Reformer
Reformer component containing physical and operational parameters
reformer_conditions : Conditions
Container for reformer operating conditions including feed rates
Returns
-------
None
Updates reformer_conditions in-place with computed performance parameters:
- effluent_gas_flow_rate : float
Reformer effluent gas flow rate [sccm]
- reformer_efficiency : float
Overall reformer efficiency [%]
- hydrogen_conversion_efficiency : float
Hydrogen conversion efficiency [%]
- space_velocity : float
Gas hourly space velocity [hr^-1]
- liquid_space_velocity : float
Liquid hourly space velocity [hr^-1]
- steam_to_carbon_feed_ratio : float
Molar ratio of steam to carbon [mol_H2O/mol_C]
- oxygen_to_carbon_feed_ratio : float
Molar ratio of oxygen to carbon [mol_O/mol_C]
- fuel_to_air_ratio : float
Equivalence ratio [-]
Notes
-----
This function calculates key performance metrics for an autothermal reformer including:
- Molar flow rates of reactants and products
- Space velocities
- Feed ratios
- Conversion efficiencies
**Major Assumptions**
* Steady state operation
* Complete mixing of reactants
* Uniform catalyst bed temperature
* No pressure drop across catalyst bed
* Ideal gas behavior for air and reformate
* Standard conditions (1 atm, 273.15 K) for gas flow rates
See Also
--------
RCAIDE.Library.Components.Powertrain.Converters.Reformer
"""
Q_F = reformer_conditions.fuel_volume_flow_rate/(Units.cm**3/Units.hr) # [cm**3/hr] Jet-A feed rate
Q_S = reformer_conditions.steam_volume_flow_rate/(Units.cm**3/Units.hr) # [cm**3/hr] Deionized water feed rate
Q_A = reformer_conditions.air_volume_flow_rate/(Units.cm**3/Units.min) # [sccm] Air feed rate
# Molar Feed Rates
F_F = Q_F * reformer.rho_F / reformer.MW_F # [g-mol/hr] molar flow rate of Jet-A
F_S = Q_S * reformer.rho_S / reformer.MW_S # [g-mol/hr] molar flow rate of steam
F_A = Q_A / 22414 # [g-mol/hr] molar flow rate of air
F_C = Q_F * reformer.rho_F * reformer.x_C / reformer.MW_C # [g-mol/hr] molar flow rate of carbon
# Effluent Gas Molar Flow Rate
Q_R = (Q_F/60) + (Q_S/60) + Q_A # [sccm] Reformer effluent gas feed rate
F_R = Q_R * 60 / 22414 # [g-mol/hr] reformate effluent gas molar flow rate
# Space Velocity
GHSV = ((F_F + F_S + F_A) / reformer.V_cat) * 22410 # [hr**-1] gas hourly space velocity
LHSV = Q_F / reformer.V_cat # [hr**-1] liquid hourly space velocity
# Steam to Carbon, Oxygen to Carbon and Equivalence Ratio
S_C = F_S / F_C # [mol_H20/mol_C] Steam-to-Carbon feed ratio
O_C = 2 * 0.21 * F_A / F_C # [mol_O/mol_C] Oxygen-to-Carbon feed ratio
phi = reformer.A_F_st_Jet_A * (Q_F * reformer.rho_F) / ((Q_A * 60) * reformer.rho_A) # [-] Fuel to Air ratio
# Reformer efficiency
eta_ref = ((reformer.y_H2 * reformer.LHV_H2 + reformer.y_CO * reformer.LHV_CO) * F_R / (Q_F * reformer.rho_F * reformer.LHV_F)) * 100 # [-] Reformer efficiency
# Hydrogen conversion efficiency
X_H2 = ((reformer.y_H2 * F_R)/ (((Q_F * reformer.rho_F * reformer.x_H)/(reformer.MW_H2)) + F_S)) * 100 # [-] Hydrogen conversion efficiency
reformer_conditions.effluent_gas_flow_rate = Q_R
reformer_conditions.reformer_efficiency = eta_ref
reformer_conditions.hydrogen_conversion_efficiency = X_H2
reformer_conditions.space_velocity = GHSV
reformer_conditions.liquid_space_velocity = LHSV
reformer_conditions.steam_to_carbon_feed_ratio = S_C
reformer_conditions.oxygen_to_carbon_feed_ratio = O_C
reformer_conditions.fuel_to_air_ratio = phi
return