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# -*- coding: utf-8 -*-
"""Chakraborty model functions."""
import os
import math
from opem.Params import Chakraborty_InputParams as InputParams
from opem.Params import Chakraborty_Outparams as OutputParams
from opem.Params import Chakraborty_Params_Default as Defaults
from opem.Params import R, F, HHV
from opem.Static.Amphlett import Power_Calc, Power_Thermal_Calc, Power_Total_Calc, Linear_Aprox_Params_Calc, Max_Params_Calc
import opem.Functions
from opem.Params import Chakraborty_Description, Overall_Params_Max_Description, Overall_Params_Linear_Description, Report_Message
def Enernst_Calc(E0, N0, T, PH2, PO2, PH2O):
"""
Calculate Enernst.
:param E0: open cell voltage [V]
:type E0: float
:param N0: number of fuel cells in the stack
:type N0: int
:param T: cell operation temperature [K]
:type T: float
:param PH2: partial pressure [atm]
:type PH2: float
:param PO2: partial pressure [atm]
:type PO2: float
:param PH2O: partial pressure [atm]
:type PH2O: float
:return: Enernest [V] as float
"""
try:
result = N0 * (E0 - (R * T / (2 * F)) *
math.log((PH2 * math.sqrt(PO2)) / PH2O))
return result
except (TypeError, ZeroDivisionError, OverflowError, ValueError):
print(
"[Error] Enernst Calculation Failed (E0:%s, N0:%s, T:%s, PH2:%s, PO2:%s, PH2O:%s)" %
(str(E0), str(N0), str(T), str(PH2), str(PO2), str(PH2O)))
def PH2_Calc(KH2, u, I):
"""
Calculate PH2.
:param KH2: hydrogen valve constant [kmol.s^(-1).atm^(-1)]
:type KH2: float
:param u: fuel utilization ratio
:type u: float
:param I: cell load current [A]
:type I: float
:return: PH2 [atm] as float
"""
try:
result = ((1 / KH2) * ((1 / u) - 1) * I / (2 * F))
return result
except (TypeError, ZeroDivisionError):
print(
"[Error] PH2 Calculation Failed (KH2:%s, u:%s, I:%s)" %
(str(KH2), str(u), str(I)))
def PO2_Calc(KO2, u, rHO, I):
"""
Calculate PO2.
:param KO2: oxygen valve constant [kmol.s^(-1).atm^(-1)]
:type KO2: float
:param u: fuel utilization ratio
:type u: float
:param rHO: ratio of hydrogen to oxygen input flow rates
:type rHO: float
:param I: cell load current [A]
:type I: float
:return: PO2 [atm] as float
"""
try:
result = ((1 / KO2) * ((1 / (u * rHO)) - 0.5) * I / (2 * F))
return result
except (TypeError, ZeroDivisionError):
print(
"[Error] PO2 Calculation Failed (KO2:%s, u:%s, rHO:%s, I:%s)" %
(str(KO2), str(u), str(rHO), str(I)))
def PH2O_Calc(KH2O, I):
"""
Calculate PH2O.
:param KH2O: water valve constant [kmol.s^(-1).atm^(-1)]
:type KH2O: float
:param I: cell load current [A]
:type I: float
:return: PH2O [atm] as float
"""
try:
result = ((1 / KH2O) * I / (2 * F))
return result
except (TypeError, ZeroDivisionError):
print(
"[Error] PH2O Calculation Failed (KH2O:%s, I:%s)" %
(str(KH2O), str(I)))
def Nernst_Gain_Calc(T, I):
"""
Calculate Nernst gain.
:param T: cell operation temperature [K]
:type T: float
:param I: cell load current [A]
:type I: float
:return: Nernst gain [V] as float
"""
try:
return ((R * T) / (4 * F)) * math.log(I)
except TypeError:
print(
"[Error] Nernst Gain Calculation Error (T:%s, I:%s)" %
(str(T), str(I)))
def Ohmic_Loss_Calc(Rint, I):
"""
Calculate ohmic loss.
:param Rint: fuel cell internal resistance [ohm]
:type Rint: float
:param I: cell load current [A]
:type I: float
:return: ohmic loss [V] as float
"""
try:
return Rint * I
except TypeError:
print(
"[Error] Ohmic Loss Calculation Error (Rint:%s, I:%s)" %
(str(Rint), str(I)))
def Vcell_Calc(Enernst, Nernst_Gain, Ohmic_Loss, N):
"""
Calculate cell voltage.
:param Enernst: Enernst [V}
:type Enernst: float
:param Nernst_Gain: Nernst Gain [V]
:type Nernst_Gain: float
:param Ohmic_Loss: ohmic loss [V]
:type Ohmic_Loss: float
:param N: number of fuel cells in the stack
:type N: int
:return: cell voltage [V] as float
"""
try:
loss = Nernst_Gain - Ohmic_Loss
result = Enernst + (N * loss)
return result
except TypeError:
print(
"[Error] Vcell Calculation Error (Enernst:%s, Nernst_Gain:%s, Ohmic_Loss:%s, N:%s)" %
(str(Enernst), str(Nernst_Gain), str(Ohmic_Loss), str(N)))
def Efficiency_Calc(Vcell, u, N):
"""
Calculate PEM cell efficiency.
:param Vcell: cell voltage [V]
:type Vcell: float
:param u: fuel utilization ratio
:type u: float
:param N: number of fuel cells in the stack
:type N: int
:return: efficiency as float
"""
try:
result = (u * Vcell) / (N * HHV)
return result
except (TypeError, ZeroDivisionError):
print(
"[Error] PEM Efficiency Calculation Failed (Vcell:%s, u:%s, N:%s)" %
(str(Vcell), str(u), str(N)))
def Dynamic_Analysis(
InputMethod=opem.Functions.Get_Input,
TestMode=False,
PrintMode=True,
ReportMode=True,
Folder=os.getcwd()):
"""
Run Chakraborty analysis.
:param InputMethod: input function or input test vector
:type InputMethod: dict or Get_Input function object
:param TestMode: test mode flag
:type TestMode: bool
:param PrintMode: print mode control flag (True : print outputs)
:type PrintMode: bool
:param ReportMode: report mode control flag (True : generate report)
:type ReportMode: bool
:param Folder: output folder address
:type Folder: str
:return: result as dict
"""
OutputFile = None
CSVFile = None
Warning1 = False
Warning2 = False
I_Warning = 0
Overall_Params_Max = {}
Overall_Params_Linear = {}
Simulation_Title = "Chakraborty"
try:
if PrintMode:
print("###########")
print(Simulation_Title + "-Model Simulation")
print("###########")
OutputParamsKeys = sorted(OutputParams)
Output_Dict = dict(
zip(OutputParamsKeys, [None] * len(OutputParamsKeys)))
if not TestMode:
Input_Dict = InputMethod(InputParams, params_default=Defaults)
else:
Input_Dict = InputMethod
Input_Dict = opem.Functions.filter_default(
input_dict=Input_Dict, params_default=Defaults)
Input_Dict = opem.Functions.filter_lambda(Input_Dict)
if PrintMode:
print("Analyzing . . .")
Name = Input_Dict["Name"]
if ReportMode:
OutputFile = opem.Functions.Output_Init(
Input_Dict, Simulation_Title, Name, Folder)
CSVFile = opem.Functions.CSV_Init(
OutputParamsKeys,
OutputParams,
Simulation_Title,
Name,
Folder)
HTMLFile = opem.Functions.HTML_Init(Simulation_Title, Name, Folder)
IEnd = Input_Dict["i-stop"]
IStep = Input_Dict["i-step"]
Precision = opem.Functions.get_precision(IStep)
[i, IEnd, IStep] = opem.Functions.filter_range(
Input_Dict["i-start"], IEnd, IStep)
I_List = []
Power_List = []
Vstack_List = []
Efficiency_List = []
PH2_List = []
PO2_List = []
PH2O_List = []
Power_Thermal_List = []
Ohmic_Loss_List = []
Nernst_Gain_List = []
while i < IEnd:
try:
I_List.append(i)
Output_Dict["PO2"] = PO2_Calc(
Input_Dict["KO2"], Input_Dict["u"], Input_Dict["rho"], i)
Output_Dict["PH2"] = PH2_Calc(
Input_Dict["KH2"], Input_Dict["u"], i)
PH2_List.append(Output_Dict["PH2"])
PO2_List.append(Output_Dict["PO2"])
Output_Dict["PH2O"] = PH2O_Calc(
Input_Dict["KH2O"], i)
PH2O_List.append(Output_Dict["PH2O"])
Output_Dict["E"] = Enernst_Calc(
Input_Dict["E0"],
Input_Dict["N0"],
Input_Dict["T"],
Output_Dict["PH2"],
Output_Dict["PO2"],
Output_Dict["PH2O"])
Output_Dict["Nernst Gain"] = Nernst_Gain_Calc(
Input_Dict["T"], i)
Output_Dict["Ohmic Loss"] = Ohmic_Loss_Calc(Input_Dict["R"], i)
Nernst_Gain_List.append(Output_Dict["Nernst Gain"])
Ohmic_Loss_List.append(Output_Dict["Ohmic Loss"])
Output_Dict["FC Voltage"] = Vcell_Calc(
Output_Dict["E"],
Output_Dict["Nernst Gain"],
Output_Dict["Ohmic Loss"],
Input_Dict["N0"])
[Warning1, I_Warning] = opem.Functions.warning_check_1(
Output_Dict["FC Voltage"], I_Warning, i, Warning1)
Warning2 = opem.Functions.warning_check_2(
Vcell=Output_Dict["FC Voltage"],
warning_flag=Warning2)
Vstack_List.append(Output_Dict["FC Voltage"])
Output_Dict["FC Efficiency"] = Efficiency_Calc(
Output_Dict["FC Voltage"], Input_Dict["u"], Input_Dict["N0"])
Efficiency_List.append(Output_Dict["FC Efficiency"])
Output_Dict["FC Power"] = Power_Calc(
Output_Dict["FC Voltage"], i)
Output_Dict["Power-Thermal"] = Power_Thermal_Calc(
VStack=Output_Dict["FC Voltage"], N=Input_Dict["N0"], i=i)
Power_List.append(Output_Dict["FC Power"])
Power_Thermal_List.append(Output_Dict["Power-Thermal"])
if ReportMode:
opem.Functions.Output_Save(
OutputParamsKeys,
Output_Dict,
OutputParams,
i,
OutputFile,
PrintMode)
opem.Functions.CSV_Save(
OutputParamsKeys, Output_Dict, i, CSVFile)
i = opem.Functions.rounder(i + IStep, Precision)
except Exception as e:
print(str(e))
i = opem.Functions.rounder(i + IStep, Precision)
if ReportMode:
opem.Functions.Output_Save(
OutputParamsKeys,
Output_Dict,
OutputParams,
i,
OutputFile,
PrintMode)
opem.Functions.CSV_Save(
OutputParamsKeys, Output_Dict, i, CSVFile)
[Estimated_V, B0, B1] = opem.Functions.linear_plot(
x=I_List, y=Vstack_List)
Linear_Approx_Params = Linear_Aprox_Params_Calc(B0, B1)
Max_Params = Max_Params_Calc(Power_List, Efficiency_List, Vstack_List)
Power_Total = Power_Total_Calc(Vstack_List, IStep, Input_Dict["N0"])
Overall_Params_Linear["Pmax(L-Approx)"] = Linear_Approx_Params[0]
Overall_Params_Linear["V0"] = B0
Overall_Params_Linear["K"] = B1
Overall_Params_Linear["VFC|Pmax(L-Approx)"] = Linear_Approx_Params[1]
Overall_Params_Max["Pmax"] = Max_Params["Max_Power"]
Overall_Params_Max["VFC|Pmax"] = Max_Params["Max_VStack"]
Overall_Params_Max["Efficiency|Pmax"] = Max_Params["Max_EFF"]
Overall_Params_Max["Ptotal(Elec)"] = Power_Total[0]
Overall_Params_Max["Ptotal(Thermal)"] = Power_Total[1]
if ReportMode:
OutputFile.close()
CSVFile.close()
if PrintMode:
print(Report_Message)
opem.Functions.HTML_Desc(
Simulation_Title,
Chakraborty_Description,
HTMLFile)
opem.Functions.HTML_Input_Table(
Input_Dict=Input_Dict,
Input_Params=InputParams,
file=HTMLFile)
opem.Functions.HTML_Overall_Params_Table(
Overall_Params_Max,
Overall_Params_Max_Description,
file=HTMLFile,
header=True)
opem.Functions.HTML_Chart(
x=str(I_List),
y=str(Power_List),
color='rgba(255,99,132,1)',
x_label="I(A)",
y_label="P(W)",
chart_name="FC-Power",
size="600px",
file=HTMLFile)
opem.Functions.HTML_Chart(
x=str(I_List), y=[
str(Vstack_List), str(Estimated_V)], color=[
'rgba(99,100,255,1)', 'rgb(238, 210, 141)'], x_label="I(A)", y_label="V(V)", chart_name=[
"FC-Voltage", "Linear-Apx"], size="600px", file=HTMLFile)
opem.Functions.HTML_Overall_Params_Table(
Overall_Params_Linear,
Overall_Params_Linear_Description,
file=HTMLFile,
header=False)
opem.Functions.HTML_Chart(
x=str(I_List), y=[
str(Nernst_Gain_List), str(Ohmic_Loss_List)], color=[
'rgba(99,100,255,1)', 'rgb(128, 0, 255)'], x_label="I(A)", y_label="V(V)", chart_name=[
"Nernst Gain", "Ohmic Loss"], size="600px", file=HTMLFile)
opem.Functions.HTML_Chart(
x=str(I_List),
y=str(Efficiency_List),
color='rgb(255, 0, 255)',
x_label="I(A)",
y_label="EFF",
chart_name="Efficiency",
size="600px",
file=HTMLFile)
opem.Functions.HTML_Chart(
x=str(I_List),
y=str(PO2_List),
color=' rgb(0, 255, 128)',
x_label="I(A)",
y_label="PO2(atm)",
chart_name="PO2",
size="600px",
file=HTMLFile)
opem.Functions.HTML_Chart(
x=str(I_List),
y=str(PH2_List),
color=' rgb(128, 0, 255)',
x_label="I(A)",
y_label="PH2(atm)",
chart_name="PH2",
size="600px",
file=HTMLFile)
opem.Functions.HTML_Chart(
x=str(I_List),
y=str(PH2O_List),
color=' rgb(165, 185, 112)',
x_label="I(A)",
y_label="PH2O(atm)",
chart_name="PH2O",
size="600px",
file=HTMLFile)
opem.Functions.HTML_Chart(x=str(list(map(opem.Functions.rounder,
Power_List))),
y=str(Efficiency_List),
color='rgb(238, 210, 141)',
x_label="P(W)",
y_label="EFF",
chart_name="Efficiency vs Power",
size="600px",
file=HTMLFile)
opem.Functions.HTML_Chart(
x=str(I_List),
y=str(Power_Thermal_List),
color='rgb(255, 0, 255)',
x_label="I(A)",
y_label="P(W)",
chart_name="Power(Thermal)",
size="600px",
file=HTMLFile)
opem.Functions.warning_print(
warning_flag_1=Warning1,
warning_flag_2=Warning2,
I_Warning=I_Warning,
file=HTMLFile,
PrintMode=PrintMode)
opem.Functions.HTML_End(HTMLFile)
HTMLFile.close()
if PrintMode:
print("Done!")
if not TestMode:
if PrintMode:
print(
"Result In -->" +
os.path.join(
os.getcwd(),
Simulation_Title))
else:
return {
"Status": True,
"P": Power_List,
"I": I_List,
"V": Vstack_List,
"Nernst Gain": Nernst_Gain_List,
"Ohmic Loss": Ohmic_Loss_List,
"EFF": Efficiency_List,
"PO2": PO2_List,
"PH2": PH2_List,
"PH2O": PH2O_List,
"Ph": Power_Thermal_List,
"V0": B0,
"K": B1,
"VE": Estimated_V}
except Exception:
if TestMode:
return {
"Status": False,
"Message": "[Error] " +
Simulation_Title +
" Simulation Failed!(Check Your Inputs)"}
print(
"[Error] " +
Simulation_Title +
" Simulation Failed!(Check Your Inputs)")
|
