Georg_Brantegger/Python-DT_Slot_3
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code cleanup:

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consistenly use getter and setter methods
commenting etc
This commit is contained in:
Brantegger Georg
2022-07-27 11:40:58 +02:00
parent ac8bfdb7c6
commit d1c15090dc
13 changed files with 956 additions and 584 deletions
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121
Turbinen/Turbinen_class_file.py
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@@ -1,3 +1,4 @@
from time import time
import numpy as np
#importing pressure conversion function
import sys
@@ -8,35 +9,117 @@ sys.path.append(parent)
from functions.pressure_conversion import pressure_conversion
class Francis_Turbine:
def __init__(self, Q_nenn,p_nenn):
self.Q_n = Q_nenn
self.p_n = p_nenn
self.LA_n = 1. # 100%
h = pressure_conversion(p_nenn,'Pa','MWs')
self.A = Q_nenn/(np.sqrt(2*9.81*h)*0.98)
# units
# make sure that units and print units are the same
# units are used to label graphs and print units are used to have a bearable format when using pythons print()
density_unit = r'$\mathrm{kg}/\mathrm{m}^3$'
flux_unit = r'$\mathrm{m}^3/\mathrm{s}$'
LA_unit = '%'
pressure_unit = 'Pa'
time_unit = 's'
velocity_unit = r'$\mathrm{m}/\mathrm{s}$'
volume_unit = r'$\mathrm{m}^3$'
def set_LA(self,LA):
density_unit_print = 'kg/m³'
flux_unit_print = 'm³/s'
LA_unit_print = '%'
pressure_unit_print = 'mWS'
time_unit_print = 's'
velocity_unit_print = 'm/s'
volume_unit_print = 'm³'
g = 9.81 # m/s² gravitational acceleration
# init
def __init__(self, Q_nenn,p_nenn,t_closing=-1.,timestep=-1.):
self.Q_n = Q_nenn # nominal flux
self.p_n = p_nenn # nominal pressure
self.LA_n = 1. # 100% # nominal Leitapparatöffnung
h = pressure_conversion(p_nenn,'Pa','MWs') # nominal pressure in terms of hydraulic head
self.A = Q_nenn/(np.sqrt(2*self.g*h)*0.98) # Ersatzfläche
self.dt = timestep # simulation timestep
self.t_c = t_closing # closing time
self.d_LA_max_dt = 1/t_closing # maximal change of LA per second
# initialize for get_info() - parameters will be converted to display -1 if not overwritten
self.p = pressure_conversion(-1,self.pressure_unit_print,self.pressure_unit)
self.Q = -1.
self.LA = -0.01
# setter
def set_LA(self,LA,display_warning=True):
# set Leitapparatöffnung
self.LA = LA
# warn user, that the .set_LA() method should not be used ot set LA manually
if display_warning == True:
print('Consider using the .update_LA() method instead of setting LA manually')
def set_timestep(self,timestep,display_warning=True):
# set Leitapparatöffnung
self.dt = time
# warn user, that the .set_LA() method should not be used ot set LA manually
if display_warning == True:
print('WARNING: You are changing the timestep of the turbine simulation. This has implications on the simulated closing speed!')
def set_pressure(self,pressure):
# set pressure in front of the turbine
self.p = pressure
def get_Q(self):
#getter
def get_current_Q(self):
# return the flux through the turbine, based on the current pressure in front
# of the turbine and the Leitapparatöffnung
self.Q = self.Q_n*(self.LA/self.LA_n)*np.sqrt(self.p/self.p_n)
return self.Q
def set_closing_time(self,t_closing):
self.t_c = t_closing
self.d_LA_max_dt = 1/t_closing
def get_current_LA(self):
return self.LA
def change_LA(self,LA_soll,timestep):
LA_diff = self.LA-LA_soll
LA_diff_max = self.d_LA_max_dt*timestep
if abs(LA_diff) > LA_diff_max:
LA_diff = np.sign(LA_diff)*LA_diff_max
self.LA = self.LA-LA_diff
def get_info(self, full = False):
new_line = '\n'
p = pressure_conversion(self.p,self.pressure_unit,self.pressure_unit_print)
p_n = pressure_conversion(self.p_n,self.pressure_unit,self.pressure_unit_print)
if full == True:
# :<10 pads the self.value to be 10 characters wide
print_str = (f"Turbine has the following attributes: {new_line}"
f"----------------------------- {new_line}"
f"Type = Francis {new_line}"
f"Nominal flux = {self.Q_n:<10} {self.flux_unit_print} {new_line}"
f"Nominal pressure = {round(p_n,3):<10} {self.pressure_unit_print}{new_line}"
f"Nominal LA = {self.LA_n*100:<10} {self.LA_unit_print} {new_line}"
f"Closing time = {self.t_c:<10} {self.time_unit_print} {new_line}"
f"Current flux = {self.Q:<10} {self.flux_unit_print} {new_line}"
f"Current pipe pressure = {round(p,3):<10} {self.pressure_unit_print} {new_line}"
f"Current LA = {self.LA*100:<10} {self.LA_unit_print} {new_line}"
f"Simulation timestep = {self.dt:<10} {self.time_unit_print} {new_line}"
f"----------------------------- {new_line}")
else:
# :<10 pads the self.value to be 10 characters wide
print_str = (f"The current attributes are: {new_line}"
f"----------------------------- {new_line}"
f"Current flux = {self.Q:<10} {self.flux_unit_print} {new_line}"
f"Current pipe pressure = {round(p,3):<10} {self.pressure_unit_print} {new_line}"
f"Current LA = {self.LA*100:<10} {self.LA_unit_print} {new_line}"
f"----------------------------- {new_line}")
print(print_str)
# methods
def update_LA(self,LA_soll):
# update the Leitappartöffnung and consider the restrictions of the closing time of the turbine
LA_diff = self.LA-LA_soll # calculate the difference to the target LA
LA_diff_max = self.d_LA_max_dt*self.dt # calculate the maximum change in LA based on the given timestep
LA_diff = np.sign(LA_diff)*np.min(np.abs([LA_diff,LA_diff_max])) # calulate the correct change in LA
self.set_LA(self.LA-LA_diff,display_warning=False) # set new LA
def set_steady_state(self,ss_flux,ss_pressure):
# calculate and set steady state LA, that allows the flow of ss_flux at ss_pressure through the
# turbine at the steady state LA
ss_LA = self.LA_n*ss_flux/self.Q_n*np.sqrt(self.p_n/ss_pressure)
self.set_LA(ss_LA)
if ss_LA < 0 or ss_LA > 1:
print('LA out of range')
raise Exception('LA out of range [0;1]')
self.set_LA(ss_LA,display_warning=False)