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cpgui_cycle1.py
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# -*- coding: utf-8 -*-
#
import sys
from tkinter import *
from tkinter import ttk
import CoolProp
from CoolProp.CoolProp import PropsSI
from cpgui_all import *
import gettext
import numpy as np
from PIL import ImageTk, Image
from scipy.optimize import bisect
class cpg_cycle1(myDialog):
def __init__(self, CycleFrame,Caller,Debug=False):
#
self.initcomplete=False
#
self.Caller=Caller
#
# by module translations
self.language=cpgui_language
localedir=find_data_file('locale')
self.lang = gettext.translation('cpg_cycle1', localedir=localedir, languages=[self.language])
self.lang.install()
#
self.Debug=Debug
#
# add all input variables to the following list
self.VarVal ={'t0':273.15,
'dt0h':10,
'dp0':10000,
'Q0':1000,
'tc':273.15+45,
'dtu':5,
'dpc':10000,
'sl_dth':10,
'sl_dp':10000,
'dl_dtu':18,
'dl_dp':10000,
'comp_eta':0.6}
#
# create data structure like below to generate input form
self.InputPanels ={'Evaporator':{'Title':_('Evaporator'),
'row':1, # row of Evaporator Frame in InputFrame
'col':1, # coloumn of Evaporator Frame in InputFrame
'order':['t0','dt0h','dp0','Q0'], # Input fields order of appearance
't0':[_('Temperature'),self.VarVal['t0'],GUI_UNIT('T'),'T'], # Input fields, Label, Variable to change, Unit Label / this List will be extended by a tkinter StringVar for callback on change
'dt0h':[_('Superheat'),self.VarVal['dt0h'],GUI_UNIT('dT'),'dT'],
'dp0':[_('Pressure drop'),self.VarVal['dp0'],GUI_UNIT('p'),'p'],
'Q0':[_('Capacity'),self.VarVal['Q0'],GUI_UNIT('P'),'P'],
},
'Condenser':{'Title':_('Condenser'),
'row':1,
'col':2,
'order':['tc','dtu','dpc','empty'],
'tc':[_('Temperature'),self.VarVal['tc'],GUI_UNIT('T'),'T'],
'dtu':[_('Subcooling'),self.VarVal['dtu'],GUI_UNIT('dT'),'dT'],
'dpc':[_('Pressure drop'),self.VarVal['dpc'],GUI_UNIT('p'),'p'],
'empty':[' '],
},
'Pipes':{'Title':_('Suction line SL / Discharge line DL'),
'row':1,
'col':3,
'order':['sl_dth','sl_dp','dl_dtu','dl_dp'],
'sl_dth':[_('SL superheat'),self.VarVal['sl_dth'],GUI_UNIT('dT'),'dT'],
'sl_dp':[_('SL Pressure drop'),self.VarVal['sl_dp'],GUI_UNIT('p'),'p'],
'dl_dtu':[_('DL Temperature loss'),self.VarVal['dl_dtu'],GUI_UNIT('dT'),'dT'],
'dl_dp':[_('DL Pressure drop'),self.VarVal['dl_dp'],GUI_UNIT('p'),'p'],
},
'Compressor':{'Title':_('Compressor'),
'row':2,
'col':1,
'order':['comp_eta'],
'comp_eta':[_('Isentropic efficiency'),self.VarVal['comp_eta'],GUI_UNIT('eta'),'eta'],
},
}
#
self.Caller=Caller
self.ref=Caller.get_ref()
#
self.frameborder=5
#
self.statetext=' '
#
self.InfoDict={'1' :('1', _('End of SL / compressor intake')),
'2s' :('2s', _('Isentropic compression')),
'2' :('2', _('Real compression')),
'3' :('3', _('Condenser inlet')),
'3dew' :('3\'\'', _('Dewpoint inside condenser')),
'3dewm4bub' :('3\'\'m4\'', _('Average between 3\'\' and 4\'')),
'4bub' :('4\'', _('Bubblepoint inside condenser')),
'4' :('4', _('Exit condenser')),
'5' :('5', _('Evaporator entry')),
'5m6dew' :('5m6\'\'', _('Average between 5 and 6\'\'')),
'6dew' :('6\'\'', _('Dewpoint inside evaporator')),
'6' :('6', _('Exit evaporator')),
'order' :('1','2s','2','3','3dew','3dewm4bub','4bub','4','5','5m6dew','6dew','6'),
}
# Frames for input and output
self.InputFrame= LabelFrame(CycleFrame,relief=GROOVE,bd=self.frameborder,text=_('Cycle inputs'),font=("Arial", 10, "bold"))
self.InputFrame.grid(row=1,column=1,padx=8,pady=5,sticky=W)
self.OutputFrame= LabelFrame(CycleFrame,relief=GROOVE,bd=self.frameborder,text=_('Cycle outputs'),font=("Arial", 10,"bold"))
self.OutputFrame.grid(row=3,column=1,padx=8,pady=5,sticky=EW,rowspan=10,columnspan=3)
#
# create Inputs form
#
for key in self.InputPanels :
self.GridInputPanel(self.InputFrame,key,Debug=False)
#
self.Button_1 = Button(self.InputFrame,text=_(' Calculate '),font=("Arial", 12, "bold") )
self.Button_1.grid(row=2,rowspan=1,column=3,pady=5,sticky=W,padx=8)
self.Button_1.bind("<ButtonRelease-1>", self.calculate)
#
# Output
#
self.out_nb = ttk.Notebook(self.OutputFrame)
self.out_nb.pack(fill = 'both', expand = 1, padx = 5, pady = 5)
#
self.tab1_frame = ttk.Frame(self.OutputFrame)
self.tab2_frame = ttk.Frame(self.OutputFrame)
self.tab3_frame = ttk.Frame(self.OutputFrame)
# tab 1 cycle display and selection
self.out_nb.add(self.tab1_frame,text=_('Cycle information'))
#
self.InfoFrame= LabelFrame(self.tab1_frame,relief=GROOVE,bd=self.frameborder,text=_('Statepoints'),font=("Arial", 10, "bold"))
self.InfoFrame.grid(row=1,column=1,padx=8,pady=5,sticky=W)
inforow=1
for point in self.InfoDict['order']:
pl=Label(self.InfoFrame,text='{:<10}'.format(self.InfoDict[point][0]),font=("Arial", 10) )
pl.grid(row=inforow,rowspan=1,column=1,pady=2,sticky=W,padx=2)
tl=Label(self.InfoFrame,text='{:<35}'.format(self.InfoDict[point][1]),font=("Arial", 10) )
tl.grid(row=inforow,rowspan=1,column=2,pady=2,sticky=W,padx=2)
inforow+=1
self.cycle1png=find_data_file('simplecycle.png')
imgfile = Image.open(self.cycle1png)
render = ImageTk.PhotoImage(imgfile)
img = Label(self.tab1_frame, image=render)
img.image = render
img.grid(row=1,column=2,pady=5,sticky=NS,padx=8)
#
self.out_nb.add(self.tab2_frame,text=_('Output table'))
#
self.statetext=' '
lbframe1 = Frame( self.tab2_frame )
self.Text_1_frame = lbframe1
scrollbar1 = Scrollbar(lbframe1, orient=VERTICAL)
self.Text_1 = Text(lbframe1, width="110", height="25", yscrollcommand=scrollbar1.set)
scrollbar1.config(command=self.Text_1.yview)
scrollbar1.pack(side=RIGHT, fill=Y)
self.Text_1.pack(side=LEFT, fill=BOTH, expand=1)
self.Text_1_frame.grid(row=1,column=1,columnspan=1,padx=2,sticky=W+E,pady=4)
self.Text_1.delete(1.0, END)
#
self.out_nb.bind_all("<<NotebookTabChanged>>", self.tabChangedEvent)
self.initcomplete=True
def GridInputPanel(self,GridInputFrame,PanelKey,Debug=False,tfont=("Arial", 10, "bold"),font=("Arial", 10)):
#
LineList=self.InputPanels[PanelKey]['order']
GIPanel=LabelFrame(GridInputFrame,relief=GROOVE,bd=5,text=self.InputPanels[PanelKey]['Title'])
GIPanel.grid(row=self.InputPanels[PanelKey]['row'],column=self.InputPanels[PanelKey]['col'],padx=8,pady=5,sticky=W)
#
i=1
for k in self.InputPanels[PanelKey]['order'] :
if self.InputPanels[PanelKey][k][0] != ' ' :
self.InputPanels[PanelKey][k].append(StringVar())
outval=SI_TO(self.InputPanels[PanelKey][k][-2], self.InputPanels[PanelKey][k][1])
#print('cycle 1 : GridInputPanel : SI_TO : ',outval)
#self.InputPanels[PanelKey][k][-1].set('%f'%self.InputPanels[PanelKey][k][1])
self.InputPanels[PanelKey][k][-1].set(outval)
self.InputPanels[PanelKey][k][-1].trace("w", lambda name, index, mode, var=self.InputPanels[PanelKey][k][-1],quantity=self.InputPanels[PanelKey][k][-2], key=k: self.GridInputPanelUpdate(var, key, quantity))
Label(GIPanel, text=self.InputPanels[PanelKey][k][0],font=font).grid(column=1, row=i,padx=8,pady=5,sticky=W)
Entry(GIPanel, width=15, textvariable=self.InputPanels[PanelKey][k][-1],font=font).grid(column=2, row=i,padx=8,pady=5,sticky=W)
Label(GIPanel, text=self.InputPanels[PanelKey][k][2],font=font).grid(column=3, row=i,padx=8,pady=5,sticky=W)
else :
Label(GIPanel, text=' ',font=font).grid(column=1, row=i,padx=8,pady=5,sticky=W)
#
i+=1
#
def GridInputPanelUpdate(self, sv,key,quantity):
#print(sv, key, sv.get(),quantity)
#self.VarVal[key]=sv.get()
try :
self.VarVal[key]=TO_SI(quantity,float(sv.get().replace(',','.')))
except ValueError :
pass
#print( key,self.VarVal[key])
def tabChangedEvent(self,event):
self.ref=self.Caller.get_ref()
def calculate(self,event):
#
self.ref=self.Caller.get_ref()
#
self.t0=self.VarVal['t0'] # Evaporation temperature in °C
self.dt0h=self.VarVal['dt0h'] # Superheat in K
self.dp0=self.VarVal['dp0'] # pressure drop evaporator in bar
self.Q0=self.VarVal['Q0'] # refrigeration capacity in W
#
self.tc=self.VarVal['tc'] # condensation temperature in °C
self.dtu=self.VarVal['dtu'] # subcooling in K
self.dpc=self.VarVal['dpc'] # pressure drop condenser in bar
#
self.sl_dth=self.VarVal['sl_dth'] # superheat suction line in K
self.sl_dp=self.VarVal['sl_dp'] # pressure drop suction line in bar
self.dl_dtu=self.VarVal['dl_dtu'] # subcooling discharge line in K
self.dl_dp=self.VarVal['dl_dp'] # pressure drop discharge line in bar
#
self.comp_eta=self.VarVal['comp_eta'] # Compressor isentropic efficiency
#
self.statetext=_('Simple DX cycle statepoint Table for %s\n\n')%self.ref
self.statetext+=(" Point | t | p | v | h | s | x | Description \n")
self.datarow= " %6s | %6.2f | %6.2f | %10.5f | %7.2f | %7.4f | %7s | %s \n"
self.statetext+=" | {} | {} | {} | {} | {} | {} | \n".format(GUI_UNIT('T'),GUI_UNIT('p'),GUI_UNIT('v'),GUI_UNIT('H'),GUI_UNIT('S'),GUI_UNIT('Q'),)
self.statetext+= "-------------------------------------------------------------------------------------------------\n"
self.row={}
# point 6dew
name='6dew'
p6dew=PropsSI('P','T',self.t0,'Q',1,self.ref)
t6dew=self.t0
v6dew=1/PropsSI('D','T',self.t0,'Q',1,self.ref)
h6dew=PropsSI('H','T',self.t0,'Q',1,self.ref)
s6dew=PropsSI('S','T',self.t0,'Q',1,self.ref)
x6dew=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t6dew),SI_TO('p',p6dew),v6dew,SI_TO('H',h6dew),SI_TO('S',s6dew),x6dew,self.InfoDict[name][1])
# superheat on evaporator exit
name='6'
p6=p6dew
t6=self.t0+self.dt0h
v6=1/PropsSI('D','T',t6,'P',p6,self.ref)
h6=PropsSI('H','T',t6,'P',p6,self.ref)
s6=PropsSI('S','T',t6,'P',p6,self.ref)
x6=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t6),SI_TO('p',p6),v6,SI_TO('H',h6),SI_TO('S',s6),x6,self.InfoDict[name][1])
# + superheat and pressure drop suction line
name='1'
p1=p6-self.sl_dp
t1=t6+self.sl_dth
v1=1/PropsSI('D','T',t1,'P',p1,self.ref)
h1=PropsSI('H','T',t1,'P',p1,self.ref)
s1=PropsSI('S','T',t1,'P',p1,self.ref)
x1=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t1),SI_TO('p',p1),v1,SI_TO('H',h1),SI_TO('S',s1),x1,self.InfoDict[name][1])
# isentropic compression
name='2s'
p2s=PropsSI('P','T',self.tc,'Q',1,self.ref)+self.dl_dp
s2s=s1
try :
t2s=PropsSI('T','P',p2s,'S',s2s,self.ref)
except ValueError :
t2s=bisect(lambda T: PropsSI('S','T',T,'P',p2s,self.ref)-s2s,t1,493,xtol=0.01)
print('t2s : ',t2s)
v2s=1/PropsSI('D','T',t2s,'P',p2s,self.ref)
h2s=PropsSI('H','T',t2s,'P',p2s,self.ref)
x2s=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t2s),SI_TO('p',p2s),v2s,SI_TO('H',h2s),SI_TO('S',s2s),x2s,self.InfoDict[name][1])
# real compression
name='2'
p2=p2s
h2=h1+(h2s-h1)/self.comp_eta
try :
t2=PropsSI('T','P',p2,'H',h2,self.ref)
except ValueError :
t2=bisect(lambda T: PropsSI('H','T',T,'P',p2,self.ref)-h2,t2s,493,xtol=0.01)
print('t2 : ',t2)
v2=1/PropsSI('D','T',t2,'P',p2,self.ref)
s2=PropsSI('S','T',t2,'P',p2,self.ref)
x2=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t2),SI_TO('p',p2),v2,SI_TO('H',h2),SI_TO('S',s2),x2,self.InfoDict[name][1])
# condenser entry
name='3'
p3=p2-self.dl_dp
t3=t2-self.dl_dtu
h3=PropsSI('H','P',p3,'T',t3,self.ref)
v3=1/PropsSI('D','T',t3,'P',p3,self.ref)
s3=PropsSI('S','T',t3,'P',p3,self.ref)
x3=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t3),SI_TO('p',p3),v3,SI_TO('H',h3),SI_TO('S',s3),x3,self.InfoDict[name][1])
# inside condenser dewpoint
name='3dew'
t3dew=self.tc
p3dew=PropsSI('P','T',t3dew,'Q',1,self.ref)
h3dew=PropsSI('H','P',p3dew,'Q',1,self.ref)
v3dew=1/PropsSI('D','P',p3dew,'Q',1,self.ref)
s3dew=PropsSI('S','P',p3dew,'Q',1,self.ref)
x3dew=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t3dew),SI_TO('p',p3dew),v3dew,SI_TO('H',h3dew),SI_TO('S',s3dew),x3dew,self.InfoDict[name][1])
# inside condenser bubblepoint
name='4bub'
p4bub=p3dew-self.dpc
t4bub=PropsSI('T','P',p4bub,'Q',0,self.ref)
h4bub=PropsSI('H','P',p4bub,'Q',0,self.ref)
v4bub=1/PropsSI('D','P',p4bub,'Q',0,self.ref)
s4bub=PropsSI('S','P',p4bub,'Q',0,self.ref)
x4bub=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t4bub),SI_TO('p',p4bub),v4bub,SI_TO('H',h4bub),SI_TO('S',s4bub),x4bub,self.InfoDict[name][1])
# condenser exit
name='4'
p4=p4bub
t4=t4bub-self.dtu
h4=PropsSI('H','P',p4,'T',t4,self.ref)
v4=1/PropsSI('D','P',p4,'T',t4,self.ref)
s4=PropsSI('S','P',p4,'T',t4,self.ref)
x4=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t4),SI_TO('p',p4),v4,SI_TO('H',h4),SI_TO('S',s4),x4,self.InfoDict[name][1])
# evaporator entry
name='5'
p5=p6dew+self.dp0
t5=PropsSI('T','P',p5,'H',h4,self.ref)
h5=h4
v5=1/PropsSI('D','P',p5,'H',h5,self.ref)
s5=PropsSI('S','P',p5,'H',h5,self.ref)
x5=PropsSI('Q','P',p5,'H',h5,self.ref)
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t5),SI_TO('p',p5),v5,SI_TO('H',h5),SI_TO('S',s5),'%5.4f'%x5,self.InfoDict[name][1])
#
name='3dewm4bub'
p3dewm4bub=(p4bub+p3dew)/2
t3dewm4bub=(t4bub+t3dew)/2
h3dewm4bub=(h4bub+h3dew)/2
v3dewm4bub=(v4bub+v3dew)/2
s3dewm4bub=(s4bub+s3dew)/2
x3dewm4bub=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t3dewm4bub),SI_TO('p',p3dewm4bub),v3dewm4bub,SI_TO('H',h3dewm4bub),SI_TO('S',s3dewm4bub),x3dewm4bub,self.InfoDict[name][1])
#
name='5m6dew'
p5m6dew=(p5+p6dew)/2
t5m6dew=(t5+t6dew)/2
h5m6dew=(h5+h6dew)/2
v5m6dew=(v5+v6dew)/2
s5m6dew=(s5+s6dew)/2
x5m6dew=' '
self.row[name]=self.datarow%(self.InfoDict[name][0],SI_TO('T',t5m6dew),SI_TO('p',p5m6dew),v5m6dew,SI_TO('H',h5m6dew),SI_TO('S',s5m6dew),x5m6dew,self.InfoDict[name][1])
#
for point in self.InfoDict['order']:
self.statetext+=self.row[point]
#massflux
# from here units need to be fixed
self.mdot=SI_TO('P',self.Q0)/(h6-h5)
self.statetext+=_('\nPower calculations | Key performance values\n')
self.statetext+=_('Evaporator %8.2f kW | Pressure ratio %8.2f (%8.2f)\n')%(SI_TO('P',self.Q0),(p3dew/p6),(p2/p1))
self.statetext+=_('Condenser %8.2f kW | Pressure difference %8.2f (%8.2f) %s\n')%(((h3-h4)*self.mdot),SI_TO('p',p3dew-p6),SI_TO('p',p2-p1),GUI_UNIT('p'))
self.statetext+=_('Suction line %8.2f kW | Mass flow %8.6f g/s \n')%(((h1-h6)*self.mdot),(self.mdot*1000*1000))
self.statetext+=_('Discharge line %8.2f kW | Volume flow (suction line) %8.4f m³/h \n')%(((h2-h3)*self.mdot),(self.mdot*1000*3600*v1))
self.statetext+=_('Compressor %8.2f kW | Volumetric capacity %8.2f kJ/m³ \n')%(((h2-h1)*self.mdot),(SI_TO('P',self.Q0)/(v1*self.mdot*1000)))
self.statetext+=_(' | COP %8.2f \n')%(SI_TO('P',self.Q0)/((h2-h1)*self.mdot))
#
self.Text_1.delete(1.0, END)
self.Text_1.insert(END, self.statetext)
self.out_nb.select(1)
def Update(self):
#
pass
class _Testdialog:
def __init__(self, master):
frame = Frame(master)
frame.pack()
self.Caller = master
self.x, self.y, self.w, self.h = -1,-1,-1,-1
#
self.ref='R134a'
#
App=cpg_cycle1(frame,self,Debug=True)
def get_ref(self):
return 'R134a'
def get_language(self):
return 'de'
def main():
root = Tk()
app = _Testdialog(root)
root.mainloop()
if __name__ == '__main__':
main()