def Update(self):
'''
Update cycle class with selected HX type
Update cycle class with Abstract State
'''
if self.EvapSolver == 'Moving-Boundary':
if self.EvapType == 'Fin-tube':
self.Evaporator = EvaporatorClass()
self.Evaporator.Fins = FinInputs()
elif self.EvapType == 'Micro-channel':
raise
else:
raise
elif self.EvapSolver == 'Finite-Element':
raise
else:
raise
if self.CondSolver == 'Moving-Boundary':
if self.CondType == 'Fin-tube':
self.Condenser = CondenserClass()
self.Condenser.Fins = FinInputs()
elif self.CondType == 'Micro-channel':
self.Condenser = MicroCondenserClass()
self.Condenser.Fins = MicroFinInputs()
else:
raise
elif self.CondSolver == 'Finite-Element':
raise
else:
raise
#Abstract State
self.AS = CP.AbstractState(self.Backend, self.Ref)
def Update(self):
'''
Update cycle class with selected HX type
Update cyle class with Abstract State
'''
if self.EvapSolver == 'Moving-Boundary':
if self.EvapType == 'Fin-tube':
self.Evaporator = EvaporatorClass()
self.Evaporator.Fins = FinInputs()
elif self.EvapType == 'Micro-channel':
self.Evaporator = MicroChannelEvaporatorClass()
self.Evaporator.Fins = MicroFinInputs()
else:
raise
elif self.EvapSolver == 'Finite-Element':
self.Evaporator = DiscretizeEvaporatorClass()
else:
raise
if self.CondSolver == 'Moving-Boundary':
if self.CondType == 'Fin-tube':
self.Condenser = CondenserClass()
self.Condenser.Fins = FinInputs()
elif self.CondType == 'Micro-channel':
self.Condenser = MicroCondenserClass()
self.Condenser.Fins = MicroFinInputs()
else:
raise
elif self.CondSolver == 'Finite-Element':
self.Condenser = DiscretizeCondenserClass()
else:
raise
#Abstract State
self.AS = CP.AbstractState(self.Backend, self.Ref)
if hasattr(self, 'MassFrac'):
self.AS.set_mass_fractions([self.MassFrac])
elif hasattr(self, 'VoluFrac'):
self.AS.set_volu_fractions([self.VoluFrac])
#Abstract State for SecLoopFluid
self.AS_SLF = CP.AbstractState(self.Backend_SLF, self.SecLoopFluid)
if hasattr(self, 'MassFrac_SLF'):
self.AS_SLF.set_mass_fractions([self.MassFrac_SLF])
elif hasattr(self, 'VoluFrac_SLF'):
self.AS_SLF.set_volu_fractions([self.VoluFrac_SLF])
def SampleMicroChannelGasCooler():
Fins = MicroFinInputs()
Fins.Tubes.NTubes = 61.354 #Number of tubes (per bank for now!)
Fins.Tubes.Nbank = 1 #Number of banks (set to 1 for now!)
Fins.Tubes.Npass = 3 #Number of passes (per bank-averaged)
Fins.Tubes.Nports = 1 #Number of rectangular ports
Fins.Tubes.Ltube = 0.30213 #length of a single tube
Fins.Tubes.Td = 0.0333 #Tube outside width (depth)
Fins.Tubes.Ht = 0.002 #Tube outside height (major diameter)
Fins.Tubes.b = 0.00635 #Tube spacing
Fins.Tubes.tw = 0.0003 #Tube wall thickness
Fins.Tubes.twp = 0.0003 #Port (channel) wall thickness
Fins.Tubes.beta = 1 #Port (channel) aspect ratio (=width/height)
Fins.Tubes.kw = 117 #wall thermal conductivity
Fins.Fins.FPI = 11.0998 #Fin per inch
Fins.Fins.Lf = 0.0333 #Fin length
Fins.Fins.t = 0.000152 #Fin thickness
Fins.Fins.k_fin = 117 #Fin thermal conductivity
Fins.Air.Vdot_ha = 0.281 #rated volumetric flowrate (m^3/s)
Fins.Air.Tmean = 29.4 + 273.15
Fins.Air.Tdb = 29.4 + 273.15 #Dry Bulb Temperature
Fins.Air.p = 101325 #Air pressure in Pa
Fins.Air.RH = 0.5 #Relative Humidity
Fins.Air.RHmean = 0.5
Fins.Air.FanPower = 160
Fins.Louvers.Lalpha = 20 #Louver angle, in degree
Fins.Louvers.lp = 0.001 #Louver pitch
Fins.Louvers.Llouv = 0.005737 #Louver cut length
#Abstract State
Ref = 'R744'
Backend = 'HEOS' #choose between: 'HEOS','TTSE&HEOS','BICUBIC&HEOS','REFPROP','SRK','PR'
AS = CP.AbstractState(Backend, Ref)
params = {
'AS': AS,
'mdot_r': 0.076,
'Tin_r': 110.6 + 273.15,
'psat_r': 11000000,
'Fins': Fins,
'FinsType': 'MultiLouveredMicroFins',
'Verbosity': 0,
'h_a_tuning': 1,
'h_r_tuning': 1,
'DP_tuning': 1,
}
GasCool = MicroChannelGasCoolerClass(**params)
GasCool.Calculate()
return GasCool
def SampleMicroCondenser(AS, T=95):
Fins = MicroFinInputs()
Fins.Tubes.NTubes = 61.354 #Number of tubes (per bank for now!)
Fins.Tubes.Nbank = 1 #Number of banks (set to 1 for now!)
Fins.Tubes.Npass = 3 #Number of passes (per bank-averaged)
Fins.Tubes.Nports = 1 #Number of rectangular ports
Fins.Tubes.Ltube = 0.30213 #length of a single tube
Fins.Tubes.Td = 0.0333 #Tube outside width (depth)
Fins.Tubes.Ht = 0.002 #Tube outside height (major diameter)
Fins.Tubes.b = 0.00635 #Tube spacing
Fins.Tubes.tw = 0.0003 #Tube wall thickness
Fins.Tubes.twp = 0.0003 #Port (channel) wall thickness
Fins.Tubes.beta = 1 #Port (channel) aspect ratio (=width/height)
Fins.Tubes.kw = 117 #wall thermal conductivity
Fins.Fins.FPI = 11.0998 #Fin per inch
Fins.Fins.Lf = 0.0333 #Fin length
Fins.Fins.t = 0.000152 #Fin thickness
Fins.Fins.k_fin = 117 #Fin thermal conductivity
Fins.Air.Vdot_ha = 1.05 #Air volume flow rate in m^3/s
Fins.Air.Tmean = 298
Fins.Air.Tdb = 298 #Air inlet temperature, K
Fins.Air.p = 100000 #Air pressure in Pa
Fins.Air.RHmean = 0.5
Fins.Air.RH = 0.5 #Air inlet relative humidity
Fins.Air.FanPower = 854.9 #Fan power, Watts
Fins.Louvers.Lalpha = 20 #Louver angle, in degree
Fins.Louvers.lp = 0.001 #Louver pitch
Fins.Louvers.Llouv = 0.005737 #Louver cut length
params = {
'AS': AS,
'mdot_r': 0.0683,
'Tin_r': T + 273.15,
'psat_r': 3500000,
'Fins': Fins,
'FinsType': 'MultiLouveredMicroFins',
'Verbosity': 0,
'h_a_tuning': 1,
'h_tp_tuning': 1,
'DP_tuning': 1
}
MicroCond = MicroCondenserClass(**params)
MicroCond.Calculate()
return MicroCond
from __future__ import division, print_function, absolute_import import CoolProp as CP from CoolProp.CoolProp import PropsSI from ACHP.MicroChannelCondenser import MicroCondenserClass from ACHP.MicroFinCorrelations import MicroFinInputs from ACHP.convert_units import in2m, mm2m, cfm2cms, F2K, kPa2Pa, C2K Fins = MicroFinInputs() Fins.Tubes.NTubes = 30 #Number of tubes (per bank for now!) Fins.Tubes.Nbank = 2 #Number of banks (set to 1 for now!) Fins.Tubes.Npass = 2 #Number of passes (per bank) #averaged if not even Fins.Tubes.Nports = 11 #Number of rectangular ports Fins.Tubes.Ltube = in2m(18.24) #length of a single tube Fins.Tubes.Td = in2m(1) #Tube outside width (depth) Fins.Tubes.Ht = in2m(0.072) #Tube outside height (major diameter) Fins.Tubes.b = in2m(0.488) #Tube spacing Fins.Tubes.tw = in2m(0.015) #Tube wall thickness Fins.Tubes.twp = in2m(0.016) #Port (channel) wall thickness Fins.Tubes.beta = 1.7675 #Port (channel) aspect ratio (=width/height) Fins.Tubes.kw = 237 #Wall thermal conductivity Fins.Fins.FPI = 13 #Fin per inch Fins.Fins.Lf = in2m(1) #Fin length = tube outside width in this HX Fins.Fins.t = in2m(0.0045) ##measured## #Fin thickness Fins.Fins.k_fin = 117 #Fin thermal conductivity for pure Aluminum Fins.Air.Vdot_ha = cfm2cms(1500) #Air volume flow rate in m^3/s Fins.Air.Tdb = F2K(125) #Air inlet temperature, K Fins.Air.p = 101325 #Air inlet pressure in Pa Fins.Air.RH = 0.199 #Air inlet relative humidity Fins.Air.FanPower = 855 #Fan power, Watts
if __name__=='__main__':
#Example usage for a parametric study
from CoolProp.CoolProp import PropsSI
import pylab
num_points= 101
T_dews= np.linspace(265,292,num_points)
TT= np.empty(num_points)
Q_2p= np.empty(num_points)
w_2p= np.empty(num_points)
w_sh= np.empty(num_points)
Q_tot= np.empty(num_points)
h_2p= np.empty(num_points)
h_sh= np.empty(num_points)
FinsTubes=MicroFinInputs()
FinsTubes.Tubes.NTubes=61.354 #Number of tubes (per bank for now!)
FinsTubes.Tubes.Nbank=1 #Number of banks (set to 1 for now!)
FinsTubes.Tubes.Npass=3 #Number of passes (per bank-averaged)
FinsTubes.Tubes.Nports=1 #Number of rectangular ports
FinsTubes.Tubes.Ltube=0.30213 #length of a single tube
FinsTubes.Tubes.Td=0.0333 #Tube outside width (depth)
FinsTubes.Tubes.Ht= 0.002 #Tube outside height (major diameter)
FinsTubes.Tubes.b=0.00635 #Tube spacing
FinsTubes.Tubes.tw=0.0003 #Tube wall thickness
FinsTubes.Tubes.twp=0.0003 #Port (channel) wall thickness
FinsTubes.Tubes.beta=1 #Port (channel) aspect ratio (=width/height)
FinsTubes.Tubes.kw=117 #wall thermal conductivity
FinsTubes.Fins.FPI=11.0998 #Fin per inch