def test_compressor(self):
"""
Test component properties of compressors.
"""
instance = cmp.compressor('compressor')
c1, c2 = self.setup_network_11(instance)
fl = {'N2': 0, 'O2': 0, 'Ar': 0, 'INCOMP::DowQ': 0, 'H2O': 0, 'NH3': 1, 'CO2': 0, 'CH4': 0}
c1.set_attr(fluid=fl, v=1, p=5, T=100)
c2.set_attr(p=7)
instance.set_attr(eta_s=0.8)
self.nw.solve('design')
self.nw.save('tmp')
# calculate isentropic efficiency the old fashioned way
eta_s_d = (instance.h_os('') - c1.h.val_SI) / (c2.h.val_SI - c1.h.val_SI)
eq_(round(eta_s_d, 3), round(instance.eta_s.val, 3), 'Value of isentropic efficiency must be ' + str(eta_s_d) + ', is ' + str(instance.eta_s.val) + '.')
# trigger invalid isentropic efficiency
instance.set_attr(eta_s=1.1)
self.nw.solve('design')
# calculate isentropic efficiency the old fashioned way
eta_s = (instance.h_os('') - c1.h.val_SI) / (c2.h.val_SI - c1.h.val_SI)
eq_(round(eta_s, 3), round(instance.eta_s.val, 3), 'Value of isentropic efficiency must be ' + str(eta_s) + ', is ' + str(instance.eta_s.val) + '.')
c2.set_attr(p=np.nan)
instance.set_attr(char_map=hlp.dc_cm(method='GENERIC', is_set=True), eta_s=np.nan)
self.nw.solve('offdesign', design_path='tmp')
eta_s = (instance.h_os('') - c1.h.val_SI) / (c2.h.val_SI - c1.h.val_SI)
eq_(round(eta_s, 2), round(instance.eta_s.val, 2), 'Value of isentropic efficiency (' + str(instance.eta_s.val) + ') must be identical to design case (' + str(eta_s) + ').')
# going above highes available speedline, beneath lowest mass flow at that line
c1.set_attr(v=np.nan, m=c1.m.val*0.8, T=30)
self.nw.solve('offdesign', design_path='tmp')
eq_(round(eta_s * instance.char_map.z2[6, 0], 4), round(instance.eta_s.val, 4), 'Value of isentropic efficiency (' + str(instance.eta_s.val) + ') must be at (' + str(round(eta_s * instance.char_map.z2[6, 0], 4)) + ').')
# going below lowest available speedline, above highest mass flow at that line
c1.set_attr(T=300)
self.nw.solve('offdesign', design_path='tmp')
eq_(round(eta_s * instance.char_map.z2[0, 9], 4), round(instance.eta_s.val, 4), 'Value of isentropic efficiency (' + str(instance.eta_s.val) + ') must be at (' + str(round(eta_s * instance.char_map.z2[0, 9], 4)) + ').')
# back to design properties, test eta_s_char
c2.set_attr(p=7)
c1.set_attr(v=1, T=100, m=np.nan)
# test param specification m
instance.set_attr(eta_s_char=hlp.dc_cc(method='GENERIC', is_set=True, param='m'))
instance.char_map.is_set = False
self.nw.solve('offdesign', design_path='tmp')
eq_(round(eta_s, 3), round(instance.eta_s.val, 3), 'Value of isentropic efficiency must be ' + str(eta_s) + ', is ' + str(instance.eta_s.val) + '.')
c1.set_attr(v=1.5)
self.nw.solve('offdesign', design_path='tmp')
eq_(0.88, round(instance.eta_s.val, 3), 'Value of isentropic efficiency must be ' + str(0.88) + ', is ' + str(instance.eta_s.val) + '.')
# test param specification pr
instance.eta_s_char.set_attr(param='pr')
c1.set_attr(v=1)
c2.set_attr(p=7.5)
self.nw.solve('offdesign', design_path='tmp')
eq_(0.829, round(instance.eta_s.val, 3), 'Value of isentropic efficiency must be ' + str(0.829) + ', is ' + str(instance.eta_s.val) + '.')
instance.eta_s_char.set_attr(param=None)
# test for missing parameter declaration
try:
self.nw.solve('offdesign', design_path='tmp')
except ValueError:
pass
shutil.rmtree('./tmp', ignore_errors=True)
m_unit='kg / s')
# %% components
# sources & sinks
c_in = cmp.source('coolant in')
cb = cmp.source('consumer back flow')
cf = cmp.sink('consumer feed flow')
amb = cmp.source('ambient air')
amb_out1 = cmp.sink('sink ambient 1')
amb_out2 = cmp.sink('sink ambient 2')
c_out = cmp.sink('coolant out')
# ambient air system
sp = cmp.splitter('splitter')
fan = cmp.compressor('fan')
# consumer system
cd = cmp.condenser('condenser')
dhp = cmp.pump('district heating pump')
cons = cmp.heat_exchanger_simple('consumer')
# evaporator system
ves = cmp.valve('valve')
dr = cmp.drum('drum')
ev = cmp.heat_exchanger('evaporator')
su = cmp.heat_exchanger('superheater')
erp = cmp.pump('evaporator reciculation pump')
from tespy import cmp, con, nwk, hlp
# %% network
fluid_list = ['Ar', 'N2', 'O2', 'CO2', 'CH4', 'H2O']
nw = nwk.network(fluids=fluid_list,
p_unit='bar',
T_unit='C',
h_unit='kJ / kg',
p_range=[1, 10],
T_range=[110, 1500],
h_range=[500, 4000])
# %% components
# gas turbine part
comp = cmp.compressor('compressor')
c_c = cmp.combustion_chamber('combustion')
g_turb = cmp.turbine('gas turbine')
CH4 = cmp.source('fuel source')
air = cmp.source('ambient air')
# waste heat recovery
suph = cmp.heat_exchanger('superheater')
evap = cmp.heat_exchanger('evaporator')
drum = cmp.drum('drum')
eco = cmp.heat_exchanger('economizer')
dh_whr = cmp.heat_exchanger('waste heat recovery')
ch = cmp.sink('chimney')
# steam turbine part
def setup(self):
# %% network
self.nw = nwk.network(fluids=['water', 'NH3'],
T_unit='C',
p_unit='bar',
h_unit='kJ / kg',
m_unit='kg / s')
# %% components
# sources & sinks
c_in = cmp.source('coolant in')
cb = cmp.source('consumer back flow')
cf = cmp.sink('consumer feed flow')
amb_in = cmp.source('source ambient')
amb_out = cmp.sink('sink ambient')
ic_in = cmp.source('source intercool')
ic_out = cmp.sink('sink intercool')
c_out = cmp.sink('coolant out')
# consumer system
cd = cmp.heat_exchanger('condenser')
rp = cmp.pump('recirculation pump')
cons = cmp.heat_exchanger_simple('consumer')
# evaporator system
va = cmp.valve('valve')
dr = cmp.drum('drum')
ev = cmp.heat_exchanger('evaporator')
su = cmp.heat_exchanger('superheater')
pu = cmp.pump('pump evaporator')
# compressor-system
cp1 = cmp.compressor('compressor 1')
cp2 = cmp.compressor('compressor 2')
he = cmp.heat_exchanger('intercooler')
# busses
x = np.array([0, 0.7, 1, 1.3])
y = 1 / np.array([0.8, 0.95, 1, 0.98]) / 0.9583794
motor = cmp_char.characteristics(x=x, y=y)
self.power = con.bus('total compressor power')
self.power.add_comps({
'c': cp1,
'char': motor
}, {
'c': cp2,
'char': motor
})
self.heat = con.bus('total delivered heat')
self.heat.add_comps({'c': cd, 'char': -1})
self.nw.add_busses(self.power, self.heat)
# %% connections
# consumer system
c_in_cd = con.connection(c_in, 'out1', cd, 'in1')
cb_rp = con.connection(cb, 'out1', rp, 'in1')
rp_cd = con.connection(rp, 'out1', cd, 'in2')
self.cd_cons = con.connection(cd, 'out2', cons, 'in1')
cons_cf = con.connection(cons, 'out1', cf, 'in1')
self.nw.add_conns(c_in_cd, cb_rp, rp_cd, self.cd_cons, cons_cf)
# connection condenser - evaporator system
cd_va = con.connection(cd, 'out1', va, 'in1')
self.nw.add_conns(cd_va)
# evaporator system
va_dr = con.connection(va, 'out1', dr, 'in1')
dr_pu = con.connection(dr, 'out1', pu, 'in1')
pu_ev = con.connection(pu, 'out1', ev, 'in2')
ev_dr = con.connection(ev, 'out2', dr, 'in2')
dr_su = con.connection(dr, 'out2', su, 'in2')
self.nw.add_conns(va_dr, dr_pu, pu_ev, ev_dr, dr_su)
self.amb_in_su = con.connection(amb_in, 'out1', su, 'in1')
su_ev = con.connection(su, 'out1', ev, 'in1')
ev_amb_out = con.connection(ev, 'out1', amb_out, 'in1')
self.nw.add_conns(self.amb_in_su, su_ev, ev_amb_out)
# connection evaporator system - compressor system
su_cp1 = con.connection(su, 'out2', cp1, 'in1')
self.nw.add_conns(su_cp1)
# compressor-system
cp1_he = con.connection(cp1, 'out1', he, 'in1')
he_cp2 = con.connection(he, 'out1', cp2, 'in1')
cp2_c_out = con.connection(cp2, 'out1', c_out, 'in1')
ic_in_he = con.connection(ic_in, 'out1', he, 'in2')
he_ic_out = con.connection(he, 'out2', ic_out, 'in1')
self.nw.add_conns(cp1_he, he_cp2, ic_in_he, he_ic_out, cp2_c_out)
# %% component parametrization
# condenser system
rp.set_attr(eta_s=0.8, design=['eta_s'], offdesign=['eta_s_char'])
cons.set_attr(pr=1, design=['pr'], offdesign=['zeta'])
# evaporator system
ev.set_attr(pr1=1,
pr2=.999,
ttd_l=5,
design=['ttd_l'],
offdesign=['kA'],
kA_char1='EVA_HOT',
kA_char2='EVA_COLD')
# characteristic line for superheater kA
x = np.array(
[0, 0.045, 0.136, 0.244, 0.43, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2])
y = np.array(
[0, 0.037, 0.112, 0.207, 0.5, 0.8, 0.85, 0.9, 0.95, 1, 1.04, 1.07])
su_char = hlp.dc_cc(x=x, y=y, param='m')
su.set_attr(kA_char1='default',
kA_char2=su_char,
offdesign=['zeta1', 'zeta2', 'kA'])
pu.set_attr(eta_s=0.8, design=['eta_s'], offdesign=['eta_s_char'])
# compressor system
cp1.set_attr(eta_s=0.8, design=['eta_s'], offdesign=['eta_s_char'])
cp2.set_attr(eta_s=0.8, design=['eta_s'], offdesign=['eta_s_char'])
# characteristic line for intercooler kA
x = np.linspace(0, 2.5, 26)
y = np.array([
0.000, 0.164, 0.283, 0.389, 0.488, 0.581, 0.670, 0.756, 0.840,
0.921, 1.000, 1.078, 1.154, 1.228, 1.302, 1.374, 1.446, 1.516,
1.585, 1.654, 1.722, 1.789, 1.855, 1.921, 1.986, 2.051
])
he_char_cold = hlp.dc_cc(x=x, y=y, param='m')
he.set_attr(kA_char1='default',
kA_char2=he_char_cold,
offdesign=['zeta1', 'zeta2', 'kA'])
cd.set_attr(pr2=0.998, design=['pr2'], offdesign=['zeta2', 'kA'])
# %% connection parametrization
# condenser system
c_in_cd.set_attr(fluid={'water': 0, 'NH3': 1}, p=60)
cb_rp.set_attr(T=60, p=10, fluid={'water': 1, 'NH3': 0})
self.cd_cons.set_attr(T=105)
cons_cf.set_attr(h=con.ref(cb_rp, 1, 0), p=con.ref(cb_rp, 1, 0))
cd_va.set_attr(p=con.ref(c_in_cd, 1, -1000),
Td_bp=-5,
h0=500,
design=['Td_bp'])
# evaporator system cold side
pu_ev.set_attr(m=con.ref(va_dr, 10, 0), p0=5)
dr_su.set_attr(p0=5, T=5)
su_cp1.set_attr(p=con.ref(dr_su, 1, -5000),
Td_bp=5,
h0=1700,
design=['Td_bp', 'p'])
# evaporator system hot side
self.amb_in_su.set_attr(m=20, T=12, p=1, fluid={'water': 1, 'NH3': 0})
su_ev.set_attr(p=con.ref(self.amb_in_su, 1, -100), design=['p'])
ev_amb_out.set_attr()
# compressor-system
cp1_he.set_attr(p=15)
he_cp2.set_attr(T=40, p=con.ref(cp1_he, 1, -1000), design=['T', 'p'])
ic_in_he.set_attr(p=1, T=20, m=5, fluid={'water': 1, 'NH3': 0})
he_ic_out.set_attr(p=con.ref(ic_in_he, 1, -200), design=['p'])
cp2_c_out.set_attr(p=con.ref(c_in_cd, 1, 0), h=con.ref(c_in_cd, 1, 0))
@author: witte
"""
from tespy import cmp, con, nwk, hlp, cmp_char, nwkr
import numpy as np
from matplotlib import pyplot as plt
# %% network
fluid_list = ['Ar', 'N2', 'O2', 'CO2', 'CH4', 'H2O']
nw = nwk.network(fluids=fluid_list, p_unit='bar', T_unit='C', h_unit='kJ / kg',
p_range=[1, 100], T_range=[10, 1500], h_range=[10, 4000])
# %% components
# gas turbine part
comp = cmp.compressor('compressor')
comp_fuel = cmp.compressor('fuel compressor')
c_c = cmp.combustion_chamber('combustion')
g_turb = cmp.turbine('gas turbine')
CH4 = cmp.source('fuel source')
air = cmp.source('ambient air')
# waste heat recovery
suph = cmp.heat_exchanger('superheater')
evap = cmp.heat_exchanger('evaporator')
drum = cmp.drum('drum')
eco = cmp.heat_exchanger('economizer')
ch = cmp.sink('chimney')
# steam turbine part
