def test_compressor_missing_char_parameter():
"""Compressor with invalid parameter for eta_s_char function."""
nw = network(['CH4'])
so = basics.source('source')
si = basics.sink('sink')
instance = turbomachinery.compressor('compressor')
c1 = connection(so, 'out1', instance, 'in1')
c2 = connection(instance, 'out1', si, 'in1')
nw.add_conns(c1, c2)
instance.set_attr(eta_s_char=dc_cc(
func=char_line([0, 1], [1, 2]), is_set=True, param=None))
nw.solve('design', init_only=True)
with raises(ValueError):
instance.eta_s_char_func()
def setup_combustion_chamber_model(self):
"""Set up the model using the combustion chamber."""
# %% network setup
fluid_list = ['Ar', 'N2', 'O2', 'CO2', 'CH4', 'H2O']
self.nw1 = network(
fluids=fluid_list, p_unit='bar', T_unit='C',
p_range=[0.5, 20], T_range=[10, 2000])
# %% components
amb = source('ambient')
sf = source('fuel')
cc = combustion_chamber('combustion')
cp = compressor('compressor')
gt = turbine('turbine')
fg = sink('flue gas outlet')
# %% connections
amb_cp = connection(amb, 'out1', cp, 'in1')
cp_cc = connection(cp, 'out1', cc, 'in1')
sf_cc = connection(sf, 'out1', cc, 'in2')
cc_gt = connection(cc, 'out1', gt, 'in1', label='flue gas after cc')
gt_fg = connection(gt, 'out1', fg, 'in1', label='flue gas after gt')
self.nw1.add_conns(amb_cp, cp_cc, sf_cc, cc_gt, gt_fg)
# %% component parameters
cc.set_attr(lamb=3)
cp.set_attr(eta_s=0.9, pr=15)
gt.set_attr(eta_s=0.9)
# %% connection parameters
amb_cp.set_attr(
T=20, p=1, m=100,
fluid={'Ar': 0.0129, 'N2': 0.7553, 'H2O': 0, 'CH4': 0,
'CO2': 0.0004, 'O2': 0.2314})
sf_cc.set_attr(
T=20, fluid={'CO2': 0.04, 'Ar': 0, 'N2': 0,
'O2': 0, 'H2O': 0, 'CH4': 0.96})
gt_fg.set_attr(p=1)
# %% solving
mode = 'design'
self.nw1.solve(mode=mode)
def test_network_reader_deleted_chars(self):
"""Test import of network with missing characteristics."""
self.setup_network_tests()
comp = turbomachinery.compressor('compressor')
a = connection(self.source, 'out1', comp, 'in1')
b = connection(comp, 'out1', self.sink, 'in1')
self.nw.add_conns(a, b)
self.nw.solve('design', init_only=True)
self.nw.save('tmp')
# # remove char_line and char_map folders
os.unlink('tmp/components/char_line.csv')
os.unlink('tmp/components/char_map.csv')
# import network with missing files
imported_nwk = load_network('tmp')
imported_nwk.solve('design', init_only=True)
msg = ('If the network import was successful the network check '
'should have been successful, too, but it is not.')
assert imported_nwk.checked is True, msg
shutil.rmtree('./tmp', ignore_errors=True)
def test_compressor(self):
"""Test component properties of compressors."""
instance = compressor('compressor')
self.setup_network(instance)
# compress NH3, other fluids in network are for turbine, pump, ...
fl = {'N2': 0, 'O2': 0, 'Ar': 0, 'INCOMP::DowQ': 0, 'NH3': 1}
self.c1.set_attr(fluid=fl, v=1, p=5, T=100)
self.c2.set_attr(p=7)
instance.set_attr(eta_s=0.8)
self.nw.solve('design')
self.nw.save('tmp')
# test isentropic efficiency value
eta_s_d = ((instance.h_os('') - self.c1.h.val_SI) /
(self.c2.h.val_SI - self.c1.h.val_SI))
msg = ('Value of isentropic efficiency must be ' + str(eta_s_d) +
', is ' + str(instance.eta_s.val) + '.')
eq_(round(eta_s_d, 3), round(instance.eta_s.val, 3), msg)
# trigger invalid value for isentropic efficiency
instance.set_attr(eta_s=1.1)
self.nw.solve('design')
# test calculated value
eta_s = ((instance.h_os('') - self.c1.h.val_SI) /
(self.c2.h.val_SI - self.c1.h.val_SI))
msg = ('Value of isentropic efficiency must be ' + str(eta_s) +
', is ' + str(instance.eta_s.val) + '.')
eq_(round(eta_s, 3), round(instance.eta_s.val, 3), msg)
# remove pressure at outlet, use characteristic map for pressure
# rise calculation
self.c2.set_attr(p=np.nan)
instance.set_attr(char_map=dc_cm(func=ldc('compressor', 'char_map',
'DEFAULT', compressor_map),
is_set=True),
eta_s=np.nan)
# offdesign test, efficiency value should be at design value
self.nw.solve('offdesign', design_path='tmp')
msg = ('Value of isentropic efficiency (' + str(instance.eta_s.val) +
') must be identical to design case (' + str(eta_s) + ').')
eq_(round(eta_s_d, 2), round(instance.eta_s.val, 2), msg)
# move to highest available speedline, mass flow below lowest value
# at that line
self.c1.set_attr(v=np.nan, m=self.c1.m.val * 0.8, T=30)
self.nw.solve('offdesign', design_path='tmp')
# should be value
eta_s = eta_s_d * instance.char_map.func.z2[6, 0]
msg = ('Value of isentropic efficiency (' + str(instance.eta_s.val) +
') must be at (' + str(round(eta_s, 4)) + ').')
eq_(round(eta_s, 4), round(instance.eta_s.val, 4), msg)
# going below lowest available speedline, above highest mass flow at
# that line
self.c1.set_attr(T=300)
self.nw.solve('offdesign', design_path='tmp', init_path='tmp')
# should be value
eta_s = eta_s_d * instance.char_map.func.z2[0, 9]
msg = ('Value of isentropic efficiency (' + str(instance.eta_s.val) +
') must be at (' + str(round(eta_s, 4)) + ').')
eq_(round(eta_s, 4), round(instance.eta_s.val, 4), msg)
# back to design properties, test eta_s_char
self.c2.set_attr(p=7)
self.c1.set_attr(v=1, T=100, m=np.nan)
# test parameter specification for eta_s_char with unset char map
instance.set_attr(eta_s_char=dc_cc(func=ldc('compressor', 'eta_s_char',
'DEFAULT', char_line),
is_set=True,
param='m'))
instance.char_map.is_set = False
self.nw.solve('offdesign', design_path='tmp')
msg = ('Value of isentropic efficiency must be ' + str(eta_s_d) +
', is ' + str(instance.eta_s.val) + '.')
eq_(round(eta_s_d, 3), round(instance.eta_s.val, 3), msg)
# move up in volumetric flow
self.c1.set_attr(v=1.5)
self.nw.solve('offdesign', design_path='tmp')
eta_s = round(
eta_s_d * instance.eta_s_char.func.evaluate(
self.c1.m.val_SI / self.c1.m.design), 3)
msg = ('Value of isentropic efficiency must be ' + str(eta_s) +
', is ' + str(round(instance.eta_s.val, 3)) + '.')
eq_(eta_s, round(instance.eta_s.val, 3), msg)
# test parameter specification for pr
instance.eta_s_char.set_attr(param='pr')
self.c1.set_attr(v=1)
self.c2.set_attr(p=7.5)
self.nw.solve('offdesign', design_path='tmp')
expr = (self.c2.p.val_SI * self.c1.p.design /
(self.c2.p.design * self.c1.p.val_SI))
eta_s = round(eta_s_d * instance.eta_s_char.func.evaluate(expr), 3)
msg = ('Value of isentropic efficiency must be ' + str(eta_s) +
', is ' + str(round(instance.eta_s.val, 3)) + '.')
eq_(eta_s, round(instance.eta_s.val, 3), msg)
shutil.rmtree('./tmp', ignore_errors=True)
def setup(self):
# %% network
self.nw = network(fluids=['water', 'NH3'],
T_unit='C',
p_unit='bar',
h_unit='kJ / kg',
m_unit='kg / s')
# %% components
# sources & sinks
c_in = source('coolant in')
cb = source('consumer back flow')
cf = sink('consumer feed flow')
amb_in = source('source ambient')
amb_out = sink('sink ambient')
ic_in = source('source intercool')
ic_out = sink('sink intercool')
c_out = sink('coolant out')
# consumer system
cd = heat_exchanger('condenser')
rp = pump('recirculation pump')
cons = heat_exchanger_simple('consumer')
# evaporator system
va = valve('valve')
dr = drum('drum')
ev = heat_exchanger('evaporator')
su = heat_exchanger('superheater')
pu = pump('pump evaporator')
# compressor-system
cp1 = compressor('compressor 1')
cp2 = compressor('compressor 2')
he = heat_exchanger('intercooler')
# busses
self.power = bus('total compressor power')
self.power.add_comps({'c': cp1}, {'c': cp2})
self.heat = 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 = connection(c_in, 'out1', cd, 'in1')
cb_rp = connection(cb, 'out1', rp, 'in1')
rp_cd = connection(rp, 'out1', cd, 'in2')
self.cd_cons = connection(cd, 'out2', cons, 'in1')
cons_cf = 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 = connection(cd, 'out1', va, 'in1')
self.nw.add_conns(cd_va)
# evaporator system
va_dr = connection(va, 'out1', dr, 'in1')
dr_pu = connection(dr, 'out1', pu, 'in1')
pu_ev = connection(pu, 'out1', ev, 'in2')
ev_dr = connection(ev, 'out2', dr, 'in2')
dr_su = connection(dr, 'out2', su, 'in2')
self.nw.add_conns(va_dr, dr_pu, pu_ev, ev_dr, dr_su)
self.amb_in_su = connection(amb_in, 'out1', su, 'in1')
su_ev = connection(su, 'out1', ev, 'in1')
ev_amb_out = 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 = connection(su, 'out2', cp1, 'in1')
self.nw.add_conns(su_cp1)
# compressor-system
cp1_he = connection(cp1, 'out1', he, 'in1')
he_cp2 = connection(he, 'out1', cp2, 'in1')
cp2_c_out = connection(cp2, 'out1', c_out, 'in1')
ic_in_he = connection(ic_in, 'out1', he, 'in2')
he_ic_out = 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
x = np.array([
0, 0.0625, 0.125, 0.1875, 0.25, 0.3125, 0.375, 0.4375, 0.5, 0.5625,
0.6375, 0.7125, 0.7875, 0.9, 0.9875, 1, 1.0625, 1.125, 1.175,
1.2125, 1.2375, 1.25
])
y = np.array([
0.0076, 0.1390, 0.2731, 0.4003, 0.5185, 0.6263, 0.7224, 0.8056,
0.8754, 0.9312, 0.9729, 1.0006, 1.0203, 1.0158, 1.0051, 1.0000,
0.9746, 0.9289, 0.8832, 0.8376, 0.7843, 0.7614
])
rp.set_attr(eta_s=0.8,
design=['eta_s'],
offdesign=['eta_s_char'],
eta_s_char=dc_cc(func=char_line(x, y), param='m'))
cons.set_attr(pr=1, design=['pr'], offdesign=['zeta'])
# evaporator system
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
])
kA_char1 = dc_cc(func=char_line(x, y), param='m')
x = np.array([
0.0100, 0.0400, 0.0700, 0.1100, 0.1500, 0.2000, 0.2500, 0.3000,
0.3500, 0.4000, 0.4500, 0.5000, 0.5500, 0.6000, 0.6500, 0.7000,
0.7500, 0.8000, 0.8500, 0.9000, 0.9500, 1.0000, 1.5000, 2.0000
])
y = np.array([
0.0185, 0.0751, 0.1336, 0.2147, 0.2997, 0.4118, 0.5310, 0.6582,
0.7942, 0.9400, 0.9883, 0.9913, 0.9936, 0.9953, 0.9966, 0.9975,
0.9983, 0.9988, 0.9992, 0.9996, 0.9998, 1.0000, 1.0008, 1.0014
])
kA_char2 = dc_cc(func=char_line(x, y), param='m')
ev.set_attr(pr1=1,
pr2=.999,
ttd_l=5,
design=['ttd_l'],
offdesign=['kA'],
kA_char1=kA_char1,
kA_char2=kA_char2)
# no kA modification for hot side!
x = np.array([0, 1])
y = np.array([1, 1])
kA_char1 = dc_cc(func=char_line(x, y), param='m')
# 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])
kA_char2 = dc_cc(func=char_line(x, y), param='m')
su.set_attr(kA_char1=kA_char1,
kA_char2=kA_char2,
offdesign=['zeta1', 'zeta2', 'kA'])
x = np.array([
0, 0.0625, 0.125, 0.1875, 0.25, 0.3125, 0.375, 0.4375, 0.5, 0.5625,
0.6375, 0.7125, 0.7875, 0.9, 0.9875, 1, 1.0625, 1.125, 1.175,
1.2125, 1.2375, 1.25
])
y = np.array([
0.0076, 0.1390, 0.2731, 0.4003, 0.5185, 0.6263, 0.7224, 0.8056,
0.8754, 0.9312, 0.9729, 1.0006, 1.0203, 1.0158, 1.0051, 1.0000,
0.9746, 0.9289, 0.8832, 0.8376, 0.7843, 0.7614
])
pu.set_attr(eta_s=0.8,
design=['eta_s'],
offdesign=['eta_s_char'],
eta_s_char=dc_cc(func=char_line(x, y), param='m'))
# compressor system
x = np.array([0, 0.4, 1, 1.2])
y = np.array([0.5, 0.9, 1, 1.1])
cp1.set_attr(eta_s=0.8,
design=['eta_s'],
offdesign=['eta_s_char'],
eta_s_char=dc_cc(func=char_line(x, y), param='m'))
cp2.set_attr(eta_s=0.8,
design=['eta_s'],
offdesign=['eta_s_char'],
eta_s_char=dc_cc(func=char_line(x, y), param='m'))
# characteristic line for intercooler kA
x = np.linspace(0, 2.5, 26)
y = np.array([
0.0000, 0.2455, 0.3747, 0.4798, 0.5718, 0.6552, 0.7323, 0.8045,
0.8727, 0.9378, 1.0000, 1.0599, 1.1176, 1.1736, 1.2278, 1.2806,
1.3320, 1.3822, 1.4313, 1.4792, 1.5263, 1.5724, 1.6176, 1.6621,
1.7058, 1.7488
])
# x = np.array([0, 1])
# y = np.array([1, 1])
kA_char1 = dc_cc(func=char_line(x, y), param='m')
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
])
# x = np.array([0, 1])
# y = np.array([1, 1])
kA_char2 = dc_cc(func=char_line(x, y), param='m')
he.set_attr(kA_char1=kA_char1,
kA_char2=kA_char2,
offdesign=['zeta1', 'zeta2', 'kA'])
# characteristic line for condenser kA
x = np.linspace(0, 2.5, 26)
y = np.array([
0.0000, 0.2455, 0.3747, 0.4798, 0.5718, 0.6552, 0.7323, 0.8045,
0.8727, 0.9378, 1.0000, 1.0599, 1.1176, 1.1736, 1.2278, 1.2806,
1.3320, 1.3822, 1.4313, 1.4792, 1.5263, 1.5724, 1.6176, 1.6621,
1.7058, 1.7488
])
kA_char1 = dc_cc(func=char_line(x, y), param='m')
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
])
kA_char2 = dc_cc(func=char_line(x, y), param='m')
cd.set_attr(kA_char1=kA_char1,
kA_char2=kA_char2,
pr2=0.9998,
design=['pr2'],
offdesign=['zeta2', 'kA'])
# %% connection parametrization
# condenser system
c_in_cd.set_attr(fluid={'water': 0, 'NH3': 1}, p=60)
rp_cd.set_attr(T=60, fluid={'water': 1, 'NH3': 0}, p=10)
self.cd_cons.set_attr(T=105)
cons_cf.set_attr(h=ref(cb_rp, 1, 0), p=ref(cb_rp, 1, 0))
cd_va.set_attr(p=ref(c_in_cd, 1, -1000),
Td_bp=-5,
h0=500,
design=['Td_bp'])
# evaporator system cold side
pu_ev.set_attr(m=ref(va_dr, 10, 0), p0=5)
dr_su.set_attr(p0=5, T=5)
su_cp1.set_attr(p=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=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=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=ref(ic_in_he, 1, -200), design=['p'])
cp2_c_out.set_attr(p=ref(c_in_cd, 1, 0), h=ref(c_in_cd, 1, 0))
def setup(self):
"""Set up the model."""
# %% network setup
fluid_list = ['Ar', 'N2', 'O2', 'CO2', 'CH4', 'H2O']
self.nw = network(fluids=fluid_list,
p_unit='bar',
T_unit='C',
p_range=[0.5, 20],
T_range=[10, 2000])
# %% components
amb = source('ambient')
sf = source('fuel')
cc = combustion_chamber('combustion')
cp = compressor('compressor')
gt = turbine('turbine')
fg = sink('flue gas outlet')
# %% connections
amb_cp = connection(amb, 'out1', cp, 'in1', label='ambient air flow')
cp_cc = connection(cp, 'out1', cc, 'in1')
sf_cc = connection(sf, 'out1', cc, 'in2')
cc_gt = connection(cc, 'out1', gt, 'in1')
gt_fg = connection(gt, 'out1', fg, 'in1')
self.nw.add_conns(amb_cp, cp_cc, sf_cc, cc_gt, gt_fg)
# %% component parameters
cc.set_attr(lamb=3)
cp.set_attr(eta_s=0.9, pr=15)
gt.set_attr(eta_s=0.9)
# %% connection parameters
amb_cp.set_attr(T=20,
p=1,
m=100,
fluid={
'Ar': 0.0129,
'N2': 0.7553,
'H2O': 0,
'CH4': 0,
'CO2': 0.0004,
'O2': 0.2314
})
sf_cc.set_attr(T=20,
fluid={
'CO2': 0.04,
'Ar': 0,
'N2': 0,
'O2': 0,
'H2O': 0,
'CH4': 0.96
})
gt_fg.set_attr(p=1)
# motor efficiency
x = np.array([
0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55,
0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15,
1.2, 10
])
y = np.array([
0.01, 0.3148, 0.5346, 0.6843, 0.7835, 0.8477, 0.8885, 0.9145,
0.9318, 0.9443, 0.9546, 0.9638, 0.9724, 0.9806, 0.9878, 0.9938,
0.9982, 0.999, 0.9995, 0.9999, 1, 0.9977, 0.9947, 0.9909, 0.9853,
0.9644
]) * 0.975
self.motor_bus_based = char_line(x=x, y=y)
self.motor_comp_based = char_line(x=x, y=1 / y)
# generator efficiency
x = np.array([
0.100, 0.345, 0.359, 0.383, 0.410, 0.432, 0.451, 0.504, 0.541,
0.600, 0.684, 0.805, 1.000, 1.700, 10
])
y = np.array([
0.976, 0.989, 0.990, 0.991, 0.992, 0.993, 0.994, 0.995, 0.996,
0.997, 0.998, 0.999, 1.000, 0.999, 0.99
]) * 0.975
self.generator = char_line(x=x, y=y)
power_bus_total = bus('total power output')
power_bus_total.add_comps(
{
'comp': cp,
'char': self.motor_bus_based,
'base': 'bus'
}, {
'comp': gt,
'char': self.generator
})
thermal_input = bus('thermal input')
thermal_input.add_comps({'comp': cc})
compressor_power_comp = bus('compressor power input')
compressor_power_comp.add_comps({
'comp': cp,
'char': self.motor_comp_based
})
compressor_power_bus = bus('compressor power input bus based')
compressor_power_bus.add_comps({
'comp': cp,
'char': self.motor_bus_based,
'base': 'bus'
})
self.nw.add_busses(power_bus_total, thermal_input,
compressor_power_comp, compressor_power_bus)
# %% solving
self.nw.solve('design')
self.nw.save('tmp')
Q_N = abs(float(input('Gib die Nennwaermeleistung in MW ein: '))) * -1e6
# %% network
fluid_list = ['Ar', 'N2', 'O2', 'CO2', 'CH4', 'H2O']
nw = 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 = compressor('compressor')
comp_fuel = compressor('fuel compressor')
c_c = combustion_chamber('combustion')
g_turb = turbine('gas turbine')
CH4 = source('fuel source')
air = source('ambient air')
# waste heat recovery
suph = heat_exchanger('superheater')
evap = heat_exchanger('evaporator')
drum = drum('drum')
eco = heat_exchanger('economizer')
ch = sink('chimney')
# steam turbine part