def test_condenser(self):
"""
Test component properties of condenser.
"""
tesin = cmp.sink('TES in')
tesout = cmp.source('TES out')
hsin = cmp.sink('Cond in')
hsout = cmp.source('Cond out')
he = cmp.condenser('condenser')
tes_he = con.connection(tesout, 'out1', he, 'in2')
he_tes = con.connection(he, 'out2', tesin, 'in1')
hs_he = con.connection(hsout, 'out1', he, 'in1')
he_hs = con.connection(he, 'out1', hsin, 'in1')
self.nw.add_conns(tes_he, he_tes, hs_he, he_hs)
# design specification
he.set_attr(pr1=0.98, pr2=0.98, ttd_u=5, design=['pr2', 'ttd_u', 'ttd_l'], offdesign=['zeta2', 'kA'])
hs_he.set_attr(T=100, p0=0.5, fluid={'N2': 0, 'O2': 0, 'Ar': 0, 'INCOMP::DowQ': 0, 'H2O': 1, 'NH3': 0, 'CO2': 0, 'CH4': 0})
tes_he.set_attr(T=30, p=5, fluid={'N2': 0, 'O2': 0, 'Ar': 0, 'INCOMP::DowQ': 0, 'H2O': 1, 'NH3': 0, 'CO2': 0, 'CH4': 0})
he_tes.set_attr(T=40)
he.set_attr(Q=-80e3)
self.nw.solve('design')
# check heat flow
Q = hs_he.m.val_SI * (he_hs.h.val_SI - hs_he.h.val_SI)
self.nw.save('tmp')
ttd_u = hlp.T_mix_ph([0, hs_he.p.val_SI, hlp.h_mix_pQ(hs_he.to_flow(), 1), hs_he.fluid.val]) - he_tes.T.val_SI
p = hs_he.p.val_SI
eq_(round(ttd_u, 1), round(he.ttd_u.val, 1), 'Value of terminal temperature difference must be ' + str(he.ttd_u.val) + ', is ' + str(ttd_u) + '.')
# check lower terminal temperature difference
he.set_attr(ttd_l=20, ttd_u=np.nan)
self.nw.solve('design')
eq_(round(he_hs.T.val - tes_he.T.val, 1), round(he.ttd_l.val, 1), 'Value of terminal temperature difference must be ' + str(he.ttd_l.val) + ', is ' + str(he_hs.T.val - tes_he.T.val) + '.')
# check kA value
self.nw.solve('offdesign', design_path='tmp')
eq_(round(p, 1), round(hs_he.p.val_SI, 1), 'Value of condensing pressure be ' + str(p) + ', is ' + str(hs_he.p.val_SI) + '.')
shutil.rmtree('./tmp', ignore_errors=True)
# %% 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')
cp1 = cmp.sink('compressor 1')
# consumer system
cd = cmp.condenser('condenser')
rp = cmp.pump('recirculation pump')
cons = cmp.heat_exchanger_simple('consumer')
# evaporator system
ves = cmp.vessel('vessel')
dr = cmp.drum('drum')
ev = cmp.heat_exchanger('evaporator')
su = cmp.heat_exchanger('superheater')
pu = cmp.pump('pump evaporator')
# %% connections
# consumer system
# %% network fluids = ['water'] nw = nwk.network(fluids=fluids, p_unit='bar', T_unit='C', h_unit='kJ / kg') # %% components # turbine part valve_turb = cmp.valve(label='valve_turb') turbine_hp = cmp.turbine(label='turbine_hp') split = cmp.splitter(label='splitter1') turbine_lp = cmp.turbine(label='turbine_lp') # condenser and preheater condenser = cmp.condenser(label='condenser') preheater = cmp.condenser(label='preheater') valve_pre = cmp.valve(label='valve_pre') valve = cmp.valve(label='valve1') merge = cmp.merge(label='merge1') # feed water pump = cmp.pump(label='pump') steam_generator = cmp.heat_exchanger_simple(label='steam generator') # sources and sinks source = cmp.source(label='source') sink = cmp.sink(label='sink') # for cooling water source_cw = cmp.source(label='source_cw')
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
turb_hp = cmp.turbine('steam turbine high pressure')
cond_dh = cmp.condenser('district heating condenser')
mp_split = cmp.splitter('mp split')
turb_lp = cmp.turbine('steam turbine low pressure')
cond = cmp.condenser('condenser')
merge = cmp.merge('merge')
pump1 = cmp.pump('feed water pump 1')
pump2 = cmp.pump('feed water pump 2')
ls_out = cmp.sink('ls sink')
ls_in = cmp.source('ls source')
mp_valve = cmp.valve('mp valve')
# district heating
dh_in = cmp.source('district heating backflow')
dh_out = cmp.sink('district heating feedflow')
# cooling water
