# ambient air system sp = Splitter('splitter') fan = Compressor('fan') # consumer system cd = Condenser('condenser') dhp = Pump('district heating pump') cons = HeatExchangerSimple('consumer') # evaporator system ves = Valve('valve') dr = Drum('drum') ev = HeatExchanger('evaporator') su = HeatExchanger('superheater') erp = Pump('evaporator reciculation pump') # compressor-system cp1 = Compressor('compressor 1') cp2 = Compressor('compressor 2') ic = HeatExchanger('intercooler') # %% connections # consumer system c_in_cd = Connection(cc, 'out1', cd, 'in1')
# %% network fluid_list = ['Ar', 'N2', 'O2', 'CO2', 'CH4', 'H2O'] nw = Network(fluids=fluid_list, p_unit='bar', T_unit='C', h_unit='kJ / kg') # %% components # gas turbine part comp = Compressor('compressor') c_c = CombustionChamber('combustion') g_turb = Turbine('gas turbine') CH4 = Source('fuel source') air = Source('ambient air') # waste heat recovery suph = HeatExchanger('superheater') evap = HeatExchanger('evaporator') dr = Drum('drum') eco = HeatExchanger('economizer') dh_whr = HeatExchanger('waste heat recovery') ch = Sink('chimney') # steam turbine part turb = Turbine('steam turbine') cond = Condenser('condenser') pu = Pump('feed water pump') cc = CycleCloser('ls cycle closer') # district heating dh_in = Source('district heating backflow') dh_out = Sink('district heating feedflow')
Tgeo = 9.5 nw = Network(fluids=['water', 'R410A'], T_unit='C', p_unit='bar', h_unit='kJ / kg', m_unit='kg / s') # %% components cc = CycleCloser('cycle closer') # heat pump system cd = Condenser('condenser') va = Valve('valve') ev = HeatExchanger('evaporator') cp = Compressor('compressor') # geothermal heat collector gh_in = Source('ground heat feed flow') gh_out = Sink('ground heat return flow') ghp = Pump('ground heat loop pump') # heating system hs_feed = Sink('heating system feed flow') hs_ret = Source('heating system return flow') hsp = Pump('heating system pump') # %% connections # heat pump system
def setup(self): """ Full model validation of SEGS model in TESPy vs. EBSILON. Find original models at https://github.com/fwitte/SEGS_exergy. """ # specification of ambient state self.pamb = 1.013 self.Tamb = 25 # setting up network self.nw = Network(fluids=['water', 'INCOMP::TVP1', 'air']) self.nw.set_attr(T_unit='C', p_unit='bar', h_unit='kJ / kg', m_unit='kg / s', s_unit="kJ / kgK") # components definition air_in = Source('Ambient air source', fkt_group='CW') air_out = Sink('Ambient air sink', fkt_group='CW') closer_pt = CycleCloser('Cycle closer pt', fkt_group='SF') pt = ParabolicTrough('Parabolic trough', fkt_group='SF') ptpump = Pump('HTF pump', fkt_group='SF') closer = CycleCloser('Cycle closer power cycle', fkt_group='SG') eco = HeatExchanger('Economizer', fkt_group='SG') eva = HeatExchanger('Evaporator', fkt_group='SG') sup = HeatExchanger('Superheater', fkt_group='SG') drum = Drum('Drum', fkt_group='SG') reh = HeatExchanger('Reheater', fkt_group='RH') hpt1 = Turbine('HP turbine 1', fkt_group='HPT') hpt2 = Turbine('HP turbine 2', fkt_group='HPT') lpt1 = Turbine('LP turbine 1', fkt_group='LPT') lpt2 = Turbine('LP turbine 2', fkt_group='LPT') lpt3 = Turbine('LP turbine 3', fkt_group='LPT') lpt4 = Turbine('LP turbine 4', fkt_group='LPT') lpt5 = Turbine('LP turbine 5', fkt_group='LPT') cond = Condenser('Condenser', fkt_group='CW') condpump = Pump('Condenser pump', fkt_group='CW') fwt = Merge('Feedwater tank', num_in=3, fkt_group='LPP') fwp = Pump('Feedwater pump', fkt_group='FWP') cwp = Pump('Cooling water pump', fkt_group='CW') closer_cw = CycleCloser('Cycle closer cw', fkt_group='CW') ct = HeatExchanger('Cooling tower', fkt_group='CW') fan = Compressor('Cooling tower fan', fkt_group='CW') sp1 = Splitter('Splitter 1', fkt_group='HPT') sp2 = Splitter('Splitter 2', fkt_group='HPT') sp3 = Splitter('Splitter 3', fkt_group='LPT') sp4 = Splitter('Splitter 4', fkt_group='LPT') sp5 = Splitter('Splitter 5', fkt_group='LPT') sp6 = Splitter('Splitter 6', fkt_group='LPT') sp7 = Splitter('Splitter 7', fkt_group='SF') m1 = Merge('Merge 1', fkt_group='CW') m2 = Merge('Merge 2', fkt_group='HPP') m3 = Merge('Merge 3', fkt_group='LPP') m4 = Merge('Merge 4', fkt_group='LPP') m5 = Merge('Merge 5', fkt_group='SF') v1 = Valve('Valve 1', fkt_group='HPP') v2 = Valve('Valve 2', fkt_group='HPP') v3 = Valve('Valve 3', fkt_group='LPP') v4 = Valve('Valve 4', fkt_group='LPP') v5 = Valve('Valve 5', fkt_group='LPP') hppre1 = Condenser('High pressure preheater 1', fkt_group='HPP') hppre2 = Condenser('High pressure preheater 2', fkt_group='HPP') hppre1_sub = HeatExchanger('High pressure preheater 1 subcooling', fkt_group='HPP') hppre2_sub = HeatExchanger('High pressure preheater 2 subcooling', fkt_group='HPP') lppre1 = Condenser('Low pressure preheater 1', fkt_group='LPP') lppre2 = Condenser('Low pressure preheater 2', fkt_group='LPP') lppre3 = Condenser('Low pressure preheater 3', fkt_group='LPP') lppre1_sub = HeatExchanger('Low pressure preheater 1 subcooling', fkt_group='LPP') lppre2_sub = HeatExchanger('Low pressure preheater 2 subcooling', fkt_group='LPP') lppre3_sub = HeatExchanger('Low pressure preheater 3 subcooling', fkt_group='LPP') # connections definition # power cycle c1 = Connection(sup, 'out2', closer, 'in1', label='1') c2 = Connection(closer, 'out1', hpt1, 'in1', label='2') c3 = Connection(hpt1, 'out1', sp1, 'in1', label='3') c4 = Connection(sp1, 'out1', hpt2, 'in1', label='4') c5 = Connection(hpt2, 'out1', sp2, 'in1', label='5') c6 = Connection(sp2, 'out1', reh, 'in2', label='6') c7 = Connection(reh, 'out2', lpt1, 'in1', label='7') c8 = Connection(lpt1, 'out1', sp3, 'in1', label='8') c9 = Connection(sp3, 'out1', lpt2, 'in1', label='9') c10 = Connection(lpt2, 'out1', sp4, 'in1', label='10') c11 = Connection(sp4, 'out1', lpt3, 'in1', label='11') c12 = Connection(lpt3, 'out1', sp5, 'in1', label='12') c13 = Connection(sp5, 'out1', lpt4, 'in1', label='13') c14 = Connection(lpt4, 'out1', sp6, 'in1', label='14') c15 = Connection(sp6, 'out1', lpt5, 'in1', label='15') c16 = Connection(lpt5, 'out1', m1, 'in1', label='16') c17 = Connection(m1, 'out1', cond, 'in1', label='17') c18 = Connection(cond, 'out1', condpump, 'in1', label='18') c19 = Connection(condpump, 'out1', lppre1, 'in2', label='19') # c19 = Connection(condpump, 'out1', lppre1_sub, 'in2', label='19') # c20 = Connection(lppre1_sub, 'out2', lppre1, 'in2', label='20') c21 = Connection(lppre1, 'out2', lppre2, 'in2', label='21') # c21 = Connection(lppre1, 'out2', lppre2_sub, 'in2', label='21') # c22 = Connection(lppre2_sub, 'out2', lppre2, 'in2', label='22') c23 = Connection(lppre2, 'out2', lppre3, 'in2', label='23') # c23 = Connection(lppre2, 'out2', lppre3_sub, 'in2', label='23') # c24 = Connection(lppre3_sub, 'out2', lppre3, 'in2', label='24') c25 = Connection(lppre3, 'out2', fwt, 'in1', label='25') c26 = Connection(fwt, 'out1', fwp, 'in1', label='26') c27 = Connection(fwp, 'out1', hppre1, 'in2', label='27') c29 = Connection(hppre1, 'out2', hppre2, 'in2', label='29') c31 = Connection(hppre2, 'out2', eco, 'in2', label='31') c36 = Connection(sp1, 'out2', hppre2, 'in1', label='36') c37 = Connection(hppre2, 'out1', v1, 'in1', label='37') c39 = Connection(v1, 'out1', m2, 'in2', label='39') c40 = Connection(sp2, 'out2', m2, 'in1', label='40') c41 = Connection(m2, 'out1', hppre1, 'in1', label='41') c42 = Connection(hppre1, 'out1', v2, 'in1', label='42') c44 = Connection(v2, 'out1', fwt, 'in2', label='44') c45 = Connection(sp3, 'out2', fwt, 'in3', label='45') c46 = Connection(sp4, 'out2', lppre3, 'in1', label='46') c47 = Connection(lppre3, 'out1', v3, 'in1', label='47') # c47 = Connection(lppre3, 'out1', lppre3_sub, 'in1', label='47') # c48 = Connection(lppre3_sub, 'out1', v3, 'in1', label='48') c49 = Connection(v3, 'out1', m3, 'in1', label='49') c50 = Connection(sp5, 'out2', m3, 'in2', label='50') c51 = Connection(m3, 'out1', lppre2, 'in1', label='51') c52 = Connection(lppre2, 'out1', v4, 'in1', label='52') # c52 = Connection(lppre2, 'out1', lppre2_sub, 'in1', label='52') # c53 = Connection(lppre2_sub, 'out1', v4, 'in1', label='53') c54 = Connection(v4, 'out1', m4, 'in2', label='54') c55 = Connection(sp6, 'out2', m4, 'in1', label='55') c56 = Connection(m4, 'out1', lppre1, 'in1', label='56') c57 = Connection(lppre1, 'out1', v5, 'in1', label='57') # c57 = Connection(lppre1, 'out1', lppre1_sub, 'in1', label='57') # c58 = Connection(lppre1_sub, 'out1', v5, 'in1', label='58') c59 = Connection(v5, 'out1', m1, 'in2', label='59') # components from subsystem c32 = Connection(eco, 'out2', drum, 'in1', label='32') c33 = Connection(drum, 'out1', eva, 'in2', label='33') c34 = Connection(eva, 'out2', drum, 'in2', label='34') c35 = Connection(drum, 'out2', sup, 'in2', label='35') c73 = Connection(sup, 'out1', eva, 'in1', label='73') c74 = Connection(eva, 'out1', eco, 'in1', label='74') # cooling water c60 = Connection(cond, 'out2', closer_cw, 'in1', label='60') c61 = Connection(closer_cw, 'out1', ct, 'in1', label='61') c62 = Connection(ct, 'out1', cwp, 'in1', label='62') c63 = Connection(cwp, 'out1', cond, 'in2', label='63') # cooling tower c64 = Connection(air_in, 'out1', fan, 'in1', label='64') c65 = Connection(fan, 'out1', ct, 'in2', label='65') c66 = Connection(ct, 'out2', air_out, 'in1', label='66') # parabolic trough cycle c70 = Connection(pt, 'out1', closer_pt, 'in1', label='67') c71 = Connection(closer_pt, 'out1', sp7, 'in1', label='71') c72 = Connection(sp7, 'out1', sup, 'in1', label='72') c75 = Connection(eco, 'out1', m5, 'in1', label='75') c76 = Connection(sp7, 'out2', reh, 'in1', label='76') c77 = Connection(reh, 'out1', m5, 'in2', label='77') c78 = Connection(m5, 'out1', ptpump, 'in1', label='78') c79 = Connection(ptpump, 'out1', pt, 'in1', label='79') # add connections to network self.nw.add_conns(c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15, c16, c17, c18, c19, c21, c23, c25, c26, c27, c29, c31, c32, c33, c34, c35, c36, c37, c39, c40, c41, c42, c44, c45, c46, c47, c49, c50, c51, c52, c54, c55, c56, c57, c59, c60, c61, c62, c63, c64, c65, c66, c70, c71, c72, c73, c74, c75, c76, c77, c78, c79) # power bus power = Bus('total output power') power.add_comps({ 'comp': hpt1, 'char': 0.97, 'base': 'component' }, { 'comp': hpt2, 'char': 0.97, 'base': 'component' }, { 'comp': lpt1, 'char': 0.97, 'base': 'component' }, { 'comp': lpt2, 'char': 0.97, 'base': 'component' }, { 'comp': lpt3, 'char': 0.97, 'base': 'component' }, { 'comp': lpt4, 'char': 0.97, 'base': 'component' }, { 'comp': lpt5, 'char': 0.97, 'base': 'component' }, { 'comp': fwp, 'char': 0.95, 'base': 'bus' }, { 'comp': condpump, 'char': 0.95, 'base': 'bus' }, { 'comp': ptpump, 'char': 0.95, 'base': 'bus' }, { 'comp': cwp, 'char': 0.95, 'base': 'bus' }, { 'comp': fan, 'char': 0.95, 'base': 'bus' }) heat_input_bus = Bus('heat input') heat_input_bus.add_comps({'comp': pt, 'base': 'bus'}) exergy_loss_bus = Bus('exergy loss') exergy_loss_bus.add_comps({ 'comp': air_in, 'base': 'bus' }, {'comp': air_out}) self.nw.add_busses(power, heat_input_bus, exergy_loss_bus) # component parameters pt.set_attr(doc=0.95, aoi=0, Tamb=25, A='var', eta_opt=0.73, c_1=0.00496, c_2=0.000691, E=1000, iam_1=1, iam_2=1) ptpump.set_attr(eta_s=0.6) eco.set_attr() eva.set_attr(ttd_l=5) sup.set_attr() hpt1.set_attr(eta_s=0.8376) hpt2.set_attr(eta_s=0.8463) lpt1.set_attr(eta_s=0.8623) lpt2.set_attr(eta_s=0.917) lpt3.set_attr(eta_s=0.9352) lpt4.set_attr(eta_s=0.88) lpt5.set_attr(eta_s=0.6445) cond.set_attr(pr1=1, pr2=0.9, ttd_u=5) condpump.set_attr(eta_s=0.7) fwp.set_attr(eta_s=0.7) cwp.set_attr(eta_s=0.7) ct.set_attr(pr1=0.95) fan.set_attr(eta_s=0.6) lppre1.set_attr(pr1=1, ttd_u=5) lppre2.set_attr(pr1=1, ttd_u=5) lppre3.set_attr(pr1=1, ttd_u=5) hppre1.set_attr(pr1=1, ttd_u=5) hppre2.set_attr(pr1=1, ttd_u=5) lppre1_sub.set_attr(pr1=1, pr2=1, ttd_l=10) lppre2_sub.set_attr(pr1=1, pr2=1, ttd_l=10) lppre3_sub.set_attr(pr1=1, pr2=1, ttd_l=10) hppre1_sub.set_attr(pr1=1, pr2=1, ttd_l=10) hppre2_sub.set_attr(pr1=1, pr2=1, ttd_l=10) # connection parameters # parabolic trough cycle c70.set_attr(fluid={'TVP1': 1, 'water': 0, 'air': 0}, T=390, p=23.304) c76.set_attr(m=Ref(c70, 0.1284, 0)) c73.set_attr(p=22.753) c74.set_attr(p=21.167) c78.set_attr(p=20.34) c79.set_attr(p=41.024) # cooling water c62.set_attr(fluid={ 'TVP1': 0, 'water': 1, 'air': 0 }, T=30, p=self.pamb) # cooling tower c64.set_attr(fluid={ 'water': 0, 'TVP1': 0, 'air': 1 }, p=self.pamb, T=self.Tamb) c65.set_attr(p=self.pamb + 0.0005) c66.set_attr(p=self.pamb, T=30) # power cycle c32.set_attr(Td_bp=-2) c34.set_attr(x=0.5) c1.set_attr(fluid={'water': 1, 'TVP1': 0, 'air': 0}, p=100, T=371) # steam generator pressure values c31.set_attr(p=103.56) c35.set_attr(p=103.42) # turbine pressure values c3.set_attr(p=33.61, m=38.969) c5.set_attr(p=18.58) c7.set_attr(p=17.1, T=371) c8.set_attr(p=7.98) c10.set_attr(p=2.73) c12.set_attr(p=0.96) c14.set_attr(p=0.29) # preheater pressure values c19.set_attr(p=14.755, state='l') c21.set_attr(p=9.9975, state='l') c23.set_attr(p=8.7012, state='l') c25.set_attr(state='l') c27.set_attr(p=125) c29.set_attr(p=112) # condensation c16.set_attr(p=0.08) # feedwater tank c26.set_attr(x=0) # a stable solution is generated for parts of the network self.nw.solve(mode='design') self.nw.del_conns(c19, c21, c23, c27, c29, c37, c42, c47, c52, c57) c19 = Connection(condpump, 'out1', lppre1_sub, 'in2', label='19') c20 = Connection(lppre1_sub, 'out2', lppre1, 'in2', label='20') c21 = Connection(lppre1, 'out2', lppre2_sub, 'in2', label='21') c22 = Connection(lppre2_sub, 'out2', lppre2, 'in2', label='22') c23 = Connection(lppre2, 'out2', lppre3_sub, 'in2', label='23') c24 = Connection(lppre3_sub, 'out2', lppre3, 'in2', label='24') c27 = Connection(fwp, 'out1', hppre1_sub, 'in2', label='27') c28 = Connection(hppre1_sub, 'out2', hppre1, 'in2', label='28') c29 = Connection(hppre1, 'out2', hppre2_sub, 'in2', label='29') c30 = Connection(hppre2_sub, 'out2', hppre2, 'in2', label='30') c37 = Connection(hppre2, 'out1', hppre2_sub, 'in1', label='37') c38 = Connection(hppre2_sub, 'out1', v1, 'in1', label='38') c42 = Connection(hppre1, 'out1', hppre1_sub, 'in1', label='42') c43 = Connection(hppre1_sub, 'out1', v2, 'in1', label='43') c47 = Connection(lppre3, 'out1', lppre3_sub, 'in1', label='47') c48 = Connection(lppre3_sub, 'out1', v3, 'in1', label='48') c52 = Connection(lppre2, 'out1', lppre2_sub, 'in1', label='52') c53 = Connection(lppre2_sub, 'out1', v4, 'in1', label='53') c57 = Connection(lppre1, 'out1', lppre1_sub, 'in1', label='57') c58 = Connection(lppre1_sub, 'out1', v5, 'in1', label='58') self.nw.add_conns(c19, c20, c21, c22, c23, c24, c27, c28, c29, c30, c37, c38, c42, c43, c47, c48, c52, c53, c57, c58) # specification of missing parameters c19.set_attr(p=14.755) c21.set_attr(p=9.9975, state='l') c23.set_attr(p=8.7012, state='l') c27.set_attr(p=125) c29.set_attr(p=112) # solve final state self.nw.solve(mode='design')
def __init__(self, working_fluid): """Set up model.""" self.working_fluid = working_fluid fluids = ['water', self.working_fluid, 'air'] self.nw = Network(fluids=fluids) self.nw.set_attr(p_unit='bar', T_unit='C', h_unit='kJ / kg') # geo parameters self.geo_mass_flow = 200 geo_steam_share = 0.1 self.T_brine_in = 140 # ambient parameters self.T_amb = 5 self.p_amb = 0.6 # main components geo_steam = Source('geosteam source') geo_brine = Source('geobrine source') geo_reinjection = Sink('re-injection') air_in = Source('air source') air_out = Sink('air sink') air_fan = Compressor('air fan') air_cond = Condenser('condenser') orc_cc = CycleCloser('orc cycle closer') evap_splitter = Splitter('splitter evaporation') evap_merge = Merge('merge evaporation') evap_steam = Condenser('geosteam evaporator') evap_brine = HeatExchanger('geobrine evaporator') dr = Drum('drum') geo_merge = Merge('merge brine') pre = HeatExchanger('preheater') feed_working_fluid_pump = Pump('feed pump') tur = Turbine('turbine') ihe = HeatExchanger('internal heat exchanger') # busses net_power = Bus('net power output') net_power.add_comps( {'comp': tur, 'char': 0.97}, {'comp': feed_working_fluid_pump, 'char': 0.97, 'base': 'bus'}, {'comp': air_fan, 'char': 0.97, 'base': 'bus'} ) ORC_power_bus = Bus('cycle gross power output') ORC_power_bus.add_comps( {'comp': tur}, {'comp': feed_working_fluid_pump} ) geothermal_bus = Bus('thermal input') geothermal_bus.add_comps( {'comp': pre, 'char': -1}, {'comp': evap_brine, 'char': -1}, {'comp': evap_steam, 'char': -1} ) self.nw.add_busses(net_power, ORC_power_bus, geothermal_bus) # turbine to condenser c1 = Connection(orc_cc, 'out1', tur, 'in1', label='1') c2 = Connection(tur, 'out1', ihe, 'in1', label='2') c3 = Connection(ihe, 'out1', air_cond, 'in1', label='3') self.nw.add_conns(c1, c2, c3) # condenser to steam generator c4 = Connection(air_cond, 'out1', feed_working_fluid_pump, 'in1', label='4') c5 = Connection(feed_working_fluid_pump, 'out1', ihe, 'in2', label='5') self.nw.add_conns(c4, c5) # steam generator c6 = Connection(ihe, 'out2', pre, 'in2', label='6') c7 = Connection(pre, 'out2', dr, 'in1', label='7') c8 = Connection(dr, 'out1', evap_splitter, 'in1', label='8') c9 = Connection(evap_splitter, 'out2', evap_steam, 'in2', label='9') c10 = Connection(evap_steam, 'out2', evap_merge, 'in2', label='10') c11 = Connection(evap_splitter, 'out1', evap_brine, 'in2', label='11') c12 = Connection(evap_brine, 'out2', evap_merge, 'in1', label='12') c13 = Connection(evap_merge, 'out1', dr, 'in2', label='13') c0 = Connection(dr, 'out2', orc_cc, 'in1', label='0') self.nw.add_conns(c6, c7, c8, c11, c9, c12, c10, c13, c0) # condenser cold side c20 = Connection(air_in, 'out1', air_fan, 'in1', label='20') c21 = Connection(air_fan, 'out1', air_cond, 'in2', label='21') c22 = Connection(air_cond, 'out2', air_out, 'in1', label='22') self.nw.add_conns(c20, c21, c22) # geo source c30 = Connection(geo_steam, 'out1', evap_steam, 'in1', label='30') c31 = Connection(evap_steam, 'out1', geo_merge, 'in1', label='31') c32 = Connection(geo_brine, 'out1', geo_merge, 'in2', label='32') c33 = Connection(geo_merge, 'out1', evap_brine, 'in1', label='33') self.nw.add_conns(c30, c31, c32, c33) c34 = Connection(evap_brine, 'out1', pre, 'in1', label='34') c35 = Connection(pre, 'out1', geo_reinjection, 'in1', label='35') self.nw.add_conns(c34, c35) # generate a set of stable starting values of every working fluid # fluid settings c6.set_attr(fluid={self.working_fluid: 1.0, 'air': 0.0, 'water': 0.0}) c20.set_attr(fluid={self.working_fluid: 0.0, 'air': 1.0, 'water': 0.0}) c30.set_attr(fluid={self.working_fluid: 0.0, 'air': 0.0, 'water': 1.0}) c32.set_attr(fluid={self.working_fluid: 0.0, 'air': 0.0, 'water': 1.0}) # connection parameters p0 = PSI('P', 'T', self.T_brine_in + 273.15, 'Q', 1, self.working_fluid) c1.set_attr(p0=p0 / 1e5) ws_stable_h0 = ( PSI('H', 'T', self.T_amb + 273.15, 'Q', 1, self.working_fluid) + 0.5 * ( PSI('H', 'T', self.T_brine_in + 273.15, 'Q', 1, self.working_fluid) - PSI('H', 'T', self.T_amb + 273.15, 'Q', 1, self.working_fluid) ) ) / 1e3 c2.set_attr(h=ws_stable_h0) p0 = PSI('P', 'T', self.T_amb + 273.15, 'Q', 1, self.working_fluid) c3.set_attr(Td_bp=5, design=['Td_bp'], p0=p0 / 1e5) c5.set_attr(h=Ref(c4, 1, 1)) # steam generator c30.set_attr( m=self.geo_mass_flow * geo_steam_share, T=self.T_brine_in, x=1, p0=5) c32.set_attr( m=self.geo_mass_flow * (1 - geo_steam_share), T=self.T_brine_in, x=0) c13.set_attr() c12.set_attr(x=0.5) c10.set_attr(x=0.5, design=['x']) c34.set_attr(h=Ref(c33, 1, -50)) c7.set_attr(Td_bp=-2) # main condenser c20.set_attr(p=self.p_amb, T=self.T_amb) c22.set_attr(T=self.T_amb + 15, p=self.p_amb) # component parameters # condensing ihe.set_attr(pr1=0.98, pr2=0.98) air_cond.set_attr(pr1=1, pr2=0.995, ttd_u=10) air_fan.set_attr(eta_s=0.6) # steam generator evap_brine.set_attr(pr1=0.98, ttd_l=8) pre.set_attr(pr1=0.98, pr2=0.98) self.nw.set_attr(iterinfo=False) self.nw.solve('design') self.nw.save('stable_' + self.working_fluid) # specify actual parameters tur.set_attr(eta_s=0.9) feed_working_fluid_pump.set_attr(eta_s=0.75) c2.set_attr(h=None) c5.set_attr(h=None) c34.set_attr(h=None, T=Ref(c33, 1, -10)) self.nw.solve('design') c22.set_attr(T=None) c3.set_attr(Td_bp=None) self.ude_IHE_size = UserDefinedEquation( label='ihe deshuperheat ratio', func=desuperheat, deriv=desuperheat_deriv, latex={ 'equation': r'0 = h_3 - h_2 - x_\mathrm{IHE} \cdot \left(h_3 -' r'h\left(p_2, T_5 + \Delta T_\mathrm{t,u,min} \right)' r'\right)'}, conns=[ self.nw.get_conn('2'), self.nw.get_conn('3'), self.nw.get_conn('5')], params={'distance': 0.0, 'ttd_min': 2} ) if self.nw.lin_dep or self.nw.res[-1] > 1e-3: msg = 'No stable solution found.' raise TESPyNetworkError(msg) print( 'Generated stable starting values for working fluid ' + self.working_fluid + '.')
def setup(self): # %% network setup self.nw = Network(fluids=['water', 'NH3'], T_unit='C', p_unit='bar', h_unit='kJ / kg', m_unit='kg / s') # %% components # sources & sinks cc_coolant = CycleCloser('coolant cycle closer') cc_consumer = CycleCloser('consumer cycle closer') amb_in = Source('source ambient') amb_out = Sink('sink ambient') ic_in = Source('source intercool') ic_out = Sink('sink intercool') # consumer system cd = HeatExchanger('condenser') rp = Pump('recirculation pump') cons = HeatExchangerSimple('consumer') # evaporator system va = Valve('valve') dr = Drum('drum') ev = HeatExchanger('evaporator') su = HeatExchanger('superheater') pu = Pump('pump evaporator') # compressor-system cp1 = Compressor('compressor 1') cp2 = Compressor('compressor 2') he = HeatExchanger('intercooler') # busses self.power = Bus('total compressor power') self.power.add_comps({ 'comp': cp1, 'base': 'bus' }, { 'comp': cp2, 'base': 'bus' }) self.heat = Bus('total delivered heat') self.heat.add_comps({'comp': cd, 'char': -1}) self.nw.add_busses(self.power, self.heat) # %% connections # consumer system c_in_cd = Connection(cc_coolant, 'out1', cd, 'in1') cb_rp = Connection(cc_consumer, 'out1', rp, 'in1') rp_cd = Connection(rp, 'out1', cd, 'in2') self.cd_cons = Connection(cd, 'out2', cons, 'in1') cons_cf = Connection(cons, 'out1', cc_consumer, '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', cc_coolant, '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={ 'char_func': CharLine(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 = {'char_func': CharLine(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 = {'char_func': CharLine(x, y), 'param': 'm'} ev.set_attr(pr1=1, pr2=.999, ttd_l=5, design=['ttd_l'], offdesign=['kA_char'], 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 = {'char_func': CharLine(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 = {'char_func': CharLine(x, y), 'param': 'm'} su.set_attr(kA_char1=kA_char1, kA_char2=kA_char2, offdesign=['zeta1', 'zeta2', 'kA_char']) 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={ 'char_func': CharLine(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={ 'char_func': CharLine(x, y), 'param': 'm' }) cp2.set_attr(eta_s=0.8, design=['eta_s'], offdesign=['eta_s_char'], eta_s_char={ 'char_func': CharLine(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 ]) kA_char1 = {'char_func': CharLine(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 = {'char_func': CharLine(x, y), 'param': 'm'} he.set_attr(kA_char1=kA_char1, kA_char2=kA_char2, offdesign=['zeta1', 'zeta2', 'kA_char']) # 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 = {'char_func': CharLine(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 = {'char_func': CharLine(x, y), 'param': 'm'} cd.set_attr(kA_char1=kA_char1, kA_char2=kA_char2, pr2=0.9998, design=['pr2'], offdesign=['zeta2', 'kA_char']) # %% 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) cd_va.set_attr(p=Ref(c_in_cd, 1, -0.01), Td_bp=-5, 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, -0.05), Td_bp=5, 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, -0.001), 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, -0.01), 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, -0.002), design=['p'])
def test_HeatExchanger(self): """Test component properties of heat exchanger.""" instance = HeatExchanger('heat exchanger') self.setup_HeatExchanger_network(instance) # design specification instance.set_attr(pr1=0.98, pr2=0.98, ttd_u=5, design=['pr1', 'pr2', 'ttd_u'], offdesign=['zeta1', 'zeta2', 'kA_char']) self.c1.set_attr(T=120, p=3, fluid={'Ar': 0, 'H2O': 1, 'S800': 0}) self.c2.set_attr(T=70) self.c3.set_attr(T=40, p=5, fluid={'Ar': 1, 'H2O': 0, 'S800': 0}) b = Bus('heat transfer', P=-80e3) b.add_comps({'comp': instance}) self.nw.add_busses(b) self.nw.solve('design') convergence_check(self.nw.lin_dep) self.nw.save('tmp') Q_design = instance.Q.val # test specified kA value instance.set_attr(kA=instance.kA.val * 2 / 3) b.set_attr(P=None) self.nw.solve('design') convergence_check(self.nw.lin_dep) # test heat transfer Q = self.c1.m.val_SI * (self.c2.h.val_SI - self.c1.h.val_SI) msg = ( 'Value of heat flow must be ' + str(round(Q_design * 2 / 3, 0)) + ', is ' + str(round(Q, 0)) + '.') assert round(Q, 1) == round(Q_design * 2 / 3, 1), msg # back to design case instance.set_attr(kA=None) b.set_attr(P=Q_design) self.nw.solve('design') convergence_check(self.nw.lin_dep) # check heat transfer Q = self.c1.m.val_SI * (self.c2.h.val_SI - self.c1.h.val_SI) td_log = ((self.c2.T.val - self.c3.T.val - self.c1.T.val + self.c4.T.val) / np.log((self.c2.T.val - self.c3.T.val) / (self.c1.T.val - self.c4.T.val))) kA = round(-Q / td_log, 0) msg = ('Value of heat transfer must be ' + str(round(Q, 0)) + ', is ' + str(round(instance.Q.val, 0)) + '.') assert round(Q, 0) == round(instance.Q.val, 0), msg # check upper terminal temperature difference msg = ('Value of terminal temperature difference must be ' + str(round(instance.ttd_u.val, 1)) + ', is ' + str(round(self.c1.T.val - self.c4.T.val, 1)) + '.') ttd_u_calc = round(self.c1.T.val - self.c4.T.val, 1) ttd_u = round(instance.ttd_u.val, 1) assert ttd_u_calc == ttd_u, msg # check lower terminal temperature difference self.c2.set_attr(T=np.nan) instance.set_attr(ttd_l=20) self.nw.solve('design') convergence_check(self.nw.lin_dep) msg = ('Value of terminal temperature difference must be ' + str(instance.ttd_l.val) + ', is ' + str(self.c2.T.val - self.c3.T.val) + '.') ttd_l_calc = round(self.c2.T.val - self.c3.T.val, 1) ttd_l = round(instance.ttd_l.val, 1) assert ttd_l_calc == ttd_l, msg # check specified kA value (by offdesign parameter), reset temperatures # to design state self.c2.set_attr(T=70) instance.set_attr(ttd_l=np.nan) self.nw.solve('offdesign', design_path='tmp') convergence_check(self.nw.lin_dep) msg = ('Value of heat flow must be ' + str(instance.Q.val) + ', is ' + str(round(Q, 0)) + '.') assert round(Q, 0) == round(instance.Q.val, 0), msg msg = ('Value of heat transfer coefficient must be ' + str(kA) + ', is ' + str(round(instance.kA.val, 0)) + '.') assert kA == round(instance.kA.val, 0), msg # trigger negative lower terminal temperature difference as result self.c4.set_attr(T=np.nan) self.c2.set_attr(T=30) self.nw.solve('design') convergence_check(self.nw.lin_dep) msg = ('Value of upper terminal temperature differences must be ' 'smaller than zero, is ' + str(round(instance.ttd_l.val, 1)) + '.') assert instance.ttd_l.val < 0, msg # trigger negative upper terminal temperature difference as result self.c4.set_attr(T=100) self.c2.set_attr(h=200e3, T=np.nan) instance.set_attr(pr1=0.98, pr2=0.98, ttd_u=np.nan, design=['pr1', 'pr2']) self.c1.set_attr(h=150e3, T=np.nan) self.c3.set_attr(T=40) self.nw.solve('design') convergence_check(self.nw.lin_dep) msg = ('Value of upper terminal temperature differences must be ' 'smaller than zero, is ' + str(round(instance.ttd_u.val, 1)) + '.') assert instance.ttd_u.val < 0, msg shutil.rmtree('./tmp', ignore_errors=True)
Tgeo = 9.5 nw = Network(fluids=['water', 'R410A'], T_unit='C', p_unit='bar', h_unit='kJ / kg', m_unit='kg / s') # %% components cc = CycleCloser('cycle closer') # heat pump system cd = Condenser('condenser') va = Valve('valve') ev = HeatExchanger('evaporator') cp = Compressor('compressor') # geothermal heat collector gh_in = Source('ground heat feed flow') gh_out = Sink('ground heat return flow') ghp = Pump('ground heat loop pump') # heating system hs_feed = Sink('heating system feed flow') hs_ret = Source('heating system return flow') hsp = Pump('heating system pump') # %% connections # heat pump system
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 = CombustionChamber('combustion') g_turb = Turbine('gas turbine') CH4 = Source('fuel source') air = Source('ambient air') # waste heat recovery suph = HeatExchanger('superheater') evap = HeatExchanger('evaporator') drum = Drum('drum') eco = HeatExchanger('economizer') ch = Sink('chimney') # steam turbine part turb_hp = Turbine('steam turbine high pressure') cond_dh = Condenser('district heating condenser') mp_split = Splitter('mp split') turb_lp = Turbine('steam turbine low pressure') cond = Condenser('condenser') merge = Merge('merge') pump1 = Pump('feed water pump 1') pump2 = Pump('feed water pump 2') ls_out = Sink('ls sink')
# %% network nw = Network(fluids=['water'], T_unit='C', p_unit='bar', h_unit='kJ / kg', m_unit='kg / s') # %% components # sources & sinks tesin = Sink('TES in') tesout = Source('TES out') hsin = Sink('HS in') hsout = Source('HS out') # heat exchanger he = HeatExchanger('heat exchanger') # %% connections tes_he = Connection(tesout, 'out1', he, 'in2') he_tes = Connection(he, 'out2', tesin, 'in1') hs_he = Connection(hsout, 'out1', he, 'in1') he_hs = Connection(he, 'out1', hsin, 'in1') nw.add_conns(tes_he, he_tes, hs_he, he_hs) # %% busses heat = Bus('heat system') heat_sto = Bus('heat storage')
# %% components # sinks & sources amb = Source('ambient') sf = Source('fuel') chbp = Sink('chimney bypass') ch = Sink('chimney') cw = Source('cooling water') pump = Pump('cooling water pump') cw_split = Splitter('cooling water splitter') cw_merge = Merge('cooling water merge') fg_split = Splitter('flue gas splitter') fgc = HeatExchanger('flue gas cooler') cons = HeatExchangerSimple('consumer') cw_out = Sink('cooling water sink') # combustion engine ice = CombustionEngine(label='internal combustion engine') # %% connections amb_comb = Connection(amb, 'out1', ice, 'in3') sf_comb = Connection(sf, 'out1', ice, 'in4') comb_fg = Connection(ice, 'out3', fg_split, 'in1') fg_fgc = Connection(fg_split, 'out1', fgc, 'in1') fg_chbp = Connection(fg_split, 'out2', chbp, 'in1')