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@Keiv4n, thank you for reaching out and sorry for my late response, I was in holidays for a couple of days. You can have three inlets on a merge or outlets on a splitter (or even more) if you want. You have to specify the number when creating the component, i.e. from tespy.components.basics.cycle_closer import CycleCloser
from tespy.networks import Network
from tespy.components import (
CycleCloser, Pipe, Pump, Valve, HeatExchangerSimple, Splitter, Merge
)
from tespy.connections import Connection
fluid_list = ['INCOMP::Water']
nw = Network(fluids=fluid_list)
nw.set_attr(T_unit='C', p_unit='bar', h_unit='kJ / kg')
# central heating plant
hs = HeatExchangerSimple('heat source')
cc = CycleCloser('cycle closer')
pu = Pump('feed pump')
# consumer
cons_0 = HeatExchangerSimple('consumer 0')
cons_1 = HeatExchangerSimple('consumer 1')
cons_2 = HeatExchangerSimple('consumer 2')
cons_3 = HeatExchangerSimple('consumer 3')
val_0 = Valve('control valve 0')
val_1 = Valve('control valve 1')
val_2 = Valve('control valve 2')
val_3 = Valve('control valve 3')
# pipes
pipe_feed_0 = Pipe('feed pipe 0')
pipe_feed_1 = Pipe('feed pipe 1')
pipe_feed_2 = Pipe('feed pipe 2')
pipe_feed_3 = Pipe('feed pipe 3')
pipe_feed_4 = Pipe('feed pipe 4')
pipe_feed_5 = Pipe('feed pipe 5')
pipe_return_0 = Pipe('return pipe 0')
pipe_return_1 = Pipe('return pipe 1')
pipe_return_2 = Pipe('return pipe 2')
pipe_return_3 = Pipe('return pipe 3')
pipe_return_4 = Pipe('return pipe 4')
pipe_return_5 = Pipe('return pipe 5')
# pipe splitters
sp_f_0 = Splitter("feed water splitter of source", num_out=3)
merg_r_0 = Merge("return water merger of source", num_in=3)
sp_f_1 = Splitter("feed water splitter of neighbors")
merg_r_1 = Merge("return water merger of neigbors")
# connections
c0 = Connection(cc, "out1", hs, "in1", label="0")
c1 = Connection(hs, "out1", pu, "in1", label="1")
c2 = Connection(pu, "out1", pipe_feed_0, "in1", label="2")
c3 = Connection(pipe_feed_0, "out1", sp_f_0, "in1", label="3")
c4 = Connection(sp_f_0, "out1", pipe_feed_1, "in1", label="4")
c5 = Connection(sp_f_0, "out2", pipe_feed_2, "in1", label="5")
c6 = Connection(sp_f_0, "out3", pipe_feed_5, "in1", label="6")
c7 = Connection(pipe_feed_1, "out1", cons_0, "in1", label="7")
c8 = Connection(pipe_feed_2, "out1", sp_f_1, "in1", label="8")
c9 = Connection(sp_f_1, "out1", pipe_feed_3, "in1", label="9")
c10 = Connection(sp_f_1, "out2", pipe_feed_4, "in1", label="10")
c11 = Connection(pipe_feed_3, "out1", cons_1, "in1", label="11")
c12 = Connection(pipe_feed_4, "out1", cons_2, "in1", label="12")
c13 = Connection(pipe_feed_5, "out1", cons_3, "in1", label="13")
c14 = Connection(cons_0, "out1", val_0, "in1", label="14")
c15 = Connection(cons_1, "out1", val_1, "in1", label="15")
c16 = Connection(cons_2, "out1", val_2, "in1", label="16")
c17 = Connection(cons_3, "out1", val_3, "in1", label="17")
c18 = Connection(val_0, "out1", pipe_return_1, "in1", label="18")
c19 = Connection(val_1, "out1", pipe_return_3, "in1", label="19")
c20 = Connection(val_2, "out1", pipe_return_4, "in1", label="20")
c21 = Connection(val_3, "out1", pipe_return_5, "in1", label="21")
c22 = Connection(pipe_return_3, "out1", merg_r_1, "in1", label="22")
c23 = Connection(pipe_return_4, "out1", merg_r_1, "in2", label="23")
c24 = Connection(merg_r_1, "out1", pipe_return_2, "in1", label="24")
c25 = Connection(pipe_return_1, "out1", merg_r_0, "in1", label="25")
c26 = Connection(pipe_return_2, "out1", merg_r_0, "in2", label="26")
c27 = Connection(pipe_return_5, "out1", merg_r_0, "in3", label="27")
c28 = Connection(merg_r_0, "out1", pipe_return_0, "in1", label="28")
c29 = Connection(pipe_return_0, "out1", cc, "in1", label="29")
nw.add_conns(c0, c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15, c16, c17, c18, c19, c20, c21,
c22, c23, c24, c25, c26, c27, c28, c29)
cons_0.set_attr(Q=-9000, pr=0.97)
cons_1.set_attr(Q=-7500, pr=0.97)
cons_2.set_attr(Q=-8000, pr=0.97)
cons_3.set_attr(Q=-10000, pr=0.97)
hs.set_attr(pr=1)
pu.set_attr(eta_s=0.75)
pipe_feed_0.set_attr(Q=-250, pr=0.97)
pipe_feed_1.set_attr(Q=-250, pr=0.97)
pipe_feed_2.set_attr(Q=-250, pr=0.97)
pipe_feed_3.set_attr(Q=-250, pr=0.97)
pipe_feed_4.set_attr(Q=-250, pr=0.97)
pipe_feed_5.set_attr(Q=-250, pr=0.97)
pipe_return_0.set_attr(Q=-200, pr=0.97)
pipe_return_1.set_attr(Q=-200, pr=0.97)
pipe_return_2.set_attr(Q=-200, pr=0.97)
pipe_return_3.set_attr(Q=-200, pr=0.97)
pipe_return_4.set_attr(Q=-200, pr=0.97)
pipe_return_5.set_attr(Q=-200, pr=0.97)
c1.set_attr(T=90, p=5, fluid={'Water': 1})
c2.set_attr(p=7)
c8.set_attr(T=65)
c9.set_attr(T=65)
nw.solve(mode="design") |
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Hello Francesco, I hope you're doing well. I have a question regarding the implementation of a district heating network. I want to simulate this network, as shown in the attached topology. I was thinking of using two splitters (one for the pipes feeding from the source with three outputs and another for the neighbors with two outputs) and two mergers (specified in the green square in the picture) as a possible solution. However, it seems that the splitter can only have a maximum of two outputs, so maybe there is room for improvement.
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