예제 #1
0
def test_pump_from_regression_parameteres():
    """

        :return:
        :rtype:
        """
    net = pandapipes.create_empty_network("net", add_stdtypes=False)

    j1 = pandapipes.create_junction(net, pn_bar=5, tfluid_k=283.15)
    j2 = pandapipes.create_junction(net, pn_bar=5, tfluid_k=283.15)
    j3 = pandapipes.create_junction(net, pn_bar=5, tfluid_k=283.15)
    j4 = pandapipes.create_junction(net, pn_bar=5, tfluid_k=283.15)

    pandapipes.create_pipe_from_parameters(net,
                                           j1,
                                           j2,
                                           k_mm=1.,
                                           length_km=0.43380,
                                           diameter_m=0.1022)
    pandapipes.create_pipe_from_parameters(net,
                                           j3,
                                           j4,
                                           k_mm=1.,
                                           length_km=0.26370,
                                           diameter_m=0.1022)
    pandapipes.create_ext_grid(net, j1, 5, 283.15, type="p")
    pandapipes.create_pump_from_parameters(net,
                                           j2,
                                           j3,
                                           'P1',
                                           regression_parameters=[
                                               -1.48620799e-04,
                                               -1.29656785e-02, 6.10000000e+00
                                           ])
    pandapipes.create_sink(net, j4, 0.02333)

    pandapipes.create_fluid_from_lib(net, "lgas", overwrite=True)

    pandapipes.pipeflow(net,
                        stop_condition="tol",
                        iter=3,
                        friction_model="nikuradse",
                        mode="hydraulics",
                        transient=False,
                        nonlinear_method="automatic",
                        tol_p=1e-4,
                        tol_v=1e-4)

    data = pd.read_csv(os.path.join(internals_data_path, "test_pump.csv"),
                       sep=';')

    res_junction = net.res_junction.p_bar.values
    res_pipe = net.res_pipe.v_mean_m_per_s.values

    p_diff = np.abs(1 - res_junction / data['p'].dropna().values)
    v_diff = np.abs(1 - res_pipe / data['v'].dropna().values)

    assert np.all(p_diff < 0.01)
    assert np.all(v_diff < 0.01)
예제 #2
0
def test_additional_tables():
    net = pandapipes.create_empty_network()
    pandapipes.create_junction(net, pn_bar=5, tfluid_k=283)
    pandapipes.create_junction(net, pn_bar=5, tfluid_k=283)

    pandapipes.add_new_component(net, Sink)
    sink_input = list(copy.deepcopy(net.sink.columns))
    pandapipes.create_sink(net, 1, mdot_kg_per_s=1)
    sink_input_create = list(net.sink.columns)
    assert sink_input == sink_input_create, "Input does not equal create-table"

    pandapipes.add_new_component(net, Source)
    source_input = list(copy.deepcopy(net.source.columns))
    pandapipes.create_source(net, 1, mdot_kg_per_s=1)
    source_input_create = list(net.source.columns)
    assert source_input == source_input_create, "Input does not equal create-table"

    pandapipes.add_new_component(net, Pump)
    pump_input = list(copy.deepcopy(net.pump.columns))
    pandapipes.create_pump_from_parameters(net, 0, 1, 'P4', [6.1, 5.8, 4],
                                           [0, 19, 83], 2)
    pump_input_create = list(net.pump.columns)
    assert pump_input == pump_input_create, "Input does not equal create-table"

    pandapipes.add_new_component(net, CirculationPumpMass)
    pumpcircmass_input = list(copy.deepcopy(net.circ_pump_mass.columns))
    pandapipes.create_circ_pump_const_mass_flow(net,
                                                0,
                                                1,
                                                5,
                                                5,
                                                300,
                                                type='pt')
    pumpcircmass_input_create = list(net.circ_pump_mass.columns)
    assert pumpcircmass_input == pumpcircmass_input_create, "Input does not equal create-table"

    pandapipes.add_new_component(net, CirculationPumpPressure)
    pumpcircpres_input = list(copy.deepcopy(net.circ_pump_pressure.columns))
    pandapipes.create_circ_pump_const_pressure(net, 0, 1, 5, 2, 300, type='pt')
    pumpcircpres_input_create = list(net.circ_pump_pressure.columns)
    assert pumpcircpres_input == pumpcircpres_input_create, "Input does not equal create-table"

    pandapipes.add_new_component(net, Valve)
    valve_input = list(copy.deepcopy(net.valve.columns))
    pandapipes.create_valve(net, 0, 1, diameter_m=0.1, opened=False)
    valve_input_create = list(net.valve.columns)
    assert valve_input == valve_input_create, "Input does not equal create-table"

    pandapipes.add_new_component(net, HeatExchanger)
    hex_input = list(copy.deepcopy(net.heat_exchanger.columns))
    pandapipes.create_heat_exchanger(net, 0, 1, 0.2, qext_w=20000)
    hex_input_create = list(net.heat_exchanger.columns)
    assert hex_input == hex_input_create, "Input does not equal create-table"
예제 #3
0
def net_plotting():
    net = pandapipes.create_empty_network(fluid="lgas")

    # create network elements, such as junctions, external grid, pipes, valves, sinks and sources
    junction1 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15,
                                           name="Connection to External Grid", geodata=(0, 0))
    junction2 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 2",
                                           geodata=(2, 0))
    junction3 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 3",
                                           geodata=(7, 4))
    junction4 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 4",
                                           geodata=(7, -4))
    junction5 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 5",
                                           geodata=(5, 3))
    junction6 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 6",
                                           geodata=(5, -3))
    junction7 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 7",
                                           geodata=(9, -4))
    junction8 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 7",
                                           geodata=(9, 4))

    pandapipes.create_ext_grid(net, junction=junction1, p_bar=1.1, t_k=293.15,
                               name="Grid Connection")
    pandapipes.create_pipe_from_parameters(net, from_junction=junction1, to_junction=junction2,
                                           length_km=10, diameter_m=0.3, name="Pipe 1",
                                           geodata=[(0, 0), (2, 0)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction2, to_junction=junction3,
                                           length_km=2, diameter_m=0.3, name="Pipe 2",
                                           geodata=[(2, 0), (2, 4), (7, 4)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction2, to_junction=junction4,
                                           length_km=2.5, diameter_m=0.3, name="Pipe 3",
                                           geodata=[(2, 0), (2, -4), (7, -4)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction3, to_junction=junction5,
                                           length_km=1, diameter_m=0.3, name="Pipe 4",
                                           geodata=[(7, 4), (7, 3), (5, 3)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction4, to_junction=junction6,
                                           length_km=1, diameter_m=0.3, name="Pipe 5",
                                           geodata=[(7, -4), (7, -3), (5, -3)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction7, to_junction=junction8,
                                           length_km=1, diameter_m=0.3, name="Pipe 6",
                                           geodata=[(9, -4), (9, 4)])
    pandapipes.create_valve(net, from_junction=junction5, to_junction=junction6, diameter_m=0.05,
                            opened=True)
    pandapipes.create_heat_exchanger(net, junction3, junction8, diameter_m=0.3, qext_w=20000)
    pandapipes.create_sink(net, junction=junction4, mdot_kg_per_s=0.545, name="Sink 1")
    pandapipes.create_source(net, junction=junction3, mdot_kg_per_s=0.234)
    pandapipes.create_pump_from_parameters(net, junction4, junction7, 'P1')

    return net
예제 #4
0
def test_create_pump_from_parameters(create_empty_net):
    net = copy.deepcopy(create_empty_net)
    pandapipes.create_junction(net, 1, 293, index=8, geodata=(0, 1))
    pandapipes.create_junction(net, 1, 293, index=9, geodata=(2, 2))
    pandapipes.create_pump_from_parameters(net,
                                           8,
                                           9,
                                           "pump1",
                                           pressure_list=[0, 1, 2, 3],
                                           flowrate_list=[0, 1, 2, 3],
                                           reg_polynomial_degree=1,
                                           index=2)

    try:
        pandapipes.create_pump_from_parameters(net,
                                               8,
                                               9,
                                               "pump1",
                                               pressure_list=[0, 1, 2, 3],
                                               flowrate_list=[0, 1, 2, 3],
                                               reg_polynomial_degree=1,
                                               index=2)
        assert False, "Shouldn't make pump, index exists!"
    except UserWarning:
        assert True
    try:
        pandapipes.create_pump_from_parameters(net,
                                               8,
                                               10,
                                               "pump1",
                                               pressure_list=[0, 1, 2, 3],
                                               flowrate_list=[0, 1, 2, 3],
                                               reg_polynomial_degree=1,
                                               index=2)
        assert False, "Shouldn't make pump, non-existent to_junction!"
    except UserWarning:
        assert True
    try:
        pandapipes.create_pump_from_parameters(net,
                                               8,
                                               9,
                                               "pump1",
                                               pressure_list=[0, 1, 2, 3],
                                               flowrate_list=[0, 1, 2, 3],
                                               reg_polynomial_degree=1,
                                               geodata=[(0, 1), (1, 1),
                                                        (2, 2)])
        assert False, "Shouldn't make pump, geodata not possible!"
    except ValueError:
        assert True
예제 #5
0
def test_create_pump_from_parameters(create_empty_net):
    net = copy.deepcopy(create_empty_net)
    pandapipes.create_junction(net, 1, 293, index=8, geodata=(0, 1))
    pandapipes.create_junction(net, 1, 293, index=9, geodata=(2, 2))
    pandapipes.create_pump_from_parameters(net,
                                           8,
                                           9,
                                           "pump1",
                                           pressure_list=[0, 1, 2, 3],
                                           flowrate_list=[0, 1, 2, 3],
                                           reg_polynomial_degree=1,
                                           index=2)

    with pytest.raises(UserWarning):
        pandapipes.create_pump_from_parameters(net,
                                               8,
                                               9,
                                               "pump1",
                                               pressure_list=[0, 1, 2, 3],
                                               flowrate_list=[0, 1, 2, 3],
                                               reg_polynomial_degree=1,
                                               index=2)
    with pytest.raises(UserWarning):
        pandapipes.create_pump_from_parameters(net,
                                               8,
                                               10,
                                               "pump1",
                                               pressure_list=[0, 1, 2, 3],
                                               flowrate_list=[0, 1, 2, 3],
                                               reg_polynomial_degree=1,
                                               index=2)
    with pytest.raises(ValueError):
        pandapipes.create_pump_from_parameters(net,
                                               8,
                                               9,
                                               "pump1",
                                               pressure_list=[0, 1, 2, 3],
                                               flowrate_list=[0, 1, 2, 3],
                                               reg_polynomial_degree=1,
                                               geodata=[(0, 1), (1, 1),
                                                        (2, 2)])
예제 #6
0
def test_collection_lengths():
    net = pandapipes.create_empty_network(add_stdtypes=False)
    d = 40e-3

    j1 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(0, 0))
    j2 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(2, 0))
    j3 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(4, 2))
    j4 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(4, 0))
    j5 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(4, -2))
    j6 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(6, 0))
    j7 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(8, 0))
    j8 = pandapipes.create_junction(net,
                                    pn_bar=5,
                                    tfluid_k=293.15,
                                    geodata=(10, 0))

    pandapipes.create_ext_grid(net, j1, p_bar=5, t_k=293.15)
    pandapipes.create_sink(net, j5, mdot_kg_per_s=0.5)
    pandapipes.create_sink(net, j6, mdot_kg_per_s=0.5)
    pandapipes.create_sink(net, j8, mdot_kg_per_s=0.5)

    pandapipes.create_pipe_from_parameters(net,
                                           j1,
                                           j2,
                                           0.1,
                                           diameter_m=d,
                                           k_mm=0.1,
                                           geodata=[(0, 0), (2, 0)])
    pandapipes.create_valve(net,
                            j2,
                            j3,
                            diameter_m=d,
                            opened=True,
                            loss_coefficient=5e3)
    pandapipes.create_valve(net,
                            j2,
                            j4,
                            diameter_m=d,
                            opened=False,
                            loss_coefficient=0.01)
    pandapipes.create_valve(net,
                            j2,
                            j5,
                            diameter_m=d,
                            opened=False,
                            loss_coefficient=0.01)
    pandapipes.create_pipe_from_parameters(net,
                                           j3,
                                           j6,
                                           0.1,
                                           diameter_m=d,
                                           k_mm=0.1,
                                           geodata=[(4, 2), (6, 2), (6, 0)])
    pandapipes.create_pipe_from_parameters(net,
                                           j4,
                                           j6,
                                           0.2,
                                           diameter_m=d,
                                           k_mm=0.1,
                                           geodata=[(4, 0), (6, 0)])
    pandapipes.create_pipe_from_parameters(net,
                                           j5,
                                           j6,
                                           0.2,
                                           diameter_m=d,
                                           k_mm=0.1,
                                           geodata=[(4, -2), (6, -2), (6, 0)])
    pandapipes.create_heat_exchanger(net, j6, j7, d, qext_w=20000)
    pandapipes.create_pump_from_parameters(net, j7, j8, 'P1')

    pipe_coll_direct = plot.create_pipe_collection(net,
                                                   use_junction_geodata=True)
    pipe_coll_real = plot.create_pipe_collection(net)
    assert np.all(
        pipe_coll_direct.indices.astype(np.int64) ==
        net.pipe.index.values.astype(np.int64))
    assert len(pipe_coll_direct.get_paths()) == len(net.pipe)
    assert all([len(p) == 2 for p in pipe_coll_direct.get_paths()])
    assert all([
        len(p) == len(net.pipe_geodata.coords.iloc[i])
        for i, p in enumerate(pipe_coll_real.get_paths())
    ])

    junction_coll = plot.create_junction_collection(net)
    assert np.all(
        junction_coll.node_indices.astype(np.int64) ==
        net.junction.index.values.astype(np.int64))
    assert len(junction_coll.get_paths()) == len(net.junction)

    valve_coll_patches, valve_coll_lines = plot.create_valve_collection(net)
    assert len(valve_coll_patches.get_paths()) == 2 * len(net.valve)
    assert len(valve_coll_lines.get_paths()) == 2 * len(net.valve)

    pump_coll_patches, pump_coll_lines = plot.create_pump_collection(net)
    assert len(pump_coll_patches.get_paths()) == len(net.pump)
    assert len(pump_coll_lines.get_paths()) == 4 * len(net.pump)

    hex_coll_patches, hex_coll_lines = plot.create_heat_exchanger_collection(
        net)
    assert len(hex_coll_patches.get_paths()) == 2 * len(net.heat_exchanger)
    assert len(hex_coll_lines.get_paths()) == 2 * len(net.heat_exchanger)
예제 #7
0
def create_base_net(oos, additional_pumps=True):
    net = pandapipes.create_empty_network(fluid="lgas")

    # create network elements, such as junctions, external grid, pipes, valves, sinks and sources
    junction1 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, in_service=not oos,
                                           name="Connection to External Grid", geodata=(0, 0))
    junction2 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 2",
                                           geodata=(2, 0), in_service=not oos)
    junction3 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 3",
                                           geodata=(7, 4), in_service=not oos)
    junction4 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 4",
                                           geodata=(7, -4), in_service=not oos)
    junction5 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 5",
                                           geodata=(5, 3), in_service=not oos)
    junction6 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 6",
                                           geodata=(5, -3))
    junction7 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 7",
                                           geodata=(9, -4))
    junction8 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 8",
                                           geodata=(9, 4))
    junction9 = pandapipes.create_junction(net, pn_bar=1.05, tfluid_k=293.15, name="Junction 9",
                                           geodata=(9, 0))

    pandapipes.create_ext_grid(net, junction=junction1, p_bar=1.1, t_k=293.15,
                               name="Grid Connection")
    pandapipes.create_pipe_from_parameters(net, from_junction=junction1, to_junction=junction2,
                                           length_km=10, diameter_m=0.3, name="Pipe 1",
                                           geodata=[(0, 0), (2, 0)], in_service=not oos)
    pandapipes.create_pipe_from_parameters(net, from_junction=junction2, to_junction=junction3,
                                           length_km=2, diameter_m=0.3, name="Pipe 2",
                                           geodata=[(2, 0), (2, 4), (7, 4)], in_service=not oos)
    pandapipes.create_pipe_from_parameters(net, from_junction=junction2, to_junction=junction4,
                                           length_km=2.5, diameter_m=0.3, name="Pipe 3",
                                           geodata=[(2, 0), (2, -4), (7, -4)], in_service=not oos)
    pandapipes.create_pipe_from_parameters(net, from_junction=junction3, to_junction=junction5,
                                           length_km=1, diameter_m=0.3, name="Pipe 4",
                                           geodata=[(7, 4), (7, 3), (5, 3)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction4, to_junction=junction6,
                                           length_km=1, diameter_m=0.3, name="Pipe 5",
                                           geodata=[(7, -4), (7, -3), (5, -3)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction7, to_junction=junction8,
                                           length_km=1, diameter_m=0.3, name="Pipe 6",
                                           geodata=[(9, -4), (9, 0)])
    pandapipes.create_pipe_from_parameters(net, from_junction=junction7, to_junction=junction8,
                                           length_km=1, diameter_m=0.3, name="Pipe 7",
                                           geodata=[(9, 0), (9, 4)])

    pandapipes.create_valve(net, from_junction=junction5, to_junction=junction6, diameter_m=0.05,
                            opened=True)
    pandapipes.create_heat_exchanger(net, junction3, junction8, diameter_m=0.3, qext_w=20000)
    pandapipes.create_sink(net, junction=junction4, mdot_kg_per_s=0.545, name="Sink 1")
    pandapipes.create_source(net, junction=junction3, mdot_kg_per_s=0.234)
    pandapipes.create_pump_from_parameters(net, junction4, junction7, 'P1')

    if additional_pumps:
        pandapipes.create_circ_pump_const_mass_flow(net, junction9, junction5, 1.05, 1)
        pandapipes.create_circ_pump_const_pressure(net, junction9, junction6, 1.05, 0.5)

    if oos:
        pandapipes.create_ext_grid(net, junction=junction1, p_bar=1.1, t_k=293.15,
                                   name="Grid Connection", in_service=False)
        pandapipes.create_heat_exchanger(net, junction3, junction8, diameter_m=0.3, qext_w=20000,
                                         in_service=False)
        pandapipes.create_sink(net, junction=junction4, mdot_kg_per_s=0.545, name="Sink 2",
                               in_service=False)
        pandapipes.create_pump_from_parameters(net, junction4, junction7, 'P1', in_service=False)
        pandapipes.create_source(net, junction=junction3, mdot_kg_per_s=0.234, in_service=False)
        pandapipes.create_circ_pump_const_mass_flow(net, junction9, junction5, 1.05, 1,
                                                    in_service=False)
        pandapipes.create_circ_pump_const_pressure(net, junction9, junction6, 1.05, 0.5,
                                                   in_service=False)

    return net
예제 #8
0
def release_control_test_network():
    # empty net
    net = pp.create_empty_network("net", add_stdtypes=False)

    # fluid
    pp.create_fluid_from_lib(net, "water", overwrite=True)

    # junctions
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 0", index=None, in_service=True,
                       type="junction", geodata=None)
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 1")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 2")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 3")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 4")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 5")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 6")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 7")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 8")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 9")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 10")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 11")
    pp.create_junction(net, pn_bar=3, tfluid_k=293, height_m=0, name="Junction 12")

    # pipes
    pp.create_pipe_from_parameters(net, from_junction=0, to_junction=8, length_km=3, diameter_m=0.01, k_mm=1,
                                   loss_coefficient=0, sections=10, alpha_w_per_m2k=10, text_k=293,
                                   qext_w=0., name="Pipe 0", index=None, geodata=None, in_service=True, type="pipe")
    pp.create_pipe_from_parameters(net, 9, 2, length_km=6, diameter_m=0.075, k_mm=.1, sections=10,
                                   alpha_w_per_m2k=3,
                                   name="Pipe 1")
    pp.create_pipe_from_parameters(net, 2, 12, length_km=5, diameter_m=0.06, k_mm=.1, sections=10,
                                   alpha_w_per_m2k=20,
                                   name="Pipe 2")
    pp.create_pipe_from_parameters(net, 4, 12, length_km=0.1, diameter_m=0.07, k_mm=.1, sections=10,
                                   alpha_w_per_m2k=2,
                                   name="Pipe 3")
    pp.create_pipe_from_parameters(net, 5, 3, length_km=1, diameter_m=0.09, k_mm=.1, sections=10, alpha_w_per_m2k=3,
                                   name="Pipe 4")
    pp.create_pipe_from_parameters(net, 4, 11, length_km=2.5, diameter_m=0.08, k_mm=.1, sections=10,
                                   alpha_w_per_m2k=15,
                                   name="Pipe 5")
    pp.create_pipe_from_parameters(net, 7, 6, length_km=4.5, diameter_m=0.085, k_mm=.1, sections=10,
                                   alpha_w_per_m2k=2.5, name="Pipe 6")
    pp.create_pipe_from_parameters(net, 1, 7, length_km=4, diameter_m=0.03, k_mm=.1, sections=10, alpha_w_per_m2k=1,
                                   name="Pipe 7")

    # external grids
    pp.create_ext_grid(net, junction=0, p_bar=3, t_k=300, name="External Grid 0", in_service=True, index=None,
                       type="pt")
    pp.create_ext_grid(net, 1, p_bar=5, t_k=350, name="External Grid 1", type="pt")

    # sinks
    pp.create_sink(net, junction=2, mdot_kg_per_s=0.2, scaling=1., name="Sink 0", index=None, in_service=True,
                   type="sink")
    pp.create_sink(net, 3, mdot_kg_per_s=0.1, name="Sink 1")
    pp.create_sink(net, 4, mdot_kg_per_s=0.5, name="Sink 2")
    pp.create_sink(net, 5, mdot_kg_per_s=0.07, name="Sink 3")
    pp.create_sink(net, 6, mdot_kg_per_s=0.09, name="Sink 4")
    pp.create_sink(net, 7, mdot_kg_per_s=0.1, name="Sink 5")

    # sources
    pp.create_source(net, junction=8, mdot_kg_per_s=0.1, scaling=1., name="Source 0", index=None, in_service=True,
                     type="source")
    pp.create_source(net, junction=9, mdot_kg_per_s=0.03, name="Source 1")
    pp.create_source(net, junction=10, mdot_kg_per_s=0.04, name="Source 2")
    pp.create_source(net, junction=11, mdot_kg_per_s=0.09, name="Source 3")

    # valves
    pp.create_valve(net, from_junction=8, to_junction=9, diameter_m=0.1, opened=True, loss_coefficient=0,
                    name="Valve 0", index=None, type="valve")
    pp.create_valve(net, 9, 4, diameter_m=0.05, opened=True, name="Valve 1")

    # pump
    pp.create_pump_from_parameters(net, from_junction=8, to_junction=3, new_std_type_name="Pump",
                                   pressure_list=[6.1, 5.8, 4],
                                   flowrate_list=[0, 19, 83], reg_polynomial_degree=2,
                                   poly_coefficents=None, name=None, index=None, in_service=True,
                                   type="pump")

    # circulation pump mass
    pp.create_circ_pump_const_mass_flow(net, from_junction=3, to_junction=4, p_bar=6, mdot_kg_per_s=1,
                                        t_k=290, name="Circ. Pump Mass", index=None, in_service=True,
                                        type="pt")

    # circulation pump pressure
    pp.create_circ_pump_const_pressure(net, from_junction=11, to_junction=5, p_bar=5, plift_bar=2,
                                       t_k=290, name="Circ. Pump Pressure", index=None, in_service=True, type="pt")

    # heat exchanger
    pp.create_heat_exchanger(net, from_junction=10, to_junction=6, diameter_m=0.08, qext_w=50, loss_coefficient=0,
                             name="Heat Exchanger 0", index=None, in_service=True, type="heat_exchanger")
    pp.create_heat_exchanger(net, from_junction=4, to_junction=10, diameter_m=0.08, qext_w=28000,
                             loss_coefficient=0,
                             name="Heat Exchanger 1", index=None, in_service=True, type="heat_exchanger")
    # time series
    profiles_sink = pd.read_csv(os.path.join(pp_dir, 'test', 'api', 'release_cycle',
                                             'release_control_test_sink_profiles.csv'), index_col=0)
    profiles_source = pd.read_csv(os.path.join(pp_dir, 'test', 'api', 'release_cycle',
                                               'release_control_test_source_profiles.csv'), index_col=0)
    ds_sink = DFData(profiles_sink)
    ds_source = DFData(profiles_source)

    const_sink = control.ConstControl(net, element='sink', variable='mdot_kg_per_s',
                                      element_index=net.sink.index.values, data_source=ds_sink,
                                      profile_name=net.sink.index.values.astype(str))
    const_source = control.ConstControl(net, element='source', variable='mdot_kg_per_s',
                                        element_index=net.source.index.values,
                                        data_source=ds_source,
                                        profile_name=net.source.index.values.astype(str))

    const_sink.initial_run = False
    const_source.initial_run = False

    pp.pipeflow(net)

    pp.to_json(net, os.path.join(path, 'example_%s.json' % pp.__version__))

    return net