/
circulation_pump.py
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/
circulation_pump.py
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# Copyright (c) 2020-2023 by Fraunhofer Institute for Energy Economics
# and Energy System Technology (IEE), Kassel, and University of Kassel. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
import numpy as np
from pandapipes.component_models.abstract_models.branch_wzerolength_models import \
BranchWZeroLengthComponent
from pandapipes.component_models.component_toolbox import set_fixed_node_entries, \
get_mass_flow_at_nodes
from pandapipes.idx_branch import D, AREA, ACTIVE
from pandapipes.idx_node import PINIT
from pandapipes.pf.pipeflow_setup import get_lookup
try:
import pandaplan.core.pplog as logging
except ImportError:
import logging
logger = logging.getLogger(__name__)
class CirculationPump(BranchWZeroLengthComponent):
@classmethod
def table_name(cls):
raise NotImplementedError
@classmethod
def get_component_input(cls):
raise NotImplementedError
@classmethod
def get_result_table(cls, net):
"""
:param net: The pandapipes network
:type net: pandapipesNet
:return: (columns, all_float) - the column names and whether they are all float type. Only
if False, returns columns as tuples also specifying the dtypes
:rtype: (list, bool)
"""
return ["mdot_flow_kg_per_s", "deltap_bar"], True
@classmethod
def active_identifier(cls):
raise NotImplementedError
@classmethod
def from_to_node_cols(cls):
return "return_junction", "flow_junction"
@classmethod
def get_connected_node_type(cls):
from pandapipes.component_models.junction_component import Junction
return Junction
@classmethod
def create_pit_node_entries(cls, net, node_pit):
"""
Function which creates pit node entries.
:param net: The pandapipes network
:type net: pandapipesNet
:param node_pit:
:type node_pit:
:return: No Output.
"""
circ_pump_tbl = net[cls.table_name()][net[cls.table_name()][cls.active_identifier()].values]
junction = net[cls.table_name()][cls.from_to_node_cols()[1]].values
# TODO: there should be a warning, if any p_bar value is not given or any of the types does
# not contain "p", as this should not be allowed for this component
press = circ_pump_tbl.p_flow_bar.values
set_fixed_node_entries(net, node_pit, junction, circ_pump_tbl.type.values, press,
circ_pump_tbl.t_flow_k.values, cls.get_connected_node_type())
return circ_pump_tbl, press
@classmethod
def create_pit_branch_entries(cls, net, branch_pit):
"""
Function which creates pit branch entries with a specific table.
:param net: The pandapipes network
:type net: pandapipesNet
:param branch_pit:
:type branch_pit:
:return: No Output.
"""
circ_pump_pit = super().create_pit_branch_entries(net, branch_pit)
circ_pump_pit[:, D] = 0.1
circ_pump_pit[:, AREA] = circ_pump_pit[:, D] ** 2 * np.pi / 4
circ_pump_pit[:, ACTIVE] = False
@classmethod
def calculate_temperature_lift(cls, net, pipe_pit, node_pit):
raise NotImplementedError
@classmethod
def extract_results(cls, net, options, branch_results, nodes_connected, branches_connected):
"""
Function that extracts certain results.
:param nodes_connected:
:type nodes_connected:
:param branches_connected:
:type branches_connected:
:param branch_results:
:type branch_results:
:param net: The pandapipes network
:type net: pandapipesNet
:param options:
:type options:
:return: No Output.
"""
circ_pump_tbl = net[cls.table_name()]
if len(circ_pump_tbl) == 0:
return
res_table = net["res_" + cls.table_name()]
branch_pit = net['_pit']['branch']
node_pit = net["_pit"]["node"]
junction_lookup = get_lookup(net, "node", "index")[
cls.get_connected_node_type().table_name()]
fn_col, tn_col = cls.from_to_node_cols()
# get indices in internal structure for flow_junctions in circ_pump tables which are
# "active"
flow_junctions = circ_pump_tbl[tn_col].values
flow_nodes = junction_lookup[flow_junctions]
in_service = circ_pump_tbl.in_service.values
p_grids = np.isin(circ_pump_tbl.type.values, ["p", "pt"]) & in_service
sum_mass_flows, inverse_nodes, counts = get_mass_flow_at_nodes(net, node_pit, branch_pit,
flow_nodes[p_grids], cls)
# positive results mean that the circ_pump feeds in, negative means that the ext grid
# extracts (like a load)
res_table["mdot_flow_kg_per_s"].values[p_grids] = - (sum_mass_flows / counts)[inverse_nodes]
return_junctions = circ_pump_tbl[fn_col].values
return_nodes = junction_lookup[return_junctions]
deltap_bar = node_pit[flow_nodes, PINIT] - node_pit[return_nodes, PINIT]
res_table["deltap_bar"].values[in_service] = deltap_bar[in_service]