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Merge pull request #533 from Theda-ISE/transient_heat_transfer_wops
Transient heat transfer wops
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pandapipes/component_models/dynamic_circulation_pump_component.py
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# Copyright (c) 2020-2022 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. | ||
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import numpy as np | ||
from numpy import dtype | ||
from operator import itemgetter | ||
from pandapipes.component_models.junction_component import Junction | ||
from pandapipes.component_models.abstract_models.circulation_pump import CirculationPump | ||
from pandapipes.component_models.component_toolbox import set_fixed_node_entries, update_fixed_node_entries | ||
from pandapipes.idx_node import PINIT, NODE_TYPE, P, EXT_GRID_OCCURENCE | ||
from pandapipes.pf.pipeflow_setup import get_lookup, get_net_option | ||
from pandapipes.idx_branch import STD_TYPE, VINIT, D, AREA, ACTIVE, LOSS_COEFFICIENT as LC, FROM_NODE, \ | ||
TINIT, PL, ACTUAL_POS, DESIRED_MV, RHO, TO_NODE, JAC_DERIV_DP, JAC_DERIV_DP1, JAC_DERIV_DV, LOAD_VEC_BRANCHES | ||
from pandapipes.idx_node import PINIT, PAMB, TINIT as TINIT_NODE, HEIGHT, RHO as RHO_node | ||
from pandapipes.constants import NORMAL_TEMPERATURE, NORMAL_PRESSURE, P_CONVERSION, GRAVITATION_CONSTANT | ||
from pandapipes.properties.fluids import get_fluid | ||
from pandapipes.component_models.component_toolbox import p_correction_height_air | ||
from pandapipes.component_models.component_toolbox import set_fixed_node_entries, \ | ||
get_mass_flow_at_nodes | ||
from pandapipes.pf.result_extraction import extract_branch_results_without_internals | ||
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try: | ||
import pandaplan.core.pplog as logging | ||
except ImportError: | ||
import logging | ||
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logger = logging.getLogger(__name__) | ||
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class DynamicCirculationPump(CirculationPump): | ||
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# class attributes | ||
kwargs = None | ||
prev_act_pos = None | ||
time_step = 0 | ||
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@classmethod | ||
def table_name(cls): | ||
return "dyn_circ_pump" | ||
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@classmethod | ||
def get_connected_node_type(cls): | ||
return Junction | ||
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@classmethod | ||
def active_identifier(cls): | ||
return "in_service" | ||
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@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. | ||
""" | ||
# Sets the discharge pressure, otherwise known as the starting node in the system | ||
dyn_circ_pump, press = super().create_pit_node_entries(net, node_pit) | ||
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# SET SUCTION PRESSURE | ||
junction = dyn_circ_pump[cls.from_to_node_cols()[0]].values | ||
p_in = dyn_circ_pump.p_static_bar.values | ||
set_fixed_node_entries(net, node_pit, junction, dyn_circ_pump.type.values, p_in, None, | ||
cls.get_connected_node_type(), "p") | ||
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@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. | ||
""" | ||
dyn_circ_pump_pit = super().create_pit_branch_entries(net, branch_pit) | ||
dyn_circ_pump_pit[:, ACTIVE] = False | ||
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@classmethod | ||
def plant_dynamics(cls, dt, desired_mv, dyn_pump_tbl): | ||
""" | ||
Takes in the desired valve position (MV value) and computes the actual output depending on | ||
equipment lag parameters. | ||
Returns Actual valve position | ||
""" | ||
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""" | ||
Takes in the desired valve position (MV value) and computes the actual output depending on | ||
equipment lag parameters. | ||
Returns Actual valve position | ||
""" | ||
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if dyn_pump_tbl.__contains__("time_const_s"): | ||
time_const_s = dyn_pump_tbl.time_const_s.values | ||
else: | ||
print("No actuator time constant set, default lag is now 5s.") | ||
time_const_s = 5 | ||
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a = np.divide(dt, time_const_s + dt) | ||
actual_pos = (1 - a) * cls.prev_act_pos + a * desired_mv | ||
cls.prev_act_pos = actual_pos | ||
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return actual_pos | ||
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# Issue with getting array values for different types of valves!! Assume all First Order! | ||
# if cls.kwargs.__contains__("act_dynamics"): | ||
# typ = cls.kwargs['act_dynamics'] | ||
# else: | ||
# # default to instantaneous | ||
# return desired_mv | ||
# | ||
# # linear | ||
# if typ == "l": | ||
# | ||
# # TODO: equation for linear | ||
# actual_pos = desired_mv | ||
# | ||
# # first order | ||
# elif typ == "fo": | ||
# | ||
# a = np.divide(dt, cls.kwargs['time_const_s'] + dt) | ||
# actual_pos = (1 - a) * cls.prev_act_pos + a * desired_mv | ||
# | ||
# cls.prev_act_pos = actual_pos | ||
# | ||
# # second order | ||
# elif typ == "so": | ||
# # TODO: equation for second order | ||
# actual_pos = desired_mv | ||
# | ||
# else: | ||
# # instantaneous - when incorrect option selected | ||
# actual_pos = desired_mv | ||
# | ||
# return actual_pos | ||
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@classmethod | ||
def adaption_before_derivatives_hydraulic(cls, net, branch_pit, node_pit, idx_lookups, options): | ||
dt = net['_options']['dt'] | ||
circ_pump_tbl = net[cls.table_name()] | ||
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" | ||
return_junctions = circ_pump_tbl[fn_col].values | ||
return_node = junction_lookup[return_junctions] | ||
rho = node_pit[return_node, RHO_node] | ||
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) | ||
q_kg_s = - (sum_mass_flows / counts)[inverse_nodes] | ||
vol_m3_s = np.divide(q_kg_s, rho) | ||
vol_m3_h = vol_m3_s * 3600 | ||
desired_mv = circ_pump_tbl.desired_mv.values | ||
cur_actual_pos = circ_pump_tbl.actual_pos.values | ||
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#if not np.isnan(desired_mv) and get_net_option(net, "time_step") == cls.time_step: | ||
if get_net_option(net, "time_step") == cls.time_step: | ||
# a controller timeseries is running | ||
actual_pos = cls.plant_dynamics(dt, desired_mv, circ_pump_tbl) | ||
# Account for nan's when FCE are in manual | ||
update_pos = np.where(np.isnan(actual_pos)) | ||
actual_pos[update_pos] = cur_actual_pos[update_pos] | ||
circ_pump_tbl.actual_pos = actual_pos | ||
cls.time_step += 1 | ||
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else: # Steady state analysis | ||
actual_pos = circ_pump_tbl.actual_pos.values | ||
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std_types_lookup = np.array(list(net.std_types['dynamic_pump'].keys())) | ||
std_type, pos = np.where(net[cls.table_name()]['std_type'].values | ||
== std_types_lookup[:, np.newaxis]) | ||
std_types = np.array(list(net.std_types['dynamic_pump'].keys()))[std_type] | ||
fcts = itemgetter(*std_types)(net['std_types']['dynamic_pump']) | ||
fcts = [fcts] if not isinstance(fcts, tuple) else fcts | ||
m_head = np.array(list(map(lambda x, y, z: x.get_m_head(y, z), fcts, vol_m3_s, actual_pos))) # m head | ||
prsr_lift = np.divide((rho * GRAVITATION_CONSTANT * m_head), P_CONVERSION)[0] # bar | ||
circ_pump_tbl.p_lift = prsr_lift | ||
circ_pump_tbl.m_head = m_head | ||
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# Now: Update the Discharge pressure node (Also known as the starting PT node) | ||
# And the discharge temperature from the suction temperature (neglecting pump temp) | ||
circ_pump_tbl = net[cls.table_name()][net[cls.table_name()][cls.active_identifier()].values] | ||
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junction = net[cls.table_name()][cls.from_to_node_cols()[1]].values | ||
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# 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 | ||
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t_flow_k = node_pit[return_node, TINIT_NODE] | ||
p_static = circ_pump_tbl.p_static_bar.values | ||
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# update the 'FROM' node i.e: discharge node temperature and pressure lift updates | ||
update_fixed_node_entries(net, node_pit, junction, circ_pump_tbl.type.values, (prsr_lift + p_static), t_flow_k, | ||
cls.get_connected_node_type(), "pt") | ||
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@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", "desired_mv", "actual_pos", "p_lift", "m_head", "rho", "t_from_k", | ||
"t_to_k", "p_static_bar", "p_flow_bar"], True | ||
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@classmethod | ||
def get_component_input(cls): | ||
""" | ||
:return: | ||
:rtype: | ||
""" | ||
return [("name", dtype(object)), | ||
("return_junction", "u4"), | ||
("flow_junction", "u4"), | ||
("p_flow_bar", "f8"), | ||
("t_flow_k", "f8"), | ||
("p_lift", "f8"), | ||
('m_head', "f8"), | ||
("p_static_bar", "f8"), | ||
("actual_pos", "f8"), | ||
("in_service", 'bool'), | ||
("std_type", dtype(object)), | ||
("type", dtype(object))] | ||
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@classmethod | ||
def calculate_temperature_lift(cls, net, pipe_pit, node_pit): | ||
pass | ||
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@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()] | ||
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if len(circ_pump_tbl) == 0: | ||
return | ||
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res_table = net["res_" + cls.table_name()] | ||
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branch_pit = net['_pit']['branch'] | ||
node_pit = net["_pit"]["node"] | ||
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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) | ||
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# 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] | ||
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return_junctions = circ_pump_tbl[fn_col].values | ||
return_node = junction_lookup[return_junctions] | ||
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#res_table["vdot_norm_m3_per_s"] = np.divide(- (sum_mass_flows / counts)[inverse_nodes], rho) | ||
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return_junctions = circ_pump_tbl[fn_col].values | ||
return_nodes = junction_lookup[return_junctions] | ||
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deltap_bar = node_pit[flow_nodes, PINIT] - node_pit[return_nodes, PINIT] | ||
res_table["p_static_bar"].values[in_service] = circ_pump_tbl.p_static_bar.values | ||
res_table["p_flow_bar"].values[in_service] = node_pit[flow_nodes, PINIT] | ||
res_table["deltap_bar"].values[in_service] = deltap_bar[in_service] | ||
res_table["t_from_k"].values[p_grids] = node_pit[return_node, TINIT] | ||
res_table["t_to_k"].values[p_grids] = node_pit[flow_nodes, TINIT] | ||
res_table["rho"].values[p_grids] = node_pit[return_node, RHO_node] | ||
res_table["p_lift"].values[p_grids] = circ_pump_tbl.p_lift.values | ||
res_table["m_head"].values[p_grids] = circ_pump_tbl.m_head.values | ||
res_table["actual_pos"].values[p_grids] = circ_pump_tbl.actual_pos.values | ||
res_table["desired_mv"].values[p_grids] = circ_pump_tbl.desired_mv.values |
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