280 lines
7.6 KiB
Python
280 lines
7.6 KiB
Python
"""
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ThermalBoundary module
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2022 Concordia CERC group
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Project Coder Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
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Code contributors: Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
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"""
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import uuid
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from typing import List, Union, TypeVar
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from helpers.configuration_helper import ConfigurationHelper as ch
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from city_model_structure.building_demand.layer import Layer
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from city_model_structure.building_demand.thermal_opening import ThermalOpening
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from city_model_structure.building_demand.thermal_zone import ThermalZone
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Surface = TypeVar('Surface')
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class ThermalBoundary:
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"""
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ThermalBoundary class
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"""
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def __init__(self, parent_surface, opaque_area, windows_areas):
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self._parent_surface = parent_surface
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self._opaque_area = opaque_area
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self._windows_areas = windows_areas
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self._id = None
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self._thermal_zones = None
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self._thermal_openings = None
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self._layers = None
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self._he = ch().convective_heat_transfer_coefficient_exterior
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self._hi = ch().convective_heat_transfer_coefficient_interior
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self._u_value = None
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self._construction_name = None
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self._thickness = None
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self._internal_surface = None
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self._window_ratio = None
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self._window_ratio_is_calculated = False
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@property
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def id(self):
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"""
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Get thermal zone id, a universally unique identifier randomly generated
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:return: str
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"""
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if self._id is None:
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self._id = uuid.uuid4()
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return self._id
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@property
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def parent_surface(self) -> Surface:
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"""
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Get the surface that belongs to the thermal boundary
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:return: Surface
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"""
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return self._parent_surface
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@property
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def thermal_zones(self) -> List[ThermalZone]:
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"""
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Get the thermal zones delimited by the thermal boundary
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:return: [ThermalZone]
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"""
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return self._thermal_zones
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@thermal_zones.setter
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def thermal_zones(self, value):
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"""
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Get the thermal zones delimited by the thermal boundary
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:param value: [ThermalZone]
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"""
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self._thermal_zones = value
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@property
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def opaque_area(self):
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"""
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Get the thermal boundary area in square meters
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:return: float
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"""
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return float(self._opaque_area)
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@property
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def thickness(self):
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"""
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Get the thermal boundary thickness in meters
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:return: float
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"""
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if self._thickness is None:
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self._thickness = 0.0
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if self.layers is not None:
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for layer in self.layers:
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if not layer.material.no_mass:
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self._thickness += layer.thickness
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return self._thickness
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@property
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def thermal_openings(self) -> Union[None, List[ThermalOpening]]:
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"""
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Get thermal boundary thermal openings
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:return: None or [ThermalOpening]
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"""
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if self._thermal_openings is None:
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if self.window_ratio is not None:
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if self.window_ratio == 0:
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self._thermal_openings = []
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else:
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thermal_opening = ThermalOpening()
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if self.window_ratio == 1:
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_area = self.opaque_area
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else:
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_area = self.opaque_area * self.window_ratio / (1-self.window_ratio)
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thermal_opening.area = _area
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self._thermal_openings = [thermal_opening]
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else:
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if len(self.windows_areas) > 0:
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self._thermal_openings = []
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for window_area in self.windows_areas:
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thermal_opening = ThermalOpening()
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thermal_opening.area = window_area
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self._thermal_openings.append(thermal_opening)
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else:
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self._thermal_openings = []
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return self._thermal_openings
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@property
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def construction_name(self) -> Union[None, str]:
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"""
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Get construction name
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:return: None or str
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"""
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return self._construction_name
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@construction_name.setter
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def construction_name(self, value):
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"""
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Set construction name
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:param value: str
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"""
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if value is not None:
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self._construction_name = str(value)
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@property
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def layers(self) -> List[Layer]:
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"""
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Get thermal boundary layers
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:return: [Layers]
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"""
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return self._layers
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@layers.setter
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def layers(self, value):
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"""
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Set thermal boundary layers
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:param value: [Layer]
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"""
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self._layers = value
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@property
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def type(self):
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"""
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Get thermal boundary surface type
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:return: str
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"""
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return self.parent_surface.type
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@property
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def window_ratio(self) -> Union[None, float]:
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"""
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Get thermal boundary window ratio
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It returns the window ratio calculated as the total windows' areas in a wall divided by
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the total (opaque + transparent) area of that wall if windows are defined in the geometry imported.
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If not, it returns the window ratio imported from an external source (e.g. construction library, manually assigned).
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If none of those sources are available, it returns None.
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:return: float
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"""
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if self.windows_areas is not None:
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if not self._window_ratio_is_calculated:
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_calculated = True
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if len(self.windows_areas) == 0:
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self._window_ratio = 0
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else:
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total_window_area = 0
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for window_area in self.windows_areas:
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total_window_area += window_area
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self._window_ratio = total_window_area / (self.opaque_area + total_window_area)
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return self._window_ratio
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@window_ratio.setter
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def window_ratio(self, value):
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"""
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Set thermal boundary window ratio
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:param value: str
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"""
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if self._window_ratio_is_calculated:
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raise ValueError('Window ratio cannot be assigned when the windows are defined in the geometry.')
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self._window_ratio = float(value)
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@property
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def windows_areas(self) -> [float]:
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"""
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Get windows areas
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:return: [float]
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"""
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return self._windows_areas
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@property
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def u_value(self) -> Union[None, float]:
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"""
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Get thermal boundary U-value in W/m2K
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internal and external convective coefficient in W/m2K values, can be configured at configuration.ini
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:return: None or float
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"""
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if self._u_value is None:
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h_i = self.hi
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h_e = self.he
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r_value = 1.0/h_i + 1.0/h_e
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try:
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for layer in self.layers:
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if layer.material.no_mass:
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r_value += float(layer.material.thermal_resistance)
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else:
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r_value = r_value + float(layer.material.conductivity) / float(layer.thickness)
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self._u_value = 1.0/r_value
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except TypeError:
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raise Exception('Constructions layers are not initialized') from TypeError
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return self._u_value
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@u_value.setter
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def u_value(self, value):
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"""
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Set thermal boundary U-value in W/m2K
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:param value: float
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"""
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if value is not None:
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self._u_value = float(value)
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@property
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def hi(self) -> Union[None, float]:
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"""
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Get internal convective heat transfer coefficient (W/m2K)
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:return: None or float
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"""
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return self._hi
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@hi.setter
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def hi(self, value):
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"""
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Set internal convective heat transfer coefficient (W/m2K)
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:param value: float
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"""
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if value is not None:
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self._hi = value
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@property
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def he(self) -> Union[None, float]:
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"""
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Get external convective heat transfer coefficient (W/m2K)
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:return: None or float
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"""
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return self._he
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@he.setter
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def he(self, value):
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"""
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Set external convective heat transfer coefficient (W/m2K)
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:param value: float
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"""
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if value is not None:
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self._he = value
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@property
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def internal_surface(self) -> Surface:
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"""
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Get the internal surface of the thermal boundary
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:return: Surface
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"""
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if self._internal_surface is None:
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self._internal_surface = self.parent_surface.inverse
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return self._internal_surface
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