120 lines
4.7 KiB
Python
120 lines
4.7 KiB
Python
"""
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Cooling and Heating peak loads module
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2023 Concordia CERC group
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Project Coder Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
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Code contributors: Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
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"""
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import math
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import hub.helpers.constants as cte
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from hub.helpers.peak_calculation.loads_calculation import LoadsCalculation
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_MONTH_STARTING_HOUR = [0, 744, 1416, 2160, 2880, 3624, 4344, 5088, 5832, 6552, 7296, 8016, math.inf]
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class PeakLoads:
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"""
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PeakLoads class
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"""
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def __init__(self, building=None):
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self._building = building
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def _can_be_calculated(self):
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levels_of_detail = self._building.level_of_detail
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can_be_calculated = True
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if levels_of_detail.geometry is None:
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can_be_calculated = False
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if levels_of_detail.geometry < 1:
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can_be_calculated = False
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if levels_of_detail.construction is None:
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can_be_calculated = False
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if levels_of_detail.construction < 1:
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can_be_calculated = False
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if levels_of_detail.usage is None:
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can_be_calculated = False
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if levels_of_detail.usage < 1:
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can_be_calculated = False
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if levels_of_detail.weather is None:
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can_be_calculated = False
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if levels_of_detail.weather < 2:
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can_be_calculated = False
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if levels_of_detail.surface_radiation is None:
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can_be_calculated = False
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if levels_of_detail.surface_radiation < 2:
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can_be_calculated = False
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return can_be_calculated
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@staticmethod
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def peak_loads_from_hourly(hourly_values):
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month = 1
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peaks = [0 for _ in range(12)]
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for i, value in enumerate(hourly_values):
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if _MONTH_STARTING_HOUR[month] <= i:
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month += 1
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if value > peaks[month-1]:
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peaks[month-1] = value
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return peaks
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@property
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def heating_peak_loads_from_methodology(self):
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if not self._can_be_calculated():
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return None
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monthly_heating_loads = []
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ambient_temperature = self._building.external_temperature[cte.HOUR]['epw']
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for month in range(0, 12):
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ground_temperature = self._building.ground_temperature[cte.MONTH]['2'][month]
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heating_ambient_temperature = 100
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start_hour = _MONTH_STARTING_HOUR[month]
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end_hour = 8760
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if month < 11:
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end_hour = _MONTH_STARTING_HOUR[month + 1]
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for hour in range(start_hour, end_hour):
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temperature = ambient_temperature[hour]
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if temperature < heating_ambient_temperature:
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heating_ambient_temperature = temperature
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loads = LoadsCalculation(self._building)
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heating_load_transmitted = loads.get_heating_transmitted_load(heating_ambient_temperature, ground_temperature)
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heating_load_ventilation_sensible = loads.get_heating_ventilation_load_sensible(heating_ambient_temperature)
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heating_load_ventilation_latent = 0
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heating_load = heating_load_transmitted + heating_load_ventilation_sensible + heating_load_ventilation_latent
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if heating_load < 0:
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heating_load = 0
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monthly_heating_loads.append(heating_load)
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return monthly_heating_loads
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@property
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def cooling_peak_loads_from_methodology(self):
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if not self._can_be_calculated():
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return None
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monthly_cooling_loads = []
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ambient_temperature = self._building.external_temperature[cte.HOUR]['epw']
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for month in range(0, 12):
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ground_temperature = self._building.ground_temperature[cte.MONTH]['2'][month]
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cooling_ambient_temperature = -100
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cooling_calculation_hour = -1
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start_hour = _MONTH_STARTING_HOUR[month]
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end_hour = 8760
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if month < 11:
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end_hour = _MONTH_STARTING_HOUR[month + 1]
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for hour in range(start_hour, end_hour):
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temperature = ambient_temperature[hour]
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if temperature > cooling_ambient_temperature:
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cooling_ambient_temperature = temperature
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cooling_calculation_hour = hour
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loads = LoadsCalculation(self._building)
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cooling_load_transmitted = loads.get_cooling_transmitted_load(cooling_ambient_temperature, ground_temperature)
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cooling_load_renovation_sensible = loads.get_cooling_ventilation_load_sensible(cooling_ambient_temperature)
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cooling_load_internal_gains_sensible = loads.get_internal_load_sensible()
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cooling_load_radiation = loads.get_radiation_load('sra', cooling_calculation_hour)
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cooling_load_sensible = cooling_load_transmitted + cooling_load_renovation_sensible - cooling_load_radiation \
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- cooling_load_internal_gains_sensible
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cooling_load_latent = 0
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cooling_load = cooling_load_sensible + cooling_load_latent
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if cooling_load > 0:
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cooling_load = 0
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monthly_cooling_loads.append(abs(cooling_load))
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return monthly_cooling_loads
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