CERC/peak_demands
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added ground values from epw file

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Pilar Monsalvete 2023-03-24 10:40:57 -04:00
parent f7df10cd50
commit 12d742ce73
3 changed files with 13 additions and 17 deletions
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11
loads_calculation.py
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@ -6,10 +6,7 @@ Project Coder Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
""" """
import helpers.constants as cte import hub.helpers.constants as cte
AIR_DENSITY = 1.293 # kg/m3
AIR_HEAT_CAPACITY = 1005.2 # J/kgK
class LoadsCalculation: class LoadsCalculation:
@ -44,12 +41,12 @@ class LoadsCalculation:
@staticmethod @staticmethod
def _get_load_ventilation(thermal_zone, internal_temperature, ambient_temperature): def _get_load_ventilation(thermal_zone, internal_temperature, ambient_temperature):
load_renovation_sensible = 0 load_renovation_sensible = 0
for usage in thermal_zone.usage_zones: for usage in thermal_zone.usages:
load_renovation_sensible += AIR_DENSITY * AIR_HEAT_CAPACITY * usage.mechanical_air_change \ load_renovation_sensible += cte.AIR_DENSITY * cte.AIR_HEAT_CAPACITY * usage.mechanical_air_change \
* thermal_zone.volume / cte.HOUR_TO_MINUTES / cte.MINUTES_TO_SECONDS \ * thermal_zone.volume / cte.HOUR_TO_MINUTES / cte.MINUTES_TO_SECONDS \
* (internal_temperature - ambient_temperature) * (internal_temperature - ambient_temperature)
load_infiltration_sensible = AIR_DENSITY * AIR_HEAT_CAPACITY * float(thermal_zone.infiltration_rate_system_off) \ load_infiltration_sensible = cte.AIR_DENSITY * cte.AIR_HEAT_CAPACITY * thermal_zone.infiltration_rate_system_off \
* thermal_zone.volume / cte.HOUR_TO_MINUTES / cte.MINUTES_TO_SECONDS \ * thermal_zone.volume / cte.HOUR_TO_MINUTES / cte.MINUTES_TO_SECONDS \
* (internal_temperature - ambient_temperature) * (internal_temperature - ambient_temperature)

5
peak_loads.py
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@ -7,7 +7,7 @@ Project Coder Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
from pathlib import Path from pathlib import Path
import helpers.constants as cte import hub.helpers.constants as cte
from loads_calculation import LoadsCalculation from loads_calculation import LoadsCalculation
@ -47,13 +47,12 @@ class PeakLoads:
def _workflow(self): def _workflow(self):
for building in self._city.buildings: for building in self._city.buildings:
ambient_temperature = building.external_temperature[cte.HOUR][self._weather_format] ambient_temperature = building.external_temperature[cte.HOUR][self._weather_format]
ground_temperature = 0 ground_temperature = building.ground_temperature[cte.YEAR]['2'][0]
heating_ambient_temperature = 100 heating_ambient_temperature = 100
cooling_ambient_temperature = -100 cooling_ambient_temperature = -100
heating_calculation_hour = -1 heating_calculation_hour = -1
cooling_calculation_hour = -1 cooling_calculation_hour = -1
for hour, temperature in enumerate(ambient_temperature): for hour, temperature in enumerate(ambient_temperature):
ground_temperature += temperature / 8760
if temperature < heating_ambient_temperature: if temperature < heating_ambient_temperature:
heating_ambient_temperature = temperature heating_ambient_temperature = temperature
heating_calculation_hour = hour heating_calculation_hour = hour

14
unittests/test_peak_loads_workflow.py
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@ -8,12 +8,12 @@ Project Coder Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
from pathlib import Path from pathlib import Path
from unittest import TestCase from unittest import TestCase
import pandas as pd import pandas as pd
import helpers.constants as cte import hub.helpers.constants as cte
from helpers.monthly_values import MonthlyValues from helpers.monthly_values import MonthlyValues
from imports.geometry_factory import GeometryFactory from hub.imports.geometry_factory import GeometryFactory
from imports.construction_factory import ConstructionFactory from hub.imports.construction_factory import ConstructionFactory
from imports.usage_factory import UsageFactory from hub.imports.usage_factory import UsageFactory
from imports.weather_factory import WeatherFactory from hub.imports.weather_factory import WeatherFactory
from peak_loads import PeakLoads from peak_loads import PeakLoads
@ -96,7 +96,7 @@ class TestPeakLoadsWorkflow(TestCase):
weather_file = 'CAN_PQ_Montreal.Intl.AP.716270_CWEC.epw' weather_file = 'CAN_PQ_Montreal.Intl.AP.716270_CWEC.epw'
weather_format = 'epw' weather_format = 'epw'
irradiance_format = 'sra' irradiance_format = 'sra'
construction_format = 'nrel' construction_format = 'nrcan'
usage_format = 'comnet' usage_format = 'nrcan'
self._enrich_city(city, weather_file, weather_format, irradiance_format, construction_format, usage_format) self._enrich_city(city, weather_file, weather_format, irradiance_format, construction_format, usage_format)
PeakLoads(city, outputs_path, weather_format, irradiance_format) PeakLoads(city, outputs_path, weather_format, irradiance_format)