def test_CoolingRequired(self):
t_out = 25
t_m_prev = 24
# Internal heat gains, in Watts
internal_gains = 10
# Solar heat gains after transmitting through the winow, in Watts
solar_gains = 4000
# Illuminance after transmitting through the window
ill = 44000 # Lumens
# Occupancy for the timestep [people/hour/square_meter]
occupancy = 0.1
# Set Zone Parameters
Office = Zone(
window_area=13.5,
walls_area=15.19 - 13.5,
floor_area=34.3,
room_vol=106.33,
total_internal_area=142.38,
lighting_load=11.7,
lighting_control=300,
lighting_utilisation_factor=0.45,
lighting_maintenance_factor=0.9,
u_walls=0.2,
u_windows=1.1,
ach_vent=1.5,
ach_infl=0.5,
ventilation_efficiency=0,
thermal_capacitance_per_floor_area=165000,
t_set_heating=20,
t_set_cooling=26,
max_cooling_energy_per_floor_area=-12,
max_heating_energy_per_floor_area=12,
heating_supply_system=supply_system.DirectHeater,
cooling_supply_system=supply_system.DirectCooler,
heating_emission_system=emission_system.AirConditioning,
cooling_emission_system=emission_system.AirConditioning,
)
Office.solve_energy(internal_gains, solar_gains, t_out, t_m_prev)
Office.solve_lighting(ill, occupancy)
self.assertEqual(round(Office.energy_demand, 2), -264.75)
self.assertEqual(round(Office.cooling_sys_electricity, 2), 264.75)
self.assertEqual(round(Office.heating_sys_electricity, 2), 0)
self.assertEqual(round(Office.t_m, 2), 25.15)
self.assertTrue(Office.has_cooling_demand)
self.assertEqual(Office.lighting_demand, 0)
Altitude, Azimuth = Zurich.calc_sun_position(
latitude_deg=47.480, longitude_deg=8.536, year=2015, hoy=hour)
SouthWindow.calc_solar_gains(sun_altitude=Altitude, sun_azimuth=Azimuth,
normal_direct_radiation=Zurich.weather_data[
'dirnorrad_Whm2'][hour],
horizontal_diffuse_radiation=Zurich.weather_data['difhorrad_Whm2'][hour])
SouthWindow.calc_illuminance(sun_altitude=Altitude, sun_azimuth=Azimuth,
normal_direct_illuminance=Zurich.weather_data[
'dirnorillum_lux'][hour],
horizontal_diffuse_illuminance=Zurich.weather_data['difhorillum_lux'][hour])
Office.solve_energy(internal_gains=internal_gains,
solar_gains=SouthWindow.solar_gains,
t_out=t_out,
t_m_prev=t_m_prev)
Office.solve_lighting(
illuminance=SouthWindow.transmitted_illuminance, occupancy=occupancy)
# Set the previous temperature for the next time step
t_m_prev = Office.t_m_next
HeatingDemand.append(Office.heating_demand)
HeatingEnergy.append(Office.heating_energy)
CoolingDemand.append(Office.cooling_demand)
CoolingEnergy.append(Office.cooling_energy)
ElectricityOut.append(Office.electricity_out)
IndoorAir.append(Office.t_air)
OutsideTemp.append(t_out)
# Example Inputs t_air = 10 t_m_prev = 22 internal_gains = 10 # Internal heat gains, in Watts # Solar heat gains after transmitting through the winow [Watts] solar_gains = 2000 ill = 44000 # Illuminance after transmitting through the window [Lumens] occupancy = 0.1 # Occupancy for the timestep [people/hour/square_meter] # Initialise an instance of the Zone. Empty brackets take on the # default parameters. See ZonePhysics.py to see the default values Office = Zone() # Solve for Zone energy Office.solve_energy(internal_gains, solar_gains, t_air, t_m_prev) # Solve for Zone lighting Office.solve_lighting(ill, occupancy) print(Office.t_m) # Printing Room Temperature of the medium print(Office.lighting_demand) # Print Lighting Demand print(Office.energy_demand) # Print heating/cooling loads # Example of how to change the set point temperature after running a simulation Office.theta_int_h_set = 20.0 # Solve again for the new set point temperature Office.solve_energy(internal_gains, solar_gains, t_air, t_m_prev)