def calc_air_mass_flow_mechanical_ventilation(bpr, tsd, t):
"""
Calculates mass flow rate of mechanical ventilation at time step t according to ventilation control options and
building systems properties
Author: Gabriel Happle
Date: 01/2017
:param bpr: Building properties row object
:type bpr: cea.demand.thermal_loads.BuildingPropertiesRow
:param tsd: Timestep data
:type tsd: Dict[str, numpy.ndarray]
:param t: time step [0..8760]
:type t: int
:return: updates tsd
"""
# if has mechanical ventilation and not night flushing : m_ve_mech = m_ve_schedule
if control_ventilation_systems.is_mechanical_ventilation_active(bpr, tsd, t) \
and not control_ventilation_systems.is_night_flushing_active(bpr, tsd, t)\
and not control_ventilation_systems.is_economizer_active(bpr, tsd, t):
# mechanical ventilation fulfills requirement - ventilation provided by infiltration (similar to CO2 sensor)
m_ve_mech = max(tsd['m_ve_required'][t] - tsd['m_ve_inf'][t], 0)
# TODO: check mech ventilation rule - maybe: required + infiltration
elif control_ventilation_systems.has_mechanical_ventilation(bpr) \
and control_ventilation_systems.is_night_flushing_active(bpr, tsd, t):
# night flushing according to strategy
# ventilation with maximum capacity = maximum required ventilation rate
m_ve_mech = tsd['m_ve_required'].max(
) # TODO: some night flushing rule
elif control_ventilation_systems.has_mechanical_ventilation(bpr) \
and control_ventilation_systems.is_economizer_active(bpr, tsd, t):
# economizer according to strategy
# ventilation with maximum capacity = maximum required ventilation rate
m_ve_mech = tsd['m_ve_required'].max()
elif not control_ventilation_systems.is_mechanical_ventilation_active(
bpr, tsd, t):
# mechanical ventilation is turned off
m_ve_mech = 0
else:
raise ValueError
tsd['m_ve_mech'][t] = m_ve_mech
return
def calc_air_mass_flow_window_ventilation(bpr, tsd, t):
"""
Calculates mass flow rate of window ventilation at time step t according to ventilation control options and
building systems properties
Author: Gabriel Happle
Date: 01/2017
:param bpr: Building properties row object
:type bpr: cea.demand.thermal_loads.BuildingPropertiesRow
:param tsd: Timestep data
:type tsd: Dict[str, numpy.ndarray]
:param t: time step [0..8760]
:type t: int
:return: updates tsd
"""
# if has window ventilation and not special control : m_ve_window = m_ve_schedule
if control_ventilation_systems.is_window_ventilation_active(bpr, tsd, t) \
and not control_ventilation_systems.is_night_flushing_active(bpr, tsd, t):
# window ventilation fulfills requirement (control by occupants similar to CO2 sensor)
m_ve_window = max(tsd['m_ve_required'][t] - tsd['m_ve_inf'][t], 0)
# TODO: check window ventilation calculation, there are some methods in SIA2044
elif control_ventilation_systems.is_window_ventilation_active(bpr, tsd, t) \
and control_ventilation_systems.is_night_flushing_active(bpr, tsd, t):
# ventilation with maximum capacity = maximum required ventilation rate
m_ve_window = max(
tsd['m_ve_required']) # TODO: implement some night flushing rule
elif not control_ventilation_systems.is_window_ventilation_active(
bpr, tsd, t):
m_ve_window = 0
else:
raise ValueError
tsd['m_ve_window'][t] = m_ve_window
return