def is_mechanical_ventilation_heat_recovery_active(bpr, tsd, t):
"""
Control of activity of heat exchanger of mechanical ventilation system
Author: Gabriel Happle
Date: APR 2017
:param bpr: Building Properties
:type bpr: BuildingPropertiesRow
:param tsd: Time series data of building
:type tsd: dict
:param t: time step / hour of the year
:type t: int
:return: Heat exchanger ON/OFF status
:rtype: bool
"""
if is_mechanical_ventilation_active(bpr, tsd, t)\
and has_mechanical_ventilation_heat_recovery(bpr)\
and control_heating_cooling_systems.is_heating_season(t, bpr):
if is_night_flushing_active(bpr, tsd, t) or is_economizer_active(
bpr, tsd, t):
return False
else:
return True
elif is_mechanical_ventilation_active(bpr, tsd, t)\
and has_mechanical_ventilation_heat_recovery(bpr)\
and control_heating_cooling_systems.is_cooling_season(t, bpr)\
and tsd['T_int'][t-1] < tsd['T_ext'][t]:
return True
elif is_mechanical_ventilation_active(bpr, tsd, t) \
and control_heating_cooling_systems.is_cooling_season(t, bpr) \
and tsd['T_int'][t-1] >= tsd['T_ext'][t]:
# heat recovery is deactivated in the cooling case,
# if outdoor air conditions are colder than indoor (free cooling)
return False
else:
return False
def is_mechanical_ventilation_heat_recovery_active(bpr, tsd, t):
"""
Control of activity of heat exchanger of mechanical ventilation system
Author: Gabriel Happle
Date: APR 2017
:param bpr: Building Properties
:type bpr: BuildingPropertiesRow
:param tsd: Time series data of building
:type tsd: dict
:param t: time step / hour of the year
:type t: int
:return: Heat exchanger ON/OFF status
:rtype: bool
"""
if is_mechanical_ventilation_active(bpr, tsd, t)\
and has_mechanical_ventilation_heat_recovery(bpr)\
and control_heating_cooling_systems.is_heating_season(t, bpr):
# heat recovery is always active if mechanical ventilation is active (no intelligent by pass)
# this is the usual system configuration according to Clayton Miller
return True
elif is_mechanical_ventilation_active(bpr, tsd, t)\
and has_mechanical_ventilation_heat_recovery(bpr)\
and control_heating_cooling_systems.is_cooling_season(t, bpr)\
and tsd['T_int'][t-1] < tsd['T_ext'][t]:
return True
elif is_mechanical_ventilation_active(bpr, tsd, t) \
and control_heating_cooling_systems.is_cooling_season(t, bpr) \
and tsd['T_int'][t-1] >= tsd['T_ext'][t]:
# heat recovery is deactivated in the cooling case,
# if outdoor air conditions are colder than indoor (free cooling)
return False
else:
return False
def calc_heating_cooling_loads(bpr, tsd, t):
"""
:param bpr:
:param tsd:
:param t:
:return:
"""
# first check for season
if control_heating_cooling_systems.is_heating_season(t, bpr)\
and not control_heating_cooling_systems.is_cooling_season(t, bpr):
# +++++++++++++++++++++++++++++++++++++++++++
# HEATING
# +++++++++++++++++++++++++++++++++++++++++++
# check system
if not control_heating_cooling_systems.has_heating_system(bpr) \
or not control_heating_cooling_systems.heating_system_is_active(tsd, t):
# no system = no loads
rc_model_temperatures = calc_rc_no_loads(bpr, tsd, t)
elif control_heating_cooling_systems.has_radiator_heating_system(bpr)\
or control_heating_cooling_systems.has_floor_heating_system(bpr):
# radiator or floor heating
rc_model_temperatures = calc_heat_loads_radiator(bpr, t, tsd)
tsd['Ehs_lat_aux'][t] = 0 # TODO
# elif has_local_ac_heating_system:
# TODO: here could be a heating system using the mini-split unit ("T5")
elif control_heating_cooling_systems.has_central_ac_heating_system(
bpr):
rc_model_temperatures = calc_heat_loads_central_ac(bpr, t, tsd)
else:
# message and no heating system
warnings.warn(
'Unknown heating system. Calculation without system.')
# no system = no loads
rc_model_temperatures = calc_rc_no_loads(bpr, tsd, t)
# update tsd
update_tsd_no_cooling(tsd, t)
# for dashboard
detailed_thermal_balance_to_tsd(tsd, bpr, t, rc_model_temperatures)
elif control_heating_cooling_systems.is_cooling_season(t, bpr) \
and not control_heating_cooling_systems.is_heating_season(t, bpr):
# +++++++++++++++++++++++++++++++++++++++++++
# COOLING
# +++++++++++++++++++++++++++++++++++++++++++
# check system
if not control_heating_cooling_systems.has_cooling_system(bpr)\
or not control_heating_cooling_systems.cooling_system_is_active(bpr, tsd, t):
# no system = no loads
rc_model_temperatures = calc_rc_no_loads(bpr, tsd, t)
elif control_heating_cooling_systems.has_local_ac_cooling_system(bpr):
rc_model_temperatures = calc_cool_loads_mini_split_ac(bpr, t, tsd)
elif control_heating_cooling_systems.has_central_ac_cooling_system(
bpr):
rc_model_temperatures = calc_cool_loads_central_ac(bpr, t, tsd)
elif control_heating_cooling_systems.has_3for2_cooling_system(bpr):
rc_model_temperatures = calc_cool_loads_3for2(bpr, t, tsd)
elif control_heating_cooling_systems.has_ceiling_cooling_system(bpr) or \
control_heating_cooling_systems.has_floor_cooling_system(bpr):
rc_model_temperatures = calc_cool_loads_radiator(bpr, t, tsd)
else:
# message and no cooling system
warnings.warn(
'Unknown cooling system. Calculation without system.')
# no system = no loads
rc_model_temperatures = calc_rc_no_loads(bpr, tsd, t)
# update tsd
update_tsd_no_heating(tsd, t)
# for dashboard
detailed_thermal_balance_to_tsd(tsd, bpr, t, rc_model_temperatures)
else:
warnings.warn('Timestep %s not in heating season nor cooling season' %
t)
calc_rc_no_loads(bpr, tsd, t)
return