def test_ptac_equality():
"""Test the equality of PTAC objects."""
hvac_sys = PTAC('Test System')
hvac_sys_dup = hvac_sys.duplicate()
hvac_sys_alt = PTAC('Test System', equipment_type='PTAC_DHW')
assert hvac_sys is hvac_sys
assert hvac_sys is not hvac_sys_dup
assert hvac_sys == hvac_sys_dup
hvac_sys_dup.equipment_type = 'PTAC_GasCoil'
assert hvac_sys != hvac_sys_dup
assert hvac_sys != hvac_sys_alt
def test_ptac_dict_methods():
"""Test the to/from dict methods."""
hvac_sys = PTAC('High Efficiency HVAC System')
hvac_sys.vintage = 'ASHRAE_2010'
hvac_sys.equipment_type = 'PTAC_DHW'
hvac_dict = hvac_sys.to_dict()
new_hvac_sys = PTAC.from_dict(hvac_dict)
assert new_hvac_sys == hvac_sys
assert hvac_dict == new_hvac_sys.to_dict()
def test_ptac_init():
"""Test the initialization of PTAC and basic properties."""
hvac_sys = PTAC('Test System')
str(hvac_sys) # test the string representation
assert hvac_sys.identifier == 'Test System'
assert hvac_sys.vintage == 'ASHRAE_2019'
assert hvac_sys.equipment_type == 'PTAC_ElectricBaseboard'
assert hvac_sys.economizer_type == 'NoEconomizer'
assert hvac_sys.sensible_heat_recovery == 0
assert hvac_sys.latent_heat_recovery == 0
hvac_sys.vintage = 'ASHRAE_2010'
hvac_sys.equipment_type = 'PTAC_DHW'
with pytest.raises(AssertionError):
hvac_sys.economizer_type = 'DifferentialDryBulb'
with pytest.raises(AssertionError):
hvac_sys.sensible_heat_recovery = 0.8
with pytest.raises(AssertionError):
hvac_sys.latent_heat_recovery = 0.65
assert hvac_sys.vintage == 'ASHRAE_2010'
assert hvac_sys.equipment_type == 'PTAC_DHW'
def hvac_2004(model_json, climate_zone, nonresidential, fuel, floor_area,
story_count, output_file):
"""Convert a Model's HVAC to be conformant with ASHRAE 90.1-2004 appendix G.
This includes the selection of the correct Appendix G template HVAC based on
the inputs and the application of this HVAC to all conditioned spaces in
the model.
\b
Args:
model_json: Full path to a Model JSON file.
climate_zone: Text indicating the ASHRAE climate zone. This can be a single
integer (in which case it is interpreted as A) or it can include the
A, B, or C qualifier (eg. 3C).
"""
try:
# re-serialize the Model to Python and get the glazing ratios
with open(model_json) as json_file:
data = json.load(json_file)
model = Model.from_dict(data)
# determine the HVAC template from the input criteria
std = 'ASHRAE_2004'
if len(climate_zone) == 1:
climate_zone = '{}A'.format(climate_zone)
if nonresidential:
# determine the floor area if it is not input
if floor_area == 0 or floor_area is None:
floor_area = model.floor_area
floor_area = floor_area if model.units == 'Meters' else \
floor_area * model.conversion_factor_to_meters(model.units)
# determine the number of stories if it is not input
if story_count == 0 or story_count is None:
story_count = len(model.stories)
# determine the HVAC from the floor area and stories
hvac_id = 'Baseline 2004 {} HVAC'
if story_count > 5 or floor_area > 13935.5: # more than 150,000 ft2
hvac_id = hvac_id.format('VAV')
hvac_sys = VAV(hvac_id, std, 'VAV_Chiller_Boiler') \
if fuel else VAV(hvac_id, std, 'VAV_Chiller_PFP')
elif story_count > 3 or floor_area > 6967.7: # more than 75,000 ft2
hvac_id = hvac_id.format('PVAV')
hvac_sys = PVAV(hvac_id, std, 'PVAV_Boiler') \
if fuel else PVAV(hvac_id, std, 'PVAV_PFP')
else:
hvac_id = hvac_id.format('PSZ')
hvac_sys = PSZ(hvac_id, std, 'PSZAC_Boiler') \
if fuel else PSZ(hvac_id, std, 'PSZHP')
if climate_zone not in ('1A', '1B', '2A', '3A', '4A'):
hvac_sys.economizer_type = 'DifferentialDryBulb'
else:
hvac_id = 'Baseline 2004 PT Residential HVAC'
hvac_sys = PTAC(hvac_id, std, 'PTAC_BoilerBaseboard') \
if fuel else PTAC(hvac_id, std, 'PTHP')
# apply the HVAC template to all conditioned rooms in the model
for room in model.rooms:
if room.properties.energy.is_conditioned:
room.properties.energy.hvac = hvac_sys
# write the Model JSON string
output_file.write(json.dumps(model.to_dict()))
except Exception as e:
_logger.exception(
'Model baseline geometry creation failed.\n{}'.format(e))
sys.exit(1)
else:
sys.exit(0)