def test_glazing_to_from_standards_dict():
"""Test the initialization of EnergyMaterial objects from standards gem."""
standards_dict = {
"name": "PYR B CLEAR 3MM",
"material_type": "StandardGlazing",
"thickness": 0.118110236220472,
"conductivity": 6.24012461866438,
"resistance": 0.160253209849202,
"optical_data_type": "SpectralAverage",
"solar_transmittance_at_normal_incidence": 0.74,
"front_side_solar_reflectance_at_normal_incidence": 0.09,
"back_side_solar_reflectance_at_normal_incidence": 0.1,
"visible_transmittance_at_normal_incidence": 0.82,
"front_side_visible_reflectance_at_normal_incidence": 0.11,
"back_side_visible_reflectance_at_normal_incidence": 0.12,
"infrared_transmittance_at_normal_incidence": 0.0,
"front_side_infrared_hemispherical_emissivity": 0.84,
"back_side_infrared_hemispherical_emissivity": 0.2,
"dirt_correction_factor_for_solar_and_visible_transmittance": 1.0,
"solar_diffusing": 0
}
mat_1 = EnergyWindowMaterialGlazing.from_standards_dict(standards_dict)
assert mat_1.name == 'PYR B CLEAR 3MM'
assert mat_1.thickness == pytest.approx(0.003, rel=1e-3)
assert mat_1.conductivity == pytest.approx(0.9, rel=1e-2)
def window_material_by_name(material_name):
"""Get an window material from the library given the material name.
Args:
material_name: A text string for the name of the material.
"""
try: # see if the material has already been loaded to a Python object
return _idf_window_materials[material_name]
except KeyError: # material likely needs to be loaded from standards data
try:
_mat_dict = _window_standards_dict[material_name]
except KeyError: # material is nowhere to be found; raise an error
raise ValueError(
'"{}" was not found in the window energy material library.'.
format(material_name))
# create the Python object from the standards gem dictionary
if _mat_dict['material_type'] == 'StandardGlazing':
_mat_obj = EnergyWindowMaterialGlazing.from_standards_dict(_mat_dict)
elif _mat_dict['material_type'] == 'SimpleGlazing':
_mat_obj = EnergyWindowMaterialSimpleGlazSys.from_standards_dict(
_mat_dict)
elif _mat_dict['material_type'] == 'Gas':
_mat_obj = EnergyWindowMaterialGas.from_standards_dict(_mat_dict)
else:
raise ValueError(
'Standards gem material type "{}" is not recognized.'.format(
_mat_dict['material_type']))
_mat_obj.lock()
_idf_window_materials[
material_name] = _mat_obj # next time, it will be loaded faster
return _mat_obj