def test_opaque_to_from_standards_dict():
"""Test the initialization of OpaqueConstruction objects from standards gem."""
filename = './tests/standards/OpenStudio_Standards_materials.json'
if filename:
with open(filename, 'r') as f:
data_store = json.load(f)
standards_dict = {
"name":
"Metal framed wallsW1_R8.60",
"intended_surface_type":
"ExteriorWall",
"standards_construction_type":
None,
"insulation_layer":
"Typical Insulation",
"skylight_framing":
None,
"materials": [
"Stucco - 7/8 in. CBES", "W1_R8.60",
"Air - Metal Wall Framing - 16 or 24 in. OC",
"Gypsum Board - 1/2 in. CBES"
]
}
wall_constr = OpaqueConstruction.from_standards_dict(
standards_dict, data_store)
assert wall_constr.name == 'Metal framed wallsW1_R8.60'
assert wall_constr.r_value == pytest.approx(1.7411, rel=1e-2)
assert wall_constr.u_value == pytest.approx(0.57434, rel=1e-2)
assert wall_constr.u_factor == pytest.approx(0.524972, rel=1e-2)
assert wall_constr.r_factor == pytest.approx(1.904860, rel=1e-2)
def test_opaque_to_from_standards_dict():
"""Test the initialization of OpaqueConstruction objects from standards gem."""
standards_dict = {
"name": "Typical Insulated Exterior Mass Wall",
"intended_surface_type": "ExteriorWall",
"materials": [
"1IN Stucco",
"8IN CONCRETE HW RefBldg",
"Typical Insulation",
"1/2IN Gypsum"]}
wall_constr = OpaqueConstruction.from_standards_dict(standards_dict)
assert wall_constr.name == 'Typical Insulated Exterior Mass Wall'
assert wall_constr.r_value == pytest.approx(0.29934598728, rel=1e-3)
assert wall_constr.u_value == pytest.approx(3.3406160178, rel=1e-3)
assert wall_constr.u_factor == pytest.approx(2.159364735, rel=1e-3)
assert wall_constr.r_factor == pytest.approx(0.463099162, rel=1e-3)
def opaque_construction_by_identifier(construction_identifier):
"""Get an opaque construction from the library given the construction identifier.
Args:
construction_identifier: A text string for the identifier of the construction.
"""
try: # see if the construction has already been loaded to a Python object
return _opaque_constructions[construction_identifier]
except KeyError: # construction likely needs to be loaded from standards data
try:
_constr_dict = _opaque_constr_standards_dict[construction_identifier]
except KeyError: # construction is nowhere to be found; raise an error
raise ValueError(
'"{}" was not found in the opaque energy construction library.'.format(
construction_identifier))
# create the Python object from the standards gem dictionary
_constr_obj = OpaqueConstruction.from_standards_dict(_constr_dict)
_constr_obj.lock()
_opaque_constructions[construction_identifier] = _constr_obj # load faster next time
return _constr_obj