IfcSpaceThermalLoadProperties
Definition from IAI:
The space thermal load IfcSpaceThermalLoadProperties defines all thermal losses and gains
occurring within a space or zone. Those losses or gains can either be requirements
(desired values) or criteria (actual values). The thermal load source attribute defines
an enumeration of possible sources of the thermal load. The maximum, minimum, time series and applicable
value ratio values are all interpreted according to the source. The maximum and minimum values
should not be used if time series values are provided.
The IfcSpaceThermalLoadProperties is a statically defined property set and
should be attached to the instance(s) of IfcSpace through the
IfcRelDefinesByProperties relationship. If there are several different
thermal loads occuring within a space, multiple instances of
IfcSpaceThermalLoadProperties should be assigned.
HISTORY: New entity in IFC R2.0, has been renamed from IfcSpaceUseCase in IFC Release 2x.
EXPRESS specification:
|
|
| ENTITY IfcSpaceThermalLoadProperties
|
|
|
|
|
| SourceDescription
|
:
|
OPTIONAL IfcText;
|
| UserDefinedThermalLoadSource
|
:
|
OPTIONAL IfcLabel;
|
| UserDefinedPropertySource
|
:
|
OPTIONAL IfcLabel;
|
|
|
|
Attribute definitions:
| ApplicableValueRatio
|
:
|
Percentage of use requirement or criteria applicable to the space, interpretation depends on the source
type.
|
| ThermalLoadSource
|
:
|
Source of the thermal loss or gain. Depending on the source, the maximum and minimum values have to be
interpreted. Refer to the space usage in Pset_SpaceProgramCommon to determine thermal loads associated
with the activity levels of people.
|
| PropertySource
|
:
|
The source of the space thermal load properties (e.g., are these design values, measured values, etc.).
|
| SourceDescription
|
:
|
Further specification for the source, which might be specific for a region or project. E.g. whether the
heat gain from Person is caused by specific activities.
|
| MaximumValue
|
:
|
The maximum thermal load value. If this value is less than zero (negative), then the thermal load is
lost from the space. If the value is greater than zero (positive), then the thermal load is a gain to
the space. If the minimum value is not specified, then this value is the actual value. At least one of
the maximum, minimum, or time series values must be specified.
|
| MinimumValue
|
:
|
The minimum thermal load value. If this value is less than zero (negative), then the thermal load is
lost from the space. If the value is greater than zero (positive), then the thermal load is a gain to
the space. The requirement for the inclusion of this attribute is dependant on the load source. At least
one of the maximum, minimum, or time series values must be specified.
|
| ThermalLoadTimeSeriesValues
|
:
|
A time series of the thermal load values. If a value is less than zero (negative), then the thermal load
is lost from the space. If the value is greater than zero (positive), then the thermal load is a gain
to the space. These values are contributed from the specified thermal load source. At least one of the
maximum, minimum, or time series values must be specified.
|
| UserDefinedThermalLoadSource
|
:
|
This attribute must be defined if the ThermalLoadSource is USERDEFINED.
|
| UserDefinedPropertySource
|
:
|
This attribute must be defined if the PropertySource is USERDEFINED.
|
| ThermalLoadType
|
:
|
Defines the type of thermal load (e.g., sensible, latent, radiant, etc.).
|
Inheritance graph
|
|
| ENTITY IfcSpaceThermalLoadProperties;
|
|
|
|
|
| SourceDescription
|
:
|
OPTIONAL IfcText;
|
| UserDefinedThermalLoadSource
|
:
|
OPTIONAL IfcLabel;
|
| UserDefinedPropertySource
|
:
|
OPTIONAL IfcLabel;
|
|
|
|