Graphics Programs Reference
In-Depth Information
Loss Coefficient
Available only when Loss Method is set to
Coefficient, this parameter is used in conjunction with the Flow
parameter to determine the pressure drop.
Flow Configuration
This parameter determines how the connector
flow will be calculated.
Calculated
This setting calculates airflow downstream of the
connection and sets the Flow parameter to the sum of those flows.
For example, a VAV Supply Air Outlet connector set to Calculated
will add up all of the supply air requirements for connected supply
air terminals that are using supply air connectors with a Preset flow
configuration. In other words, child families using Preset will pass
along their needs to the parent connector using a flow configuration
of Calculated.
Preset
No calculation is needed, and airflow is set to the Flow
parameter. This can be used for the inlet connector of VAV boxes.
System
This setting is similar to Calculated, but the flow factor
comes into play. It is best used for splitting the total system airflow
between air handlers.
Flow Direction
Flow Direction can be set to In, Out, or Bidirectional.
This setting refers to the direction that air is moving relative to the
connector, not the direction in which the air is flowing. For example, a
supply air diffuser should be set to In because the air is flowing from the
connected duct
into
the connector of the diffuser. An exhaust grille
would be set to Out because air is coming
out
of the connector and
entering the system.
System Classification
Here, the most appropriate system
classification is chosen for the application. Supply Air, Return Air, and
Exhaust Air are all pretty self-explanatory, but they also have other
uses.
Supply Air
Air that is to be supplied to a space can also be used to
model outside air, which is also known as air to be delivered to a
space or air handler. Supply air would usually also be used for
outside air.
