Zone Exhaust Fan

Stencil: Zone HVAC Stencil: Zone Exhaust Fan

Type: Fan

Sub Type: ZoneExhaust

EnergyPlus IDF Objects

Component Properties

The table shows the properties that are displayed when the component is selected while in diagram mode. The second column shows the selection options available that are dictated by EnergyPlus or it shows the source for the library entries that are displayed in the drop down list.

Property Name	Value Sources/Options
Name	Simergy provides unique name (editable)
Availability Schedule Name
Fan Efficiency	0-Min; 1-Max; 0.6-default
Pressure Rise
Maximum Flow Rate	0-Min
End-Use Subcategory	General-default

Name

Simergy automatically defines a unique name for each component. This can be changed by the user if desired.

Field: Availability Schedule Name

Schedule that this component will operate or is available to operate.

Field: Fan Efficiency

The ratio of the power delivered to the fluid to the electrical input power at maximum flow. It is the product of the motor efficiency and the fan efficiency. The motor efficiency is the power delivered to the shaft divided by the electrical power input to the motor. The fan efficiency is power delivered to the fluid (air) divided by the shaft power. The power delivered to the fluid is the mass flow rate of the air multiplied by the pressure rise divided by the air density. Must be between 0 and 1.

Field: Pressure Rise

The pressure rise in Pascals at full flow and standard (sea level) conditions (20°C and 101325 Pa).

Field: Maximum Flow Rate

The full load air volumetric flow rate (m³/sec) at standard temperature and pressure (dry air at 20°C drybulb). The program does use local barometric pressure to account for altitude using equation for "standard atmospheric" pressure on p 6.1 of the ASHRAE 1997 HOF (SI edition) to initialize the air systems being simulated.

p=101325*(1-2.25577E-05*Z)**5.2559

where p=pressure in Pa and Z=altitude in m

Field: End-Use Subcategory

Allows you to specify a user-defined end-use subcategory, e.g., "Kitchen Exhaust", "Fume Hoods", etc. A new meter for reporting is created for each unique subcategory (ref: Report Meter). Subcategories are also reported in the ABUPS table. If this field is omitted or blank, the fan will be assigned to the "General" end-use subcategory.

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