Using the Fan Device in PIPE-FLO® Advantage and Professional 17
The new Fan device is used to size or evaluate the performance of a fan in systems modeled in PIPE-FLO Advantage and Professional 17. Fans without performance curve data are considered to be in a "sizing" mode and can be set to define the operational flow rate, inlet pressure, outlet pressure, differential pressure, or a pressure ratio requirement that must be achieved by the fan. Performance curve data is entered as pressure rise vs. flow rate for a fixed fest speed. Performance data also allows the Fan to be set to a fixed operating speed.
Design Data for a Fan
- Name (required): unique identifier, default set by Auto-Naming
- Design Status: non editable. Will change from Undesigned to Sizing to Designed when the sufficient operational and design data is entered, respectively.
- Elevation (required): this controls where the fan is in relation to the reference zero elevation datum of the system.
- Fan Curve (optional): enter the Fan Curve performance data for additional calculations such as speed, input power, and efficiency. The data entry table allows for copying the data from an external source and pasting it into the table.
- Operation (required): the Operation allows for modeling multiple process control scenarios by setting the Flow Rate, Discharge Pressure, Suction Pressure, and Differential Pressure. The Fan can be placed in Temperature Control mode by selecting the Fan as a Flow Control Device at a Heat Transfer Device. The Fixed Speed mode can only be used if the Fan Curve data is entered.
Calculated Results for a Fan
- Flow Rate
- Differential Total Pressure
- Differential Static Pressure
- Pressure Ratio
- Inlet Total Pressure
- Inlet Static Pressure
- Outlet Total Pressure
- Outlet Static Pressure
- Input Power
- Output Power
Fans can be modeled along with Compressible Pipe devices to be included in the compressible fluid flow analysis in PIPE-FLO Advantage, or with (incompressible) Pipe devices in Advantage or Professional. In sizing modes, the system configuration, boundary conditions, and the Fan's Operation setting determine the Fan requirements. For a fully designed Fan with performance curve data, the data is first adjusted by density based on the inlet Fluid Zone properties and the curve data reference fluid density. The performance is then adjusted for speed according to the Fan Affinity Rules. See the program Help File for equations used for the Fan.
For both compressible calculations in PIPE-FLO Advantage and incompressible calculations in PIPE-FLO Advantage and Professional, the performance curve data is linearly interpolated or extrapolated. A warning will be thrown if the operating point is outside the capabilities of the fan.
For greater accuracy, increase the number of data points in the performance curve contains