Fan Selector

Fan Selector Help

Making Fan Selections
  1. The Fan Selections Screen
  2. Entering the Required Duty Point
  3. The Electrical Phase & Specific Fan Power Filter
  4. Choosing the Fan Ranges to Select From
  5. Range Specific Additional Parameters
  6. OEM Range Specific Parameters
  7. Making the Selection
  8. Selected Fans
  9. Displaying Fan Data
  10. Selecting Ancillaries
Using Axial Configurator
  1. The Axial Configurator Screen
  2. Motor, Case & Impeller Options
The Performance Curve
  1. Understanding the Fan Performance Curve
Creating Fan Data Sheets
  1. Creating Fan Data Sheets
Building a Quotation
  1. Adding to a Quotation
  2. The Quotations Screen
  3. The Quotations Toolbar
  4. Save as Excel
Viewing Extra Literature
  1. Viewing Extra Literature for the Selected Fan
Program Preferences
  1. Customizing the Programs Operation
Glossary of Terms
  1. Terms Used in Fan Selector

 
 
 
 

Glossary of Terms Used in Fan Selector

Required Duty
This is the required duty point entered by the user.

Actual Duty
This is the actual operating duty for the fan.

Fan Input Power or Absorbed Power
This is the power consumed by the impeller it excludes all losses due to the internal contents of the unit fans, controls, power supplies etc. This is the power to be used in the calculation of Fan Efficiency. This is calculated at the selected duty point for the fan.
For a direct drive fan the Motor Output Power equals the Impeller Power which in Fan Selector as Fan Input Power or Absorbed Power, i.e. the power absorbed by the impeller.

Maximum Fan Input Power
This is the maximum power taken by the impeller on its performance curve, unless the exact duty point is chosen where this occurs the Fan Input Power will always be lower.

Motor Input Power
ISO5801:1997 (BS848 Pt: 1:1997) definition: The electrical power supplied at the terminals of an electric motor drive.
The difference between Motor Input Power and Fan Input Power (Absorbed Power) are a measure of the losses both mechanical and electrical within the motor.
Fan Selector calculates the Motor Input Power from the tested Fan Input Power (Absorbed Power) and the motor manufacturers quoted efficiency percentages.
This is the power consumed by the equipment that you actually pay for it includes all losses due to the internal contents of the unit fans, controls, power supplies etc. This is the power to be used in the calculation of Specific Fan Power. This is calculated at the selected duty point for the fan.

Specific Fan Power
Not actually a power rating, but a ratio that quantifies how much power is used to move a unit air quantity through a given HVAC system. It is quoted as Watts per litre per second. The power used in this calculation is the Motor Input Power.

Nominal Motor Rating
This is the rated power of the motor in accordance with IEC 34-1.
For fans the Nominal Motor Power is taken as the rating for the absorbed power of the fan.

Fan Efficiency
The Fan Efficiency is the ratio of the power transferred to the airflow and the power used by the fan. It is calculated as the air volume flow (m/s) multiplied by the total pressure (Pa) divided by the Fan Input Power.

Motor Efficiency
Fan Selector quotes the motor manufacturers efficiency percentages.
 
 
 
 
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