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Testing Procedures for Air Flow and Coverage Area. Four Ways to determine CFM and Area Coverage. Method 1: Use CFM (Computation Fluid Mechanics); Method 2: Use CFD (Computational Fluid Dynamics); Method 3: Use AMCA 230-15; Method 4: Use Falco’s Test Procedure 102018;
25 Οκτ 2019 · When air flow increases, static pressure decreases; and when static pressure increases, air flow decreases. The 3 points depict possible scenarios where the fan will perform. To visualize the 3 scenarios, you may have to imagine an electronics enclosure being ventilated by the fan.
Understand the development of air velocity/airflow correction factors for various applications. Understand the proper application of the AABC standards for air velocity/airflow measurement, including the data and information required to be reported.
regard to fans. At the end of this presentation you will be able to: 1. Describe the basic components of airflow, how to measure them, and how they relate to each other. 2. Explain how to read fan curves, and what this knowledge helps to avoid. 3. Apply the Affinity laws for troubleshooting and solving problems.
To save time when converting velocity pressure into air velocity, the Dwyer Air Velocity Calculator may be used. A simple slide rule, it provides for all the factors needed to calculate air velocity quickly and accurately.
There are three common mounting methods for accelerometers used with portable vibration measurements. Permanent Accelerometers Placed on Motor and Fan Bearings. Vibration sensors should be placed in the radial (vertical & horizontal) and axial locations on the motor and fan bearings.
When a fan is specified for a given CFM and static pressure at conditions other than standard, the correction factors (shown in table below) must be applied in order to select the proper size fan, fan speed and BHP to meet the new condition.
