Brake horsepower is the actual power delivered to or by a shaft.
The centrifugal fans operates by throwing air away from the blade tips. The blade wheel are mounted in housing and the blades can be forward curved, straight, or backward curved.
Backward curved blades are generally more efficient and non-overloading.
The centrifugal fans are preferred before axial fans where high airflow rates and high static pressures are required.
Tube-axial fans consists of propeller-shaped blades and a drive motors mounted in tubes. The fans are in general build to be implemented in the duct work.
Vane-axial fans are variations of the tube-axial fans with air straightening vanes added in front of or behind the propeller blades.
A propeller-axial fan consists of a a propeller-shaped blade and a drive motor mounted on a flat frame. The construction is often build to be installed in a wall or located individually in the room.
Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more.
The affinity laws can be used to calculate resulting volume capacity, head or power consumption when speed or wheel diameters are changed.
Pressure, head, air flow volume and fan capacity diagrams.
AHP - Air Horse Power and BHP - Brake Horse Power.
The difference between pumps, compressors, blowers and fans.
British Horse Power as used for pumps, fans and turbines - and how to convert to other units.
Static pressure vs. pressure head in fluids.
Axial and propeller fans, centrifugal (radial) fans, mixed flow fans and cross flow fans.
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