Cooling Tower Fan Blade Pitch Angle

These common misnomers are often used to entice people to purchase a ceiling fan regardless of how well it actually performs.

Cooling tower fan blade pitch angle.

Fan speed motor speed blade pass frequency. Made of aluminum alloy the blades are freely adjustable by the pitch angle scale of the fan hub. The angle of the blade makes a difference in how much air a fan is able to circulate throughout a room. This degree of blade pitch allows a ceiling fan to move a just right amount of air.

28 ft nine bladed fan at 20 pitch or a 12 bladed fan at 16º pitch. Blade pitch alone does not determine the airflow of a ceiling fan although it is part of the equation. The method is easy tools required in this videos to measure and adjust the pitch angle of the cooling tower fan blades ar. The optimal blade pitch for a ceiling fan is between 12 to 15 degrees.

This fan operating point will have a discrete efficiency. Generally the pitch angle of a cooling tower turbine is very from 6 degree to 15 degree depending on the operational speed and discharge. Made of reinforced plastic material the blades are coupled to the fan hub by bolts and glue. So the fan blade pitch angle is increased to increase the capacity of the fan.

However efficiency varies as much as 10 15 percent from pitch angle to pitch angle and even along the usable portion of each pitch. The vibration levels at both motor fan speed are to be measured at the motor while the vibration levels at the blade pass frequency is to be measured at the fan shroud or stack. The cooling tower blades move large volumes of air quietly and efficiently. The pitch angle of 50 tonne unit was around 12 degree as per my observation.

Cooling tower fan blades pitch angle is varied depending on seasonal requirements cooling tower fan blade pitch angle is the angle made by the fan with the plane. Blade pitch is the angle at which the blades are set relative to parallel to the ground. Table 1 shows a comparison of selections. Normally during summer season the air density is low.

It is commonly stated that the steeper the blade pitch the more air a fan will move or a good fan will have a blade pitch of 14 degrees or more. These differences are due to difference in fan efficiency at different blade angles. How to adjust it. A t 25 t 250.

First of all technically it is called the pitch angle of a turbine blade. No overall vibration level standards are offered by cti. Also note the difference in power requirements from 147 to 164 hp. Neither too much nor too litt.

B t 260 and above. For a certain fan speed only one pitch angle will satisfy the system design operating condition.