Cooling Tower Fan Blade Pitch Angle

Frequencies present at cooling towers.

Cooling tower fan blade pitch angle.

B t 260 and above. This fan operating point will have a discrete efficiency. So the fan blade pitch angle is increased to increase the capacity of the fan. Note that fan cost cell could vary from 3 621 to 4 737 for a difference of 1 116 fan.

The optimal blade pitch for a ceiling fan is between 12 to 15 degrees. 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. Fan speed motor speed blade pass frequency. Neither too much nor too litt.

Blade pitch is the angle at which the blades are set relative to parallel to the ground. 28 ft nine bladed fan at 20 pitch or a 12 bladed fan at 16º pitch. Generally the pitch angle of a cooling tower turbine is very from 6 degree to 15 degree depending on the operational speed and discharge. The cooling tower blades move large volumes of air quietly and efficiently.

A t 25 t 250. For a certain fan speed only one pitch angle will satisfy the system design operating condition. These common misnomers are often used to entice people to purchase a ceiling fan regardless of how well it actually performs. No overall vibration level standards are offered by cti.

These differences are due to difference in fan efficiency at different blade angles. The method is easy tools required in this videos to measure and adjust the pitch angle of the cooling tower fan blades ar. Table 1 shows a comparison of selections. The pitch angle of 50 tonne unit was around 12 degree as per my observation.

How to adjust it. This degree of blade pitch allows a ceiling fan to move a just right amount of air. Also note the difference in power requirements from 147 to 164 hp. Made of reinforced plastic material the blades are coupled to the fan hub by bolts and glue.

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. The angle of the blade makes a difference in how much air a fan is able to circulate throughout a room. However efficiency varies as much as 10 15 percent from pitch angle to pitch angle and even along the usable portion of each pitch. We could also consider 26 ft diameter fans or 30 ft fans.

Made of aluminum alloy the blades are freely adjustable by the pitch angle scale of the fan hub. 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.