When the drive sheave size is doubled, what happens to the static pressure?

When the drive sheave size is doubled, the static pressure becomes four times greater due to the principles of fluid mechanics, specifically the relationship between the area of the sheave and the resultant pressure.

To elaborate, the sheave converts speed into pressure. When you double the size of the drive sheave, you not only increase the area but also alter the velocity and the dynamic behavior of the air or fluid moving through the system. The relationship is rooted in the fact that pressure is proportional to the square of the velocity in a system governed by Bernoulli's principle. Since velocity changes with size adjustments of the sheave, doubling the size increases the area, which subsequently affects the pressure exerted.

In this case, if the area is multiplied by four (since area is a function of the square of the radius in a circular sheave), the resulting increase in static pressure corresponds to this factor of four. This principle helps in understanding how alterations in mechanical components influence system behavior in sheet metal applications and HVAC systems.