Question

A centrifugal pump has an efficiency of 80%. The specifications of the pump are: discharge = 70m Vhr, Head = 7m, speed = 1450 rpm and diameter = 200mm. If the speed of this pump is increased to 1750 rpm, Calculate the discharge, heat developed and power input required without loss in Efficiency.

Answer 1

A centrifugal pump discharges 300 gpm against a head of 55 ft when the speed is 1500 rpm. The diameter of the impeller is 12.5 in and the brake horsepower

Answer 2

Answer:

Explanation:

Centrifugal pump:

Centrifugal pumps move fluids by converting the kinetic energy of rotation into the hydrodynamic energy of the fluid flow. An engine or electric motor is normally where the rotational energy comes from. They are an axisymmetrical dynamic work-absorbing turbomachinery subclass. A diffuser or volute chamber (casing) is where the fluid departs the pump after entering the impeller along or close to the rotating axis and being accelerated by the impeller.

Pumping for petroleum and petrochemicals, sewage, agriculture, and water are a few common uses. Due to their high flow rates, compatibility with abrasive solutions, mixing potential, and relatively straightforward architecture, centrifugal pumps are frequently used in industrial settings.

A centrifugal fan is frequently used to power a vacuum cleaner or air handling machine. The centrifugal pump's opposite operation is a water turbine that transforms potential energy from water pressure into mechanical rotational energy.

Working:

• View from behind a centrifugal pump
• A centrifugal pump, like the majority of pumps, transforms rotational energy, frequently from a motor, into energy in a moving fluid. A fraction of the energy is converted into fluid kinetic energy.
• The casing's eye serves as the axial entry point for fluid, which is then captured in the impeller blades and whirling tangentially and radially outward until it exits via all of the impeller's circumferential portions and reaches the diffuser portion of the casing.
• While flowing through the impeller, the fluid increases in both velocity and pressure.
• The casing's doughnut-shaped diffuser, also known as the scroll section, slows the flow and raises the pressure even more.

At a speed of 1500 rpm, a centrifugal pump can discharge 300 gpm against a 55-foot head. The impeller measures 12.5 inches in diameter, and the brake horsepower.

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