Impeller Power Calculator

Impeller Power Formula:

\[ IP = \frac{w \times Q \times Vw2 \times u2}{1000 \times [g]} \]

Specific Weight of Fluid in Pump:

N/m³

Actual Discharge at Centrifugal Pump Outlet:

m³/s

Velocity of Whirl at Outlet:

m/s

Tangential Velocity of Impeller at Outlet:

m/s

Impeller Power of Centrifugal Pump:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Impeller Power of Centrifugal Pump?

The Impeller Power of Centrifugal Pump is the power developed at the impeller in the centrifugal pump. It represents the actual power transferred from the impeller to the fluid being pumped.

2. How Does the Calculator Work?

The calculator uses the Impeller Power formula:

\[ IP = \frac{w \times Q \times Vw2 \times u2}{1000 \times [g]} \]

Where:

\( w \) — Specific weight of fluid in pump (N/m³)
\( Q \) — Actual discharge at centrifugal pump outlet (m³/s)
\( Vw2 \) — Velocity of whirl at outlet (m/s)
\( u2 \) — Tangential velocity of impeller at outlet (m/s)
\( [g] \) — Gravitational acceleration constant (9.80665 m/s²)

Explanation: The formula calculates the power developed by the impeller based on fluid properties and velocity components at the pump outlet.

3. Importance of Impeller Power Calculation

Details: Accurate impeller power calculation is crucial for pump design, efficiency analysis, motor sizing, and energy consumption estimation in centrifugal pump systems.

4. Using the Calculator

Tips: Enter specific weight in N/m³, discharge in m³/s, velocities in m/s. All values must be positive and valid for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is specific weight of fluid?
A: Specific weight is the weight per unit volume of a fluid, calculated as density multiplied by gravitational acceleration.

Q2: How is velocity of whirl different from tangential velocity?
A: Velocity of whirl is the tangential component of absolute velocity, while tangential velocity is the peripheral velocity of the impeller.

Q3: Why is gravitational constant included in the formula?
A: The gravitational constant is used to convert from force units to power units and ensure dimensional consistency.

Q4: What are typical units for impeller power?
A: Impeller power is typically measured in kilowatts (kW) or horsepower (HP) in pump engineering.

Q5: How does impeller power relate to pump efficiency?
A: Impeller power represents the power input to the fluid, while pump efficiency is the ratio of hydraulic power to shaft power.