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Indicated Power Calculator

Formula

To calculate the indicated power (IP):

$\text{IP} = 100 \times k \times p \times L \times A \times \frac{n}{60}$

Where:

$\text{IP}$ is the Indicated Power (kW)
$k$ is the number of cylinders
$p$ is the effective pressure (bar)
$L$ is the stroke length (m)
$A$ is the piston area (m²)
$n$ is the rotational speed (RPM)

What is Indicated Power?

Indicated Power (IP) is the power developed inside the cylinders of an engine. It is calculated based on the pressure exerted on the pistons, the number of cylinders, the stroke length, the piston area, and the rotational speed of the engine.

Example Calculation 1

Let's assume the following values:

Number of Cylinders ( $k$ ) = 4
Effective Pressure ( $p$ ) = 10 bar
Stroke Length ( $L$ ) = 0.3 m
Piston Area ( $A$ ) = 0.05 m²
Rotational Speed ( $n$ ) = 3000 RPM

Using the formula:

$\text{IP} = 100 \times 4 \times 10 \times 0.3 \times 0.05 \times \frac{3000}{60} = 100 \times 4 \times 10 \times 0.3 \times 0.05 \times 50 = 3000 \text{ kW}$

The Indicated Power is 3000 kW.

Example Calculation 2

Let's assume the following values:

Number of Cylinders ( $k$ ) = 6
Effective Pressure ( $p$ ) = 12 bar
Stroke Length ( $L$ ) = 0.4 m
Piston Area ( $A$ ) = 0.06 m²
Rotational Speed ( $n$ ) = 2500 RPM

Using the formula:

$\text{IP} = 100 \times 6 \times 12 \times 0.4 \times 0.06 \times \frac{2500}{60} = 100 \times 6 \times 12 \times 0.4 \times 0.06 \times 41.67 = 7200 \text{ kW}$

The Indicated Power is 7200 kW.