Enter the number of cylinders, the effective pressure (bar), RPM, piston area (m^2), and the stroke length (m) into the calculator to determine the Indicated Power.
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Indicated Power Formula
The following formula is used to calculate the Indicated Power.
IP = 100 * k * p * L * A *n / 60
- Where 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 (m^2)
- n is the rotational speed (RPM)
How to Calculate Indicated Power?
The following example problems outline how to calculate Indicated Power.
Example Problem #1
- First, determine the number of cylinders. In this example, the number of cylinders is determined to be 2.
- Next, determine the effective pressure (bar). For this problem, the effective pressure (bar) is measured to be 41 .
- Next, determine the stroke length (m). In this case, the stroke length (m) is found to be 4.
- Next, determine the piston area. In this case, the area is .25.
- Next, determine the RPM. This is given as 30.
- Finally, calculate the Indicated Power using the formula above:
IP = 100 * k * p * L * A *n / 60
Inserting the values from above and solving yields:
IP = 100 * 2* 41 * 4 * .25 *30 / 60 = 4100 (kW)
Example Problem #2
Using the same method as above, determine the variables required by the formula. For this example problem, these are:
number of cylinders = 2
effective pressure (bar) = 8
stroke length (m) = .09
area (m^2) = .67
RPM = 100
Enter these given values into the calculator or above yields:
IP = 100 * 2* 8 * .09 * .67 * 100 / 60 = 160.8 (kW)
