# 21. BHP Full-Form | What is Brake Horse Power (BHP)

By | December 20, 2019

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### BHP

The (abbreviation) full form of BHP is Brake Horse Power.

#### Additional Information About BHP

The quantity of power generated by a motor without considering the auxiliary components that are likely to slow down the actual speed of the motor is called Brake horsepower (BHP). The Brake horsepower is measured within the output shaft of the engine. The measurement of BHP basically depends on the configuration of the engine and the engine’s dynamometer is used to measure the Brake horsepower.

The total load of the electric motor is taken into consideration while calculating the Brake horsepower. Due to the action of various belts and pulleys, power loss occurs which is added back into the base figure to determine the true amount of pure Brake horsepower generated by the motor. By measuring Brake horsepower, it is possible to determine how much power must be produced to allow the motor to function at peak efficiency with the core functions.

Units of Measurement – Brake Horse Power is measured in KW (KiloWatts).

#### The expression for Brake Horse Power –

Brake Horse Power for a pump or a fan can be expressed as follows –

Pbhp = (γ Q h / 33000) / η

Where,

Pbhp = brake horsepower (horsepower, hp)

Q = volume flow rate (ft3/min, cfm)

η = overall efficiency

Brake Horse Power for a turbine can be expressed as follows –

Pbhp = η (γ Q h / 33000)

#### Applications of Brake Horse Power in Car

• Brake horsepower can be applied by the engine through the wheels of a car. It determines the torque which is the twisting power that the wheels can then apply against the road.
• Cars are equipped with a hand brake which helps in slowing down the forward projection of the vehicle. This same hand brake was also used in the manufacturing process to gauge the amount of torque created within the motor, making sure the output was within acceptable limits.

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