Brake power measured with dynamo meter Calculator

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Engine Performance Parameters

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Design of IC Engine Components

Fuel Injection in IC Engine

Fundamentals of IC Engine

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For 4 Stroke Engine

For 2 Stroke Engine

✖Pulley diameter is defined as the diameter of pulley of rope brake dynamo meter.ⓘ Pulley diameter [D]			+10% -10%
✖Engine speed in rps is defined as the number of rotations of the crankshaft in one second during four stroke cycle.ⓘ Engine speed in rps [N_e]			+10% -10%
✖Dead weight is the weight of the body attached to the spring balance in newtons.ⓘ Dead weight [W]			+10% -10%
✖Spring scale reading is defined as the readings shown in the spring balance after the dead weight is attached to it.ⓘ Spring scale reading [S]			+10% -10%

✖Brake power measured with dynamo meter is defined as the brake power obtained by using a rope brake dynamo meter to measure the brake power of engine.ⓘ Brake power measured with dynamo meter [B.P]

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Formula

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Brake power measured with dynamo meter

Formula

`"B.P" = (pi*"D"*("N"_{"e"}*60)*("W"-"S"))/60`

Example

`"3523.449W"=(pi*"1.5m"*("17rev/s"*60)*("10N"-"3N"))/60`

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Brake power measured with dynamo meter Solution

STEP 0: Pre-Calculation Summary

Formula Used

Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60
B.P = (pi*D*(N_e*60)*(W-S))/60
This formula uses 1 Constants, 5 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Variables Used

Brake power measured with dynamo meter - (Measured in Watt) - Brake power measured with dynamo meter is defined as the brake power obtained by using a rope brake dynamo meter to measure the brake power of engine.
Pulley diameter - (Measured in Meter) - Pulley diameter is defined as the diameter of pulley of rope brake dynamo meter.
Engine speed in rps - (Measured in Radian per Second) - Engine speed in rps is defined as the number of rotations of the crankshaft in one second during four stroke cycle.
Dead weight - (Measured in Newton) - Dead weight is the weight of the body attached to the spring balance in newtons.
Spring scale reading - (Measured in Newton) - Spring scale reading is defined as the readings shown in the spring balance after the dead weight is attached to it.

STEP 1: Convert Input(s) to Base Unit

Pulley diameter: 1.5 Meter --> 1.5 Meter No Conversion Required
Engine speed in rps: 17 Revolution per Second --> 106.814150216614 Radian per Second (Check conversion here)
Dead weight: 10 Newton --> 10 Newton No Conversion Required
Spring scale reading: 3 Newton --> 3 Newton No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

B.P = (pi*D*(N_e*60)*(W-S))/60 --> (pi*1.5*(106.814150216614*60)*(10-3))/60

Evaluating ... ...

B.P = 3523.44877100949

STEP 3: Convert Result to Output's Unit

3523.44877100949 Watt --> No Conversion Required

FINAL ANSWER

3523.44877100949 ≈ 3523.449 Watt <-- Brake power measured with dynamo meter

(Calculation completed in 00.021 seconds)

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Credits

Created by Syed Adnan

Ramaiah University of Applied Sciences (RUAS), bangalore

Syed Adnan has created this Calculator and 200+ more calculators!

Verified by Kartikay Pandit

National Institute Of Technology (NIT), Hamirpur

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< 24 For 4 Stroke Engine Calculators

Volumetric efficiency of IC engine

Go Volumetric efficiency of IC engine = (Air Mass Flow Rate*Crankshaft revolutions per power stroke)/(Air density at intake*Theoretical volume of engine*Engine speed in rps)

Rate of heat conduction of engine wall

Go Rate of Heat Conduction of Engine Wall = ((-Thermal conductivity of material)*Surface Area of Engine Wall*Temperature Difference across Engine Wall)/Thickness of Engine Wall

Brake power measured with dynamo meter

Go Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60

Indicated Power of Four-stroke Engine

Go Indicated Power = (Number of Cylinders*Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed))/(2)

Volumetric Efficiency for 4S engines

Go Volumetric Efficiency = ((2*Air Mass Flow Rate)/(Air density at intake*Piston Swept Volume*(Engine Speed)))*100

Brake Mean Effective Pressure of 4S Engines given Brake power

Go Brake Mean Effective Pressure = (2*Brake Power)/(Stroke Length*Area of Cross Section*(Engine Speed))

Work done per cycle in ic engine

Go Work done per cycle in ic engine = (Indicated engine power*Crankshaft revolutions per power stroke)/Engine Speed in rpm

Fuel conversion efficiency

Go Fuel conversion efficiency = Work done per cycle in ic engine/(Mass of fuel added per cycle*Heating value of the fuel)

Combustion efficiency

Go Combustion efficiency = Heat added by combustion per cycle/(Mass of fuel added per cycle*Heating value of the fuel)

Intake air mass of engine cylinder

Go Mass of air at intake = (Air Mass Flow Rate*Crankshaft revolutions per power stroke)/Engine Speed in rpm

Bmep given engine torque

Go Bmep = (2*pi*Engine Torque*Engine Speed)/Mean Piston Speed

Displaced volume in engine cylinder

Go Displaced volume = (Piston stroke*pi*(Engine cylinder bore in meter^2))/4

Intake air density

Go Air density at intake = Intake air pressure/([R]*Intake air temperature)

Thermal efficiency of IC engine

Go Thermal efficiency of ic engine = Work done per cycle in ic engine/Heat added by combustion per cycle

Volumetric efficiency of IC engine given actual volume of engine cylinder

Go Volumetric efficiency of IC engine = Actual volume of intake air/Theoretical volume of engine

Connecting rod length to crank radius ratio

Go Connecting rod length to crank radius ratio = Connecting rod length/Crank Radius of Engine

Ratio of cylinder bore to piston stroke

Go Connecting rod length to crank radius ratio = Connecting rod length/Crank Radius of Engine

Total cylinder volume of IC engine

Go Total volume of an engine = Total number of cylinders*Total volume of engine cylinder

Fuel conversion efficiency given thermal conversion efficiency

Go Fuel conversion efficiency = Combustion efficiency*Thermal conversion efficiency

Frictional power of engine

Go Frictional power of engine = Indicated Power of Engine-Brake power of engine

Actual intake air volume per cylinder

Go Actual volume of intake air = Mass of air at intake/Air density at intake

Horsepower of engine

Go Horsepower of engine = (Engine Torque*Engine RPM)/5252

Indicated mean effective pressure given mechanical efficiency

Go Imep = Bmep/Mechanical efficiency of ic engine

Frictional mean effective pressure

Go Fmep = Imep-Bmep

Brake power measured with dynamo meter Formula

Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60
B.P = (pi*D*(N_e*60)*(W-S))/60

What is brake power measured with dynamo meter?

The rope dynamo meter measures the power by absorbing all the energy of the engine or prime mover by means of frictional resistance. The rope brake dynamo meter is the device that measures the power of the engine shaft by applying frictional resistance to the motion of the shaft by use of rope. It simply consists of pulley and rope arrangement along with the spring balance to measure the tension in ropes. The rope brake dynamo meter measures the torque required to stop the shaft of the prime mover.

How to Calculate Brake power measured with dynamo meter?

Brake power measured with dynamo meter calculator uses Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60 to calculate the Brake power measured with dynamo meter, The Brake power measured with dynamo meter formula is defined as the brake power obtained by using a rope brake dynamo meter to measure the brake power of engine. Brake power measured with dynamo meter is denoted by B.P symbol.

How to calculate Brake power measured with dynamo meter using this online calculator? To use this online calculator for Brake power measured with dynamo meter, enter Pulley diameter (D), Engine speed in rps (N_e), Dead weight (W) & Spring scale reading (S) and hit the calculate button. Here is how the Brake power measured with dynamo meter calculation can be explained with given input values -> 3523.449 = (pi*1.5*(106.814150216614*60)*(10-3))/60.

FAQ

What is Brake power measured with dynamo meter?

The Brake power measured with dynamo meter formula is defined as the brake power obtained by using a rope brake dynamo meter to measure the brake power of engine and is represented as B.P = (pi*D*(N_e*60)*(W-S))/60 or Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60. Pulley diameter is defined as the diameter of pulley of rope brake dynamo meter, Engine speed in rps is defined as the number of rotations of the crankshaft in one second during four stroke cycle, Dead weight is the weight of the body attached to the spring balance in newtons & Spring scale reading is defined as the readings shown in the spring balance after the dead weight is attached to it.

How to calculate Brake power measured with dynamo meter?

The Brake power measured with dynamo meter formula is defined as the brake power obtained by using a rope brake dynamo meter to measure the brake power of engine is calculated using Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60. To calculate Brake power measured with dynamo meter, you need Pulley diameter (D), Engine speed in rps (N_e), Dead weight (W) & Spring scale reading (S). With our tool, you need to enter the respective value for Pulley diameter, Engine speed in rps, Dead weight & Spring scale reading and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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