Question

Question 20In a four stroke diesel engine Indicated Power is 5625 W and Brake power is 4500 W then the frictional power will be​

Answer 1

20

5625+4500=10,125

SO THE ANSWER IS 10,145

Answer 2

The Frictional Power of the given engine is 1100W

Explanation:

• Definition: Friction powers (FP) in kW for operating points are calculated by subtracting brake power (BP) from indicated power (IP), under steady-state conditions.

Calculation:

• Therefore FP = IP - BP
• Here, IP = 5625 Watt and BP = 4500 Watt
• In this case, FP = 5625 - 4500 (Watt)
• Therefore, in this case, Frictional power is 1100W (or almost 1.47 Horse Power)

Importance/meaning of Frictional Power:

• Engine friction has been a research topic for many years.
• The Morse test, PV diagram, Willans Line method, and motoring test are all described in the literature as classic methods for assessing engine friction.
• The PV diagram method is thought to yield more accurate engine friction findings.
• In a diesel engine, Taylor and Comfort looked at total engine mechanical friction losses.
• The piston ring assembly and bearings were responsible for the majority of mechanical friction losses inside the engine, accounting for 65 per cent to 70 per cent of total mechanical friction losses.
• In order to improve fuel efficiency, it is vital to concentrate on reducing friction losses.
• These "Friction Losses" in an engine are defined as the Frictional Power of an engine.