Header Ads

IC Engine performance parameters

IC Engine performance parameters:

IC Engine performance parameters help to find out the various types of efficiencies like thermal efficiency, mechanical efficiency, relative efficiencies, power, volumetric efficiency, brake power, indicated power, friction power, etc.

First Law Analysis Of IC Engine:

We know in internal combustion engine the chemical energy of the fuel which actually calculated in terms of calorific value, that chemical energy o fuel goes into combustion and from combustion pressure is created and that pressure is applied on the piston and that from the piston pressure goes to the crankshaft and from crankshaft we get the output.
Fig:
When the fuel will burn in the combustion chamber then the pressure and the temperature inside will increase because of the high pressure and temperature inside, this pressure force is applied to the piston and we get the work as the output which is called as Power displacement work.

Indicated Power:

The power obtained on the top of the piston after the fuel burn is called indicated power.

Brake power or Shaft Power:

Fuel power gets converted into indicated power and indicated power eventually converted into Brake power or shaft power.

Fuel Power:

To calculate the fuel power= Mass flow rate of fuel* Calorific valve.

Friction power:

Indicated power-Brake power= friction power

Internal Combustion engine efficiencies:

Indicated thermal Efficiency = Indicated power/fuel power * 100
Brake Thermal Efficiency= Brake power/fuel power * 100
Mechanical efficiency= Brake power/indicated power * 100
Relative Efficiency= Thermal efficiency/air standard efficiency.
Air Standard efficiency are otto, diesel cycle eficiency.
Volumetric efficiency= Actual volume suction/swept volume = Va/Vs.

1 comment:

  1. Punjab School Education Board has issued the PSEB 10th Model Paper 2022. Candidates can practise by downloading pdf files of past year exam papers from the Punjab board for class X. Aspirants will learn about the question paper by solving them, Punjab Board Matric Model Paper 2022 including the marking structure, types of questions asked, exam time, and so on. The PSEB Class 10th Exam 2022 will take place from April 9 to May 1, 2022. (tentative). For more information on PSEB 10th 2022 Model Paper, read the article.

    ReplyDelete