Question

Give me answers

What is Break Thermal efficiency, Relative efficiency, Volumetric efficiency and Air standard efficiency. ?

Jldiii kro ! ​

Answer 1

${\bold{\underline{\underline{Answer:}}}}$

Brake Thermal Efficiency : The ratio of heat equivalent to the actual power output of the engine to the heat supplied by the fuel in the same time is called Brake Thermal Efficiency.

$\implies$ Brake thermal efficiency

= $\frac{ Heat\:equivalent\:to\:BHP/min}{Heat\:supplied\:by\:fuel/min}$

Relative Efficiency : The ratio of thermal efficiency to the air standard efficiency is called Thermal Efficiency.

Relative efficiency = $\frac{Thermal\:efficiency }{Air\:standard\:efficiency}$

Volumetric Efficiency : The ratio of the actual volume of air or charge admitted into the cylinder during the suction stroke at N.T.P. to the piston displacement is called Volumetric Efficiency.

$\implies$ Volumetric efficiency

= $\frac{Volume\:of\:air\:admitted\:during\:sucti on\:stroke\:at\:N.T.P}{Piston\:displacement}$

Air Standard Efficiency : The ratio of heat converted into work per cycle to the heat input per cycle is called Standard Efficiency.

$\implies$ Standard efficiency

= $\frac{Heat\:converted\:into\:work\:per\:cycle}{Heat\:input\:per\:cycle}$

Answer 2

Answer:

Volumetric efficiency is the ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston while mechanical efficiency is the ratio of the brake power to the indicated power and relative efficiency is the ratio of the indicated thermal efficiency to the air standard efficiency ...