Thermal efficiency and compression ratio, Mechanical Engineering

Assignment Help:

Thermal efficiency and compression ratio:

Calculate thermal efficiency and compression ratio for automobile working on otto cycle. If energy generated per cycle is thrice which of rejected during the exhaust. Consider fluid as an ideal gas with = 1.4       

Sol.: Since we have

Where

Wotto = (Q1  - Q2)/Q1

Q1 = Heat supplied

Q2 = Heat rejected

Given that     Q1 = 3Q2

otto = (3Q2  - Q2)/3Q2  = 2/3 = 66.6%                                                   ...(i)

We also have;

Qotto = 1 - 1/(r)  - 1

0.667 = 1/(r)1.4 - 1

r = (3)1/0.4  = 15.59

 


Related Discussions:- Thermal efficiency and compression ratio

Necessity of cooling system , Necessity of Cooling System To preve...

Necessity of Cooling System To prevent the engine from excessive heating. To avoid the piston seizure due to thermal expansion. To prevent burning of lubricant a

Determine strain using wheatstone bridge, a) Can you explain Discuss LVDI i...

a) Can you explain Discuss LVDI in detail. b) Derive the expression for calculating strain using wheatstone bridge. c) Distinguish between analog and digital transducers.

Mechanical design of the blowdown systems, Q. Mechanical design of the blow...

Q. Mechanical design of the blowdown systems? Mechanical design of the blowdown systems shall be sized for a continuous blowdown of a minimum of 1.0% of MCR. Fabricator may re

Determine the wire diameter of the inner spring, Determine the wire diamete...

Determine the wire diameter of the inner spring: In a compound helical spring, the inner spring is arranged in and concentric with the outer one, but is 10 mm shorter. The out

Kkleins constraction, What is the limition of kkleins constraction?

What is the limition of kkleins constraction?

Introduction to computer, Introduction to Computer: This covers the ma...

Introduction to Computer: This covers the major hardware features of computer graphics systems such as video monitors, keyboard, hard copy devices, and other devices for graph

Surface modeling, SURFACE MODELING: The process of modeling is built m...

SURFACE MODELING: The process of modeling is built much easier for a mathematical description of an object or at least on a part of the object might be applied. Surfaces might

Statics, what are the common application of statics in industry

what are the common application of statics in industry

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd