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

Solve the gauss elimination method, a) By Gauss elimination method, solve ...

a) By Gauss elimination method, solve x+2y+z =3 ; 2x+3y+3z =10 ; 3x-y+2z =13 b) Write a ‘C' program to find the solution of the above system of equations by Gauss Jordan meth

Varignon, how should we consider positive or negative when summation of for...

how should we consider positive or negative when summation of forces

Applications and disadvantages of electro chemical machining, Applications ...

Applications and Disadvantages of Electro Chemical Machining Disadvantage of Electro Chemical Machining 1. The tools are more difficult to design. 2. Initial cost is hi

Used engine oil and hot engine parts , Used Engine Oil: Used engine oil ma...

Used Engine Oil: Used engine oil may cause skin disease if repeatedly in contact with the skin for prolonged time. It is advisable to thoroughly wash the hands with soap and water

Define the components in the step standard, Define the components in the ST...

Define the components in the STEP standard There are many components in the STEP standard. (i) The first component discusses the purpose of the standard. It contains :  (

Can you explain pattern allowances, Q. Can you explain Pattern Allowances? ...

Q. Can you explain Pattern Allowances? The difference in the dimensions of the casting and the patterns is due to the various allowances considered while designing a pattern fo

Automobile, what is internal combustion engine

what is internal combustion engine

Battery charger-electrical instruments , Battery Charger: As suggested by ...

Battery Charger: As suggested by the name, it is used to charge a battery. The detailed procedure for charging a battery is given in later units. List the uses of following too

2 degree freedom of system, A mechanical System (two degrees of freedom sys...

A mechanical System (two degrees of freedom system) is represented by the following two differential equations: m1x"1+(k1+k2)x1-k2x2=0 m2x"2-k1x1+(k2+k3) x2=0 Given m1=m2=0.5kg, k

Illustrate centrifugal tension of belt drive, Illustrate the following term...

Illustrate the following terms:- a) Mechanism and Inversion b) Slip and Creep of belt drive c) Centrifugal Tension of belt drive d) Initial Tension of belt drive

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