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

Dynamic machine routing, Dynamic Machine Routing  Machine routing ident...

Dynamic Machine Routing  Machine routing identifies the machines that are needed for each of the operation of a given job. Within the JSP or Job Shop Scheduling Problem model,

Evaluate the principal stresses and principal planes, At a fixed point in a...

At a fixed point in a strained material the intensities of normal stress on the planes at right angles to each other are 20 N/mm 2 and 10 N/mm 2 . Evaluate the principal stresses

Strength of materials, sir/madam, i would like to teach online how can i ha...

sir/madam, i would like to teach online how can i have to proceed

Probability, Airlines like to overbook their flights (this is a vibrant are...

Airlines like to overbook their flights (this is a vibrant area of research called yield management). It is estimated that 10% of the people who book their flight do not show up. H

Actual vapour compression cycle, diffrence between actual and idealactual v...

diffrence between actual and idealactual vapour compression cycle

Explain power transmission systems, The basic power transmission systems ar...

The basic power transmission systems are 1. Belt drive 2. Chain drive and 3. Gear drives. Belt drive is commonly used for transmission of power when exact velocity rat

Calculate the value of the gravitational force, Problem - Newton's Second L...

Problem - Newton's Second Law in 1D Newton's Second Law of Motion says that the vector sum of the forces acting on an object equals the object's mass times its acceleration.  Ma

Order sequences and order release, Order Sequences and Order Release Fo...

Order Sequences and Order Release For this system, sequences of orders for particular parts (batch size 1) are produced in the following way: for each machine, here is, for eac

What is octree encoding, What is Octree Encoding Octress are hierarchic...

What is Octree Encoding Octress are hierarchical variant of spatial-occupancy enumeration, designed to address that approach's demanding storage requirements. Octress are in tu

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