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

Thermal stress, Derivation of formula of thermal stress

Derivation of formula of thermal stress

Find speed for two hours with hss tools, Find speed for two hours with HSS ...

Find speed for two hours with HSS tools Find speed for two hours tool life for dry machining of free cutting mild steel with HSS tool. Solution From Table 3, a value o

Bending strength machine, what is bending strength machine parts of bendin...

what is bending strength machine parts of bending strength machine and description about different parts of bending strength machine description about bending srength machine and

Properties of aluminium alloys, Properties of Aluminium Alloys: Among...

Properties of Aluminium Alloys: Among the different properties of aluminium alloys given are notable as: (a) Low density as 2.7 gm/cc (b) Elevated electrical and therma

Example of shear force and bending moment diagram, Example of Shear force a...

Example of Shear force and bending moment diagram: Q: Draw the Shear Force and bending moment diagram for the simply supported beam loaded as shown in the figure given belo

Free body diagrams of cylindrical rollers - mechanics, Free body diagrams o...

Free body diagrams of cylindrical rollers: The t wo cylindrical rollers A and B which are identical, each having weight W are supported by an inclined plane and vertic

Compare otto cycle with diesel cycle, Compare otto cycle with Diesel cycle:...

Compare otto cycle with Diesel cycle: Sol.: These two cycles can be compared on the basis of either the same compression ratio or the same maximum pressure and temperature.

Terminal nut-terminologies of spark plug , Terminal Nut: This is a detach...

Terminal Nut: This is a detachable type of terminal nut. The high tension (HT) cord is connected here. This is also available in non-detachable type. Figure: Spark Plug

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