Determine the net work - mechanics, Mechanical Engineering

Assignment Help:

Determine the net work:

Q: 5 m3 of air at 2 bar, 27°C is compressed to 6 bar pressure following PV1.3  =C. It is expanded subsequently adiabatically to 2 bar. Considering two processes is to be reversed, determine the net work. Also plot the processes on T - S diagram.            

Sol: Given that:

Initial volume of air  V1  = 5 m3

Initial pressure of air P1  = 2 bar

Final pressure = 6 bar

Compression: Rev. Polytropic process (PVn  = C) Expansion :Rev. adiabatic process (PV14 = C) Now, work done during the process (1-2)

925_Determine the net work 1.png

1584_Determine the net work2.png

negative  sign shows that work input required for compression is more than work output obtained during expansion.


Related Discussions:- Determine the net work - mechanics

Production function for bicycles, Let B be the number of bicycles formed  f...

Let B be the number of bicycles formed  from F bicycle frames and T tires. Each bicycle require exactly two tires and one frame. a. Sketch the isoquants for bicycle production.

Show the types of changes in project, Q. Show the types of Changes in proje...

Q. Show the types of Changes in project? During the development and execution of a project, the following changes can occur:  Scope of work changes  Cost deviation

Throttling process - thermodynamics, Throttling Process: The expansion...

Throttling Process: The expansion of gas through an orifice or partly opened valve is called as throttling. q 1 -2 = 0 and w 1 -2  = 0 Now              The throt

Restricted search over all possible scheduling, Restricted Search over All ...

Restricted Search over All Possible Scheduling All options to this approach aim to calculate a schedule for a specific number of operations and after that to schedule the initi

Centrifugal air compressor, Centrifugal air compressor: A centrifugal...

Centrifugal air compressor: A centrifugal air compressor delivers 15Kg of air per minute. The outlet and inlet conditions are At inlet: Velocity = 5m/sec, enthalpy = 5KJ

Gyroscope, what is principle of gyroscope

what is principle of gyroscope

What are the disadvantages of not washing a motorcycle?, (a) What are the d...

(a) What are the disadvantages of not washing a motorcycle before servicing it? (b) List the parts on which water should not fall directly. (c) Write down the steps for washing and

Batteries and alternative sources of energy, Illustrate six typical applica...

Illustrate six typical application of primary cells. (b) Illustrate six typical applications of secondary cells. (c) Illustrate the advantages of a fuel cell over a conventional

What is the chief advantage of CIDR over addressing scheme, What is the chi...

What is the chief advantage of CIDR over the original classful addressing scheme? CIDR stands for Classless Inter-Domain Routing is a new addressing scheme for the Internet, th

Working principle of the petrol engine, W orking Principle of the Petrol E...

W orking Principle of the Petrol Engine: OTTO CYCLE     5-1 Suction Stroke 1-2 Adiabatic Compression Stroke 2-3 Heat Addition at the constant Volume.

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