Determine net work done, Mechanical Engineering

Determine net work done:

5m3 of air at 2bar, 270C is compressed to 6bar pressure following PV1.3  = constant. It is expanded subsequently adiabatically to 2 bar. Considering two processes to be reversible, determine net work done, and also plot the processes on T - S diagrams.                                                                                                                                        

Sol:  V1 = 5m3, P1  = P3 = 2bar, P2  = 6bar, and n = 1.3

V2 = V1(P1/P2)1/1.3  = 5(2/6)1/1.3  = 2.147m3

Thus work done during process 1 - 2 is W1-2

= (P2V2  - P1V1)/(1- n)

= (6 × 105  × 2.47 - 2 x 105  × 5)/(1-1.3) = - 9.618 × 105  J

Likewise to obtain work done during processes 2 - 3, we apply

W2-3 = (P3V3  - P2V2)/(1 -   ); where      = 1.4

And V3 = V2(P2/P3)1/   = 2.147(6/2)1/1.4  = 4.705m3

2230_Determine net work done.png

199_Determine net work done10.png

 

Posted Date: 10/15/2012 9:03:18 AM | Location : United States







Related Discussions:- Determine net work done, Assignment Help, Ask Question on Determine net work done, Get Answer, Expert's Help, Determine net work done Discussions

Write discussion on Determine net work done
Your posts are moderated
Related Questions
draw the projection of pentagonal pyramid have 30 mm edge and axis 50 mm long having base on hp and an edge of the box parallel to vp

Calculate stress intensity factor: For the plate in Figure (a) W = 25 mm, 2a = 10 mm, plate thickness, t = 2 mm, Load P = 1000 N. Calculate stress intensity factor if length o

Engine oil level and viscosity : Ensure that the engine oil level is maintained till the upper mark on the gauge oil level. Check engine oil viscosity. Oil should not be abnormall

Solve the following two questions of the truss. Note that A and G are pin supports.  1)  Sketch the influence lines for the force in bar DG (the load is moving on the top chord

Determines the effect of price reduction: In order to enhance the sales, management of Quality ice-cream company decided to give discounts in the sale of one and half liter pa

Static Friction: When applied force is less than limiting friction, body remains at rest and this type of frictional force is called as static friction and this law is called as l

Age-hardening of Aluminium Alloys In specific alloys precipitation from a single phase may arise. The precipitate phase might be in form of determine sub-microscopic particles

A cantilever of length 2m carries a uniformly distributed load of 1.5 KN/m run over the whole length and appoint load of 2KN at a distance of 0.5 from the free end draw the Shear

Function of heat pump: Refrigerator The primary function of heat pump is to transfer heat from the low temperature system to the high temperature system, this transfer of

Camshaft : The camshaft controls the opening and closing of the two valves. The associated parts are push rods, rocker arms and valve springs. The camshaft is driven by a camchai