Estimate temperature of air at exit from compressor , Mechanical Engineering

Assignment Help:

Estimate temperature of air at exit from compressor:

The air compressor compresses atmospheric air at 0.1MPa and 270C 10 times the inlet pressure. During compression heat loss to surrounding is estimated to be 5 percent of compression work. Air enters compressor with the velocity of 40m/sec and leaves with 100m/sec. The inlet and exit cross section area are 100cm2 and 20cm2 respectively. Estimate temperature of air at exit from compressor and power input to the compressor.                                        

Sol: Given that;

At inlet: P1  = 0.1MPa; T1  = 27 + 273 = 300K; V1  = 40m/sec; A1  = 100cm2

At exit:                P2  = 10P1  =   1.0MPa; V2  = 100m/sec;  A2  = 20cm2

Heat lost to surrounding = 5 percent of compressor work

As Mass flow rate mf  = A1.V1/  1  = A2.V2/   2;

1726_Estimate temperature of air at exit from compressor.png

From equation (2) mf  = (100 × 10-4 × 40)/ 0.8601 = 0.465kg/sec

mf = 0.465kg/sec          

 By applying SFEE to control volume:

1357_Estimate temperature of air at exit from compressor1.png

negative sign is inserted as the work is done on the system

1308_Estimate temperature of air at exit from compressor2.png

WS = -592.44 KJ/sec        .......ANS

-ive sign shows work done on system

-Power input required to run compressor is 592.44KW


Related Discussions:- Estimate temperature of air at exit from compressor

Methods of analysis of trusses, Methods of analysis of trusses: What ...

Methods of analysis of trusses: What are the methods of analysis of trusses? What is found when the analysis of a system is done? Sol.:  The forces in the members of

Find the stresses by finite method, The stepped bar in Fig Q6 is stretched ...

The stepped bar in Fig Q6 is stretched along the vertical axis and the maximum upward displacement is found to be 0.008 m. The bar has cross-sectional areas of A 1 and A 2 ov

Arm programming, In order to get your first experience of ARM programming, ...

In order to get your first experience of ARM programming, this way you are familiar with the problem itself, its design, its flow of execution and you can use your own C code as ps

Essence of second law - thermodynamics, Essence of Second Law: Sol: ...

Essence of Second Law: Sol: First law deals with conservation and conversion of energy. But it fails to state the conditions under which the energy conversion are possible.

Thermodynemics, explain the following terms in brief:- point function and p...

explain the following terms in brief:- point function and path funtion

Determine in detail about the depth of foundation, Location with Respect to...

Location with Respect to Depth The depth below ground level at which the bottom of a foundation structure is located depends on number of factors, the most important of which

What are the types of material used for making spanners?, (a) What are the ...

(a) What are the types of material used for making spanners? What are the uses of spanners? (b) Write down the uses of following tools and make neat sketches of the same : (i

Hydraulic systems analysis, 1. A hydraulic pump generates 240W and supplies...

1. A hydraulic pump generates 240W and supplies hydraulic fluid at a rate of 5.1l/min to a linear actuator which has a bore size of 50 mm and a double piston rod diameter of 20mm.

Gripper design, what are the necessery calculation required to design a gri...

what are the necessery calculation required to design a gripper?

#, parameters in designing a presure vessels

parameters in designing a presure vessels

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