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

Tank drainage-apparent viscosity-laminar flow, Tank Drainage A large op...

Tank Drainage A large open vertical tank has three small, smooth, well-rounded orifices spaced equidistantly at ¼ h , ½ h , ¾ h up from the bottom of the tank (Fig. Q1). Water

MOTORSPORT VEHICLE CONSTRUCTION, MODIFICATIONS REQUIRE FOR A ROAD CAR TO EN...

MODIFICATIONS REQUIRE FOR A ROAD CAR TO ENTER A HILL CLIMB

Determine concept of hydrostatic sensor paver machine, Determine concept of...

Determine concept of Hydrostatic sensor paver machine A sensor asphalt paver is a machine used to deal out, shape, and partially compact a layer of asphalt on the surface of a

Define specific volume (v) of System, Define Specific Volume (v) It is ...

Define Specific Volume (v) It is illustrated as volume occupied by the unit mass of the system. Its unit is m 3 /kg. Certain volume is reciprocal of density. ν = v/m; m 3 /k

Determine the critical load, Determine the critical load (W crit ) to ...

Determine the critical load (W crit ) to cause elastic instability of the rigidly jointed frame shown in Figure Q2. The frame members have constant bending stif

Evaluate the net work done by the gas, An ideal gas is heated at fixed volu...

An ideal gas is heated at fixed volume until its temperature is 3 times the original temperature. It is then expanded isothermally till it reaches original pressure. The gas is t

Describe the type of facing and backing sand, Q. Describe the type of Facin...

Q. Describe the type of Facing and Backing sand? Facing sand. This sand is used directly next to the surface of the pattern and comes into contact with the molten metal when th

Plate clutch lifter bolts for even tightening, Plate clutch lifter bolts fo...

Plate clutch lifter bolts for even tightening : Reset clutch assembly using plate lifter clutch alignment tool.

Air filter cleaning steps, Air Filter Cleaning :  Air filter filters the a...

Air Filter Cleaning :  Air filter filters the air, which enters into the carburetor. Then, this air mixes with fuel and this mixture enters into engine. If air is not clean, it wi

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