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

Strength of materials, The figure shows a particular point of the connectin...

The figure shows a particular point of the connecting rod BA and crank AO. At this position the rod the engine exacts a force 2500N on the crank oin at A. Resolve this force into h

Fluid mechanics, A cart is moving along a track at a constant velocity of 5...

A cart is moving along a track at a constant velocity of 5 m/s as shown. Water (? = 1000 kg/m3) issues from a nozzle at 10 m/s and is deflected through 180° by a vane on the cart.

Explain the information phase of radial drilling machine, Information Phase...

Information Phase: Step: To secure all and complete information and gather facts and from best sources.   Our project is selected based on the current problem face by the

Inertia force analysis, what is the role of a correction couple and how doe...

what is the role of a correction couple and how does it come into picture in dynamically equivalent system?

Flight of the bumblebee, Flight of the Bumblebee Railroad train T a le...

Flight of the Bumblebee Railroad train T a leaves station A at a uniform speed of 30mph toward station B. Train Tb leaves station B at a uniform speed of 20mph toward station

Deadlock-able non-resolvable net system, See the Petri net represent in fol...

See the Petri net represent in following figures (a) and (b) as represented in the figure for analysis and depiction of qualitative pathological behaviors. Figure: (a): An

Couple, What are properties of couple

What are properties of couple

Compute model on simulate the tossing of thee four coins, Four (04) coins a...

Four (04) coins are tossed simultaneously (ie at the same time) and results in either a HEADS or a TAILS in each coin. Develop a simple computer model on MS EXCEL to simulate the t

Essay, which topics i should take from mechanical engineering to compare th...

which topics i should take from mechanical engineering to compare them

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