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

Zeroth law - thermodynamics, Equalit y of Temperature: Two systems ar...

Equalit y of Temperature: Two systems are having equal temperature if there are no changes in their properties when they are kept in thermal contact with each other. Zer

Hodgkin-huxley fast subsystem, Hodgkin-Huxley Fast Subsystem 1. Explai...

Hodgkin-Huxley Fast Subsystem 1. Explain why replacing the extracellular Na + with choline has little effect on the resting potential of an axon. Calculate the new resting po

[email protected], how i can know moulair plant calculation?

how i can know moulair plant calculation?

Clausius statement - thermodynamics, Clausiu s statement: It is impos...

Clausiu s statement: It is impossible to construct this type of H.P. which operates on cyclic process and allows transfer of heat from colder body to a hotter body without th

Determine the lateral shift-sketch the beams, Transmission Through a LiNb0 ...

Transmission Through a LiNb0 3 Plate Examine the transmission of an unpolarized He-Ne laser beam (λ o = 633 nm) normally incident on a LiNb0 3 plate (ne = 2.29, no = 2.20) of th

Efficiency test on sand blasting, Efficiency Test on Sand Blasting:   ...

Efficiency Test on Sand Blasting:             After the study on sand blasting, the result was acceptable and the next step is planning to make order for new machine and searc

Determine the stresses in the shell, Determine the stresses in the shell: ...

Determine the stresses in the shell: A cylindrical boiler is 2.5 m in diameter and 20 mm in thickness and it carries steam at a pressure of 1.0 N/mm2. Determine the stresses i

Choose a wire rope for a vertical mine hoist, Choose a wire rope for a vert...

Choose a wire rope for a vertical mine hoist to lift a load of 55 kN from a depth of 300 metres. A rope speed of 500 metres/min is to be attained in 10 seconds.

Aircraft characteristics - military and civil aircraft, Aircraft Characteri...

Aircraft Characteristics For planning and designing airport facilities, it is necessary to be conversant with the following important characteristics: (a) speed (b) size

Key words related to railways, Keywords: Degree of Curve      :      ...

Keywords: Degree of Curve      :            The angle subtended at the centre by a chord of 100 ft (30.5 m) length. Super-elevation (cant)        :            The raising

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