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

Key words related to air transportation, Keywords related to Air transporta...

Keywords related to Air transportation: Airfield/Airport       :            The area which contains the facilities needed for the operation of aircraft. Apron

What are the types of boundary layer, What are the types of Boundary Layer ...

What are the types of Boundary Layer and what do you understand by separation of Boundary layer. Can you Derive Hagen Poiseulle formula. Aslo illustrate Reynold's No.

Closed, Closed, open and isolated system-Thermodynamics system: Sol: ...

Closed, open and isolated system-Thermodynamics system: Sol: In thermodynamics the system can be defined as the quantity of matter or region in space upon which attention is

Quality control specialist, At site locations, the WorleyParsons QC Special...

At site locations, the WorleyParsons QC Specialist (QCS) is responsible to verify that the requirements for PMI as specified in the purchase order/subcontract documents are impleme

Magnetic device with moving iron element , A singly excited magnetic device...

A singly excited magnetic device with a moving iron element is illustrated in the figure below. g = 0.10 mm d = 2.0 cm b = 3.0 cm Assume the mmf in the iron and th

Applications of high temperature materials, Q. Applications of high tempera...

Q. Applications of high temperature materials? A brief description of materials of construction used for common high temperature components in furnaces, boilers, superheaters,

Mechanical properties of materials, A tensile test on a specimen having an ...

A tensile test on a specimen having an initial diameter of 13.11 mm and an initial gauge length of 200.0 mm, gave the following data:

Coil-fundamentals of electricity , Coil: A coil is used in ignition s...

Coil: A coil is used in ignition system to increase the voltage supplied by the battery or magneto. Coil

Determine the thermal conductivity, A rod of 80mm diameter and 10mm length ...

A rod of 80mm diameter and 10mm length with thermal conductivity 16W/m-deg protrudes from a surface at 160 o C. The rod is exposed to air at 30 o C with convective coefficient of

Evaluate the shaft diameter, The shaft, as given in Figure is driven by pul...

The shaft, as given in Figure is driven by pulley B from an electric motor. Another belt drive from pulley A is operating a compressor. The belt tensions for pulley A are 1500 N an

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