8th Semester Mechanical Engineering VTU 2010 Scheme question papers till Jan 2019

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Coorg Institute of Technology, Department Of Library & Information Center , Ponnampet

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8th Semester Mechanical Engineering VTU 2010 Scheme question papers till Jan 2019

The dual cycle is an important part of I mechanical engineering. here I have to try to derive some of the rules and important parts. such as, 1.History 2.Comparison Between Otto, Diesel and Dual Cycle 3.Dual Combustion Engine 4.Characteristics 5.Parts Of Engine 6.Stroke 7.Sequence of Operations 8.Expression For Efficiency 9.Applications 10.Automobile 11.Generators/Aircrafts 12.Marine Engines I hope this will help you to get all your required information plz like it and share it. Connect with me on : Youtube: Harshal Bhatt Instagram: harshalbhatt_official Twitter: HarshalBhatt318 Snapchat: harshalbhatt31

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Watch Video of this presentation on Link: https://youtu.be/xIGlZ3UvLdw For notes/articles, Visit my blog (link is given below). For Video, Visit our YouTube Channel (link is given below). Any Suggestions/doubts/reactions, please leave in the comment box. Follow Us on YouTube: https://www.youtube.com/channel/UCVPftVoKZoIxVH_gh09bMkw/ Blog: https://e-gyaankosh.blogspot.com/ Facebook: https://www.facebook.com/egyaankosh/

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Steam turbine is an excellent prime mover to convert heat energy of steam to mechanical energy. Of all heat engines and prime movers the steam turbine is nearest to the ideal and it is widely used in power plants and in all industries where power is needed for process. In power generation mostly steam turbine is used because of its greater thermal efficiency and higher power-to-weight ratio. Because the turbine generates rotary motion, it is particularly suited to be used to drive an electrical generator – about 80% of all electricity generation in the world is by use of steam turbines. Rotor is the heart of the steam turbine and it affects the efficiency of the steam turbine. In this project we have mainly discussed about the working process of a steam turbine. The thermal efficiency of a steam turbine is much higher than that of a steam engine.

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PPT describes the engine performance parameters of the I.C. engine. Engine performance is an indication of the degree of success of the engine performs its assigned task, i.e. the conversion of the chemical energy contained in the fuel into the useful mechanical work. The engine performance is indicated by the term efficiency, η. Five important engine efficiencies and other related engine performance parameters are: Power Indicated Thermal Efficiency (ηith) Brake Thermal Efficiency (ηbth) Mechanical Efficiency (ηm) Volumetric Efficiency (ηv) Relative Efficiency or Efficiency Ratio (ηrel) Mean Effective Pressure (Pm) Specific Fuel Consumption (sfc) Fuel-Air or Air-Fuel Ratio (F/A or A/F) Calorific Value (CV) Power:- The main purpose of running an engine is to obtain mechanical power. Brake Power (B.P.) The power developed by an Engine at the output shaft is called the brake power. Brake Power= Brake Workdone/Time B.P.=BWD/sec. Indicated power (I.P.) The total power developed by Combustion of fuel in the combustion chamber is called indicated power. Indicated Power= Indicated Workdone/Time I.P.=IWD/sec. Frictional Power (F.P.) The difference between I.P. and B.P. is called frictional power (f.p.). FP = IP – BP Thermal Efficiency (ηth) Thermal efficiency is the ratio of Power to energy supplied by the fuel. ηth= Power/ Energy In I.C. Engine, thermal efficiency can be classified into two categories i.e. Indicated Thermal Efficiency (ηith) Indicated thermal efficiency is the ratio of indicated power to the heat supplied or added. ηith= IP/Qs 2. Brake Thermal Efficiency (ηith) Brake Thermal Efficiency is the ratio of brake power to the heat supplied or added. ηbth= BP/Qs Volumetric Efficiency (ηv) This is one of the most important parameters which decide the performance of four-stroke engines. Four stoke engines have distinct suction stoke, volumetric efficiency indicates the breathing ability of the engine. Volumetric efficiency is defined as the ratio of actual flow rate of air into the intake system to rate at which the volume is displaced by the system. ηv= (푚 ̇"a/a" )/(푉푑푖푠푝푎푐푒푑 푋 푁/2) "a"= Inlet density is taken atmospheric air density N= Number of the cylinder in use

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