14-11-2012, 05:47 PM
ABOUT HYDROGEN:
ABOUT HYDROGEN.ppt (Size: 106.5 KB / Downloads: 25)
Combustive properties of hydrogen
Wide range of flammability :
Hydrogen can be combusted over wide range of f/a mixture. It can run on lean mixture which results in complete combustion and low exhaust emission.However lean operation can reduce power o/p .
Low ignition energy :
The energy needed to ignite H2 is less which enables H2 engine to ignite lean mixture.Hot gases & hot spots in cylinder acts as ignition source which leads to pre ignition & backfire.
Small quenching distance:
H2 flame travels closer to the cylinder wall than gasoline flame,thus it is difficult to quench the H2 flame.
What will we do in next semester
1.Assembly of different components like 2-stroke SI engine, hydrogen cylinder, vapourizer, hydrogen regulator, dynamometer, exhaust gas analyzer.
2.Calculation of torque using rope break dynamometer and R.P.M using digital tachometer.
3.Analysis of exhaust gas composition by using exhaust gas analyzer.
4. Additional cooling system.
5.