Posts: 1,061
Threads: 613
Joined: Feb 2010
[attachment=2065]
REDUCED EMISSIONS OF OXIDES OF NITROGEN IN SHIP ENGINES
INTRODUCTION
Oxides of nitrogen emission from ship engines are significant on a global level. These emissions participate in the formation of photochemical smog and acid rain. Here we look at to some ways by which these emissions can be reduced.
Mechanism of NOx Formation in Diesel Engines.
At the temperature of the Burning of fuel spray (about 2000 K to 2500 K).
Nitrogen + Oxygen Oxides of Nitrogen
(mostly Nitric Oxide)
During expansion process and in exhaust.
Nitric Oxide NO2 and N2O
NOx Control Measures
1. Engine Tuning.
a. Intelligent Engines.
b. Injection Timing Retard.
c. Fuel Injector Valves and Nozzles.
d. Injection Rate Shaping.
e. Compression Ratio, Injection Timing and Injection Rate.
f. Scavenge Air Temperature.
2. Water Injection, Fuel/Water Emulsion, Humidification.
3. Exhaust Gas Recirculation.
4. Selective Catalytic Reaction.
CONCLUSION
Most engine manufactures are now producing standard engines. This has been achieved by engine tuning measures.
Posts: 7
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Joined: Aug 2010
send me report on reduced emission of oxides of nitrogen in ship engine
Posts: 7
Threads: 4
Joined: Aug 2010
send me reports on reduced emissions of oxides of nitroigen in ship
Posts: 4,190
Threads: 817
Joined: Feb 2012
REDUCED EMISSIONS OF OXIDES OF NITROGEN IN SHIP ENGINES
[attachment=17497]
INTRODUCTION
Oxides of nitrogen emission from ship engines are significant on a global level. These emissions participate in the formation of photochemical smog and acid rain. Here we look at to some ways by which these emissions can be reduced
Mechanism of NOx Formation in Diesel Engines
At the temperature of the Burning of fuel spray (about 2000 K to 2500 K).
Nitrogen + Oxygen Oxides of Nitrogen
(mostly Nitric Oxide)
During expansion process and in exhaust.
Nitric Oxide NO2 and N2O
NOx Control Measures
. Engine Tuning.
a. Intelligent Engines.
b. Injection Timing Retard.
c. Fuel Injector Valves and Nozzles.
d. Injection Rate Shaping.
e. Compression Ratio, Injection Timing and Injection Rate.
f. Scavenge Air Temperature.
2. Water Injection, Fuel/Water Emulsion, Humidification.
3. Exhaust Gas Recirculation.
4. Selective Catalytic Reaction.
Intelligent Engines.
Electronically controlled Camshaftless engines allow great flexibility for optimization of combustion process over the full range of operating conditions
