Transcription of 9. DG SET SYSTEM
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9. DG SET SYSTEM
9. DG SET SYSTEM165 Bureau of Energy EfficiencySyllabusDiesel Generating SYSTEM :Factors affecting selection, Energy performance assessment ofdiesel conservation IntroductionDiesel engine is the prime mover, which drives an alternator to produce electrical energy. Inthe diesel engine, air is drawn into the cylinder and is compressed to a high ratio (14:1 to25:1). During this compression, the air is heated to a temperature of 700 900 C. A meteredquantity of diesel fuel is then injected into the cylinder, which ignites spontaneously becauseof the high temperature. Hence, the diesel engine is also known as compression ignition (CI)engine. DG set can be classified according to cycle type as: two stroke and four stroke. However,the bulk of IC engines use the four stroke cycle. Let us look at the principle of operation of thefour-stroke diesel Stroke - Diesel Engine The 4 stroke operations in a diesel engine are: induction stroke, compression stroke, ignitionand power stroke and exhaust :Induction stroke - while the inlet valve is open, the descending piston draws infresh :Compression stroke - while the valves are closed, the air is compressed to a pressure ofup to 25 :Ignition and power stroke - fuel is injected, while the valves are closed (fuel injectionactually starts at the end of t)
9. DG SET SYSTEM Bureau of Energy Efficiency 165 Syllabus Diesel Generating system: Factors affecting selection, Energy performance assessment of diesel conservation avenues 9.1 Introduction Diesel engine is the prime mover, which drives …
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