a) The facility is using two diesel powered generators to provide electricity if there is a power failure. One is an old one which uses 2 stroke cycles and the other one is a brand new one which uses 4 stroke operating cycle. Following information has been written on the name plate of the brand-new generator but the information of the old generator is missing. It was known that the old generator is also a rare V8 engine (2 stroke) engine with an engine speed of 350 RPM. and the power output is the same as the brand-new generator. Table 1- Name tag of the brand-new generator # 1 2 3 4 Description Engine Type KVA/KW BHP Bore Stroke (mm) Displacement (Litres) Compression Ratio 6 7 Aspiration Firing order 8 9 Cooling System 10 Mean Effective Pressure 11 Engine RPM 12 Brake Torque 13 Rotation 14 SFC@g/Kw hr 500KVA V8 500/400 652 130*154 (200/ 16.4 L 16.7: 1 Natural 1-5-4-2-3-7-8 Liquid cooling (700 +25) KN/m² ) + (1000 ) Rev/min 1880 + 204 Nm Anticlockwise when viewed from the flywheel end 100% 75% 50% 204 210 211 Determine the following for each engine, 1. Indicated Mean effective Pressure & Indicated power of each engine 2. Brake Mean effective pressure & brake power of the engine. Thus, evaluate the mechanical efficiencies of each engine. Explain why these values differs with each other.

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter9: Automotive Engine Designs And Diagnosis

Section: Chapter Questions

Problem 15RQ: Which of the following is an expression of how much of the heat formed during the combustion process...

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Transcribed Image Text:a) The facility is using two diesel powered generators to provide electricity if there is a power failure. One is an old one which uses 2 stroke cycles and the other one is a brand new one which uses 4 stroke operating cycle. Following information has been written on the name plate of the brand-new generator but the information of the old generator is missing. It was known that the old generator is also a rare V8 engine (2 stroke) engine with an engine speed of 350 RPM. and the power output is the same as the brand-new generator. Table 1- Name tag of the brand-new generator # 1 2 3 Description Engine Type KVA/KW BHP 4 Bore Stroke (mm) 5 Displacement (Litres) 6 Compression Ratio 7 Aspiration Firing order 8 9 Cooling System 10 Mean Effective Pressure 11 Engine RPM 12 Brake Torque 13 Rotation 14 SFC @g/Kw hr 500KVA V8 500/400 652 130*154 16.4 L 16.7: 1 (200/ Natural 1-5-4-2-3-7-8 Liquid cooling (700 +25 p) KN/m² ) + (1000 ) Rev/min 1880 + 204 Nm Anticlockwise when viewed from the flywheel end 100% 75% 204 210 50% 211 Determine the following for each engine, 1. Indicated Mean effective Pressure & Indicated power of each engine 2. Brake Mean effective pressure & brake power of the engine. Thus, evaluate the mechanical efficiencies of each engine. Explain why these values differs with each other.

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