Internal Combustion Engines Power Questions

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Engineering

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Please check the attachment. Let me know if you have any question about anything. Answer all the questions in all of the groups.

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P = (n * (1/4) * D2 * L) * p*N p (Mean Effective Pressure, N/m²) N (number of firing strokes per second, P (Watts) n (Number of Cylinders) two-stroke N = revolutions per second, D (Piston Diameter, Meters) four stroke N = 1/2 revolutions per second L (Piston Stroke, Meters) Group 1 Scientific R&D Comparison of Internal Combustion Engines 1. /25 pts)Diesel fuel combustion occurs at T2 = 800 deg K. 1.a Req Complete Table A What is the recommended compression ratior for this to occur TABLE A Fuel Fuel Injection Minimum Compression Assume k=1.4 Temp Deg C(deg K) Ratio r Diesel 25 deg C (298 K) LNG + Diesel(small) 5 deg C (278K) 1.b Using this Energy/liter data, Estimate the increased injection ratio of LNG /diesel= Energy per liter MJ/L 35.8 (diesel) 22.2 MJ/L (LNG) 2 /30 pts) Comparison of n=8 cylinder, P= 350 kW Engine Designs Complete Table B TABLE B Engines Piston Dia, m N rpm Stroke, m Engine Bmep Ver 1 Two stroke 0.20 3,800 0.25 Ver 2 Four stroke 0.20 3,800 0.25 Ver 3 Four stoke 0.25 4,800 0.3 Group 2 Problems-Renewable Energy Process 3. /25 pts)Complete Table C Assume same engine Table C Ethanol 23.4 MJ/L Gasoline 32.9 MJ/L Blend MPG ref 35 mpg Blend Octane 120 Octane 90 Octane @ 100%gas No 1 33.3% 66.6% No 2 25.0% 75.0% Group 3 Problems - Technical Support and Sales 4. 20 pt Complete Table D for car (otto cycle) engine designs Assume Otto Engine CR = 9 for Reference. Table D Ethanol 23.4 MJ/L Gasoline 32.9 MJ/L Compression MPG ref 35 mpg Blend Octane 120 Octane 90 Ratio CR (1) @ 100%gas CR=9 No 1 33.3% 66.6% 16 No 2 25.0% 75.0% 14
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Hello fam, please find attached.

Running head: POWER QUESTIONS

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Power Questions
Student’s Name
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POWER QUESTIONS

2

Group 1: Scientific R&D: Comparison of Internal Combustion Engines

1. (25pts) Diesel Fuel Combustion Occurs at T2=800 deg K

1a) Complete Table A What is recommended compression ratio r for this to occur

Table A fuel

Fuel Injection

Minimum Compression

Ass...


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