Q5: A 5.6 litre V8 engine with a compression ratio of 9.4:1 operates on an air-standardOtto cycle at 2800 RPM, with a volumetric efficiency of 90 % and a stoichiometricair-fuel ratio using gasoline. The exhaust flow undergoes a temperature drop of44ºC as it passes through the turbine of the supercharger. Calculate (a) mass flowrate of exhaust gas and (b) power available to drive the turbocharger compressor.

Answered: Q5: A 5.6 litre V8 engine with a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Cylinder conditions at the start of compression in a spark ignition engine operating atwide open throttle on an air-standard Otto cycle are 60oC and 98kPa.The engine has a compression ratio of 9.5:1 and uses petroleum with an air-fuel ratio(AF) of 15.5.Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual.If the petroleum has a heating value (QHV) of 43kJ/kg,Calculate the following: 1) Temperature in oC and Pressure in kPa at all states in the cycle 2) Specific work done during the power stroke in kJ/kg 3) Heat added during combustion in kJ/kg 4) Net specific work done in kJ/kg5) Indicated thermal efficiency
1. An engine operates on the air-standard diesel cycle. The condition at the start of compression are 27 degree celsius and 100kPa. The heat supplied is 1840kJ/kg, and the compression ratio is 16. Determine the maximum temperature and pressure, the thermal efficiency and the mean effective pressure. 2. Calculate the bore and stroke of a six-cylinder engine that delivers 22.4 kW at 1800 rpm with a ratio of bore to stroke of 0.71. Assume the mean effective pressure in the cylinder is 620 kPa and the mechanical efficiency is 85%. 3. A spark-ignition engine produce 224 kW whle using 0.0169 kg/s of fuel. The fuel has a higher heating value of 44 186 kJ/kg, and the engine has a compression ratio of 8. The friction power is found to be 22.4 kW. Determine the brake thermal efficiency, mechanical efficiency,and the rest of the efficiencies.
Q6: A turbocharged engine with a compression ratio of 8 is being designed using an air standard cycle. The ambient air is assumed to be 300K and 100 kPa. The temperature at the end of the compression in the cylinder is desired to be 1000K, assuming no combustion prior to reaching TDC. At the end of the cylinder expansion the temperature is also desired to be 1000K. If both the turbine and the compressor have mechanical efficiencies of 80%, what will be the pressure ratio of the compressor and what will be the turbine exhaust temperature?
01 Two engines are to operate on Otto and Diesel cycles with the following data: Maximum temperature 1400 K, exhaust temperature 700 K. State of air at the beginning of compression 0.1 MPa, 300 K. Estimate the compression ratios, the maximum pressures, efficiencies, and rate of work outputs (for 1 kg/min of air) of the respective cycles.
Q1/An air-standard Diesel cycle absorbs 1500 J-mol-1 of heat. The pressure and temperature at the beginning of the compression step are 1 bar and 20°C, and the pressure at the end of the compression step is 4 bar. Assuming air to be an ideal gas for which CP = (7/2)R and CV = (5/2)R, what are the compression ratio and the expansion ratio of the cycle?
Q7: An automobile has a 3-liter SI V6 engine that operates on a 4-stroke cycle at 3600 rpm and produces a brake output torque of 205 N.m. The engine is squared and its compression ratio equals 9.5. At this speed air enters the cylinders at 85 kPa and 60°C, air-fuel ratio equals 15, and the mechanical efficiency of the engine is 85%. Take the heating value of fuel equals to 44 MJ/kg. Calculate: bore, stroke, mean piston speed, clearance volume per cylinder, brake power, indicated power, bmep, imep, bsfc, indicated thermal efficiency, brake thermal efficiency and the volumetric efficiency.
John’s automobile has a three-liter SI-V6 engine that operates on a four-stroke cycle at 3600 RPM. The compression ratio is 9.5, the length of connecting rods is 16.6 cm, and the engine is square (B=S). at this speed, combustion ends at 20o at T.D.C. This engine is connected to Dynamometer which gives a brake output torque reading of 205 N-m. At his speed, air enters the cylinders at 85 kPa and 60o C, and the mechanical efficiency of the engine is 85%. Calculate: (a) Brake power, HP || (b) Indicated Power, HP || (c) Brake Mean Effective Pressure, Bmep , Psia || (d) Indicated Mean Effective Pressure, Imep, Psia || (e) Friction Mean Effective Pressure, Fmep, Psia
1. Cylinder conditions at the start of compression in an SI engine operating at WOT on an air-standard Otto cycle are 60°C and 98 kPa. The engine has a compression ratio of 9.5:1 and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual. Heating value of the fuel is about 44MJ/kg. Calculate: (a) Temperature at all states in the cycle. [°C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. [kJ/kg] (e) Net specific work done. [kJ/kg] (f) Indicated thermal efficiency. [%]
Sketch the air-standard otto ott Diesel cycle on P-V and T-S diagrams. Two engines are to operate on Otto and diesel cycles with the following data; Maximum temperature 1400K, exhaust temperature 700K, state of air at the beginning of compression is 0.1 Mpa and 300k. Compare for 1kg/min of air for respective cycles; i) Compression ratios ii) Maximum pressures iii) Thermal efficiencies iv) Rate of work output
An ideal dual cycle internal combustion engine has a compression ratio of 13, a cutoff ratio of 1.2, and a pressure ratio of 1.3. The cycle takes in air at 313K and 40OkPa. Utilizing the cold air standard assumptions and assume the following properties of air stay constant throughout the cycle: Cp=1.005 kJ/(kg•K), cv=0.718 kJ/(kg•K), R=0.287 kJ/(kg•K), and k=1.4. Determine the following: a.) The maximum pressure of the cycle b.) The maximum temperature of the cycle c.) The amount of heat added d.) The thermal efficiency of the cycle P 3 qin 4 Jout 1
An SI engine operating on an four-stroke air-standard cycle using stoichiometric gasoline is to have a maximum cylinder pressure of 11,000 kPa at WOT. Inlet pressure can be 100 kPa without supercharging, or it can be as high as 150 kPa with a supercharger. Pick a compression ratio and inlet pressure combination to give maximum indicated thermal efficiency
MTQ5 At the beginning of the compression process of an air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and mass flow rate in the system is 1900 kg/hr. Cp = 1.006 kJ/kg K Cv = 0.717 kJ/kg K

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS