Please help!!!!! An ideal air-standard Otto cycle engine has a compression ratio of8. At the beginning of the compression process, the working fluid isat 100 kPa and 300 K, and 800 kJ/kg heat is supplied during theconstant volume heat addition process. Neatly sketch the pressure-volume diagram for this cycle, and using the specific heat valuesfor air (Cv=0.834 kJ/kgK and y=C₁/Câ=1.344), calculatea) the temperature and pressure of the air at the end of eachprocess.b) the net work output/cycle [kJ/kg], andc) the efficiency [n] of this engine cycle.Pressure.VolumeFigure 8.9: Air-standard Otto cycle.

Here we will apply the basic equation of the heat and work for the respective processes to get the…

Answered: An ideal air-standard Otto cycle engine…

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

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A compression ratio of 8 is achieved by using an ideal air-standard Otto cycle engine. The working fluid has a pressure of 100 kPa and a temperature of 27°C at the start of the compression process, and the constant volume heat addition process supplies 800 kJ/kg of heat to the working fluid. What are the (a )the temperature, volume and pressure of the air at the end of each process (in K, m3 and kPa) (b) the net work output/cycle [kJ/kg], and (c) the thermal efficiency of this engine cycle
the compression ratio of an ideal Otto cycle is 8. Pressure of air at the beginning of the isentropic compression process 95 kPa, Temperature 27 °C and constant volume input to the cycle is 750 kJ / kg. Consider that the specific constant is taking; which of the following are the temperature and pressure values at the end of the heat input into the cycle? (Cp=1.005 kJ/ups, C, =0.718 kJ / ups, R=0.287 kJ/ups, k=1.4) Please select one: a.4392 КРа 1534к O b.4392 Pa 1534 K с. 439.2 КРа 1734 К d.439.2 kPa 1534 K e.4392 kPa 1734 K
A four-cylinder, four-stroke engine has a displacement volume of 300 cc (cubic centimeter) per cylinder. The compression ratio of the engine is 10 and operates at a speed of 3000 rev/min. The engine is required to develop an output of 40 kW at this speed. Calculate the cycle efficiency, the necessary rate of heat addition, the mean effective pressure, and the maximum temperature of the cycle. The inlet conditions are 1 .1bar and 30 deg.C, respectively. Analyze using the Otto cycle and Diesel cycle. Compare the results.
sars. 16-14M The air at the beginning of the compression stroke of an air-standard Otto cycle is at 0.95 bar and 22°C, and the cylinder volume is 5600 cm³. The compression ratio is 9, and 8.6 kJ are added during the heat-addition process. Calculate (a) the temperature and pressure after the compression and heat-addition processes, and (b) the thermal efficiency.
An ideal two-stroke diesel engine has a compression ratio of 21 and uses air as the working fluid. The state of air at the beginning of the compression process is 70°C and 97 kPa. The engine has four cylinders with a total capacity of 2200 cc. Assuming a cut-off ratio of 1.8 and using the cold-air-standard assumptions, determine how much power the engine will deliver at 3500 rpm. P, qin Isentropic Jout Isentropic
Instead, assume variable specific heat An ideal Diesel cycle has a compression ratio of 17and a cutoff ratio of 1.3. Determine the maximum tempera-ture of the air and the rate of heat addition to this cycle whenit produces 140 kW of power and the state of the air at thebeginning of the compression is 90 kPa and 578C. Use con-stant specific heats at room temperature
2) The compression ratio of an ideal Otto cycle is 7 and prior to compression air is at 285K and 90kPa. The maximum pressure of the cycle is 4100kPa. Assuming that the specific heats are constant where k = 1.4 and cp = 1.005 kJ/kgK. Calculate a) the maximum temperature, ԴՈՒ --- ..z a uvau pian -paving- AT
An ideal air-standard Diesel cycle engine has a compression ratio of 18 and a cutoff ratio of 2. At the beginning of the compression process, the working fluid is at 100 kPa, 27°C (300 K). Determine the thermal efficiency.
1. An air-standard Diesel cycle has a compression ratio of IX and a cutoff ratio of 1,4. At the beginning of the compression process, air is at 97 kPa and 17°C. Accounting for the variation of specific heats with temperature, determine, a. the temperature after the heat-addition process, b. the thermal efficiency, and MEP c. the entropy generation of the engine (40 Point)
An SI engine operates on an Otto cycle at 3800 RPM, with maximum cycle temperature andpressure of 3100 K and 7846 kPa. The engine has a compression ratio of 9.8:1, and immediately after combustion there is 0.000622 kg of exhaust gas in eachcylinder.During exhaustblowdown, the average mass flow rate through the single exhaust valve is 0.218 kg/sec. Atthe end of blowdown, cylinder pressure is reduced to exhaust pressure of 101 kPa.Calculate:(a) Temperature in cylinder at end of exhaust blowdown. [K](b) Mass of exhaust gas in cylinder at end of blowdown. [kg](c) Crank angle when exhaust valve opens. [° bBDC]
Problem 3: An Otto cycle engine installed in a truck has a volume compression ratio of 8 and provides a gas mileage of 12 mpg at the vehicle's normal travelling speed of 40 mph. For purposes of this problem, the cycle can be assumed to be an ideal Otto cycle using air with fixed values of specific heats. The specific heat values are; C₂ = 1004.0J/kg · K, and C₂ = 717 J/kg. K. Assume that the ratio of fuel mileage to cycle efficiency is constant. Evaluate the following, (assume that you have access to fuel that will avoid problems such as auto ignition at the proposed increased compression ratios): a. What gas mileage can be expected if the engine compression ratio is increased to 12? b. What gas mileage can be expected if the engine compression ratio is increased to 16? c. Based on this model, what is the feasibility of trying to achieve 24 mpg solely through an increase in engine compression ratio? Base your answer on the required cycle efficiency.
An ideal Brayton cycle has a pressure ratio of 8. At the beginning of the compression process, air is at 300 K. If Tmax in the cycle is 1200 K, determine the temperature of air, in K, at the beginning of heat exchange processes.determine the back-work ratio,determine the thermal efficiency of the cycle (Apply air-standard assumptions: variable specific heat)

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