If one mole of air/fuel mixture (rigid diatomic gas) is initially at 20 °C, is compressed andexpanded 7-fold as part of the Otto cycle, and 4 kJ of heat is generated by burning theair/fuel mixture, calculate: (i) the temperature after each stage of the Otto cycle; (ii) theheat absorbed/expelled during each stage of the cycle; and (iii) the efficiency of the Ottocycle.

The initial temperature is T1=20°C=293 K The number of moles is n=1 The heat generated is Q=4 kJ The…

Answered: If one mole of air/fuel mixture (rigid…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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If one mole of air/fuel mixture (rigid diatomic gas) is initially at 20◦C, is compressed and expanded 7-fold as part of the Otto cycle, and 4 kJ of heat is generated by burning the air/fuel mixture, calculate: (i) the temperature after each stage of the Otto cycle; (ii) the heat absorbed/expelled during each stage of the cycle; and (iii) the efficiency of the Otto cycle.
QL The volume at the beginning of the isentropic compression in a dual combustion cycle is 17 times the volume at the end of the isentropic compression. Calculate the mean effective pressure and the thermal efficiency when the minimum and maximum pressures are 1 bar and 690bar and the minimum and ‘maximum temperatures 20°C and 1900°C. (Sketch the processes on P-V and T-S diagrams)
Liquid octane is burned steadily with air in a jet engine. If the air–fuel ratio is 18 kg air/kg fuel, determine the percentage of excess air used during this process.
In an ideal reduction method, havaotto 100 kPa, and 27 °C 1000 kJ/kg heat is applied to the combustion flow. Given the temperature of the specific heats, when the net power increases at the compression ratio, which approaches 7? (c: 1.0035 kJ/kgK; cy: 0.7165 kJ/kgK; R: 0.287 kJ/kgK; k: 1.4)
Calculate the consumption of fuel oil required in an industrial steam plant to generate5,000 kW at the turbine shaft. The calorific value of the fuel is 40,000 kJ/kg and the efficiencyof the Rankine cycle is 50%. Assume appropriate values for the isentropic efficiency of the turbine, for heat transfer from the boiler and for combustion efficiency. Please explain each step and make your own resolution
Define the Exergy Destroyed During Stirring of a Gas.
Define specific heats. Differentiate between specific heats at constant pressure and constant volume. Give their examples. Write the values of cp, cv, R, and γ for air and combustion products.
H1. A stack gas containing 71.9% N2, 10% CO2 and 18.1% CO is passed through a turbine. This gas stream flows at 500 m3 STP/min and cools from 1000°C to 500°C. a. How much shaft work is done if the rate of heat removal from the turbine is 2000 kW? b. What was the flow rate of air (m3/s) to the combustor if the air was fed at 50°C and 6 atm? c. What is the theoretical amount (mol/s) of air required for the combustor? d. Generally excess air is used. Why?
Forty kilograms of methane gas per minute is burned with dry air in heating furnace. The volumetric analysis of the products on a dry basis is 5.20% carbon dioxide, 0.33% carbon monoxide, 11.24% oxygen, and 83.23% nitrogen. Calculate the minimum duct diameter, in mm, used to supply the combustion air at 1 bar and 27 deg C and at a flow velocity of 15 m/s.
In an isochoric and isobaric combustion cycle, the indicated mean pressure is 10 bars and the maximum pressure is 60 bars. The pressure and temperature at the start of the cycle are 1 bar and 17 oC. The volumetric compression ratio is 16/1. The mass constant of gas, R = 287 J / kg K The specific heat at constant volume, cv = 718 J / kg K. Calculate the maximum temperature of the combustion cycle for a thermal efficiency of 60%.
In an isochoric and isobaric combustion cycle, the indicated average pressure is 10 bars and the maximum pressure is 60 bars. The pressure and temperature at the start of the cycle are 1 bar and 17 oC. The volumetric compression ratio is 16/1. The mass constant of gas, R = 287 J / kg K The specific heat at constant volume, cv = 718 J / kg K. Calculate the maximum temperature of the combustion cycle for a thermal efficiency of 60%.
what are the results and discussion in Explaining the operation and importance of the valve system in the internal combustion engines?

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