(d) Why would it be desirable to operate automobile engines on a two-stroke cycle?

We wish to model a gasoline engine for an automotive application with the ideal Otto cycle. The compression ratio is 10. The heat added is 2965 kJ/kg.  For a 4 stroke engine, what is the engine displacement in liters to produce 500 hp at a rotational speed of 5000 rpm.    The inlet pressure is 100 kPa and the inlet temperature is 27 deg C Group of answer choices 4.3 L 5.0 L 5.7 L 2.2 L

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Example 5.1: In an air standard Otto cycle, the pressure, and temperature at the start of the com- pression stroke are 0.1 MPa and 300 K, respectively. The temperature at the end of the compres- sion and at the end of the heat addition processes are 600 and 1,600 K, respectively. Calculate (i) thermal efficiency, (ii) heat added, (i) net work per kg of air, and (iv) mean effective pressure.

5. (a) If the compression ratio of an engine working on Otto cycle isIncreased from 5 to 7, find the percentage increase in thermalefficiency. (b) Derive an expression for thermal efficiency of ideal Brayton cycle.(c) In an engine working on the ideal Otto cycle, the pressure and temperature at the beginning of compression are 100 kPa and 40 °C respectively. The ratio of specific heat capacities is 1.4. If the airstandard efficiency of the engine is 50%, determine(i) The compression ratio. (ii) The pressure and temperature at the end of adiabaticcompression.   (6a) Explain and discuss in your own words, the following three concepts incombustion: stoichiometric mixture of air and fuel, weak mixture and richmixture. Explain their importance in combustion applications.(6b) A gas fuel has the following volumetric composition:Propane C3H8: 73 %Butane C4H10: 5 %Ethane, C2H6: 3%Nitrogen N2: 19%(i) Write out the complete combustion equations for all the combustible constituents individually.…

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Could subsection Vii and onwards be solved please?

Problem 1 (10 pts) (a) A heat engine operates between a reservoir at 350°C, from which it absorbs 200 kJ of heat per cycle, and a reservoir at 0°C, to which it rejects 115 kJ of heat per cycle. Determine if this engine represents a reversible, irreversible, or impossible cycle? (4 pts)

Example-2 A Regenerative Gas-Turbine cycle operates under pressure ratio of 9. The compressor inlet conditions are 18°C and 1 bar and its efficiency is 85%. The thermal ration of the heat exchanger is 80%. Heat is added to the compressed air after leaving the heat exchanger till its temperature became 900°C. The air then expands adiabatically in a 75% efficient turbine. If the air mass flow rate not exceeds 10 kg/s, determine the rate of heat added, the turbine work, the back work ratio, and the cycle thermal efficiency.

a) An engineer proposed a design of cyclical engine that operates at the energy source whose temperature is 550 K and a sink at 300 K that generates waste heat. In the design proposal, it has been claimed that the cyclical engine can produces 5 kW while rejecting heat at a rate of 15000 kJ/h. Evaluate if the design proposal is valid. Justify your answer with related calculation.