To review the efficiency of ideal heat engines operating on the Otto and Diesel cycles, you are asked to perform the following branches: • Provide general plot(s) for thermal efficiency, 7 vs compression ratio, r for ideal Otto and diesel engines and show the typical compressions ratios. Compare your plots in terms of the typical compression ratio values. • Using your plot of the thermal efficiency, 7 vs compression ratio, r for ideal diesel engine, show how will the thermal efficiency of the diesel engine, n would change with the cut-off ratio values. • Explain mathematically how the thermal efficiency, n of Otto cycle is always higher than diesel cycle if-and-only-if both engines are operated at the same compression ratio, r.

I need help on this assignment: Exhaust gases from the turbine of a simple Brayton cycle are quite hot and may be used for other thermal purposes. One proposed use is generating saturated steam at 110℃ from water at 30℃ in a boiler. This steam will be distributed to several buildings on a university campus for space heating. A Brayton cycle with a pressure ration of 6 is to be used for this purpose. Plot the following:(a) The mechanical power produced,(b) the flow rate of the produced steam,(c) the maximum cycle temperature, all as functions of the rate at which heat is added to the cycle.

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An air-standard Otto cycle has a compression ratio of 9. At the beginning of compression, P1 = 100 kPa and T1 = 300 K. The heat addition per unit mass of air is 1350 kJ/kg. Determine: a) the net work, in kJ per kg of air b) the thermal efficiency of the cycle c) the mean effective pressure, in kPa