The Brayton cycle shown in Figure P16.61 is the idealized cycle for a gas turbine or jet...

The Brayton cycle shown in Figure P16.61 is the idealized cycle for a gas turbine or jet engine. Consider an engine using the Brayton cycle that operates on 0.070 mol of ideal gas between the pressures and Note: Retain three significant figures in all calculations. (a) Determine the work done for the displacements (b) Determine the temperature of the ideal gas at each point. (c) Calculate the work done for the adiabatic expansion and contraction Hint: Consider the change in internal energy. (d) What is the total work done by one cycle? (e) Determine the amount of heat fl owing in, during the isobaric expansion and the heat flowing out of the gas during the isobaric contraction, Hint: The specific heat per mole for an ideal gas under constant pressure is given by (f) Determine the efficiency for this Brayton engine (Eq. 16.18). Note: The heat loss and friction in a real Brayton engine will reduce this ideal efficiency. (e) Calculate and compare to the efficiency of a Carnot engine running between the same high and low temperatures.

(reference figure P16.60)

(reference equation 16.18)