A piston-cylinder arrangement operates on an air-standard cycle composed of the following four processes:
(1-2) An isentropic-compression process that takes air from 14.7 psia and 50°F to a pressure of 300 psia
(2 -3) A constant-pressure combustion process that occurs at 300 psia and increases the temperature to 3000°F
(3-4) An isentropic process that reduces the pressure to 100 psia
(4-1) A constant-volume process that further reduces the pressure to 14.7 psia to complete the cycle
Sketch the cycle on P-v and T-s diagrams. Using the ideal-gas relationships developed in Chapter 3 assuming constant specific heats, calculate the net work output and heat input for this cycle. What is its efficiency?