Abasic open gas turbine cycle uses a pressure ratio of 8. the isentropic efficiency of both the turbine and compressor is 90%. the low pressure in the cycle is 100 kpa. the temperature limits in the cycle are 20°c and 1250°c. take k = 1.4, cp = 1.005 kj/kg k and the mass flow as 25 kg/s. (a) calculate the cycle efficiency and the nett power output. (b) if the fuel calorific value is 41mj/kg estimate the air fuel ratio.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.