A peak-load generator is to be powered by a simple gas turbine with free power turbine delivering 20 MW of shaft power. The following data are applicable: Compressor pressure ratio 11.0
Compressor isentropic efficiency 0.82
Combustion pressure loss 0.4 bar
Combustion efficiency 0.99
Turbine inlet temperature 1150 K
Gas-generator turbine isentropic efficiency 0.87
Power turbine isentropic efficiency 0.89
Mechanical efficiency (each shaft) 0.98
Ambient conditions pa, Ta 1 bar, 288 K

Required:
Calculate the air mass flow required and the SFC.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?