Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 4 MPa, 500C, and 80 m/s, and the exit conditions are 92 percent quality, and 50 m/s. The mass flow rate of the steam is 12 kg/s. Investigate the effect of the turbine exit pressure on the power output of the turbine. Let the exit pressure vary from 10 to 200 kPa (10 different pressure namely 10, 30, 40, 50, 75, 100, 125, 150, 175, 200 kpa is enough). Prepare a table and two plot as follows:
• Tabulate turbine exit pressure, the power output of the turbine and turbine exit temperature (the table template is below)
• Plot the power output against the exit pressure,
• Plot the exit temperature against the exit pressure,
• and discuss the results

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.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false