1.Air enters an adiabatic compressor at 100 kPa and 17 degrees C at a rate of 2.4 m^3/s. It exits at 257 Degrees (C). The compressor has an isentropic efficiency of 84%. Neglecting the changes in kinetic and potential energy, determine (a) the exit pressure of air and (b) the power input to drive the compressor.
2.Steam expands in a turbine steadily at a rate of 25,000 kg/hr from 8 MPa and 450 oC to saturated vapor at 50 kPa. If the power generated by the turbine is 4 MW, what is the rate of entropy generation during this process? Assume that the boundary of the turbine where heat is lost from the turbine is at the ambient temperature of 25 oC.
3.Liquid water is to be pumped by a 10-kW pump from 100 kPa at a rate 5 kg/s. What is the highest pressure the water can reach at the exit? Neglect the kinetic and potential energy change of the water. Take the specific volume of water as constant at 0.001 m3/kg.