Steam enters a turbine operating at steady state at p1 = 6 MPa, T1 = 600oC with a mass flow rate of 305 kg/min and exits as saturated vapor at p2 = 20 kPa, producing power of 4.88 MW. Kinetic and potential energy effects can be ignored. Heat transfer occurs from the turbine to its surroundings which are at T0 = 30oC. Determine the magnitude of the rate of heat transfer, in kW, and the rate of entropy production, in kW/K, within an enlarged control volume that includes the turbine and enough of its surroundings for the heat transfer to occur at T0 = 30oC.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k