A Piston and cylinder device containg 12K9 of water Carries out a correct is is Powercycle, the maximum pressure 2mpa and the minimum Pressure 110kPa, During the isothermal expansion the water is heated 14% until it is a quality of from a Saturated vapour, The de Produces 500 kJ/kg of work, during The Adiabatic expansion. a) sketch the Process Path of the cycle on 9 P-V dragam. 3) Calalate and w in KJ for each process on the cycle c) calculate the thermal efficiency of the cycle.

4) A boiler generates 600 kg of steam per hour. The enthalpy of feed water s 168 kj/kg and the enthalpy of steam is 2772 kj/kg. Neglecting PE KE cal the rate at which the heat is transferred.

3. A water-tube boiler having a heating surface of 325.23 m² evaporates 6349.21 kg of water in an hour from a feed temperature of 66 °C. Boiler pressure is at 1.04 MPaa and the steam quality at the boiler outlet is 99 %. What percent of its rated Bo. Hp was the boiler developing?

TH 3 kg of air as an ideal gas undergoes a Carnot refrigeration cycle as shown The isothermal expansion occurs at 300K and isothermal compression occurs at 600K. The heat transfer to air during isothermal expansion is 125 kJ. Pressure at the end of figure. isothermal expansion is 75 kPa. a. Find pressure at the beginning of the isothermal expansion. Show all work and explain your numbers. b. Sketch this cycle on the T-s diagram. Show on the diagram the system states (1,2,3, and 4), the cycle direction, and the cycle work (not its amount)