a Consider the steady state mixing process for a building air-conditioning system. Outside air enters a rigid, insulated pipe at an absolute pressure of 1 atm and a temperature of 32C with a velocity of 3 m/s and volumetric flow rate of 0.95 m3/s (State 1) and it is mixed with return air (from occupied spaces) at an absolute pressure of 1 atm and a temperature of 24C with a velocity of 2 m/s flowing through another rigid, insulated pipe of diameter 1.22 m (State 2). The mixed air exits through a rigid, insulated pipe at an absolute pressure of 1 atm with a velocity of 2.6 m/s (State 3). Consider variable properties for air. (a) Calculate the temperature of mixed air, in C. (b) Find the diameter of the exit pipe, in m. Air steadily enters insulated diffuser of an aircraft engine at an absolute pressure of 18 kPa and an absolute temperature of 215 K with a velocity of 265 m/s (State 1) and exits the diffuser at an absolute pressure of 36 kPa and an absolute temperature of 250 K (State 2). Consider variable properties for air. (a) Calculate the velocity of air at the exit, in m/s. (c) Determine the ratio of flow areas (A2/A1) for the diffuser. HW 16(ii) Steam steadily enters a well-insulated turbine with a mass flow rate of 25 kg/s at an absolute pressure of 120 bar and a temperature of 520C (State 1) and exits the turbine with a quality of 92% at an absolute pressure of 0.1 bar (State 2). The power produced by the turbine is used for driving an adiabatic compressor and a generator. Air steadily enters the compressor with a mass flow rate of 10 kg/s at an absolute pressure of 100 kPa and an absolute temperature of 295 K (State 3) and exits at an absolute pressure of 1000 kPa and an absolute temperature of 620 K (State 4). Find the power produced by the generator, in MW