Problem
1. Air enters an insulated turbine at 50oC and exits the turbine at -30oC, 100 kPa. The isentropic turbine efficiency is 70% and the inlet volumetric flow rate is 20 L/s. What is the turbine inlet pressure and the turbine power output?
2. A stream of ammonia enters a steady-flow device at 100 kPa, 50?C at the rate of 1 kg/s. Two streams exit the device at equal mass flow rates; one is at 200 kPa, 50oC, and the other is as saturated liquid at 10oC. It is claimed that the device operates in a room at 25oC on an electrical power input of 250 kW. Is this possible?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.