In steam power plants, open feedwater heaters are frequently utilized to heat the feedwater by mixing it with steam bled off the turbine at some intermediate stage. consider an open feedwater heater that operates at a pressure of 1000 kpa. feedwater at 50°c and 1000 kpa is to be heated with superheated steam at 200°c and 1000 kpa. in an ideal feedwater heater, the mixture leaves the heater as saturated liquid at the feedwater pressure. determine the ratio of the mass flow rates of the feedwater and the superheated vapor for this case.

On a hot saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 22degreesc. at noon the air conditioner is turned off, and the people go home. the temperature outside is a constant 33degreesc for the rest of the afternoon. if the time constant for the building is 4 hr, what will be the temperature inside the building at 4 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? at 6 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? when will the temperature inside the building reach 24degreesc? 324281