Air at 17 oC is compressed steadily in an adiabatic compressor from 100 kPa to 680 kPa. If the minimum power consumption of this compressor is 7 kW, determine the mass flow rate to run the compressor considering the variation of specific heats with temperature. Note: Do NOT perform interpolation, take the closest value.

Air (MW=29 g/mol) at 115.00 kPa and 285.00  is compressed steadily to 600.0 kPa. The mass flow rate of the air is 2.00 kg/s and a heat loss of 32.1 kW occurs during the process. You may assume that changes in kinetic and potential energy are negligible, the temperature of the surroundings is 25 ∘C, and that the CP of air is 3.5 R. Given the compressor operates with a second law (reversible) efficiency of 0.60,calculate the following. What is the actual work interaction term in kW? What is the actual exit temperature of the air in Celcius?

If you had an uninsulated air compressor which required Win = 400 kW to take air from a state at 80 kPa and 20 °C and change it to a state at 800 kPa and 200 °C, what would the Q be? Assume the air enters via a 10 cm diameter pipe at 20 m/s. (a) -171 kW (b)-198 kW (c) -233 kW (d) -263 kW

4- Consider a water mixer operating at constant pressure, receiving water at the first inlet at I MPa and 30 °C and superheated vapor at the second inlet at I MPa and 300 °C. If the required exit temperature is 120 °C, determine the mass flow ratio of the two inlets.