Chapter 8, Problem 8.127EP

(15%) A small expander (a turbine with heat transfer) has 0.05 kg/s helium entering at 1000 kPa, 550 K and leaving at 250 kPa, 300 K. The power output on the shaft measures 55 kW. Find the rate of heat transfer, neglecting kinetic energies.

In a turbine, steam enters with an enthalpy of 1275 Btu/lb, and leaves with an enthalpy of 1115 Btu/lbm. The transferred heat is 13 Btu/ibm. Find the turbine work in hp where the steam flow rate is 5 lbm/sec?

Solve it correctly and fast please.

A mixing chamber with heat transfer receives 2 kg / s of R - 134a at 1 MPa, 50 ° C in one line and 1 kg / s of R - 134a at 15 ° C, quality 40% in a line with a valve. The outgoing Now is at 1 MPa, 70 ° C Find the rate of heat transfer to the mixing chamber

4. Air at a temperature of 500 0C is compressed at a constant pressure of 1.2MPa from a volume of 2 m3 to a volume of 0.4m3 . If the initial internal energy decrease is 4820 KJ, find a. The work done during the reversible compression b. The heat transferred c. The change of enthalpy d. The average specific heat at constant pressure

Step by step Solution with brief explanation. Answer is around 365kPa,But I need Solution. 1) A 3-stages air compressor compresses air from 100 kpa to 700 kpa. Find the intercooler pressure between the 2nd and 3rd stage.

During an isentropic non-flow process with air, the pressure drops from 75psia to 30psia. The airhas mass of 0.25 lbm and the initial temperature was 265°F. Find: a. The final temperature, in °Fb. The heat transferred, in BTUc. The change in internal energy, in BTUd. The work done, in BTU

A cycle HE does 60kJ of work per cycle. If the efficiency of the heat engine is 60%. The heat rejected per cycle is.

A rigid insulated tank is separated into two rooms by a stiff plate. Room A of 0.5 m 3 contains air at 250Kpa, 300 K and room B is 1 m 3 has air at 200 Kpa, 1000 K. the plate is removed and the air comes to auniform state without any heat transferred. find the final temp and pressure of the room.