THERMODYNAMICS (With Solution)

4G 4G 10:04 K 93 FME4-M: PROBLEM SET 06 (F.. . . . 9. A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/ft^3 and discharge it with density of 0.304 lb/ft^3 . At the suction P1=15 psia; at discharge, P2=80 psia. The increase in the specific internal energy is 33.8 BTU/lb and the heat transferred from the air by cooling is 13 BTU/lb. Determine the work on the air in BTU/lb. Neglect change in kinetic energy. (10 Points) Enter your math answer 10. Assuming the there are no heat effect and no frictional effects, find the kinetic energy in BTU of a 3220 lb body in fpm after it falls 778 ft from rest. Start with the steady flow equation, deleting terms which are irrelevant. (10 Points) Enter your math answer E4G 4G 10:04 6.00 KB/S 93 FME4-M: PROBLEM SET 06 (F. . . . 7. Steam enters a turbine stage with an enthalpy of 3628 kJ/kg at 70 m/s and leaves the same stage with an enthalpy of 2846 kJ/kg and velocity of 124 m/s. Calculate the work done by the steam in kJ/kg. (10 Points) Enter your math answer 8. Air flows steadily at the rate of 0.5 kg/s through an air compressor, entering at 7 m/s speed, 100 kPa pressure and 0.95 m^3/kg specific volume, leaving at 5 m/s,700 kPa, and 0.19 m^3/kg. The internal energy of the air leaving is 90 kJ/kg greater than that of the air entering. Cooling water in the compressor jackets absorbs heat from the air at the rate of 58 kW. Compute the work in kW. (10 Points) Enter your math answer E