Question

In: Mechanical Engineering

Methane (CH4) enters a compressor operating at steady state with a mass flow rate of 170...

Methane (CH4) enters a compressor operating at steady state with a mass flow rate of 170 lbm/hr. The methane enters the compressor at p1 = 15 lbf/in2 , T1 = 80F and exits at p2 = 100 lbf/in2 . The work input to the compressor is 15 hp. Assume ideal gas behavior for the methane with constant specific heats (cp = 0.538 Btu/lbm·R, cv = 0.414 Btu/lbm·R). Kinetic and potential energy effects are negligible and the compressor is insulated

1)Determine the temperature at the exit of the compressor, in F.

2) Determine the rate of entropy production, Btu/hr·R, in the compressor

Solutions

Expert Solution


Related Solutions

Saturated water vapor at 300F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300F enters a compressor operating at steady state with a mass flow rate of 5 lb/s and is compressed adiabatically to 750 psi. Determine: a) The percent isentropic compressor efficiency. b) The rate of entropy production, in hp/R.
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow rate of 5 lb/s and is compressed adiabatically to 750 lbf/in.2 If the power input is 2150 hp, determine for the compressor: (a) the percent isentropic compressor efficiency and (b) the rate of entropy production, in hp/°R. Ignore kinetic and potential energy effects.
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow rate of 5 lb/s and is compressed adiabatically to 650 lbf/in.2 If the power input is 2150 hp, determine for the compressor: (a) the percent isentropic compressor efficiency and (b) the rate of entropy production, in hp/°R. Ignore kinetic and potential energy effects.
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow...
Saturated water vapor at 300°F enters a compressor operating at steady state with a mass flow rate of 5 lb/s and is compressed adiabatically to 650 lbf/in.2 If the power input is 2150 hp, determine for the compressor: (a) the percent isentropic compressor efficiency and (b) the rate of entropy production, in hp/°R. Ignore kinetic and potential energy effects.
Question Methane gas (CH4) enters a home heating furnace operating at steady state and burns completely...
Question Methane gas (CH4) enters a home heating furnace operating at steady state and burns completely with 110% of theoretical dry air, each stream entering at 77 F, 1 atm. Combustion products are discharged to the flue at 300 F, 1 atm. Return air from the house enters at 60 F, 1 atm, with a volumetric flow rate of 1000 ft3 /min and is supplied to heat the house at 120 F, 1 atm. Kinetic and potential energy effects can...
An air compressor is operating at a steady state. The air enters at with a volumetric...
An air compressor is operating at a steady state. The air enters at with a volumetric flow rate 1.2 m^3/s at 170 kPa and 22 degrees celsius with negligible velocity and leaves at 1500 kPa with velocity of 200 m/s. The power to the compressor is 60 kW and the compressor is cooled at a rate of 15 kJ/kg. Determine the exit area.
methane gas CH4 enters a steady flow combustion chamber at 25 oC and 1 atm and...
methane gas CH4 enters a steady flow combustion chamber at 25 oC and 1 atm and is burned with 40 percent excess air, which also enters at 25 oC and 1 atm. After combustion, the products are allowed to cool to 25 oC. Assume complete combustion, determine the heat transfer per kmol of CH4
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric...
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 48 m3/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 8 kW from the compressor to its surroundings. Assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the power input, in kW.
Air enters a compressor operating at steady state with a pressure of 14.7 lbf/in.2, a temperature...
Air enters a compressor operating at steady state with a pressure of 14.7 lbf/in.2, a temperature of 70°F, and a volumetric flow rate of 500 ft3/min. The air velocity in the exit pipe is 700 ft/s and the exit pressure is 133 lbf/in.2 If each unit mass of air passing from inlet to exit undergoes a process described by pv1.34 = constant, determine (a) the exit temperature, in °F, and (b) the diameter of the exit pipe, in inches.
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26oC with...
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26oC with a volumetric flow rate of 0.18 m3/s. Refrigerant exits at 8 bar, 70oC. Changes in kinetic and potential energy from inlet to exit can be ignored. Determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kW.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT