R-134a enters an adiabatic compressor as a saturated vapor at -2 C and exits at 0.9...
R-134a enters an adiabatic compressor as a saturated vapor at -2 C and exits at 0.9 MPa. If the compressor is reversible, what would the exit temperature be?
If the compressor was irreversible, the exit temperature would be
a. Higher than for reversible
b. Lower than for reversible
c. The same as for reversible
Thrmodynamics
Homework Answers
If the compressor was irreversible then the exit temperature would be lower than for reversible because in irreversible process ∆S>=0 , hence some extra energy is released which leads to lower exit temperature
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R-134a enters an adiabatic compressor as a saturated vapor at -2
C and exits at 0.9...
R-134a enters an adiabatic compressor as a saturated vapor at -2 C and exits at 0.9...
R-134a enters an adiabatic compressor as a saturated vapor at -2 C and exits at 0.9 MPa. If the compressor is reversible, what would the exit temperature be? Thermodynamics
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of...
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1 MPa pressure. If the isentropic efficiency of the compressor is 87%, determine (a) the temperature of the refrigerant at the exit of the compressor, (b) the power input (in kW), and (c) the rate of entropy generation during this process.
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor...
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor at 100kPa at a rate of 0.7 m/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87%. R-134a Compressor Isentropic Compressor Work hs-h 100 kPa sat. vapor Actual Compressor Work Determine the refrigerant properties at the inlet and outlet for an isentropic process. Actual 2s entropic procEss Inlet state Determine the actual isentropic enthalpy from the efficiency. (Ans: 289.71 J/kg)...
Refrigerant-134a is compressed by an adiabatic compressor from the saturated vapor state at 0.12 MPa to...
Refrigerant-134a is compressed by an adiabatic compressor from the saturated vapor state at 0.12 MPa to 1.2 MPa and 70 C at a rate of 0.108 kg/s. The power input to the compressor is 6.85 kW 59.4 kW 6.42 kW 63.4 kW 587 kW
Problem 4.041 SI Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor...
Problem 4.041 SI Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°C with a volumetric flow rate of 0.18 m3/s. Refrigerant exits at 9 bar, 70°C. 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.
6-17 Refrigerant-134a enters the compressor of a refrig- cration system as saturated vapor at 0.14 MPa...
6-17 Refrigerant-134a enters the compressor of a refrig- cration system as saturated vapor at 0.14 MPa and leaves as superheated vapor at 0.8 MPa and 60°C at a rate of 0.06 kg/s. Determine the rates of energy transfers by mass into and out of the compressor. Assume the kinetic and potential cncrgics to be negligible.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to...
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 1.3 m3/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87 percent. 1 MPa R-134a Compressor 100 kPa sat. vapor Determine the temperature of the refrigerant at the exit of the compressor. Use the tables for R-134a. (You must provide an...
2. Saturated vapor of refrigerant 134a enters a well-insulated compressor at 140 kPa and leaves at...
2. Saturated vapor of refrigerant 134a enters a well-insulated compressor at 140 kPa and leaves at 800 kPa and 50°C at a flowrate of 0.04 kg/s. Estimate the work done by the compressor.
(33%) An insulated compressor is used in an air conditioner that uses R-134a as the working fluid...
(33%) An insulated compressor is used in an air conditioner that uses R-134a as the working fluid. The R-134a enters °C. The mass flow rate of the R-134a through the compressor is 0.1 kg/s. Determine the following: the compressor as a saturated vapor at 4 °C and exits at 10 bar, 70 1-a) The compressor inlet pressure in bar 1-b) The compressor work per unit mass in kJ/kg. 1-c) The compressor power requirement in kW.
(33%) An insulated compressor is...
Required Information NOTE: This is a multi-part question. Once an answer is submitted, you will be...
Required Information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to retum to this part. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.9 m/min and exits at 1MPa pressure. The Isentropic efficiency of the compressor is 87 percent. 1 MPа R-134a Compressor 100 kPa sal vapor Determine the temperature of the refrigerant at the exit of the compressor. Use the tables for R-134a. (You must...
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1 MPa pressure. If the isentropic efficiency of the compressor is 87%, determine (a) the temperature of the refrigerant at the exit of the compressor, (b) the power input (in kW), and (c) the rate of entropy generation during this process.
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor at 100kPa at a rate of 0.7 m/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87%. R-134a Compressor Isentropic Compressor Work hs-h 100 kPa sat. vapor Actual Compressor Work Determine the refrigerant properties at the inlet and outlet for an isentropic process. Actual 2s entropic procEss Inlet state Determine the actual isentropic enthalpy from the efficiency. (Ans: 289.71 J/kg)...
Refrigerant-134a is compressed by an adiabatic compressor from the saturated vapor state at 0.12 MPa to 1.2 MPa and 70 C at a rate of 0.108 kg/s. The power input to the compressor is 6.85 kW 59.4 kW 6.42 kW 63.4 kW 587 kW
Problem 4.041 SI Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°C with a volumetric flow rate of 0.18 m3/s. Refrigerant exits at 9 bar, 70°C. 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.
6-17 Refrigerant-134a enters the compressor of a refrig- cration system as saturated vapor at 0.14 MPa and leaves as superheated vapor at 0.8 MPa and 60°C at a rate of 0.06 kg/s. Determine the rates of energy transfers by mass into and out of the compressor. Assume the kinetic and potential cncrgics to be negligible.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 1.3 m3/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87 percent. 1 MPa R-134a Compressor 100 kPa sat. vapor Determine the temperature of the refrigerant at the exit of the compressor. Use the tables for R-134a. (You must provide an...
2. Saturated vapor of refrigerant 134a enters a well-insulated compressor at 140 kPa and leaves at 800 kPa and 50°C at a flowrate of 0.04 kg/s. Estimate the work done by the compressor.
(33%) An insulated compressor is used in an air conditioner that uses R-134a as the working fluid. The R-134a enters °C. The mass flow rate of the R-134a through the compressor is 0.1 kg/s. Determine the following: the compressor as a saturated vapor at 4 °C and exits at 10 bar, 70 1-a) The compressor inlet pressure in bar 1-b) The compressor work per unit mass in kJ/kg. 1-c) The compressor power requirement in kW.
(33%) An insulated compressor is...
Required Information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to retum to this part. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.9 m/min and exits at 1MPa pressure. The Isentropic efficiency of the compressor is 87 percent. 1 MPа R-134a Compressor 100 kPa sal vapor Determine the temperature of the refrigerant at the exit of the compressor. Use the tables for R-134a. (You must...
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