a 10 ft^3 tank is full of liquid refrigerant R-134a at a temperature of 120 F....
a 10 ft^3 tank is full of liquid refrigerant R-134a at a temperature of 120 F. A valve is opened an allows vapor to be removed from this tank and sent to a reversible and adiabatic turbine to produce work. The temperature in the tank remains constant during the process. the refrigerant leaves the turbine at a pressure of 10 psia. Calculate the amount of work (in Btu) produced by the turbine if half of the mass in the tank is used.
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a 10 ft^3 tank is full of liquid refrigerant R-134a at a
temperature of 120 F....
(4 points) A-C line Liquid R-134a A rigid container containing 6.8 kg of saturated liquid R-134a...
(4 points) A-C line Liquid R-134a A rigid container containing 6.8 kg of saturated liquid R-134a at 26°C is used to fill an air- conditioning system. A valve is opened and allows liquid R-134a to escape the tank into the A-C line until only 0.85 kg of R-134a remains in the tank, at which point the valve is closed. During the process, heat transfer is allowed to occur to maintain the tank temperature at 26 °C. What is the quality...
Refrigerant 134a enters a turbine with a mass flow rate of 12 kg/s at 54°C, 3...
Refrigerant 134a enters a turbine with a mass flow rate of 12 kg/s at 54°C, 3 MPa, while the velocity is negligible. The refrigerant expands in the turbine to a saturated vapor at 400 kPa where 10 percent of the steam is removed for some other use. The remainder of the refrigerant continues to expand to the turbine exit where the pressure is 5 kPa and quality is 75 percent. If the turbine is adiabatic, determine the rate of work...
A 1-mº rigid tank contains 100 kg R-134a at a temperature of 16 °C. A valve...
A 1-mº rigid tank contains 100 kg R-134a at a temperature of 16 °C. A valve on top of the tank is opened, and saturated vapor is allowed to escape through a throttle to a collector system at 100 kPa. During the process the temperature inside the tank remains at 16 °C by heat transfer from the 20 °C surroundings. The valve is closed when no more liquid remains inside the tank. Calculate the heat transfer to the tank and...
A Refrigeration System Using R-134A In a refrigeration system, the refrigerant R-134A begins as s...
A Refrigeration System Using R-134A In a refrigeration system, the refrigerant R-134A begins as saturated vapor at -15°(State 1). It then goes through a reversible adiabatic compressor to reach State 2. After flowing through the condenser (a heat exchanger), the refrigerant exits as saturated liquid at 70°C (State 3). It is then throttled by going through an expansion valve, to reach State 4. It finishes the cycle by going through another heat exchanger (the evaporator), to return to State 1....
Problem I: Not applicable for 2017 Problem II: In an R-134a vapor-compression home heat pump, R-134A...
Problem I: Not applicable for 2017 Problem II: In an R-134a vapor-compression home heat pump, R-134A enters the compressor (75% isentropic efficiency) as a saturated vapor at 200 kPa and leaves at 800 kPa. The refrigerant goes through a constant pressure condenser and leaves as a saturated liquid. The refrigerant then goes through an adiabatic expansion valve enters the evaporator as a liquid-vapor mixture. The mass flow rate of refrigerant is 0.1 kg/s. and Cod A. Write the equation for...
.0.5 kg/s of refrigerant R-134a undergoes a series of steady-state operations as indicated in the figure below: 12:...
.0.5 kg/s of refrigerant R-134a undergoes a series of steady-state operations as indicated in the figure below: 12: Isobaric heating process. 23: Reversible and adiabatic compression process 34: Isobaric cooling. 45: Expansion process using throttling va Ive. 1) Determine the amount of heat needed during the evaporation process (12) 2) Determine the ch ange of entropy during the compression process and the temperature of the refrigerant at state 3. 3) Calculate the power input for the compression process. 4) Determine...
A vapor compression refrigeration cycle utilizes R-134a as the working fluid. The refrigerant flow rate is 50 g/s. Vapor at 150 kPa and -10 0C enters the compressor and leaves at 1.2 MPa and 75 0C. Th...
A vapor compression refrigeration cycle utilizes R-134a as the working fluid. The refrigerant flow rate is 50 g/s. Vapor at 150 kPa and -10 0C enters the compressor and leaves at 1.2 MPa and 75 0C. The power input to the non-adiabatic compressor is measured and found to be 2.4 kW. The refrigerant enters the expansion valve at 1.15 MPa and 40 0C and leaves the evaporator at 160 kPa and -15 0C. Determine the entropy generation in the compression...
thermodynamics Page 5 of 12 Problem 3 (SS pts): The following figure provides the schematic o using Refrigerant 134a as the working fluid to keep a ro the outdoor air at 34 "C. The refrigeran...
thermodynamics
Page 5 of 12 Problem 3 (SS pts): The following figure provides the schematic o using Refrigerant 134a as the working fluid to keep a ro the outdoor air at 34 "C. The refrigerant enters the co leaves dhe rate of O.06 m steady site compressor at 320 kPa as a satwrated vapor w a saturated liquid. Assume there is no pressure drop in the eo stray heat transfer for the compressor the valve, leaves at 1 refrigerant leaves...
QUESTION 21 Q21 (LO3) (2 Marks] A tank whose volume is unknown is divided into two parts by a parttion. One side of the tank contains 0.05 m3 of refrigerant-134a that is a saturated liqui at 0.9...
QUESTION 21 Q21 (LO3) (2 Marks] A tank whose volume is unknown is divided into two parts by a parttion. One side of the tank contains 0.05 m3 of refrigerant-134a that is a saturated liqui at 0.9 MPa, while the other side is evacuated. The partion is now removed, and the refrigerant i determine the volume of the tank fils the entire tank. If the final state of the refrigerant is 20°C and 280 kPa, R-134a Evacuated P 0.9 MPa...
Saturated vapor R 134a is contained in a piston/cylinder at room temperature 20℃ at which pont...
Saturated vapor R 134a is contained in a piston/cylinder at room temperature 20℃ at which pont the c inder vol me is 10 L The piston L. The cylinder is uninsulated. In addition, the external force is reduced very slowly as the process takes place (temperature remains constant isothermal process). If the work done during the process is 8.0 kJ, and the final internal energy is 395.8 kJlkg, determine how much heat is transferred? is now to expand to 40...
(4 points) A-C line Liquid R-134a A rigid container containing 6.8 kg of saturated liquid R-134a at 26°C is used to fill an air- conditioning system. A valve is opened and allows liquid R-134a to escape the tank into the A-C line until only 0.85 kg of R-134a remains in the tank, at which point the valve is closed. During the process, heat transfer is allowed to occur to maintain the tank temperature at 26 °C. What is the quality...
Refrigerant 134a enters a turbine with a mass flow rate of 12 kg/s at 54°C, 3 MPa, while the velocity is negligible. The refrigerant expands in the turbine to a saturated vapor at 400 kPa where 10 percent of the steam is removed for some other use. The remainder of the refrigerant continues to expand to the turbine exit where the pressure is 5 kPa and quality is 75 percent. If the turbine is adiabatic, determine the rate of work...
A 1-mº rigid tank contains 100 kg R-134a at a temperature of 16 °C. A valve on top of the tank is opened, and saturated vapor is allowed to escape through a throttle to a collector system at 100 kPa. During the process the temperature inside the tank remains at 16 °C by heat transfer from the 20 °C surroundings. The valve is closed when no more liquid remains inside the tank. Calculate the heat transfer to the tank and...
A Refrigeration System Using R-134A In a refrigeration system, the refrigerant R-134A begins as saturated vapor at -15°(State 1). It then goes through a reversible adiabatic compressor to reach State 2. After flowing through the condenser (a heat exchanger), the refrigerant exits as saturated liquid at 70°C (State 3). It is then throttled by going through an expansion valve, to reach State 4. It finishes the cycle by going through another heat exchanger (the evaporator), to return to State 1....
Problem I: Not applicable for 2017 Problem II: In an R-134a vapor-compression home heat pump, R-134A enters the compressor (75% isentropic efficiency) as a saturated vapor at 200 kPa and leaves at 800 kPa. The refrigerant goes through a constant pressure condenser and leaves as a saturated liquid. The refrigerant then goes through an adiabatic expansion valve enters the evaporator as a liquid-vapor mixture. The mass flow rate of refrigerant is 0.1 kg/s. and Cod A. Write the equation for...
.0.5 kg/s of refrigerant R-134a undergoes a series of steady-state operations as indicated in the figure below: 12: Isobaric heating process. 23: Reversible and adiabatic compression process 34: Isobaric cooling. 45: Expansion process using throttling va Ive. 1) Determine the amount of heat needed during the evaporation process (12) 2) Determine the ch ange of entropy during the compression process and the temperature of the refrigerant at state 3. 3) Calculate the power input for the compression process. 4) Determine...
thermodynamics
Page 5 of 12 Problem 3 (SS pts): The following figure provides the schematic o using Refrigerant 134a as the working fluid to keep a ro the outdoor air at 34 "C. The refrigerant enters the co leaves dhe rate of O.06 m steady site compressor at 320 kPa as a satwrated vapor w a saturated liquid. Assume there is no pressure drop in the eo stray heat transfer for the compressor the valve, leaves at 1 refrigerant leaves...
QUESTION 21 Q21 (LO3) (2 Marks] A tank whose volume is unknown is divided into two parts by a parttion. One side of the tank contains 0.05 m3 of refrigerant-134a that is a saturated liqui at 0.9 MPa, while the other side is evacuated. The partion is now removed, and the refrigerant i determine the volume of the tank fils the entire tank. If the final state of the refrigerant is 20°C and 280 kPa, R-134a Evacuated P 0.9 MPa...
Saturated vapor R 134a is contained in a piston/cylinder at room temperature 20℃ at which pont the c inder vol me is 10 L The piston L. The cylinder is uninsulated. In addition, the external force is reduced very slowly as the process takes place (temperature remains constant isothermal process). If the work done during the process is 8.0 kJ, and the final internal energy is 395.8 kJlkg, determine how much heat is transferred? is now to expand to 40...
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