Estimate the Joule-Thomson coefficient of refrigerant-134a at 320 kPa and 20°C. Assume the second state will...
Estimate the Joule-Thomson coefficient of refrigerant-134a at 320 kPa and 20°C. Assume the second state will be selected for a pressure of 280 kPa. Use data from the tables.
The Joule-Thomson coefficient of refrigerant-134a is _______ K/kPa.
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Estimate the Joule-Thomson coefficient of refrigerant-134a at
320 kPa and 20°C. Assume the second state will...
a. Superheated R-134a is throttled from state 1 at 600 kPa (0.6 MPa) and 120°C to...
a. Superheated R-134a is throttled from state 1 at 600 kPa (0.6 MPa) and 120°C to a pressure of 500 kPa (state 2). Find the temperature at state 2. b. Calculate the Joule-Thompson coefficient of R-134a at 600 kPa (0.6 MPa) and 120°C. c. Does your coefficient from b agree with your results from a?
Refrigerant 134a enters a horizontal pipe operating at steady state at 50°C, 450 kPa and a...
Refrigerant 134a enters a horizontal pipe operating at steady state at 50°C, 450 kPa and a velocity of 56.9 m/s. At the exit, the temperature is 60 °C and the pressure is 220 kPa. The pipe diameter is 0.03 m. Determine the rate of heat transfer between the pipe and its surroundings, in kW
Complete the following table for Refrigerant-134a. Use data from the steam tables. T,°C P, kPa u...
Complete the following table for Refrigerant-134a. Use data from the steam tables. T,°C P, kPa u kJ/kg 20 95 -12 Phase description (Click to select) Saturated liquid (Click to select) (Click to select) 300 400 600 8
3) A vapor-compression refrigerator uses refrigerant-134a. Superheated vapor enters the compressor at 100 kPa and -20°...
3) A vapor-compression refrigerator uses refrigerant-134a. Superheated vapor enters the compressor at 100 kPa and -20° C, and exits at 1 MPa and 60° C. The refrigerant is cooled to 35° C in the condenser and then expands back to 100 kPa through an expansion valve. Neglect pressure losses within the condenser and evaporator. The refrigerant flow rate is 0.10 kg/s. Calculate the following a) the rate of heat removal from the cooled space, in kw, b) the rate of...
Problem 02: 4-27 Complete this table for refrigerant-134a: T,°C P,kPa v,m3/kg Phase description 12 320 30...
Problem 02: 4-27 Complete this table for refrigerant-134a: T,°C P,kPa v,m3/kg Phase description 12 320 30 550 60 600
Thermodynamics: 1.1kg/s of steam at 60 MPa and 800°C is to undergo a Joule-Thomson expansion to...
Thermodynamics: 1.1kg/s of steam at 60 MPa and 800°C is to undergo a Joule-Thomson expansion to 1 MPa. The steam coming out of the Joule-Thomson expansion process is fed to the turbine to produce shaft work. Steam exits the turbine at 0.1 MPa and 155°C. Assume that the turbine is steady-state and adiabatic. a) Does this process violate the second law of thermodynamics? 2. 0.1 m3/s of superheated steam at 1000 kPa and 250oC is travelling through a 10 cm...
5. Refrigerant-134a at 700kPa, 70°C, and 8 kg/min is cooled by air in a condenser until...
5. Refrigerant-134a at 700kPa, 70°C, and 8 kg/min is cooled by air in a condenser until it exits as a saturated liquid at the same pressure. The cooling air enters the condenser at 1MPa and 10°C and leaves at 17°C at the same pressure. Determine: a) Considering only the Refrigerant as a system, the heat transfer rate of a refrigerant from the condenser in (kl/min). R-134a Tables are attached! b) The mass flow rate of the air required for cooling...
QUESTION 3 Refrigerant-134a enters a compressor at 100 kPa and -20°C with flow rate of 1.601...
QUESTION 3 Refrigerant-134a enters a compressor at 100 kPa and -20°C with flow rate of 1.601 m/min and leaves at 800 kPa and 60 °C. Determine the power input of the compressor in kW (Give your answer with three decimals, and do NOT enter units!!!).
A refrigeration unit operates between pressure of 244.83 kPa and 1043.9 kPa, and uses refrigerant-22. The...
A refrigeration unit operates between pressure of 244.83 kPa and 1043.9 kPa, and uses refrigerant-22. The saturated vapour R-22 enters the compressor at -20 °C and leaves the condenser at 25 oC as a saturated liquid. Assume isentropic compression and neglect all losses. Use the property tables and/or figures in the text book. Calculate the coefficient of performance; and
13. Refrigerant-134a enters the condenser of a residential refrigerator at 600 kPa and 40°C at a...
13. Refrigerant-134a enters the condenser of a residential refrigerator at 600 kPa and 40°C at a rate of 0.018 kg/s and leaves at 600 kPa as a saturated liquid. The compressor consumes 1.5 kw of power (a) (1 point) Determine the rate of heat rejection to the room that houses the refrigerator. (Hint: Write the energy equation for the condenser. Answer 3.58 kW) (b) (1 point) Determine the rate of heat absorption from the food compartment. (Answer 2.1 kW) (c)...
a. Superheated R-134a is throttled from state 1 at 600 kPa (0.6 MPa) and 120°C to a pressure of 500 kPa (state 2). Find the temperature at state 2. b. Calculate the Joule-Thompson coefficient of R-134a at 600 kPa (0.6 MPa) and 120°C. c. Does your coefficient from b agree with your results from a?
Complete the following table for Refrigerant-134a. Use data from the steam tables. T,°C P, kPa u kJ/kg 20 95 -12 Phase description (Click to select) Saturated liquid (Click to select) (Click to select) 300 400 600 8
3) A vapor-compression refrigerator uses refrigerant-134a. Superheated vapor enters the compressor at 100 kPa and -20° C, and exits at 1 MPa and 60° C. The refrigerant is cooled to 35° C in the condenser and then expands back to 100 kPa through an expansion valve. Neglect pressure losses within the condenser and evaporator. The refrigerant flow rate is 0.10 kg/s. Calculate the following a) the rate of heat removal from the cooled space, in kw, b) the rate of...
Problem 02: 4-27 Complete this table for refrigerant-134a: T,°C P,kPa v,m3/kg Phase description 12 320 30 550 60 600
5. Refrigerant-134a at 700kPa, 70°C, and 8 kg/min is cooled by air in a condenser until it exits as a saturated liquid at the same pressure. The cooling air enters the condenser at 1MPa and 10°C and leaves at 17°C at the same pressure. Determine: a) Considering only the Refrigerant as a system, the heat transfer rate of a refrigerant from the condenser in (kl/min). R-134a Tables are attached! b) The mass flow rate of the air required for cooling...
QUESTION 3 Refrigerant-134a enters a compressor at 100 kPa and -20°C with flow rate of 1.601 m/min and leaves at 800 kPa and 60 °C. Determine the power input of the compressor in kW (Give your answer with three decimals, and do NOT enter units!!!).
A refrigeration unit operates between pressure of 244.83 kPa and 1043.9 kPa, and uses refrigerant-22. The saturated vapour R-22 enters the compressor at -20 °C and leaves the condenser at 25 oC as a saturated liquid. Assume isentropic compression and neglect all losses. Use the property tables and/or figures in the text book. Calculate the coefficient of performance; and
13. Refrigerant-134a enters the condenser of a residential refrigerator at 600 kPa and 40°C at a rate of 0.018 kg/s and leaves at 600 kPa as a saturated liquid. The compressor consumes 1.5 kw of power (a) (1 point) Determine the rate of heat rejection to the room that houses the refrigerator. (Hint: Write the energy equation for the condenser. Answer 3.58 kW) (b) (1 point) Determine the rate of heat absorption from the food compartment. (Answer 2.1 kW) (c)...
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