Ideal gas is gas that follows the PV = mRT equation state. Is refrigerant R-134A an ideal gas?
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Ideal gas is gas that follows the PV = mRT equation state. Is refrigerant R-134A an ideal gas?
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid....
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
An ideal vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid....
An ideal vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at 1.25 bar, and saturated liquid exits the condenser at 5 bar. The mass flow rate of refrigerant is 8.5 kg/min. A. Determine the magnitude of the compressor power input required, in kW (report as a positive number). B. Determine the refrigerating capacity, in tons. C. Determine the coefficient of performance. Please answer all parts of the question. Thanks!
8. 10 Point Bonus! The Ideal Gas Equation of State is pV = nRT, where n=...
8. 10 Point Bonus! The Ideal Gas Equation of State is pV = nRT, where n= number of moles of gas & R is the ideal the gas constant. The Van der Waals Equation of State is briefly discussed in Ch. 5 of the book by Reif. It is an empirical, crude attempt to improve on the Ideal Gas Model by allowing gas molecules to interact with each other. For one mole of non-ideal gas this equation of state is...
2. At 20 °C hydrogen gas follows the following equation of state: PV = RT (1...
2. At 20 °C hydrogen gas follows the following equation of state: PV = RT (1 + 5.14 x 10-3 P + 1.09 x 10-5 p2) in this equation V is the molar volume. Determine the fugacity and fugacity coefficient of hydrogen gas at 20 °C and 1 atm.
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....
The state of an ideal gas can be represented by a point on a PV (pressure-volume)...
The state of an ideal gas can be represented by a point on a PV
(pressure-volume) diagram. If you know the quantity of gas, n, a
unique point in pressure (P) and volume (V) can be used to
determine a temperature (T). Each point on a PV diagram also has a
single internal energy (U) assigned to it. If a process starts at a
point and returns to that same point on a PV diagram, it returns to
the same...
The state of an ideal gas can be represented by a point on a PV(pressure-volume)...
The state of an ideal gas can be represented by a point on a PV (pressure-volume) diagram. If you know the quantity of gas, n, a unique point in pressure (P) and volume (V) can be used to determine a temperature (T). Each point on a PV diagram also has a single internal energy (U) assigned to it. If a process starts at a point and returns to that same point on a PV diagram, it returns to the same...
An ideal vapor-compression refrigeration cycle that uses refrigerant R-134a as its working fluid maintains a condenser...
An ideal vapor-compression refrigeration cycle that uses refrigerant R-134a as its working fluid maintains a condenser at 800 kPa and the evaporator at -12C. (a) Determine this system's COP and the amount of power required to service a 150kW cooling load. (b) Determine the P,T, h, S and exergy of R-134a at all four states of the entire cycle. Assume the ambient temperature to be 25C.
A vapor-compression heat pump system uses Refrigerant R-134a as the working fluid. The refrigerant enters the...
A vapor-compression heat pump system uses Refrigerant R-134a as the working fluid. The refrigerant enters the compressor at 2.0bar, -5degC and with a mass-flow rate of 26g/s. Compression is adiabatic to 11.6bar, 60degC and the refrigerant exits the condenser 8degC sub-cooled. a) Draw a P-h chart to visualise the refrigeration cycle and display known data. b) Determine the power input to the compressor in kW c) Determine the heating capacity of the system in kW d) Determine the coefficient of...
.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...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
8. 10 Point Bonus! The Ideal Gas Equation of State is pV = nRT, where n= number of moles of gas & R is the ideal the gas constant. The Van der Waals Equation of State is briefly discussed in Ch. 5 of the book by Reif. It is an empirical, crude attempt to improve on the Ideal Gas Model by allowing gas molecules to interact with each other. For one mole of non-ideal gas this equation of state is...
2. At 20 °C hydrogen gas follows the following equation of state: PV = RT (1 + 5.14 x 10-3 P + 1.09 x 10-5 p2) in this equation V is the molar volume. Determine the fugacity and fugacity coefficient of hydrogen gas at 20 °C and 1 atm.
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....
The state of an ideal gas can be represented by a point on a PV
(pressure-volume) diagram. If you know the quantity of gas, n, a
unique point in pressure (P) and volume (V) can be used to
determine a temperature (T). Each point on a PV diagram also has a
single internal energy (U) assigned to it. If a process starts at a
point and returns to that same point on a PV diagram, it returns to
the same...
An ideal vapor-compression refrigeration cycle that uses refrigerant R-134a as its working fluid maintains a condenser at 800 kPa and the evaporator at -12C. (a) Determine this system's COP and the amount of power required to service a 150kW cooling load. (b) Determine the P,T, h, S and exergy of R-134a at all four states of the entire cycle. Assume the ambient temperature to be 25C.
.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...
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