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A liquid-vapor mixture of refrigerant-134a is at -10°C with a quality of 40 percent. Determine the...
A vessel with a volume of 0.008 m3 contains a liquid-vapor mixture of refrigerant 134a at...
A vessel with a volume of 0.008 m3 contains a liquid-vapor mixture of refrigerant 134a at 200 kPa and a quality of 20%. Determine: a) the mass of vapor present in kg, and b) the fraction of the total volume occupied by the liquid.
An insulated rigid vessel contains 5kg of saturated liquid-vapor mixture of Refrigerant- 134a at 200kPa. At...
An insulated rigid vessel contains 5kg of saturated liquid-vapor mixture of Refrigerant- 134a at 200kPa. At this stage, one-fifth of the mass is in vapor phase and rest is in liquid. Now using an electrical resistance heater, heat is supplied to the contents of the vessel until all of the refrigerant is converted to saturated vapor. Show this process on a P v diagram with respect to saturation lines and determine, 1. volume of the rigid vessel 2. temperature, in...
R-134a enters an adiabatic throttle as a compressed liquid at 18°C. If the refrigerant leaves the...
R-134a enters an adiabatic throttle as a compressed liquid at 18°C. If the refrigerant leaves the throttle at 70 kPa, determine the quality, in percent of the exit stream. Give your answer to 3 significant figures. Throttling valve R-134a Saturated Mixture Compressed Liquid
3.12 w A tank contains a two-phase liquid-vapor mixture of Refrigerant 22 at 10 bar. The...
3.12 w A tank contains a two-phase liquid-vapor mixture of Refrigerant 22 at 10 bar. The mass of saturated liquid in the tank is 25 kg and the quality is 60%. Determine the volume of the tank, in mº, and the fraction of the total volume occupied by saturated vapor.
What is the enthalpy (kJ/kg) of refrigerant 134a which is at 4 C and quality 40%?...
What is the enthalpy (kJ/kg) of refrigerant 134a which is at 4 C and quality 40%? Select one: a. h = 204.57 kJ/kg. O b. h = 96.35 kJ/kg. O c. h = 135.46 kJ/ kg. O d.h = 115.90 kJ/kg. O e. h = 155.02 kJ/kg.
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...
Refrigerant-134a enters the evaporator coils of a refrigerator at -20°C with a quality of 15 percent...
Refrigerant-134a enters the evaporator coils of a refrigerator at -20°C with a quality of 15 percent and leaves at the same pressure as saturated vapor. If the compressor consumes 450 W of power and the COP the refrigerator is 1.5, determine (a) the mass flow rate of the refrigerant and (b) the rate of heat rejected to the kitchen air.
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...
(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...
Determine whether refrigerant R-410a in each of the following states is a subcooled liquid, a superheated...
Determine whether refrigerant R-410a in each of the following states is a subcooled liquid, a superheated vapor, or a mixture of saturated liquid and vapor. a) 45 ˚C, 0.008 m3/kg b) 0.9 MPa, 5 ˚C c) 101 kPa, 0.2 m3/kg d) –20 ˚C, 0.4 MPa
An insulated rigid vessel contains 5kg of saturated liquid-vapor mixture of Refrigerant- 134a at 200kPa. At this stage, one-fifth of the mass is in vapor phase and rest is in liquid. Now using an electrical resistance heater, heat is supplied to the contents of the vessel until all of the refrigerant is converted to saturated vapor. Show this process on a P v diagram with respect to saturation lines and determine, 1. volume of the rigid vessel 2. temperature, in...
R-134a enters an adiabatic throttle as a compressed liquid at 18°C. If the refrigerant leaves the throttle at 70 kPa, determine the quality, in percent of the exit stream. Give your answer to 3 significant figures. Throttling valve R-134a Saturated Mixture Compressed Liquid
3.12 w A tank contains a two-phase liquid-vapor mixture of Refrigerant 22 at 10 bar. The mass of saturated liquid in the tank is 25 kg and the quality is 60%. Determine the volume of the tank, in mº, and the fraction of the total volume occupied by saturated vapor.
What is the enthalpy (kJ/kg) of refrigerant 134a which is at 4 C and quality 40%? Select one: a. h = 204.57 kJ/kg. O b. h = 96.35 kJ/kg. O c. h = 135.46 kJ/ kg. O d.h = 115.90 kJ/kg. O e. h = 155.02 kJ/kg.
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...
Refrigerant-134a enters the evaporator coils of a refrigerator at -20°C with a quality of 15 percent and leaves at the same pressure as saturated vapor. If the compressor consumes 450 W of power and the COP the refrigerator is 1.5, determine (a) the mass flow rate of the refrigerant and (b) the rate of heat rejected to the kitchen air.
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...
(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...
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