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Saturated vapor refrigerant R134a is stored at 20 psia and has a volume of 2.2781 ft3/lbm....
A 17-ft3 rigid tank initially contains saturated refrigerant-134a vapor at 160 psia. As a result of...
A 17-ft3 rigid tank initially contains saturated refrigerant-134a vapor at 160 psia. As a result of heat transfer from the refrigerant, the pressure drops to 50 psia. a.) Determine the final temperature. Use data from refrigerant tables. (Please provide an answer before moving on to the next part.) b.) Determine the amount of refrigerant that has condensed.(lbm) (Please provide an answer before moving on to the next part.) c.) Determine the heat transfer. (Btu)
Five lbm/min of Refrigerant 134a enters a water-jacketed compressor as a saturated vapor at 10 psia...
Five lbm/min of Refrigerant 134a enters a water-jacketed compressor as a saturated vapor at 10 psia and is discharged at 140 psia, 120°F. The power supplied to run the compressor is 10 HP. Cooling water enters the water-jacket at 70°F and leaves at 100°F. Determine the mass flow rate of the cooling water.
2) A mixture of 4 lbm of CO2 and 3 lbm of N2 is stored in a tank with a volume of 5 ft3. The temp...
2) A mixture of 4 lbm of CO2 and 3 lbm of N2 is stored in a tank with a volume of 5 ft3. The temperature of the mixture is maintained at 80°F. Evaluate: (a) the total pressure of the mixture, (b) the mole fraction of both the gases, (c) the molecular weight of the mixture, and (d) the apparent specific gas constant of the mixture. (30 pts.) A mixture of 4 lbm of CO2 and 3 lbm of N2...
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...
6.5 lbm/s of refrigerant 134a initially at 40 psia and 60 F is throttled adiabatically to...
6.5 lbm/s of refrigerant 134a initially at 40 psia and 60 F is throttled adiabatically to 20 psia ft a) What is the volumetric flow rate before throttling? b) What is the volumetric flow rate after throtting? (Assume that the change in kinetic energy is negligible.) c) What is the temperature after throttling?
Problem-3 (200) In a vapor-compression refrigeration cycle, R134a exits the evaporator as saturated vapor at -32°C....
Problem-3 (200) In a vapor-compression refrigeration cycle, R134a exits the evaporator as saturated vapor at -32°C. The refrigerant enters the condenser at 14 bar and 170°C, and saturated liquid exits at 14 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. If the mass flow rate is 2.987 kg/s, determine (a) Refrigeration capacity in KW (100) (b) The power input to the compressor,...
Problem (25 points) A typical R134a dry vapor compression refrigerator has a COP of about 1.3 when operating betwee...
Problem (25 points) A typical R134a dry vapor compression refrigerator has a COP of about 1.3 when operating between 15° C and 30° C. For a refrigerator rated at 0.1 tons of refrigeration. Determine the power required and the mass flow rate of R134a. Assume that the refrigerant is saturated liquid leaving the condenser.
Problem (25 points) A typical R134a dry vapor compression refrigerator has a COP of about 1.3 when operating between 15° C and 30° C. For a...
Water at 50°F and 20 psia is heated in a chamber by mixing it with saturated...
Water at 50°F and 20 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. If both streams enter the mixing chamber at the same mass flow rate, determine the quality of the exiting stream to 3 significant digits (don't forget a leading o if needed). Mixing section
2 lbm of water at 300 psia completely fill a weighted piston-cylinder device whose volume is...
2 lbm of water at 300 psia completely fill a weighted piston-cylinder device whose volume is 2.5 ft3. The water is then heated at constant pressure until the temperature reaches 500°F. Determine the resulting change in the water's total entropy in Btu/R.
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.
2) A mixture of 4 lbm of CO2 and 3 lbm of N2 is stored in a tank with a volume of 5 ft3. The temperature of the mixture is maintained at 80°F. Evaluate: (a) the total pressure of the mixture, (b) the mole fraction of both the gases, (c) the molecular weight of the mixture, and (d) the apparent specific gas constant of the mixture. (30 pts.) A mixture of 4 lbm of CO2 and 3 lbm of N2...
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...
6.5 lbm/s of refrigerant 134a initially at 40 psia and 60 F is throttled adiabatically to 20 psia ft a) What is the volumetric flow rate before throttling? b) What is the volumetric flow rate after throtting? (Assume that the change in kinetic energy is negligible.) c) What is the temperature after throttling?
Problem-3 (200) In a vapor-compression refrigeration cycle, R134a exits the evaporator as saturated vapor at -32°C. The refrigerant enters the condenser at 14 bar and 170°C, and saturated liquid exits at 14 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure. If the mass flow rate is 2.987 kg/s, determine (a) Refrigeration capacity in KW (100) (b) The power input to the compressor,...
Problem (25 points) A typical R134a dry vapor compression refrigerator has a COP of about 1.3 when operating between 15° C and 30° C. For a refrigerator rated at 0.1 tons of refrigeration. Determine the power required and the mass flow rate of R134a. Assume that the refrigerant is saturated liquid leaving the condenser.
Problem (25 points) A typical R134a dry vapor compression refrigerator has a COP of about 1.3 when operating between 15° C and 30° C. For a...
Water at 50°F and 20 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. If both streams enter the mixing chamber at the same mass flow rate, determine the quality of the exiting stream to 3 significant digits (don't forget a leading o if needed). Mixing section
2 lbm of water at 300 psia completely fill a weighted piston-cylinder device whose volume is 2.5 ft3. The water is then heated at constant pressure until the temperature reaches 500°F. Determine the resulting change in the water's total entropy in Btu/R.
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