0.1 kg/s of R-134 enters a throttle valve as a saturated liquid at 60◦C, and exits...
0.1 kg/s of R-134 enters a throttle valve as a saturated liquid at 60◦C, and exits at 90 kPa. Calculate the rate of entropy generation.
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0.1 kg/s of R-134 enters a throttle valve as a saturated liquid
at 60◦C, and exits...
0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits...
0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits at 4 MPa. Calculate the input power required by the pump. Select one: O a. 4 kW O b. -4 kJ/kg O c.4kJ
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
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...
Figure provides steady-state data for a throttling valve in series with a heat exchanger. Saturated liquid...
Figure provides steady-state data
for a throttling valve in series with a heat exchanger. Saturated
liquid Refrigerant 134a enters the valve at T1 = 36 degrees Celsius
with a mass flow rate of 0.26 kg/s and is throttled to T2 = -8
degrees Celsius. The refrigerant then enters the heat exchanger,
exiting as saturated vapor with no significant decrease in
pressure. In a separate stream, liquid water enters the heat
exchanger at T4 = 20 degrees Celsius and exits as...
A vapo the condenser is saturated liquid with an enthalpy of 220 kJ/kg. The outlet stream of the ...
A vapo the condenser is saturated liquid with an enthalpy of 220 kJ/kg. The outlet stream of the evaporator has a absolute pressure of 0.1 MPa, and is superheated vapor that is 30 °C above the dew point. a) (7 points) If the outlet stream of the compressor is superheated vapor at 90 °C, what is the efficiency of the compressor? AH H3- H2, (AH)s - H3-H2 b) (6 points) Calculate the coefficient of performance for this refrigerator r-compression refrigeration...
Thermodynamics: Valve and Heat Exchange 4.95
Figure P4.95 provides steady-state data for a throttling valve in series with a heat exchanger. Saturated liquid Refrigerant134a enters the valve atT1=36 degrees C with a mass flow rate of 0.26 kg/s and is throttled to T2 = -8degrees C. The refrigerant then enters the heat exchanger, exiting as saturated vapor with no significant decrease in pressure. In a separate stream, liquid water enters the heat exchanger at T4 = 20 degrees C and exits as a liquid atT5= 10...
Ammonia flows at 250 kg/s through an ideal vapor-compression refrigeration cycle. The ammonia enters the compressor...
Ammonia flows at 250 kg/s through an ideal vapor-compression refrigeration cycle. The ammonia enters the compressor as saturated vapor at-10°C and exits the condenser as saturated liquid at 1000 kPa. Determine the: (a) refrigerant temperature leaving the compressor (b) refrigerant temperature leaving the condenser (c) refrigerant temperature leaving the expansion valve (d) coefficient of performance (e) refrigeration capacity, in tons.
/5 2- Saturated vapor enters the turbine at 8MP and saturated liquid exits the condenser at...
/5 2- Saturated vapor enters the turbine at 8MP and saturated liquid exits the condenser at a pressure of 0.008 MPa. The isentropic efficiency of the turbine is 85%. Determine: the quality of the steam at state 2 he 173.88 kJ/kgl and htg 2403.1[kJ/kg] at 0.008 MPa a. 8.0 MPa b. heat added to working fluid in the boiler in 4 c. the thermal efficiency of the cycle 0.008 MPa 2s 2 State h [kJ/kg] 2758 1794.8 173.88 181.92 2s
A sealed rigid tank has 0.1 kg saturated vapor R-410a at 0°C that is cooled to...
A sealed rigid tank has 0.1 kg saturated vapor R-410a at 0°C that is cooled to 20°C by a 20°C heat sink. Thermodynamic properties of R410a at initial and final states are given as: u1 = 253.02 kJ/kg, 51 -1.0368 kJ/kg.k ; u2 - 136.5 kJ/kg; 52 - 0.5946 kJ/kg.K .. Find the heat transfer during the cooling process. b. Calculate the change in entropy of the R-410a c. Determine the change in entropy of heat sink, a. Estimate the...
P1 Ammonia flows at 250 kg/s through an ideal vapor-compression refrigeration cycle. The ammonia enters the...
P1 Ammonia flows at 250 kg/s through an ideal vapor-compression refrigeration cycle. The ammonia enters the compressor as saturated vapor at -10°C and exits the condenser as saturated liquid at 1000 kPa. Determine the: (a) refrigerant temperature leaving the compressor (b) refrigerant temperature leaving the condenser (c) refrigerant temperature leaving the expansion valve (d) coefficient of performance (e) refrigeration capacity, in tons.
0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits at 4 MPa. Calculate the input power required by the pump. Select one: O a. 4 kW O b. -4 kJ/kg O c.4kJ
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
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...
Figure provides steady-state data
for a throttling valve in series with a heat exchanger. Saturated
liquid Refrigerant 134a enters the valve at T1 = 36 degrees Celsius
with a mass flow rate of 0.26 kg/s and is throttled to T2 = -8
degrees Celsius. The refrigerant then enters the heat exchanger,
exiting as saturated vapor with no significant decrease in
pressure. In a separate stream, liquid water enters the heat
exchanger at T4 = 20 degrees Celsius and exits as...
A vapo the condenser is saturated liquid with an enthalpy of 220 kJ/kg. The outlet stream of the evaporator has a absolute pressure of 0.1 MPa, and is superheated vapor that is 30 °C above the dew point. a) (7 points) If the outlet stream of the compressor is superheated vapor at 90 °C, what is the efficiency of the compressor? AH H3- H2, (AH)s - H3-H2 b) (6 points) Calculate the coefficient of performance for this refrigerator r-compression refrigeration...
Ammonia flows at 250 kg/s through an ideal vapor-compression refrigeration cycle. The ammonia enters the compressor as saturated vapor at-10°C and exits the condenser as saturated liquid at 1000 kPa. Determine the: (a) refrigerant temperature leaving the compressor (b) refrigerant temperature leaving the condenser (c) refrigerant temperature leaving the expansion valve (d) coefficient of performance (e) refrigeration capacity, in tons.
/5 2- Saturated vapor enters the turbine at 8MP and saturated liquid exits the condenser at a pressure of 0.008 MPa. The isentropic efficiency of the turbine is 85%. Determine: the quality of the steam at state 2 he 173.88 kJ/kgl and htg 2403.1[kJ/kg] at 0.008 MPa a. 8.0 MPa b. heat added to working fluid in the boiler in 4 c. the thermal efficiency of the cycle 0.008 MPa 2s 2 State h [kJ/kg] 2758 1794.8 173.88 181.92 2s
A sealed rigid tank has 0.1 kg saturated vapor R-410a at 0°C that is cooled to 20°C by a 20°C heat sink. Thermodynamic properties of R410a at initial and final states are given as: u1 = 253.02 kJ/kg, 51 -1.0368 kJ/kg.k ; u2 - 136.5 kJ/kg; 52 - 0.5946 kJ/kg.K .. Find the heat transfer during the cooling process. b. Calculate the change in entropy of the R-410a c. Determine the change in entropy of heat sink, a. Estimate the...
P1 Ammonia flows at 250 kg/s through an ideal vapor-compression refrigeration cycle. The ammonia enters the compressor as saturated vapor at -10°C and exits the condenser as saturated liquid at 1000 kPa. Determine the: (a) refrigerant temperature leaving the compressor (b) refrigerant temperature leaving the condenser (c) refrigerant temperature leaving the expansion valve (d) coefficient of performance (e) refrigeration capacity, in tons.
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