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d. What is the function of refrigeration compressor? Answer: e. What...
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.
Condenser Compressor An ideal vapor-compression refrigeration cycle is modified to include a counter-flow heat exchanger as...
Condenser Compressor An ideal vapor-compression refrigeration cycle is modified to include a counter-flow heat exchanger as shown. Refrigerant 134a leaves the evaporator as saturated vapor at 0.10 MPa and is heated at constant pressure to 20°C before entering the compressor. Following isentropic compression to 1.4 MPa, the refrigerant passes through the condenser and exits at 45°C and 1.4 MPa. The liquid then passes through the heat exchanger and enters the expansion valve at 1.4 MPa. The mass flow rate of...
2. MULTIPLE EVAPORATOR/ EXPANSION VALVE A refrigeration installation using Freon 12, comprises one compressor, one condenser...
2. MULTIPLE EVAPORATOR/ EXPANSION VALVE A refrigeration installation using Freon 12, comprises one compressor, one condenser and three evaporators of 10 tonnes, 20 tonnes, and 30 tonnes capacities maintained at 10 C, 5 C and -10 C respectively. The system comprises multiple expansion valves and back pressure check valves. The condenser pressure is 9.609 bar (saturation temp. 40 C). The vapours leaving the evaporator are dry saturated. The liquid refrigerant is sub-cooled by 10 C in the condenser sub-cooler. Assume...
Q1/ Figure 1 shows a refrigeration system of multi evaporators and single compressor using R407C as refrigerant. Th...
Q1/ Figure 1 shows a refrigeration system of multi evaporators and single compressor using R407C as refrigerant. The evaporators provide cooling capacity of 10 and 20 TR at temperatures of -10 °C and 10 °C respectively. The system provided with multi ex valves (the multi expansion valve advantage is that the refrigerant that enters the low temperature evaporator expansion valve is saturated liquid and the flash gas is removed at poirnt 4). The condenser temperature is 50 °C. Calculate 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.
Find a) compressor power, b) heat transfer Refrigeration/Heat Pump Cycle rate to the condenser and c)...
Find a) compressor power, b) heat transfer Refrigeration/Heat Pump Cycle rate to the condenser and c) heat transfer arte to the evaporator P2 800 kPa 2 3 P 800 kPa T2= 80°C Condenser Saturated Assumptions: SSSF, throttle valve and vapour compressor, c) negligible change in kinetic energy and negligible change in potential a COND Expansion/ Throttle W COMP R-134a m 1.5 kg/s Compressor energy valve Evaporator T1=-26.3 °C 1 4-26.3 C Saturated vapour EVAP
A refrigeration system which uses R 134 is to be constructed to produce refrigeration at 20ºF with a capacity of 20 Tons and also at 40 ºF with a capacity of 15 Tons. The condensing temperature is to...
A refrigeration system which uses R 134 is to be constructed to
produce refrigeration at 20ºF with a capacity of 20 Tons and also
at 40 ºF with a capacity of 15 Tons. The condensing temperature is
to be 95ºF. The system is to have two compressors and a flash tank.
The schematic is shown in Figure:
a) Sketch and label in a T –S and P – h diagram for the
system.
b) Calculate the COP for the system...
ycles 1. A refrigeration system operates with a superheated cycle using R134a. The required refrigerating capacity...
ycles 1. A refrigeration system operates with a superheated cycle using R134a. The required refrigerating capacity is 30 TR. The evaporator works at -10 Cand the condenser pressure is 1 MPa. The refrigerant is superheated by 10°C before entering to the compressor. Assume isentropic compression in the compressor and isenthalpic expansion in the expansion valve. Answering the following questions using the ph diagram. and the c Sion in the ring to a) Sketch the process in the p-h diagram and...
2. (10 points) An ideal vapor-compression refrigeration cycle is modified to include a counter- flow heat...
2. (10 points) An ideal vapor-compression refrigeration cycle is modified to include a counter- flow heat exchanger, as shown below. Ammonia leaves the evaporator as saturated vapor at 1.0 bar and is heated at constant pressure to 5 "C before entering the compressor. Following isentropic compression to 18 bar, the refrigerant passes through the condenser, exiting at 40 C, 18 bar. The liquid then passes through the heat exchanger, entering the expansion valve at 18 bar. If the mass flow...
4. (10 points) An ideal vapor-compression refrigeration cycle is modified to include a counter- f...
4. (10 points) An ideal vapor-compression refrigeration cycle is modified to include a counter- flow heat exchanger, as shown below.Ammonia leaves the evaporator as saturated vapor at 1.0 bar and is heated at constant pressure to S "C before entering the compressor. Following isentropic compression to 18 bar, the refrigerant passes through the condenser, exiting at 40 18 bar. The liquid then passes through the heat exchanger, entering the expansion valve at 18 bar. If the mass flow rate of...
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.
Condenser Compressor An ideal vapor-compression refrigeration cycle is modified to include a counter-flow heat exchanger as shown. Refrigerant 134a leaves the evaporator as saturated vapor at 0.10 MPa and is heated at constant pressure to 20°C before entering the compressor. Following isentropic compression to 1.4 MPa, the refrigerant passes through the condenser and exits at 45°C and 1.4 MPa. The liquid then passes through the heat exchanger and enters the expansion valve at 1.4 MPa. The mass flow rate of...
2. MULTIPLE EVAPORATOR/ EXPANSION VALVE A refrigeration installation using Freon 12, comprises one compressor, one condenser and three evaporators of 10 tonnes, 20 tonnes, and 30 tonnes capacities maintained at 10 C, 5 C and -10 C respectively. The system comprises multiple expansion valves and back pressure check valves. The condenser pressure is 9.609 bar (saturation temp. 40 C). The vapours leaving the evaporator are dry saturated. The liquid refrigerant is sub-cooled by 10 C in the condenser sub-cooler. Assume...
Q1/ Figure 1 shows a refrigeration system of multi evaporators and single compressor using R407C as refrigerant. The evaporators provide cooling capacity of 10 and 20 TR at temperatures of -10 °C and 10 °C respectively. The system provided with multi ex valves (the multi expansion valve advantage is that the refrigerant that enters the low temperature evaporator expansion valve is saturated liquid and the flash gas is removed at poirnt 4). The condenser temperature is 50 °C. Calculate 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.
Find a) compressor power, b) heat transfer Refrigeration/Heat Pump Cycle rate to the condenser and c) heat transfer arte to the evaporator P2 800 kPa 2 3 P 800 kPa T2= 80°C Condenser Saturated Assumptions: SSSF, throttle valve and vapour compressor, c) negligible change in kinetic energy and negligible change in potential a COND Expansion/ Throttle W COMP R-134a m 1.5 kg/s Compressor energy valve Evaporator T1=-26.3 °C 1 4-26.3 C Saturated vapour EVAP
A refrigeration system which uses R 134 is to be constructed to
produce refrigeration at 20ºF with a capacity of 20 Tons and also
at 40 ºF with a capacity of 15 Tons. The condensing temperature is
to be 95ºF. The system is to have two compressors and a flash tank.
The schematic is shown in Figure:
a) Sketch and label in a T –S and P – h diagram for the
system.
b) Calculate the COP for the system...
ycles 1. A refrigeration system operates with a superheated cycle using R134a. The required refrigerating capacity is 30 TR. The evaporator works at -10 Cand the condenser pressure is 1 MPa. The refrigerant is superheated by 10°C before entering to the compressor. Assume isentropic compression in the compressor and isenthalpic expansion in the expansion valve. Answering the following questions using the ph diagram. and the c Sion in the ring to a) Sketch the process in the p-h diagram and...
2. (10 points) An ideal vapor-compression refrigeration cycle is modified to include a counter- flow heat exchanger, as shown below. Ammonia leaves the evaporator as saturated vapor at 1.0 bar and is heated at constant pressure to 5 "C before entering the compressor. Following isentropic compression to 18 bar, the refrigerant passes through the condenser, exiting at 40 C, 18 bar. The liquid then passes through the heat exchanger, entering the expansion valve at 18 bar. If the mass flow...
4. (10 points) An ideal vapor-compression refrigeration cycle is modified to include a counter- flow heat exchanger, as shown below.Ammonia leaves the evaporator as saturated vapor at 1.0 bar and is heated at constant pressure to S "C before entering the compressor. Following isentropic compression to 18 bar, the refrigerant passes through the condenser, exiting at 40 18 bar. The liquid then passes through the heat exchanger, entering the expansion valve at 18 bar. If the mass flow rate of...
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