A vapor compression refrigeration cycle utilizes R-134a as the working fluid. The refrigerant flow rate is 50 g/s. Vapor at 150 kPa and -10 0C enters the compressor and leaves at 1.2 MPa and 75 0C. Th...
A vapor compression refrigeration cycle utilizes R-134a as the working fluid. The refrigerant flow rate is 50 g/s. Vapor at 150 kPa and -10 0C enters the compressor and leaves at 1.2 MPa and 75 0C. The power input to the non-adiabatic compressor is measured and found to be 2.4 kW. The refrigerant enters the expansion valve at 1.15 MPa and 40 0C and leaves the evaporator at 160 kPa and -15 0C. Determine the entropy generation in the compression process, the refrigeration capacity and the COP of the cycle. The following processes are present in an ideal vapor-compression cycle.
Homework Answers
Add Answer to:
A vapor compression refrigeration cycle utilizes R-134a as the working fluid. The refrigerant flow rate is 50 g/s. Vapor at 150 kPa and -10 0C enters the compressor and leaves at 1.2 MPa and 75 0C. Th...
A two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit uses refrigerant-134a as working fluid....
A two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit uses refrigerant-134a as working fluid. The system operates the evaporator at 0.4 MPa, the condenser at 1.6 MPa, and the separator at 0.8 MPa. The compressors use 25 kW of power. Given that the refrigerant is saturated liquid at the inlet of each expansion valve and saturated vapor at the inlet of each compressor, and the compressors are isentropic: (0) show the process on a T-s diagram; ) calculate...
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...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34°C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat transfer...
(12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle....
(12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. The cycle operates between 200 kPa and 1.2 MPa. The refrigerant flows through the cycle at a rate of 0.019 kg/s. The (actual) refrigerator has a compressor with an isentropic efficiency of 85%. The refrigerant enters the compressor slightly superheated by 56 C hint add this to the saturation temperature). The refrigerant leaves the condenser slightly subcooled by 1.9°C. What is the rate of...
Refrigerant 134a is the working fluid in an ideal vapor-compression refrigeration cycle. Saturated vapor enters the...
Refrigerant 134a is the working fluid in an ideal vapor-compression
refrigeration cycle. Saturated vapor enters the compressor at h =
400 J/kg and saturated liquid leaves the condenser at h= 242 J/kg.
If the mass flow rate of the refrigerant is 0.08 kg/s, and
superheated vapor exits the compressor at h = 420 J/kg, pression
work will be equal to 1.6 kW
inch-h) 6.08(420 - 6oo) = 1.6
Tt (12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression...
Tt
(12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. The cycle operates between 200 kPa and 1.2 MPa. The refrigerant flows through the cycle at a rate of 0.015 kg/s. The actual) refrigerator has a compressor with an isentropic efficiency of 82%. The refrigerant enters the compressor slightly superheated by 6.2°C (hint: add this to the saturation temperature). The refrigerant leaves the condenser slightly subcooled by 1.8°C. What is the rate of...
11-11 A refrigerator operates on the ideal vapor-compression refrigeration cycle and uses refrigerant-134a as the working...
11-11 A refrigerator operates on the ideal vapor-compression refrigeration cycle and uses refrigerant-134a as the working fluid. The condenser operates at 1.6 MPa and the evaporator at -6oC. If an adiabatic, reversible expansion device were available and used to expand the liquid leaving the condenser, how much would the COP improve by using this device instead of the throttle device?
Thermodynamics. No interpolation needed. Problem #3. Refrigerant 134a is the working fluid for vapor-compression refrigeration cycle....
Thermodynamics. No interpolation needed.
Problem #3. Refrigerant 134a is the working fluid for vapor-compression refrigeration cycle. The evaporator temperature is 8°C and the condenser pressure is 12 bar. Saturated vapor enters the compressor and superheated vapor enters the condenser at 60°C and exits the condenser as saturated liquid. For a refrigeration capacity of 8 tons or 2.816 x104 J/s determine the following: (1) The refrigerant mass flow rate in kg/s; (2) The compressor isentropic efficiency [Hint: Interpolation is required); (3)...
A two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit uses refrigerant-134a as working fluid. The system operates the evaporator at 0.4 MPa, the condenser at 1.6 MPa, and the separator at 0.8 MPa. The compressors use 25 kW of power. Given that the refrigerant is saturated liquid at the inlet of each expansion valve and saturated vapor at the inlet of each compressor, and the compressors are isentropic: (0) show the process on a T-s diagram; ) calculate...
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...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34°C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat transfer...
(12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. The cycle operates between 200 kPa and 1.2 MPa. The refrigerant flows through the cycle at a rate of 0.019 kg/s. The (actual) refrigerator has a compressor with an isentropic efficiency of 85%. The refrigerant enters the compressor slightly superheated by 56 C hint add this to the saturation temperature). The refrigerant leaves the condenser slightly subcooled by 1.9°C. What is the rate of...
Refrigerant 134a is the working fluid in an ideal vapor-compression
refrigeration cycle. Saturated vapor enters the compressor at h =
400 J/kg and saturated liquid leaves the condenser at h= 242 J/kg.
If the mass flow rate of the refrigerant is 0.08 kg/s, and
superheated vapor exits the compressor at h = 420 J/kg, pression
work will be equal to 1.6 kW
inch-h) 6.08(420 - 6oo) = 1.6
Tt
(12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. The cycle operates between 200 kPa and 1.2 MPa. The refrigerant flows through the cycle at a rate of 0.015 kg/s. The actual) refrigerator has a compressor with an isentropic efficiency of 82%. The refrigerant enters the compressor slightly superheated by 6.2°C (hint: add this to the saturation temperature). The refrigerant leaves the condenser slightly subcooled by 1.8°C. What is the rate of...
Thermodynamics. No interpolation needed.
Problem #3. Refrigerant 134a is the working fluid for vapor-compression refrigeration cycle. The evaporator temperature is 8°C and the condenser pressure is 12 bar. Saturated vapor enters the compressor and superheated vapor enters the condenser at 60°C and exits the condenser as saturated liquid. For a refrigeration capacity of 8 tons or 2.816 x104 J/s determine the following: (1) The refrigerant mass flow rate in kg/s; (2) The compressor isentropic efficiency [Hint: Interpolation is required); (3)...
Most questions answered within 3 hours.
-
Modern Human Relations at the workplace- Human resource
management
Communities of practice (COPs) refers to groups...
asked 7 minutes ago -
Briefly compare and contrast Array Processors and
Multiprocessors. Mention at least two similarities and three
dissimilarities.
asked 7 minutes ago -
When looking at the unemployment rates for various countries,
which of the following is a reason...
asked 8 minutes ago -
calculate the ratio of the two iconic forms that exist in solution
for the amino acid...
asked 19 minutes ago -
1. A black hole with a larger mass will have a __________
thermal luminosity.
2. From...
asked 24 minutes ago -
Which is a criterion-referenced standard?
Someone who is accepted into graduate school.
Someone who is of...
asked 34 minutes ago -
A beaker with 1.90×102 mL of an acetic acid buffer
with a pH of 5.000 is...
asked 34 minutes ago -
define the concept of emotional labor. describe,
explain and discuss perspectives on emotional labor in general...
asked 35 minutes ago -
The unsigned decimal value (1,036)(base 10) is to be stored as a
16-bit word in memory....
asked 36 minutes ago -
(1 point) For a group of 80 people, assuming that each person is
equally likely to...
asked 57 minutes ago -
How
did you determine that the Margin of Error is 1? I got 1.435
asked 54 minutes ago -
Calculate the percent ionization of formic acid solutions having
the following concentrations? (This is all that...
asked 1 hour ago