A vapor-compression refrigeration system circulates refrigerant 134a at a rate of 0.15 kg/s. The refrigerant enters the compressor at -10 degrees Celcius and 100 kPa, and exits the compressor at 800 kPa. The isentropic efficiency of the compressor is 76%. Pressure drop through the condenser and evaporator are negligible. The refrigerant exits the condenser at 30 degrees Celcius and 800 kPa. Ignoring the heat transfer between the compressor and its surroundings, determine: The rate at which heat energy is removed from the refrigerated space in kW. The coefficient of perfromance.

Question
Asked Apr 24, 2019
416 views

A vapor-compression refrigeration system circulates refrigerant 134a at a rate of 0.15 kg/s. The refrigerant enters the compressor at -10 degrees Celcius and 100 kPa, and exits the compressor at 800 kPa. The isentropic efficiency of the compressor is 76%. Pressure drop through the condenser and evaporator are negligible. The refrigerant exits the condenser at 30 degrees Celcius and 800 kPa. Ignoring the heat transfer between the compressor and its surroundings, determine:

  • The rate at which heat energy is removed from the refrigerated space in kW.
  • The coefficient of perfromance.

Expert Answer

Want to see the step-by-step answer?

See Answer

Check out a sample Q&A here.

Want to see this answer and more?

Step-by-step answers are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Answer
*Response times may vary by subject and question.
Tagged in

Related Mechanical Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: on the plates A and B, which are moving in opposite directions as shown. If vA = 75 mm/s to The atta...

A: Consider the diagram when the wheels roll.

Q: Steam enters a turbine operating at a steady state at a pressure of 4 MPa, at temperature of 400 deg...

A: Write the energy balance equation for the steady flow turbine as given as follows:

Q: Pearson's MyLab & MasteringMasteringEngineering Mastering x+ C https://session.masteringengineering....

A: The velocity of the airplane is constant at point A, the speed is vp = 80 ft/sThe weight of the pilo...

Q: The flexible band F is attached at E to the rotating sector and leads over the guide pulley G. Deter...

A: Draw the schematic diagram of the link BA as shown in figure (1).

Q: A piston-cylinder device initially contains 0.15 kg of air initially at 2 MPa and 350℃. The air firs...

A: Question is to find the boundary work for each process and net work of the cycle.The cyclic process ...

Q: What number would you divide by to calculate the mean of 3, 4, 5, and 6?

A: We can find the mean of “N” numbers by using the following relation:

Q: A load of 150 lbs is exerted on a piston confining oil in a circular cylinder with an inside diamete...

A: Write the expression to obtain the area of the piston. 

Q: How much natural gas do you need to burn to heat 20 liters of water from 0 degrees C to 30 degrees C

A: Write the expression of density of water. 

Q: Seven kilograms of air is contained in a constant volume tank at 327 degrees C and 120 kPa, then is ...

A: Calculate the entropy change of the air.