note: the solution will be on paper
note : Please can you show me how to use the thermodynamic table and how to use the PH chart, I apologize for the inconvenience.
| A large refrigeration plant is to be maintained at -10 C. It requires refrigeration rate of 150 kW. The condenser of the plant is to be cooled by liquid water, which experiences a temperature rise of 10 C as it flows over the coils of the condenser. Assuming the plant operates on an ideal vapor-compression cycle using refrigerant R134a between the pressure limits of 100 and 700 kPa, determine the following: |
| (1) Using didactic sketches, evaluate the operating principles of a refrigeration system (2) the mass flow rate of the refrigerant. (3) the power input to the compressor. (4) the mass flow rate of the cooling water. (5) The coefficient of performance for the ideal cycle operating between 100 and 700 KPa using thermodynamic tables. (6) The coefficient of performance for the ideal cycle operating between 100 and 700 KPa using the p-h chart. (7) Illustrate the contradiction between refrigeration cycles and the second law of thermodynamics |