• • To complete this assignment follow the instructions Solution has to be typed on a word file and later uploaded in pdf format Any answers must not be copied from any source • Plag of any kind is not acceptable once detected by us • Focus on marks / points to judge the length of answer • Font 12, and use consistent format throughout Q5 8. The specification for a conventional refrigeration unit using Refrigerant-12 (see Rogers and Mayhew, for required data) are: - Temperature in Evaporator = -18°C - Temperature in Condenser = 2.2°C - Refrigerant-12 -0.98 kl.kg¹.K-1 Refrigeration Effect = Rate at which heat is removed from unit - 3.5 kW All polytropic processes of the cycle can be considered to be both reversible as well as adiabatic. (a) Draw a Process Flow Diagram of the refrigeration cycle and sketch the cycle on a T-s Phase Diagram. (b) Determine the Coefficient of Performance of the Refrigeration Cycle. [6 marks] [10 marks] (c) Determine the mass flow rate of refrigerant which enters the compressor to provide 3.5 kW of refrigeration. [4 marks]