1. A refrigeration system is to be designed to maintain the temperature in the range of -15C to -5C, while the outside temperature varies from 15C to 25C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that QL = 26 kW. The compressor efficiency could range from 60 to 80 percent. This is to be completed individually. It would be highly unlikely for multiple students to select all the same design parameters in part (a). Oll Compressor Condenser Expansion valve or capillary tube 00:1 Work Evaporator Q As part of the design, you should: a. Specify and justify the constraints (isentropic efficiency, condenser, and evaporator temperature) you chose. b. Show the cycle in relation to the two-phase region on a temperature-entropy (T-S) diagram. Using R-22 as the working fluid: c. Determine the temperatures and pressures at the different points in the cycle (points 1, 2, 3, and 4). d. Determine the coefficient of performance value and the mass flow rate of the working fluid. Using R-410a as the working fluid: e. Determine the temperatures and pressures at the different points in the cycle (points 1, 2, 3, and 4). f. Determine the coefficient of performance value and the mass flow rate of the working fluid. Using ammonia (NH3) as the working fluid: g. Determine the temperatures and pressures at the different points in the cycle (points 1, 2, 3, and 4). h. Determine the coefficient of performance value and the mass flow rate of the working fluid. i. Based on your analysis of the design using the three refrigerants and based on considerations for health, safety, welfare, as well as global, cultural, social, environmental, and economic factors, which of the three refrigerants would you recommend for use in this refrigeration cycle? Be sure to provide appropriate references to justify your recommendation