A vapor-compression refrigeration system using ammonia as refrigerant is to be used to cool 45,000kg of water from 29C to 18C in five hours. The enthalpies in kJ/kg are as follows: evaporator exit= 1471.6, compressor outlet= 165O, condenser outlet= 410.4. Calculate the compressor work in kW. a. 19.445

Specify the C.O.P. of the cycle vapor compression refrigeration simple R-134a. Temperature evaporation is -10 °C and the temperature of the condenser is 30 °C. (COP is found using enthalpy)

Please not Ai generated, show all steps in need to understand. Use table vaules thermodynamics engineering aprproch 10th.

3. The system in Problem 2 assumes the AT for heat transfer between the refrigeration system condenser and the environment is zero, and the AT between the refrigeration system evaporator and the cold space is zero. This gives us the best possible performance, but it is unrealistic as you need some reasonable AT to drive the heat transfer. Assume you have a Carnot refrigerator that provides the same 10.55 kW of cooling, but the condenser operates at 35°C and the evaporator is at -15°C. These then, respectively, push heat to the environment at 20°C and pull heat out of the 0°C cold space, as shown in the figure. Assuming the cycle itself (i.e., inside the dashed line) still operates as a Carnot refrigerator, find the electric power needed to generate the 3-tons of cooling capacity, the daily cost for this electricity, and COPR. Environment=20°C QH QH Q₁ Q₁ Cold Space=0°C 35°C W -15°C