Vapour compression refrigerator in a food processing plant comprises of compressor, condenser, expansion valve and evaporator uses ammonia as a working fluid. It operates between temperature limits of 30 C to -20 C. The mass flowrate of the ammonia is 0.25kg.s'.

a) Calculate the refrigeration effect and coefficient of performance if the refrigeration cycle is a reversed Carnot cycle.

b) The expansion valve in the refrigeration cycle is substituted with throttling valve and

the corresponding refrigeration cycle is shown in Figure 1. Comment the change of

refrigeration effect and coefficient of performance in comparison to the answer in (a).

c) Calculate the refrigeration effect and coefficient of performance for the refrigeration cycle in (b) to support your answer in (b).

please solved it according to the question.

avoid to using other work if not i will report to the chegg

QUESTION 3 Vapour compression refrigerator in a food processing plant comprises of compressor, condenser, expansion valve and evaporator uses ammonia as a working fluid. It operates between temperature limits of 30 C to -20 C. The mass flowrate of the ammonia is 0.25 kg.s. (a) Calculate the refrigeration effect and coefficient of performance if the refrigeration cycle is a reversed Carnot cycle. (14 Marks) (b) The expansion valve in the refrigeration cycle is substituted with throttling valve and the corresponding refrigeration cycle is shown in Figure 1. Comment the change of refrigeration effect and coefficient of performance in comparison to the answer in (a). (5 Marks) A Figure 1: The refrigeration cycle c) Calculate the refrigeration effect and coefficient of performance for the refrigeration cycle in (b) to support your answer in (b). (6 Marks)