You are an engineer for a plastics manufacturing company. in examining cost-saving measures, your team has brainstormed the following ideas (labeled idea a and idea b). it is your responsibility to evaluate these ideas and recommend which one to pursue. you have been given a graph of the current process. a copy of this graph has been provided online; you may use one of these graphs, or use graph paper as directed by your instructor.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.