How does a generator produce electrical energy? a. it converts chemical energy to electrical energy b. it converts mechanical energy to electrical energy c. it converts heat energy to electrical energy d. it converts solar energy to electrical energy

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.