Question

Problems 15 and 16 wre based on the following description A household refrigerator runs 20 minutes in every hour and removes het trom the food compartment is 1200 The COP of the refrigerator is 2.1 The power the refrigerator draws when running in Wiscover 0.23 0.66 0.82 000 0.27 2.1 1 pts Question 16 Assuming a cost of electricity of 0.10 $/kWh, the cost in $ to operate this refrigerator per day is closer to 1.2 045 089 15

Answer 1

Refrigerator cop Saturday, August 1, 2020 IS 0.27KW 3:07 AM Refrigeration effect (RE) - Heat oemoved = 2100 kJ/ht COP 9.1 we know cop = RE where W electrical work input w=10ooks Ihr al 2100 Jooo x low xlo 3600 w= 0.27 kw 06 running time per hour 20 minutes Total running time in time in 24 hrs = 24x200 =8hrs ca 01 $/kWh , Tolal energy consumption for day , E = 0.27 x8 kWh cost of electricity Total cost (6)= 0.27X8 X0:1 C; = 0.22$