Refrigerator and its light bulb

AI Thread Summary
A malfunctioning switch keeps a 30-W incandescent light bulb on continuously in a refrigerator, leading to increased energy consumption. The refrigerator has a coefficient of performance (COP) of 1.4, which affects the energy required to maintain its cooling function. With the refrigerator door opened 50 times daily for 30 seconds each time, the total energy cost can be calculated based on the continuous operation of the light bulb. The cost of electricity is Rp 1200 per kWh, and the increase in energy consumption and monthly costs need to be determined. Calculating the total energy used, including the light bulb's consumption, is essential for understanding the financial impact of the malfunction.
wildanpradana
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The interior lighting of the refrigerators is provided by
incandescent lamps whose switches are actuated by the opening of the
refrigerator door. Consider a refrigerator whose 30-W lightbulb
remains on continuously as a result of a malfunction of the switch. If
the refrigerator has a COP of 1.4 and the cost of electricity is Rp
1200/kWh, determine the increase in the energy consumption of the
refrigerator and its cost per month (1 month = 30 days) if the switch
is not fixed. Assuming the refrigerator is opened 50 times a day for
an average of 30 s.




COP= QL/(QH-QL)
COP= Qin/Win



Please help me for this. thanks a lot!
 
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wildanpradana said:
The interior lighting of the refrigerators is provided by
incandescent lamps whose switches are actuated by the opening of the
refrigerator door. Consider a refrigerator whose 30-W lightbulb
remains on continuously as a result of a malfunction of the switch. If
the refrigerator has a COP of 1.4 and the cost of electricity is Rp
1200/kWh, determine the increase in the energy consumption of the
refrigerator and its cost per month (1 month = 30 days) if the switch
is not fixed. Assuming the refrigerator is opened 50 times a day for
an average of 30 s.




COP= QL/(QH-QL)
COP= Qin/Win
You will have to show us your thoughts on this. To start, what is the rate of work that the refrigerator motor has to do to remove 30 W of heat?

AM
 
When you've worked out the energy required for the refrigerator to pump out the heat, don't forget to add the original 30W of electricity consumed by the bulb to the total. It's all got to be paid for!
 
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