tim126
29-07-2010, 02:40 PM
How to calculate usage of a refrigerator?
I am using a refrigerator (model No FRT18SJGW1) given by my landlord, which consists of a freezer compartment on the top and a bigger fridge compartment below. There are two questions I would like to ask you guys:
1. There is a label in its fridge compartment saying:
Electrial ratings: Amps 4.75, Volts 115, Hertz 60
I tried to compute its energy usage per year, and here is my computation:
4.75 Amps * 115 Volts * 0.001 * 24 hrs * 365 days = 4785.15 kWh/year
I looked up its model No FRT18SJG*1 (FRT18SJGW1) on www(dot)energystar(dot)gov(slash)index.cfm?fuseaction=refrig.calculator, and found that it uses 766 kWh/year.
Sorry for the inconvenience in the link (I am not allowed to post URLs to other sites because I haven't made 15 posts or more).
Although I know both my computation and the website are estimates, they are too far different. What has been wrong? How can I do the calculation correctly?
2. I was also wondering what the refrigerator's power should be like after being used for 12 years, and if the amount 766 kWh/year shown at energystar website has taken into account the age of the refrigerator?
Thanks and regards!
I am using a refrigerator (model No FRT18SJGW1) given by my landlord, which consists of a freezer compartment on the top and a bigger fridge compartment below. There are two questions I would like to ask you guys:
1. There is a label in its fridge compartment saying:
Electrial ratings: Amps 4.75, Volts 115, Hertz 60
I tried to compute its energy usage per year, and here is my computation:
4.75 Amps * 115 Volts * 0.001 * 24 hrs * 365 days = 4785.15 kWh/year
I looked up its model No FRT18SJG*1 (FRT18SJGW1) on www(dot)energystar(dot)gov(slash)index.cfm?fuseaction=refrig.calculator, and found that it uses 766 kWh/year.
Sorry for the inconvenience in the link (I am not allowed to post URLs to other sites because I haven't made 15 posts or more).
Although I know both my computation and the website are estimates, they are too far different. What has been wrong? How can I do the calculation correctly?
2. I was also wondering what the refrigerator's power should be like after being used for 12 years, and if the amount 766 kWh/year shown at energystar website has taken into account the age of the refrigerator?
Thanks and regards!