electrical calculation please
We are looking at a portable dehumidifier. It apparently runs off a/c via a d/c adapter. specs says it draws 20w DC and is " energy efficient " How much of and energy hog will it actually be?...
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20W is 20W, basically. There is a bit of loss due to the AC to DC conversion, but probably not more than about 5% or 10% these days.
20W * 24 hrs = 480 Wh per day, or about 1/2 kWh per day. Call it 15 kWh per month, assuming it's operating constantly. Not a huge amount of electricity, though it does add up to something.
I rather doubt a 20W dehumidifier is large enough to do anything useful in a house. I kind of suspect it may be based around a thermoelectric cooler (with a fan and a few other bits), which is hardly energy efficient in terms of the energy consumed vs. the cooling it produces (and hence how much water it condenses out of the air). How many pints per day is it rated for? Of course, it's perhaps possible that I'm completely wrong on what this device is or how it works, so maybe it's indeed very energy efficient...I just have my doubts.
20W * 24 hrs = 480 Wh per day, or about 1/2 kWh per day. Call it 15 kWh per month, assuming it's operating constantly. Not a huge amount of electricity, though it does add up to something.
I rather doubt a 20W dehumidifier is large enough to do anything useful in a house. I kind of suspect it may be based around a thermoelectric cooler (with a fan and a few other bits), which is hardly energy efficient in terms of the energy consumed vs. the cooling it produces (and hence how much water it condenses out of the air). How many pints per day is it rated for? Of course, it's perhaps possible that I'm completely wrong on what this device is or how it works, so maybe it's indeed very energy efficient...I just have my doubts.
