this can't be right...refrigerator uses 460kWh per year and the hot water heater uses 4773? no way imo that they are that far apart

just doesnt seem accurate...last month i used like 350kWh the whole month...bill was 37 and change, and thats with refrigerator, oven, ac, etc being used

5/22/2009 12:50:24 PM

4773 sounds like power used when the heating element is on in watts

read the sticker again

5/22/2009 12:55:59 PM

"4773kWh Estimated yearly electricity use"

5/22/2009 12:58:14 PM

i've done a little googling and 4-5000 kWh/yr sounds average

[Edited on May 22, 2009 at 1:00 PM. Reason : i doubt you'll use nearly that much because it's just you by yourself. those are family numbers]

[Edited on May 22, 2009 at 1:01 PM. Reason : although most of that power probably goes to maintaining, which is the same no matter how many ppl]

[Edited on May 22, 2009 at 1:02 PM. Reason : not much you can do about it]

[Edited on May 22, 2009 at 1:03 PM. Reason : it's impossible to find what you want to know about water heaters due to all the OMG TANKLESS shit]

5/22/2009 1:00:07 PM

maybe you should take some basic engineering classes and learn about energy consumption/coefficient of performance/refrigeration/etc

5/22/2009 1:11:17 PM

but he was too busy learning how to...uh, wait, what do PRT majors learn again?

5/22/2009 1:13:05 PM

COP of the water heater is 1, fridge should be about 13

for every 1 watt of power going into the water heater, you get 1 watt of heat

for every 1 watt of power going into the frigde, you remove 13 watts worth of heat


and its not a hot water heater dipshit, if the water was hot, why would you need to heat it?

5/22/2009 1:46:22 PM

its a hot water maker

5/22/2009 1:53:16 PM

a repeater peter heater?

5/22/2009 1:56:05 PM

Quote :

"and its not a hot water heater dipshit, if the water was hot, why would you need to heat it?"

haha, beat me to it. I came into this thread just to say the same thing. Sorry, it's one of my pet peeves.

5/22/2009 2:07:41 PM

maybe a hot water producer, a hot water generator, or maybe even a hot water creator


a hot water heater might be an ass backwards term for a boiler i guess, but that would be more like a hot water superheater

5/22/2009 2:12:18 PM

wheredawhitewomenat?

5/22/2009 2:27:18 PM

this hot water feels soooooo goood

5/22/2009 2:27:39 PM

Quote :

"although most of that power probably goes to maintaining, which is the same no matter how many ppl"

I would think most of it would go to heating up the cold water to replace the hot (for newer heaters), most newer units are insulated very well.

Also dnl, think about it this way, the specific heat (aka how hard it is to heat/cool a substance) of room temp water (4.1813) is about 4 times that of room temperature air (1.012). http://en.wikipedia.org/wiki/Specific_heat_capacity#Table_of_specific_heat_capacities

On top of that you have to consider the difference between cooling room temp air (75 F or 297 K) to fridge/freezer temps (35 F or 275 K) and heating cold water (70 F maybe?? or 294 K) to hot water temps (140 F or 333 K). The difference between temperature changes is roughly twice as much.

Sooooooooooo that gives you a x4 and x2 or combined x8 multiplier to the energy (Q) needed, which doesn't consider the mass of water or mass of air cooled/heated. This comes from:



so in conclusion:

Quote :

"i doubt you'll use nearly that much because it's just you by yourself. those are family numbers"

[Edited on May 22, 2009 at 2:35 PM. Reason : ]

5/22/2009 2:27:53 PM

Quote :

"and its not a hot water heater dipshit, if the water was hot, why would you need to heat it?"

Quote :

"haha, beat me to it. I came into this thread just to say the same thing. Sorry, it's one of my pet peeves."

that would depend entirely upon your definition of hot water.

5/22/2009 8:28:06 PM

Quote :

"per year and the hot water heater uses 4773"

you forget that unless you have your hot water tap wide open you will not have your hot water heater on full power.

Kinda like how people ask "well golly gee how come it does not take much power/gasoline for my car to just cruise 70mph but i blow fuel away in stop and go traffic. All while neglecting the cars momentum and current velocity into the equation.

5/22/2009 11:31:45 PM

Water heaters do cycle between intervals of full on and full off with one or more seperate heating elements, quite unlike a throttled internal combusion engine which is continuously variable over a range of power outputs.

He said he's quoting the box or website of the appliance -- I am pretty sure the the person putting the "estimated yearly electricity use" on the box isn't assuming a continuous flow of ice-cold well water. I'd even go so far as to hypothesize there are EPA regulations or something that dictate the conditions used for the estimate.

5/23/2009 1:48:18 AM

Quote :

"COP of the water heater is 1, fridge should be about 13"

I think you're confusing COP and SEER.

5/23/2009 2:01:12 PM

^^^[NO]

5/23/2009 5:04:19 PM

^^ indeed, i was trying to make it simple, i mean hell i didnt mention the watts of power vs. btu's either, watts dont measure internal enthalpy change, figured the tard wouldnt understand any of it anyway

5/23/2009 5:44:21 PM