| Topic: |
Science > Physics |
| User: |
"mutedHyperbole" |
| Date: |
17 Nov 2007 10:56:18 PM |
| Object: |
Using waste hot water to heat up space/water |
I read in Popular Science magazine several months (years?) ago about
an invention which captures run off water's heat from the shower and
other appliances. It uses this heat to warm up other water
supplies.
Basically, if I remember correctly, it worked like this: The used
warm water's surface area is increased and used to warm the other
waters for showering.
Why isn't this implemented yet?
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| User: "CWatters" |
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| Title: Re: Using waste hot water to heat up space/water |
18 Nov 2007 09:05:32 AM |
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"mutedHyperbole" <zutalors212@yahoo.com> wrote in message
news:e6da2bb2-5d0e-40b1-83cf-3cd84d93002e@i37g2000hsd.googlegroups.com...
I read in Popular Science magazine several months (years?) ago about
an invention which captures run off water's heat from the shower and
other appliances. It uses this heat to warm up other water
supplies.
Basically, if I remember correctly, it worked like this: The used
warm water's surface area is increased and used to warm the other
waters for showering.
Why isn't this implemented yet?
It IS being implemented.... Google for "grey water waste heat recovery"
without quotes..
http://www.watercycles.ca/
http://www.eere.energy.gov/consumer/your_home/water_heating/index.cfm/mytopic=13040
I believe it's more common in some scandanavain countries.
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| User: "mutedHyperbole" |
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| Title: Re: Using waste hot water to heat up space/water |
18 Nov 2007 09:06:01 AM |
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Alright! Amazing.
Thanks.
Why isn't this implemented yet?
It IS being implemented.... Google for "grey water waste heat recovery"
without quotes..
http://www.watercycles.ca/
http://www.eere.energy.gov/consumer/your_home/water_heating/index.cfm...
I believe it's more common in some scandanavain countries.
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| User: "" |
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| Title: Re: Using waste hot water to heat up space/water |
18 Nov 2007 02:40:33 AM |
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On Nov 18, 5:56 pm, mutedHyperbole <zutalors...@yahoo.com> wrote:
I read in Popular Science magazine several months (years?) ago about
an invention which captures run off water's heat from the shower and
other appliances. It uses this heat to warm up other water
supplies.
Basically, if I remember correctly, it worked like this: The used
warm water's surface area is increased and used to warm the other
waters for showering.
Why isn't this implemented yet?
I saw a schoolkid invent this for a science fair project a few years
ago.
Although you couldn't use it to add extra heat to a hot water pipe,
you could warm up the cold water before it goes into the shower mixer.
I think it's just practicalities. You have to have the heat exhanger
under the plughole, where there usually isn't much space. You have to
have the wastewater, potentially getting blocked, going through it, so
it needs to be accessable for maintanence. You have to have water
pipes down there too. All that installation cost might outweigh power
savings. Also if you want cold water it could be a hassle waiting for
it to cool down.
Nonetheless I'm still suprised it isn't used at least somewhat, hot
water being such a heavy electricity load.
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| User: "Sam Wormley" |
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| Title: Re: Using waste hot water to heat up space/water |
17 Nov 2007 11:47:18 PM |
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mutedHyperbole wrote:
I read in Popular Science magazine several months (years?) ago about
an invention which captures run off water's heat from the shower and
other appliances. It uses this heat to warm up other water
supplies.
Basically, if I remember correctly, it worked like this: The used
warm water's surface area is increased and used to warm the other
waters for showering.
Why isn't this implemented yet?
Thermodynamic Laws
http://scienceworld.wolfram.com/physics/ThermodynamicLaws.html
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