| Author |
why waste the heat?
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| Nomen Nescio 2006-12-10, 5:25 pm |
| why do factories let heat go up the chimney? can't they use it to bake
bread by having the dough slowly turn inside the chimney and pop out a
door when it's cooked? you might need to wrap the dough up so it doesn't
absorb the smoke, but it would still be heated nicely.
Maybe they could warm water too.
What do you think?
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| Nomen Nescio wrote:
> why do factories let heat go up the chimney? can't they use it to bake
> bread by having the dough slowly turn inside the chimney and pop out a
> door when it's cooked? you might need to wrap the dough up so it doesn't
> absorb the smoke, but it would still be heated nicely.
>
> Maybe they could warm water too.
>
> What do you think?
>
Chimneys are disposal devices. They need a temperature difference to
operate. Rob them of heat and they won't work properly.
--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.
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| daestrom 2006-12-10, 8:25 pm |
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"Nomen Nescio" <nobody@dizum.com> wrote in message
news:2dc430922486abb049a2de9cf5072876@dizum.com...
> why do factories let heat go up the chimney? can't they use it to bake
> bread by having the dough slowly turn inside the chimney and pop out a
> door when it's cooked? you might need to wrap the dough up so it doesn't
> absorb the smoke, but it would still be heated nicely.
>
> Maybe they could warm water too.
>
> What do you think?
>
Well, as another mentioned, a temperature difference is often used to create
the draft. But if other industries are anything like the thermal power
plant industry, a great deal of the heat in the chimney *is* used. In power
plants it isn't used to bake bread, but it is used to pre-heat incoming air
for the furnace/boiler, and pre-heat the water that is injected into the
boiler.
The 'smoke' from many chimneys is mostly water vapor and CO2. The water
vapor condenses at the outlet forming a miniature cloud. That's what makes
it visible. Yes, there are also other compounds that are less desirable,
like SO2 and NOx.
One problem is that the cost of heating an oven to a modest cooking
temperature is so easy/cheap to do with a separate fuel source, that the
money saved using 'chimney heat' isn't really worth it.
daestrom
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"Nomen Nescio" <nobody@dizum.com> wrote in message
news:2dc430922486abb049a2de9cf5072876@dizum.com...
> why do factories let heat go up the chimney? can't they use it to bake
> bread by having the dough slowly turn inside the chimney and pop out a
> door when it's cooked? you might need to wrap the dough up so it doesn't
> absorb the smoke, but it would still be heated nicely.
>
> Maybe they could warm water too.
>
> What do you think?
mmm bread
Jack
>
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| samuel chamberlain 2006-12-11, 9:25 am |
| CJT wrote:
> Nomen Nescio wrote:
>
> Chimneys are disposal devices. They need a temperature difference to
> operate. Rob them of heat and they won't work properly.
>
true but then that is what fan flues are for .
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| homeboy465 2006-12-11, 9:25 am |
|
"CJT" <abujlehc@prodigy.net> wrote in message
news:457C9560.5060309@prodigy.net...
> Nomen Nescio wrote:
>
> Chimneys are disposal devices. They need a temperature difference to
> operate. Rob them of heat and they won't work properly.
>
> --
but it would make sense that this difference could be used you could use the
heat to then generate pomer of their own and also using in this manner you
could collect and find other ways to use the emmitions instead of letting
them distroy the envirlment there has to be a way of using them instead of
just letting them go to waist and do damage.
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| In article <457d3cdc$1_1@mk-nntp-2.news.uk.tiscali.com>,
samuel chamberlain <samuel.79@tiscali.co.uk> wrote:
> CJT wrote:
> true but then that is what fan flues are for .
EXCEPT, if you rob all the heat from the chimney, to make power, and
replace it with a Flue Fan, will the Robbed Heat make enough power, to
run the Flue Fan, and supply some extra for other uses?????????
NOT likely........
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| nicksanspam@ece.villanova.edu 2006-12-11, 5:25 pm |
| You <You@shadow.orgs> wrote:
>... if you rob all the heat from the chimney, to make power, and
>replace it with a Flue Fan, will the Robbed Heat make enough power,
>to run the Flue Fan
The "robbed heat" might be a hundred times more than the fan power,
eg 10cfmx500F/3.412 = 1465 watts, vs a 15 watt fan.
Nick
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| Steve Cothran 2006-12-11, 5:25 pm |
| On Sun, 10 Dec 2006 20:15:02 -0600, "Jack" <Joe@nowhere.com> wrote:
>mmm bread
>
>
Yeah, baked in the waste heat of the local creamatorium. Yum.
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| daestrom 2006-12-11, 5:25 pm |
|
"You" <You@shadow.orgs> wrote in message
news:You-F9B026.11530411122006@netnews.worldnet.att.net...
> In article <457d3cdc$1_1@mk-nntp-2.news.uk.tiscali.com>,
> samuel chamberlain <samuel.79@tiscali.co.uk> wrote:
>
>
> EXCEPT, if you rob all the heat from the chimney, to make power, and
> replace it with a Flue Fan, will the Robbed Heat make enough power, to
> run the Flue Fan, and supply some extra for other uses?????????
>
A good point. But some furnaces already have a 'flue fan', so then it makes
sense to recover as much heat as practical.
But depending on the flue gasses, cooling too far can lead to other
headaches. Condensate can have acids in it that eat away at the chimney;
tars or creosotes can collect, requiring frequent cleaning.
This is a sort of 'case-by-case' kind of problem. Not one-size-fits-all.
daestrom
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| samuel chamberlain 2006-12-12, 9:25 am |
| daestrom wrote:
>
> "You" <You@shadow.orgs> wrote in message
> news:You-F9B026.11530411122006@netnews.worldnet.att.net...
>
> A good point. But some furnaces already have a 'flue fan', so then it
> makes sense to recover as much heat as practical.
>
> But depending on the flue gasses, cooling too far can lead to other
> headaches. Condensate can have acids in it that eat away at the
> chimney; tars or creosotes can collect, requiring frequent cleaning.
>
> This is a sort of 'case-by-case' kind of problem. Not one-size-fits-all.
>
> daestrom
>
for ng/lpg condensing boilers the heat exchangers have to be made from
ss and the condensate drain to the sewer needs to be made in plastic
pipe (upvc/abs/pp) of cause once it has mixed with other effluent it is
highly dilute .
as for flue gases that contain lots of tar (solid fuel) these can be
reburnt before exiting the appliance .
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| samuel chamberlain 2006-12-12, 9:25 am |
| Steve Cothran wrote:
> On Sun, 10 Dec 2006 20:15:02 -0600, "Jack" <Joe@nowhere.com> wrote:
>
>
>
> Yeah, baked in the waste heat of the local creamatorium. Yum.
prob the q you ort to be asking is should we be useing creamatorium at
all from an enviromental view point ? I dont know the answer to this q .
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"samuel chamberlain" <samuel.79@tiscali.co.uk> wrote in message
news:457e9ead$1_3@mk-nntp-2.news.uk.tiscali.com...
> Steve Cothran wrote:
> prob the q you ort to be asking is should we be useing creamatorium at all
> from an enviromental view point ? I dont know the answer to this q .
I would say yes we should so long as they are fired with biofuels. The body
itself is carbon neutral.
Jack
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| Solar Flare 2006-12-12, 9:25 am |
| "Smoke Stack Loaf"
People are dying to make our new bread.
"Jack" <Joe@nowhere.com> wrote in message
news:rN6dnWDpI9ZCNePYnZ2dnUVZ_ragnZ2d@tbaytel.net...
>
> "samuel chamberlain" <samuel.79@tiscali.co.uk> wrote in message
> news:457e9ead$1_3@mk-nntp-2.news.uk.tiscali.com...
>
> I would say yes we should so long as they are fired with biofuels.
> The body itself is carbon neutral.
>
> Jack
>
>
>
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| Anthony Matonak 2006-12-12, 9:25 am |
| Jack wrote:
> "samuel chamberlain" <samuel.79@tiscali.co.uk> wrote in message
>
>
> I would say yes we should so long as they are fired with biofuels. The body
> itself is carbon neutral.
This would be an interesting application for solar. A sufficiently
large concentrating reflector should be able to incinerate a body
without the use of any fuel whatever.
Anthony
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"Anthony Matonak" <anthonym40@nothing.like.socal.rr.com> wrote in message
news:6mzfh.67935$si3.66360@tornado.socal.rr.com...
> Jack wrote:
>
> This would be an interesting application for solar. A sufficiently
> large concentrating reflector should be able to incinerate a body
> without the use of any fuel whatever.
>
> Anthony
now you're thinking outside of the 'box'
Jack
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| Solar Flare 2006-12-12, 5:25 pm |
| If you had shade for a week the body would begin to rot and smell.
"Anthony Matonak" <anthonym40@nothing.like.socal.rr.com> wrote in
message news:6mzfh.67935$si3.66360@tornado.socal.rr.com...
> Jack wrote:
>
> This would be an interesting application for solar. A sufficiently
> large concentrating reflector should be able to incinerate a body
> without the use of any fuel whatever.
>
> Anthony
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