[Stoves] moving warm air

Sun Jun 17 14:35:44 CDT 2012

Dear John,

I agree with your thought of moving hot air that is very close to the 
stove.  Keep it in the duct and use one or more fans that are "in-duct" 
or "booster fans" to move the extra hot air well.

I assume you still live in Secunda, South Africa.  There"central 
heating" systems are not common.   But your solution is essentially a 
small version of one.  You could even have a second duct that brings 
cool air from the second room back to the furnace.

Are you doing any more work on your coal TLUD stove?   And could that 
also be hooked up with air ducts?

Paul

Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

On 6/17/2012 9:35 AM, John Davies wrote:
>
> Dear Martin,
>
> The stove is a Beckers 385, with 11Kw output, for 340m3 heating area. 
> It has 2 air heating ducts, which heat air with the flue gas before 
> entering the chimney.
>
> The problem is that it is in a room of 77M3 with a standard doorway 
> leading into a passage way. A fair amount of warm air circulates to 
> the rest of the house, but not enough to prevent hot air concentrating 
> in the room.
>
> Itried blowing cold air into the room at ground level, with a standard 
> room fan. This made the room more comfortable, and forced warm  air 
> into the passage way. This is not practical, and the fan mentioned 
> uses a fair amount of power.
>
> I think that the way to go is to use a fan in a duct which sucks in 
> the hot air leaving the stove.
>
> Thanking you,
>
> John Davies.
>
> It
>
> *From:*stoves-bounces at lists.bioenergylists.org 
> [mailto:stoves-bounces at lists.bioenergylists.org] *On Behalf Of *Boll, 
> Martin Dr.
> *Sent:* 15 June 2012 10:33 PM
> *To:* stoves at lists.bioenergylists.org
> *Subject:* Re: [Stoves] moving warm air
>
> Dear John,
>
> Your problem with too much heat in the room of the stove will be more 
> complex. I guess you will not solve the problem by only moving some 
> hot air to another room.
>
> I guess by my experience with a big stove, that a good amount of the 
> heat will be released by your stove in form of radiation. If it is 
> like this, I guess you have to shield the surrounding of the stove a 
> lot from the radiation of the stove, that you will not feel so 
> uncomfortable hot (as in the summer-sun) and to use the radiation to 
> warm up a medium (air or some liquid or fast material absorbing the 
> heat) and bring the radiated energy in that (captured) form into 
> another room.
>
> Example: some oil-filled radiators, which are electrically heated and 
> can be moved to another space when warmed up, to warm another room, 
> when brought there.
>
> I guess it was worth a test, to concentrate the spread radiation onto 
> a tube by a Rinnenkollektor ( I don't know the English expression: e.g 
> a Rinnenkollektor could consist of a half-pipe reflector with tube in 
> its focus-line)
>
> -you could test, it with a plastic dirty-water-tube cut into a 1/3 
> tube and lined with aluminium-foil, which concentrates the radiation 
> onto a blacked copper-tube. In this copper-tube you could measure the 
> temperature, to know if the temperature was useful for the other room.
>
> The simpler way was, to hang close to the stove some bags filled with 
> material that could absorb heat, and to remove them after being 
> heated, to cool down in the neighbour-room.
>
> In that time of heating the bags you could feel, if the felt 
> temperature in the room with the stove was agreeable. -- My idea: Hang 
> up some wet towels for a short time, to shield against the radiation. 
> So you can feel (for a short time) immediately, if the radiation makes 
> the feeling of too much heat or if it was the too high temperature of 
> the air.
>
> I know your problem, because I have a 14.5 kW high-mass stove which is 
> heating a 120 m3 room. It feels feels to hot in the room, if the stove 
> is really good fed, and gives much heat by its big surface. (5 m2)
>
> I thought about transporting hot air to a neighbour room to solve the 
> problem, but I am nearly sure, it will not solve the problem, because 
> the stove has a very big surface which radiates. If you would be 
> interested, I could give you the address of the factory in Germany, to 
> give you an impression of my stove to compare with yours.
>
> Happy to have now summer-time in Germany-; but the temperatures are 
> actually so low, that we use a little bit the space-heating-stove.
>
> Interested how you think about and deal with that problem.
>
> Have a comfortable feeling by your stove.
>
> Martin
>
> >Message: 3
>
> >Date: Fri, 8 Jun 2012 20:14:44 +0200
>
> >From: "John Davies" <jmdavies at telkomsa.net <mailto:jmdavies at telkomsa.net>>
>
> >To: "Discussion of biomass cooking stoves"
>
> > <stoves at lists.bioenergylists.org 
> <mailto:stoves at lists.bioenergylists.org>>
>
> >Subject: [Stoves] moving warm air
>
> >Message-ID: <000301cd45a2$95eba7c0$c1c2f740$@telkomsa.net 
> <mailto:000301cd45a2$95eba7c0$c1c2f740$@telkomsa.net>>
>
> >Content-Type: text/plain; charset="us-ascii"
>
> >
>
> >I have recently moved house, and have a dilemma. I have an anthracite 
> heater in one room which is uncomfortably warm. I wish to >move the 
> warm air into adjacent rooms to have a more even heating of the house. 
> There is an open doorway leading into a >passageway, but the air 
> movement is insufficient.
>
> >
>
> >
>
> >My thoughts are to bore holes through the walls the size of a computer 
> fan and mount such fans in the holes to distribute the warm >air.
>
> >
>
> >
>
> >Would this be successful ?  What wattage fan would move how much air 
> ?  Is the idea viable?
>
> >
>
> >
>
> >Your thoughts would be welcome.
>
> >John Davies,
>
> >
>
> >Experiencing the first winter chill.
>
>
>
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