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Associate

Join Date: Dec 2008
Location: Veracruz, Mexico
Posts: 41

Exhaust the hot Air from Furnace

10/24/2009 5:37 PM

Hola Todos... I have a project to heat some "bricks" and need to "move" the hot air from one chamber to another until the hot Air can be exhaust... Can anybody help me with some name's supplier or library... I will be very appreciatefull... Thanks for advance

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Guru
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Join Date: May 2009
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#1

Re: Exhaust the hot Air from Furnace

10/24/2009 5:50 PM

Can you furnish more detail? What temperature is the air you need to move? Do you know yet how much flow you need? The fan and its bearings may need to withstand high temperature. One way to do this is to extend the fan drive shaft outside the hot space, with the bearings and motor located in a cool place. I think this project will be feasible, but we need more information: size of chamber(s); number, size, weight, and arrangement of bricks therein; desired temperatures and length of time to be maintained at those temperatures, etc. Good luck with this.

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Guru

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#2
In reply to #1

Re: Exhaust the hot Air from Furnace

10/24/2009 7:56 PM

The shaft supporting the fan should not be extended without check of its critical speed, it has to work far from any possible resonance, the longer the shaft the lower the resonances are.

If it is necessary bearings can be cooled either by air or by a fluid circuit and thus stay at acceptable temperatures.

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Associate

Join Date: Dec 2008
Location: Veracruz, Mexico
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#3
In reply to #1

Re: Exhaust the hot Air from Furnace

10/24/2009 11:13 PM

During the heating of the first's chamber bricks, there is heat that I would like to "move" to the next chamber... so I think that have to to be some "eexhausting" machine that can "pull" the remaining air to the next chamber.... like in a tunnel

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Guru

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#4
In reply to #3

Re: Exhaust the hot Air from Furnace

10/25/2009 11:13 PM

Are you firing (making) the bricks in the first chamber, or are the bricks the lining of the chamber?

Is this an existing device, or one yet to be built? If you can place the second chamber above the first, then all you would have to do is open a sliding 'door', and the hot air would move into the second chamber by convection.

¡Más detailles, por favor! Si le cuesta traducir al inglés, puede ud. responder en español.

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Anonymous Poster
#5

Re: Exhaust the hot Air from Furnace

10/26/2009 1:02 AM

I do not have any idea or information how to generate the hot air~!!!

My reply is only applicable with the condition that you will generate the hot air by firing.

First of all, if you want to dry out the wet brick to make dried brick, provided that your brick will not chemically react with carbon dioxide nor H2O and exhaust condition is atmosphere, you do not need hot air. Just flue gas from burner will be enough.

If you want move hot air or flue gas (or whatever), there are many types of fans that can delivery hot gaseous fluid to a sufficient pressure that can exhaust from your system.

There are not too much special since only high temperature is the main point to take into consideration.

Just contact the nearest agent or supplier for fan. They will give you the right answer to your problem

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Anonymous Poster
#6

Re: Exhaust the hot Air from Furnace

10/26/2009 1:04 AM

you can do it yourself with a an off delay timer and an exhaust fan that meets the required CFM and exhaust your hot air where ever you want, you need to know whats the exhaust temperature and quantity of exhaust and ducting to meet the exhaust parameters.

crm

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Power-User

Join Date: Mar 2009
Location: Northeast corner of the sphere
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#7

Re: Exhaust the hot Air from Furnace

10/26/2009 7:34 PM

marketing@howden.com Contact these folks. Their founder invented what you need.

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Anonymous Poster
#8
In reply to #7

Re: Exhaust the hot Air from Furnace

10/27/2009 2:56 AM

Put the fan upstream of the furnace. Push the air into the first chamber which will move it to the sceond chamber. The only time the fan will encounter heat will be when the furnace is off and heat soak may come into play. However a 2 speed fan could be set to a 'slow' speed to prevent this and would require either a timer or thermostat to shut it down when the furnace has colled enough.

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