Manual pipe dampers .. how, why, when

Re: Manual pipe dampers .. how, why, when

PostBy: franco b On: Wed Jan 29, 2014 9:12 pm

I think lightning's position is that both devices act to decrease draft which I believe to be true. The baro acts automatically while the manual damper must be set and reset if draft changes and constant draft is desired.

There is however a difference in the behaviour of the flue gas when using a manual damper. Flue gas when encountering the restriction of the manual damper will tend to bunch up in front of it and then increase velocity in passing through it where it then encounters the much lower pressure of the full size pipe which causes turbulence. Turbulence both before and after the damper coupled with the slowing gas will have a baffle effect beyond just slowing the gas. This turbulence could effect the heat exchange of the stove and account for the belief that it holds the heat in.

To prove it one way or another would take some careful measurement.
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Manual pipe dampers .. how, why, when

PostBy: freetown fred On: Wed Jan 29, 2014 9:13 pm

Damn Kevin, I thought the proof was always in the pudding??? toothy
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Manual pipe dampers .. how, why, when

PostBy: KLook On: Wed Jan 29, 2014 9:29 pm

Heh heh Fred, no the proof is elusive. I like a good debate and had to much time on my hands this day. I an stuck in a catastrophe created by 1 inch of snow! Whodathunkit!!! :o Anyhoo, all in good fun. Use whatever works for you and stay safe buddy. ;)

Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

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Re: Manual pipe dampers .. how, why, when

PostBy: freetown fred On: Wed Jan 29, 2014 10:21 pm

You too Kevin, I didn't see anything about your area, but I know all this is raisin hell in the Atlanta area :(
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Manual pipe dampers .. how, why, when

PostBy: KLook On: Wed Jan 29, 2014 10:35 pm

LOL, they got 2 to 3 inches and we only got 1. But you should have seen it!!! :shock: It took me 4 hours to go about 3 miles yesterday. It is total gridlock man. I cannot put it all on the southern drivers. The conditions were brutal for anyone. Yes, I could go where I wanted when I wanted. But these are people in cars that have no business being on the road. No inspection here you know. Bald tires, bad brakes, etc. It was a circus. And to be further honest, most of these people would not have gone out in it but the weather people called for a few flurries. They went to work, got out at noon or so, and the highways were just jammed with them trying to all go in the same direction. I could have driven INTO Chattanooga in about 10 minutes. But getting out was a biaaatch.
Overall, quite the experience and one that was not necessary for many reasons.

Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

Re: Manual pipe dampers .. how, why, when

PostBy: dlj On: Wed Jan 29, 2014 10:57 pm

Lightning wrote: I wasn't referring to you.. :) But if you wanna throw stones from over there that's ok with me.. :lol: :P


Lighting - my mistake - in the words of Lily Tomlin "Never Mind" :D

dj
dlj
 
Hand Fed Coal Stove: Vermont Castings Resolute
Baseburners & Antiques: Glenwood Baseheater #6
Coal Size/Type: Stove coal
Other Heating: Oil Furnace, electric space heaters

Re: Manual pipe dampers .. how, why, when

PostBy: 22lr10xxx On: Mon Feb 24, 2014 9:23 pm

I use both i have a SS chimny that will draft any stove out of control wood or coal. My sf250 would suck so much air when it was hot it would wissle with the bero wide open. I run about 1/2 mpd bero takes care of the rest
22lr10xxx
 
Hand Fed Coal Stove: harmon sf250

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