Now that's some wind!

Re: Now that's some wind!

PostBy: LsFarm On: Sat Dec 22, 2012 11:55 am

But Fred, there are reasons why your stove and MPD work:

Your Hitzer has the thermostatic temperature controling combustion air flaper.. it regulates stove temp, regardless of High draft,

Your Chimney must draft very consistantly

And most important, the stove and MPD are scared to death that if they don't behave you will use them for target practice with a 30-30 or
a 12 gauge. :shock: :lol:

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: Now that's some wind!

PostBy: lsayre On: Sat Dec 22, 2012 12:27 pm

Boots wrote:Not that i want in on the "argument" but i have not seen this posted yet,

the effect of wind blowing across the top of something (be it a straw with liquid, or a chimney with smoke we will call it a "tube" because i want to call it that.) and causing a draft is called the "venturi effect" by blowing across the top of the "tube" it creates an area of low pressure inside of the tube. And this low pressure area will be filled by whatever's on the other end of the tube. If you own any piece of equipment with a small engine, think lawn mower, the carburetor more than likely operates with the venturi effect. the more CFM of air that passes through the throat of the carb, the more fuel that gets pulled from the bowl and consumed by the engine. when you set the throttle on a small engine all you are controlling is a valve, just like a MPD. and depending on the positioning of this valve to allow more or less air flow, you get higher or lower RPM' s.

Now that being said, I did not post that in an effort to appose Stings science. I understand his point, i think. You cant get blood from a turnip. if there is not enough air in the boiler room having a second barro will do nothing but make a$50 bill disappear.


Actually wind blowing across the top of a chimney resulting in increased draft is an example of the Bernoulli Effect or Bernoulli Principle. Bernoulli preceded Venturi by about 40 years, and Venturi merely discovered that flow through a constriction causes an area of decreased pressure at the point of the constriction. What Venturi discovered was therefore merely a subset of the Bernoulli Principle, and is not applicable to chimneys unless they are at some point within their length constricted.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Now that's some wind!

PostBy: KLook On: Sat Dec 22, 2012 12:30 pm

unless they are at some point within their length constricted.


MPD

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: Now that's some wind!

PostBy: Boots On: Sat Dec 22, 2012 3:26 pm

lsayre wrote:
Actually wind blowing across the top of a chimney resulting in increased draft is an example of the Bernoulli Effect or Bernoulli Principle. Bernoulli preceded Venturi by about 40 years, and Venturi merely discovered that flow through a constriction causes an area of decreased pressure at the point of the constriction. What Venturi discovered was therefore merely a subset of the Bernoulli Principle, and is not applicable to chimneys unless they are at some point within their length constricted.


well, i stand corrected. i did not know that, I' ll have to do some research on that.
Boots
 
Stoker Coal Boiler: KA-6 In the basement........
Hand Fed Coal Boiler: Burnham SFB 101

Re: Now that's some wind!

PostBy: Lightning On: Sun Jan 20, 2013 12:40 pm

Heavy winds here over the last 24 hours. My baro doin the best it can but its still hitting a .06 - .07" WC with the hard gales. I've been experimenting with using a combination of the MPD with the baro to keep it around a .03" WC.. Seems to work really good :D ..... Any one else try a combo of the two to controll the wind gust spiking?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Now that's some wind!

PostBy: Rob R. On: Sun Jan 20, 2013 12:41 pm

I just carried out a full tub of ashes and it was half empty by the time I got to the pile. :shock:
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Now that's some wind!

PostBy: lsayre On: Sun Jan 20, 2013 12:45 pm

I saw 0.16" on my manometer with the baro damper open late yesterday. That's the highest I've ever seen it go. I held a piece of paper up near the the damper and if I would have let go it would have been sucked in and right up and out the chimney.

I wonder what the manometer would have hit if I did not have the damper?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Now that's some wind!

PostBy: Rob R. On: Sun Jan 20, 2013 1:14 pm

Larry, try opening a window in the boiler area and see if you still get draft spikes.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Now that's some wind!

PostBy: Lightning On: Sun Jan 20, 2013 1:27 pm

Rob R. wrote:I just carried out a full tub of ashes and it was half empty by the time I got to the pile. :shock:

:lol: ...... I hope you were up wind!
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Now that's some wind!

PostBy: lsayre On: Sun Jan 20, 2013 1:42 pm

Rob R. wrote:Larry, try opening a window in the boiler area and see if you still get draft spikes.


Rob, the next time I see such wind I will try this and report what I discover.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Now that's some wind!

PostBy: samhill On: Sun Jan 20, 2013 1:53 pm

It's all fun & games until someone chocks on a ping pong ball or inhales styro pellets into their lungs, my God stop this before someone gets seriously hurt & someone else sued. :nono: :nana:
samhill
 
Hot Air Coal Stoker Furnace: keystoker 160
Hand Fed Coal Stove: hitzer 75 in garage
Stove/Furnace Make: keystoker/hitzer
Stove/Furnace Model: koker 160/ hitzer 75

Re: Now that's some wind!

PostBy: Rob R. On: Sun Jan 20, 2013 1:57 pm

Lightning wrote:
Rob R. wrote:I just carried out a full tub of ashes and it was half empty by the time I got to the pile. :shock:

:lol: ...... I hope you were up wind!


I tried turning every which way, but I still ended up a hazy shade of grey. :D
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Now that's some wind!

PostBy: hcarlow On: Mon Jan 21, 2013 2:23 pm

Rob R. wrote:I just carried out a full tub of ashes and it was half empty by the time I got to the pile. :shock:



Good reason to have that second ash pan or tub so you can wait for the wind to drop .
hcarlow
 
Stoker Coal Boiler: Leisure Line WL 110

Re: Now that's some wind!

PostBy: Rob R. On: Mon Jan 21, 2013 2:42 pm

hcarlow wrote:
Rob R. wrote:I just carried out a full tub of ashes and it was half empty by the time I got to the pile. :shock:



Good reason to have that second ash pan or tub so you can wait for the wind to drop .


Can you believe that I have all of these tubs and I waited until a windy day to empty them? :what: :oops: No time during the week to mess with it, and something came up on Saturday...so Sunday I was on my last tub and something had to done. (I only emptied two of them, the rest can wait until tonight)

Image
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Now that's some wind!

PostBy: dcrane On: Mon Jan 21, 2013 3:40 pm

Lightning wrote:Heavy winds here over the last 24 hours. My baro doin the best it can but its still hitting a .06 - .07" WC with the hard gales. I've been experimenting with using a combination of the MPD with the baro to keep it around a .03" WC.. Seems to work really good :D ..... Any one else try a combo of the two to controll the wind gust spiking?


Im with Ya Bro! Winds have been rippin' mad around here for 2 days now and snow is on the way... combo baro/mpd bearly handles the pull! :cry:
dcrane
 
Hand Fed Coal Stove: Crane 404

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