Exhaust Heat

Re: Exhaust Heat

PostBy: Lightning On: Wed Jan 16, 2013 8:24 pm

titleist1 wrote:hmmmm.... I was thinking it would be higher after the baro since the baro being open adds more air to the exhaust than is present at the manometer tube before the baro. But maybe that is a volume versus pressure difference. Although if the pressure after the baro wasn't higher, then it wouldn't open. hmmmmmm......looks like I'm gonna have to try it sometime.....but I am not betting any paychecks!!

I do know that if I close the baro the manometer reading (before the baro) goes up versus when it is open!


Being the curious person that I am, I couldn't stand it and had to try this lol.. I dilled a 1/4 inch hole two feet past the baro. First I looked at the mano and saw it was precisely at a .03" WC and the baro door was open at about a 60 degree angle letting air in. Then, I moved the mano probe to the location past the baro to discover it was in fact exactly the same.. I also stuck the mano probe into where combustion air flows in under the grates, and yet again I see a .03" WC on the mano.... 8-)

So now we know the rest of the story lol
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Exhaust Heat

PostBy: dcrane On: Wed Jan 16, 2013 9:24 pm

rest of story... "I told ya so"!
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Exhaust Heat

PostBy: titleist1 On: Wed Jan 16, 2013 11:12 pm

Lightning wrote:
Being the curious person that I am, I couldn't stand it and had to try this lol.. I dilled a 1/4 inch hole two feet past the baro. First I looked at the mano and saw it was precisely at a .03" WC and the baro door was open at about a 60 degree angle letting air in. Then, I moved the mano probe to the location past the baro to discover it was in fact exactly the same.. I also stuck the mano probe into where combustion air flows in under the grates, and yet again I see a .03" WC on the mano.... 8-)

So now we know the rest of the story lol


You beat me to it...I wanted to try it but was tied up most of the day! I can't wrap my head around why it isn't higher after the baro...but it is what it is and some things I just don't need to know the reasons behind them! Glad I was on record not betting that paycheck!! :D
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

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Re: Exhaust Heat

PostBy: Rigar On: Wed Jan 16, 2013 11:17 pm

Lol...could have saved you the trouble lightning.!! :D

... it is BECAUSE of the baro that the readings ( before and after it) are identical
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Exhaust Heat

PostBy: Lightning On: Thu Jan 17, 2013 4:30 am

titleist1 wrote:I can't wrap my head around why it isn't higher after the baro...but it is what it is and some things I just don't need to know the reasons behind them!

I think its because of what you mentioned earlier about volume.. The added volume of air going thru the flue after the baro must be satisfying any pressure difference that there would be.. So you had the right idea in the beginning 8-)

Rigar wrote:Lol...could have saved you the trouble lightning.!! :D
... it is BECAUSE of the baro that the readings ( before and after it) are identical

Exactly :D

So now that I've high jacked this guys thread :oops: I hope he got out of it what he was looking for :lol:
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Exhaust Heat

PostBy: Rigar On: Thu Jan 17, 2013 6:39 am

Lightning wrote:
titleist1 wrote:I can't wrap my head around why it isn't higher after the baro...but it is what it is and some things I just don't need to know the reasons behind them!

I think its because of what you mentioned earlier about volume.. The added volume of air going thru the flue after the baro must be satisfying any pressure difference that there would be.. So you had the right idea in the beginning 8-)

Rigar wrote:Lol...could have saved you the trouble lightning.!!
... it is BECAUSE of the baro that the readings ( before and after it) are identical

Exactly

So now that I've high jacked this guys thread :oops: I hope he got out of it what he was looking for :lol:

...again...there is NO difference in pressure before and after the baro....the difference (typically) is between the combustion chamber and the "breech"... -when operating properly.
..sorry...but I have OCD..coupled with ADD...... So I need everything to be perfect...but not for very long !!.... :D :roll:
Last edited by Rigar on Thu Jan 17, 2013 7:07 am, edited 1 time in total.
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Exhaust Heat

PostBy: Rigar On: Thu Jan 17, 2013 6:49 am

And in my earlier post I stated it was BECAUSE of the baro ( that the readings were identical) .... what I should have said it is REGARDLESS of the baro....my apologies.
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Exhaust Heat

PostBy: joeq On: Thu Jan 17, 2013 7:22 pm

]
titleist1 wrote:So now that I've high jacked this guys thread :oops: I hope he got out of it what he was looking for :lol:
[/quote]

I've gotten more than I bargained for guys, and some of it's even beneficial. :) I know there's a huge thread on MPDs vs baros, and I'm sure alot of this info is there. But I'm glad you scientists had fun "bench racing", (as we call it in the hot-rod field.) Because I haven't had the opportunity to use a manometer in this application, alot of this conversation is Greek to me. But I look forward in the future experimenting, (or even implementing) with some of your ideas.
What it all comes down to is using our stoves in the most efficient manner possible, to cut down fuel costs, and increase our comfort level during mother natures "trying " times. And it's a triple win, when my girls, (and wife) are happy, and you all know where I'm going with that. :D Thanx again for the information.
joeq
 
Hand Fed Coal Stove: Surdiac Gotha 513
Stove/Furnace Make: Oil fired
Stove/Furnace Model: Thermopride

Re: Exhaust Heat

PostBy: Lightning On: Thu Jan 17, 2013 9:35 pm

joeq wrote:What it all comes down to is using our stoves in the most efficient manner possible, to cut down fuel costs, and increase our comfort level during mother natures "trying " times. And it's a triple win, when my girls, (and wife) are happy, and you all know where I'm going with that. Thanx again for the information.

Amen, partner 8-)
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

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