Box Stove to Base Heater Conversion Adventure

 
ddahlgren
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Post by ddahlgren » Sat. Oct. 25, 2014 5:03 am

KingCoal wrote:right, I started turning it down and it's at 251/ 114 now at -.03. i'm going to leave it over night and see what I have in the morning.

it's going to cool off alittle sat. and sun. here so i'll try the base mode then.

thanks,
steve
You are making around 2100 BTU for every 10 sq. ft. of stove at that temp and suspect the sides cooler. To put it in perspective I have a gas stove the smallest burner that can go low enough to melt chocolate is 5000 on high and very small. think way less than half of a barn heater.


 
KingCoal
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Post by KingCoal » Sat. Oct. 25, 2014 5:45 am

you are correct, from the lower load door sill down the sides are 189 to 121 on the side of the ash pit.

with 2 windows open 3 inches at the top of the stairs it's 72 down and warmer up.

 
rberq
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Post by rberq » Sat. Oct. 25, 2014 1:56 pm

KingCoal wrote:in the original design I could run this stove at 125 stove top for long periods and not see any evidence of fire either.
i guess I need to go ahead and turn it down more.
It's scary to keep turning it down when you can see no fire. In that case, I rely mainly on the stack temperature to assure myself it is still alive -- as long as it stays stable at 90* or so, I have never had a fire go out. But I haven't had the courage to run a stack temperature lower than 90, so I guess I need to go ahead and turn it down more, too. :)

 
KingCoal
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Post by KingCoal » Sat. Oct. 25, 2014 5:20 pm

current conditions, perfect for experimenting with the base chamber because I know I will have plenty of draft and i'll be able to put it right where I want with the 2 MPD's.

http://www.wunderground.com/cgi-bin/findweather/h ... uery=46550

primaries set at 2.25, 1/16" open. stove hot spot 274, stack 95.

all dampers wide open, Mano. yoyoing from -.02 thru -.07 in the gusts.

 
KingCoal
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Post by KingCoal » Sat. Oct. 25, 2014 7:18 pm

i don't know if this thing will go any lower. I've turned it down to 2.0 on the primaries, the flap is hanging open 1/32, the wind is down to 10 mph all dampers open, the Mano. is cycling between -.01 and -.02 and it's STILL 274 / 97.

i'll see what it does over night, hope the CO detector don't wake me up :shock:

 
KingCoal
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Post by KingCoal » Sun. Oct. 26, 2014 7:16 am

well, it worked. finally.

by the time I went to bed I had 228/96 and this morning it's running real nice and steady at 218/94.

house temp. across the period has stayed at 70 even.

just shook it, threw in 4 scoops of nut and the ladies are dancing. nice.

steve

 
KingCoal
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Post by KingCoal » Mon. Oct. 27, 2014 4:23 pm

OK, I think I like this BB operation. :D

i ran about 24 hrs. on 14 #'s of coal in base mode with -.03 constant Mano.

this gave 218* stove 94* stack for the period with the primary air flap JUST hovering open. read sheet of paper width.

when I shook it to refuel this morning I was pleased to see the resulting signature talc dust ash from long SLOW BB burning.

the temp. was to hit 75 OAT today so I flipped it back to direct and left all the other settings in place as a precaution against dropping to much chimney draft.

eventually i'll have enough experience with the new set up to begin trusting it I guess.


 
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wsherrick
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Post by wsherrick » Mon. Oct. 27, 2014 4:57 pm

KingCoal wrote:OK, I think I like this BB operation. :D

i ran about 24 hrs. on 14 #'s of coal in base mode with -.03 constant Mano.

this gave 218* stove 94* stack for the period with the primary air flap JUST hovering open. read sheet of paper width.

when I shook it to refuel this morning I was pleased to see the resulting signature talc dust ash from long SLOW BB burning.

the temp. was to hit 75 OAT today so I flipped it back to direct and left all the other settings in place as a precaution against dropping to much chimney draft.

eventually i'll have enough experience with the new set up to begin trusting it I guess.
See. I wouldn't tell you something if it wasn't so. Now, you've found out on your own, excellent. Now you are operating in the true base burner range.

 
KingCoal
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Coal Size/Type: Nut Anth.
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Post by KingCoal » Mon. Oct. 27, 2014 6:03 pm

yes William, thanks.

i never doubted, just hadn't had the time and weather to make a good test burn of this portion of the stoves abilities.

we had most of the family here yesterday for my son's 30th birthday celebration. that included my 86 yr. old parents who were most interested in my latest project.

as I was explaining the operational function of the new design my Dad just lit up and told me all about his mothers mothers house when he was a boy. they had a crawford cook stove and 2 crawford BB's in the house. they were the local dry goods store owners and sold stoves. my mothers side were PA. coal miners back then.

he was very passionate about the numbers of heat values and stack temps. I was achieving, kept repeating over and over, "there isn't even body temp. going up the chimney, amazing, you can just stand here with your hand on the pipe and barely feel it against your skin !! "

it was a great day.

a further stove note : I didn't try to run the stove at less than -.04 in direct mode last yr. not knowing how far to trust it. now I know it will be perfectly happy pulling just -.03 in base mode and it showed it will make a world of diff.

thanks,
steve

 
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Sunny Boy
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Post by Sunny Boy » Tue. Oct. 28, 2014 8:17 am

To borrow an old saying,..... "You have arrived." ;)

Welcome to the wonderful world of old coal stove heat extraction technology. :D

I would have loved to hear more about your folks talking about everyday life with those Crawfords !!!!! I enjoyed hearing similar stories from my Dad about his days growing up with coal heat in Brooklyn.

Paul

 
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Photog200
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Post by Photog200 » Tue. Oct. 28, 2014 8:21 am

KingCoal wrote:yes William, thanks.

i never doubted, just hadn't had the time and weather to make a good test burn of this portion of the stoves abilities.

we had most of the family here yesterday for my son's 30th birthday celebration. that included my 86 yr. old parents who were most interested in my latest project.

as I was explaining the operational function of the new design my Dad just lit up and told me all about his mothers mothers house when he was a boy. they had a crawford cook stove and 2 crawford BB's in the house. they were the local dry goods store owners and sold stoves. my mothers side were PA. coal miners back then.

he was very passionate about the numbers of heat values and stack temps. I was achieving, kept repeating over and over, "there isn't even body temp. going up the chimney, amazing, you can just stand here with your hand on the pipe and barely feel it against your skin !! "

it was a great day.

a further stove note : I didn't try to run the stove at less than -.04 in direct mode last yr. not knowing how far to trust it. now I know it will be perfectly happy pulling just -.03 in base mode and it showed it will make a world of diff.

thanks,
steve
Thank you for that bit of Nostalgia, I love hearing about the old ways. I would ask my Dad all the time how things were done back in the day. I am sure your Dad was proud of your accomplishments on this project. I would love to be able to go back in time to see those Crawford stoves in operation!

I run both my stoves at .03 on the manometer when I take them out of direct mode. The cook stove goes into oven mode and is kind of like a BB, the flue path is taken under the oven then out the stack.

Randy

 
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Photog200
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Post by Photog200 » Tue. Oct. 28, 2014 8:23 am

Ok Paul, get out of my head! LOL.

 
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Sunny Boy
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Post by Sunny Boy » Tue. Oct. 28, 2014 8:54 am

Randy,

Great minds think alike, .... or maybe it's just a coal range owner thing ? :D

Paul

 
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Photog200
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Post by Photog200 » Tue. Oct. 28, 2014 9:07 am

Sunny Boy wrote:Randy,

Great minds think alike, .... or maybe it's just a coal range owner thing ? :D

Paul
The scary thing is we posted them at the same time too! I hit submit and got a message that someone else had just posted a message.

 
KingCoal
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Post by KingCoal » Fri. Oct. 31, 2014 2:48 pm

i've decided I should have given more consideration to a mounting solution for the original baffle plate for use when I have the hopper in and running in base mode.

now i'm going to have let the fire burn down real low so I can get the dampers and ash door open to flush gas and heat out of the combustion chamber while in direct mode so I can drill 2 holes for pins to hang the baffle with. :oops:


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