I'm building a new arch, and I'm wondering what constitutes (high pressure). What am I going to need for a 3x8?
I'm building a new arch, and I'm wondering what constitutes (high pressure). What am I going to need for a 3x8?
3x8 drop flue
300 taps on 3/16
Under fire air is typically low pressure, a reasonable number is less than 1" of H20. Commonly called squirrel cage blowers and they look like a drum with slanted louvers around the circumference. Low power, low pressure and high volume flow.
AOF needs a high pressure blower to get the small high speed jets of air to mix above the fire. For example, 8" of H2O pressure upstream of the nozzle will give you 80mph jets! That is the pressure I get from my B-air bounce house blower. You should design the manifold so that there is no restriction before the nozzles in order to get the high speed jets. Therefore I recommend using the nozzle size to get the right amount of air volume rather than any damper valve.
John
2x8 Smokylake drop flue with AOF/ AUF
180 taps on sacks
75 on 3/16 tubing with shurflo
Eden Prairie, Minnesota
Doop, University of Vermont Extension released a paper on this.
Combustion Efficiency for Maple Producers - University of Vermont PDFUVM.edu › ~pmrc › Combustion
That is the path to it, I was not able to insert it as a link. Lot of good information.
Matt,
Minehart Gap Maple
Second the bouncy house blower. Cheap and effective for my 2x6. It runs both the AUF and AOF. Mine goes from a 4” pipe and Y to 2x 3” pipes both with shutoff valves to control air flow.
Camp Wokanda
Peoria Park District
2023 - 210 on 3/16 shurflo, sap storage shack w/ 1100 gallon tank - 123 gallons
2022 - 210 on 3/16 shurflo, homemade vac filter & water jacket canner - 104 gallons
2021 - 215 on 3/16 shurflo, added 2nd membrane to RO - 78 gallons
2020 - 210 on 3/16 shurflo, upgraded hp pump on RO - 66 gallons
2019 - 150 on 3/16 shurflo, Deer Run 125 dolly RO - 73 gallons
2018 - 120 on 3/16 shurflo, 2x6 raised flue w/hood, homemade arch w/ AUF & AOF - 34.5 gallons
When i used aof, i used a 1hp dust collector from harbor freight. Got it on sale for under $100 at the time. Mounted it outside the sugarhouse and was connected by 4" pipe.
2008 4 buckets
~
2016 1300 vac tubing
18x24 sugar shack
2x6 Grimm Lightning w/preheater on natural gas
7" full bank press
CDL 600 RO
2000 Sonoma w/ 200gal tank
2003 Duramax w/ 500 gal tank
2 sap guzzling kids
very patient wife!
Same ol' addiction
I use a 1 hp bouncy house blower and split the air for AOF and AUF for the 2x8 arch I built. I live in Esko in case you would like to look at a set up similar to what you are planning to do before you build it.
Chad
2014: 12 taps, 5 gal buckets
2015: 15 taps on bags
2016: 150 taps: 100 on bags, 50 on 3/16" natural vac, 2x8 AUF/AOF Homebuilt Arch, 2x8 SL Drop Flu & Auto Draw, SL Propane Canner/Bottler
2017: 225 taps: Built Lean to, Added SL hood, preheater, concentric exhaust, SL SS 7" SB Filter Press
2018: 180 taps: Added Shurflo to 50 - 3/16", Auto fill sensor to head tank
2019: No tapping
2020: 175 taps
2021: 300 taps, homemade RO and releaser
2022: 600+ taps
A high pressure blower is like a vacuum cleaner motor. My AUF/AOF arch uses a squirrel cage blower for both. Mine is a little bit different because the AOF only blows back from the arch front into the fire. It works good though, I'm getting 50 gph plus from my 2x6.
IMG_20171224_101014865[1].jpgIMG_20180221_194645788[1].jpgIMG_20180301_191014383[1].jpg
Russ
"Red Roof Maples" Where the term "boiling soda" was first introduced to the maple world!
1930 Ford Model AA Doodlebug tractor
A couple of Honda 4 wheelers
Four chainsaws and no chickens!
Here is the link. The high pressure blower size is based on the width of the unit. www.uvm.edu/~pmrc/Combustion.pdf
A high pressure blower throws the air rather that how a squirrel cage blower just flings it. The link will give the details. Many have successfully used a bounce house blower with good results, but try to match the motor size to what the link suggests for best results.
High pressure is needed to create the necessary turbulence over the fire to get more complete combustion.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.
Chad, I'm pretty sure I've got it figured out, but it would be great to check out your setup and meet a fellow trader member. Not many of us in our area.
3x8 drop flue
300 taps on 3/16