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More new biochar ideas from The Warm Heart team part 2

More new biochar ideas from The Warm Heart team part 2. See the first post in this series http://biocharproject.org/charmasters-log/new-biochar-ideas/

E, Dolph, aloha kaua-


Here is the material for the second half of the post. Hope it is helpful for your readers.


More new biochar ideas 16-stoking-the-xlt1k-with-long-bamboo-800

Photo 16) Stoking the WH XLT1k with long bamboo. The XLT is a 1 m3 LLU trough. Its length (4.7m) was specifically designed for bamboo feedstock to minimize the time, effort, and expense of cutting. The same calculus should hold for pole pine and coppiced wood. Note the placement of the 3 long handles on the side, thus allowing for up to a 12 person carry for heavy loads.


More new biochar ideas 17-xlt1k-long-view-w-fire-in-the-box-800

Photo 17) XLT1k –  long view with fire in the box. Note the detail of the long handles

More new biochar ideas 18-xlt1k-w-load-of-bamboo-char-800

Photo 18) XLT1k with a load of bamboo char

More new biochar ideas 19-xlt1k-inverted-unit-w-long-bamboo-800

Photo 19) XLT1k – The unit is inverted. Note the diagonal bracing.

More new biochar ideas 20-fruit-tree-trimming-feedstock-used-in-21-800

Photo 20) Fruit tree trimming feedstock used in the burn in photo 21

More new biochar ideas 21-t200-with-char-from-20-800

Photo 21) T200 oven.

More new biochar ideas. See the first post in this series

This is the original test unit for the FC Trough concept in general and sized for comparison tests with the UB JRO 200 l TLUD oven design. It showed conclusively that the two were complimentary at equivalent size. If the feedstock is of appropriate size, the ‘light and leave’ characteristic of the JRO has the advantage over the ‘light and attend’ FC units since the small scale distributed producer can attend to other matters during the burn and, aside from some simple loading principles, does not have to master stocking skills. In addition, with the right kind of feedstock, the inherent product of the JRO is more uniform and likely to be of a higher porosity. On the other hand, the FC trough has a much greater range of acceptable feedstock types without additional processing, a greater bulk char production potential for a given sized unit and the basic design is very flexible and easily sized up to handle feedstock abundance and inherent dimensionality. The basic stocking skills are not that difficult to learn with a bit of practice with the various classes and conditions of the potential feedstock.

The tree trimming char shown here in the unit resulted from the burn of the tree trimming feedstock pictured in photo 20. This unit is on indefinite loan to an up-scale hotel in Chiang Mai to process their grounds trimmings, etc. into char for recycling in their composting program, part of the local anti-smoke pollution program.

More new biochar ideas 22-generalized-schematic-of-wh-troughs-800

Photo 22) Generalized schematic of WH troughs. See table of standard dimensions and photos for added detail of particular units.

More new biochar ideas 23-cross-sectional-view-of-upper-rim-800

Photo 23) Cross-sectional view of upper rim. The spot welds are made at rough intervals of 12 to 18 cm around the rim with the series of welds of angle iron to box iron and angle iron to fire box being offset from each other.

More new biochar ideas. See the first post in this series

Standard dimensions for the 4 FC Trough units currently in the Warm Heart line:


T 200 oven

Base width                  bW ~  28 cm

Top width                   tW  ~  55 cm

Vertical height            vH  ~  27 cm

Slant height                sH  ~  30 cm

Length                        L   ~  170 cm

Volume                       V   =  190,485 cm3 ~> 200 l = 0.2 m3

Inside angle                iA  ~ 117°


T 500 oven

Base width                  bW ~  28 cm

Top width                   tW  ~  64cm

Vertical height            vH  ~  43cm

Slant height                sH  ~  47 cm

Length                        L    ~ 243 cm

Volume                       V    = 480,654 cm3 ~> 500 l = 0.5 m3

Inside angle                iA   ~ 113°


T 2k LLU

Base width                  bW ~  80 cm

Top width                   tW ~ 160 cm

Vertical height            vH ~  75 cm

Slant height                sH ~  85 cm

Length                        L   ~ 230 cm

Volume                       V  = 2,070,000 cm3 ~> 2k l = 2 m3

Inside angle                iA ~ 118°



Base width                  bW ~ 32 cm

Top width                   tW ~ 67 cm

Vertical height            vH ~ 42 cm

Slant height                sH ~ 45 cm

Length                        L    ~ 473 cm

Volume                       V    = 983,377 cm3 ~> 1k l = 1 m3

Inside angle,               iA   ~ 113°


Volume: V = (bW+(tW-bW)/2) x vH x L

Inside Angle: iA = base to slant wall

Slant height: sH = short dimension of the rectangular panels making up the long walls of the unit (see photo 22).


More new biochar ideas.

Trough angle iA [labeled A in photo 22] = Acsgnet° + 90°; where Acsgnet° is determined from http://www.csgnetwork.com/righttricalc.html using measured ‘c’ {= sH} & ‘a’ {= (tW-bW)/2}


Me ke aloha – frog, for Warm Heart, UB International & UBI Siam.


Karl J. Frogner, PhD pattamo_kop@yahoo.com

Founder & Head of Project Development, UB International

Head of Project Development, UB Siam

Biochar Specialist & Head of Development and Testing, Biochar Project

Warm Heart Foundation, Thailand  warmheartworldwide.org

See the first post in this series









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