[Stoves] Test procedures for the 6_Box System

[Frank Shields]

Greetings Stovers,


Box-1 Fuel test package

A brief description of the testing procedure:

1)Particle size distribution:

Oven dry a sample of biomass and sieve through screens: 50, 25, 16, 9.5, 
6.3, 4.0, 2.0 mm size. Sticks above that measure the length.

2)Width to length ratio:

Along the side of a board line up 20 representative particles of biomass 
and measure. Then take the same and lay next to each other and measure 
the width.

3)Volatile Matter:

In a black iron pipe pack with oven dried biomass and heat to 550 C for 
one hour. Calculate the loss in weight.

4)Fixed Matter

The material (char) left in the pipe minus the ash.

5)Ash:

Ash a sample of oven dried biomass at 550 until the ash is white.

6)Solvent extractable: (resins, gums)

Warm a dried (60 deg. C) biomass sample in a beaker containing Lignoine 
for one hour. Pour through a filter paper and collect the liquid. Place 
the solid back into the beaker and add more solvent and repeat. Slowly 
dry the solvent and weigh the residue.

7)Water extractable: (sugars, starches)

Using the above solvent extracted biomass add water and simmer for an 
hour. Filter the liquid and dry. Weigh the residue.

8)Particle Density

Determine the bulk density of quartz sand by flowing it into a container 
of known volume. Pour most out and add some biomass a little at a time 
along with some sand. Top off the container with sand. Calculate the 
sand that did not go in due to the biomass to determine the volume the 
biomass took up.

9)Bulk Density

Oven dried basis determine weight to volume.

10: Void Space for air movement

In a known volume of the combustion chamber fill with the known weight 
of biomass (calculated dry wt) and using bulk and particle density 
calculate the % voids where air will flow.

11: Salts

A saturated paste type test measuring the electrical conductivity.

The above tests can be run on all biomass fuels including dung, pellets 
and grasses, twigs. A stove is run as normal using wild biomass and 
completing a task of cooking. Monitoring the 6-Boxes on a form will 
allow us to determine problem locations and after collecting lots of 
data determine the best biomass properties for a specific stove.


Regards
Frank

Frank shields
Gabilan Laboratory
Keith Day Company, Inc.

-- 


(831) 246-0417 cell
franke at cruzio.com

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