[Stoves] Another high performance stove located

[Crispin Pemberton-Pigott]

Dear Friends of Clean Burning

 

I managed to test the small TLUD stove I obtained from Yogyakarta today for nearly three hours. It held 780 g of pellets and ignition material. They are wood pellets I got from Alex at the Stove Testing Camp so I presume they are pine – not sure. Alex…?

 

Here is the mass burn rate and power:

 



The stove either had not been assembled correctly, or because of vibration travelling 50,000 km by air, the central metal tube had rotated with respect to the air controller. There was no primary air getting into the fuel at all except via internal leakage.  When the stove was demonstrated at the GIZ office in Accra last Saturday, it was in fact on “Low”. This misalignment was not visible from outside the stove, even looking under the bottom of the fuel canister. Only when taking it to pieces could it be seen that the alignment required correction.

 

On the chart above can be seen the mass loss line in black. The High zones have a different slope compared with the Low zone in the middle. The power curve (which is smoothed) shows there is only a small difference in power.

 

The fire started at High, turned it down to Low, then back up again after an hour. The total burn time was about 155 minutes. When it flamed out I left it for a while then dumped out the charcoal which looked like shrunken pellets. There was very little smoke from the char which when spread out, quickly extinguished. The char yield was 28% of the dry fuel mass.

 

Here is a picture of the data stream:



It was a bit windy so the scale was shaking around but the fuel burned line (red) marches steadily up. Ignore the blue line. The green line is the 10 second burn rate detected by the scale, from -3 to +3 g.

 

Here is the stove:



The plate with holes in it is a substitute for a pot, retaining the flame inside the chamber in spite of the wind. It has no effect on the mass burn rate. The lever under the handle controls the air supply which splits into primary and secondary after the regulator.  Paul Anderson reports the inside air paths are unconventional. It contains several ceramic components.

 

Regards

Crispin

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20151115/820f527e/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 30396 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20151115/820f527e/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image006.jpg
Type: image/jpeg
Size: 17496 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20151115/820f527e/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image007.png
Type: image/png
Size: 126580 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20151115/820f527e/attachment.png>