Testing of the Sampanda stove in Cambodia 12.07.2010

**I am looking to get some Anila stove units in India for some small-scale trials http://biocharinnovation.wordpress.com/ - if you can help please get in touch asap with sarah.carter [at] ed.ac.uk**

Testing of the Sampanda stove in Cambodia 12.07.2010
Sarah Carter, UK Biochar Research Centre

See http://www.bioenergylists.org/content/testing-andersons-tl for a similar test on Anderson's TLUD, and http://www.bioenergylists.org/content/testing-everythingni for testing of EverythingNice stove, and Anila stove http://www.bioenergylists.org/content/testing-anila-stove.

Stove: Sampanda stove. Produced by the [Samuchit Enviro Tech Pvt Ltd](http://www.samuchit.com/) in India.
Test: A water boiling test (time to boil 2.5 litres of water, in a pan without a lid)
Location: The Iron Workshop, Siem Reap. A well ventilated building – 2 surrounding walls, and a roof. Wind conditions were low, but blustery at times.

Test 1: Cold start
Feedstock: 1000g dry wood pieces, 5-10cm length, 1-2cm diameter. This filled about 1/3 of the inner chamber.
Ignition: Small amount of resin.
Water boiling: Pan on stove for 17 minutes until boil (from 28oC start). 100g water was lost.
Burn: Once the pan boiled, wood residue (which included unburned wood and char) was weighed, as per the Water Boiling Test, and 300g was used to boil the water.
Biochar production: A significant amount of wood residue in the stove, actual biochar not calculated.

Test 2: Hot start (the stove was not allowed to cool down before the next test began).
Feedstock: 1200g dry wood pieces, 5-10cm length, 1-2cm diameter. This filled inner chamber about 1/3.
Ignition: Small amount of resin.
Water boiling: Pot on for 21 minutes until boil and rolling boil at 100oC. The simmer test was attempted, but not enough wood put in to maintain temperature
Burn: After 29 minutes stove emptied.
Biochar production: 100g of biochar.

Test 3: Hot start (as test 2)
Feedstock: 1000g dry wood pieces, 5-10cm length, 1-2cm diameter to begin with, then 400g was added to attempt the simmer test again.
Ignition: Small amount of resin.
Water boiling: Time to boil 19 minutes, then rolling boil. End volume of water 4.2 litres (5 litres at start).
Burn: Strong flame throughout burn, total 36 minutes, excluding 5 minutes when stove went out at the beginning
Biochar production: 300g of biochar.

Comments:
The stove design was easy to operate, but for the simmer test (if it should be discarded if the temperature goes below 96oC), then this is potentially tricky for more temperamental stove designs. More work will be done on perfecting the Water Boiling Test… any helpful hints are welcome on how to undertake the full test.

Sarah carter
UK Biochar Research Centre http://www.biochar.org.uk/
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