Testing of the Anila stove in Cambodia 03.05.2010
Sarah Carter and Vichida Tan, 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.

**Stove**: Anila stove. Produced by the Iron Workshop, Siem Reap, Cambodia (http://www.theironworkshop.org/).
**Test**: A water boiling test (time to boil 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**: 400g dry small sticks varying sizes between 5mm and 1.5cm diameter and 2cm and 10cm length. This filled up the inner chamber to 2cm from the top.
**Ignition**: Small amount of resin.
**Water boiling**: Pan on stove for 19 minutes, it reached 97oC but failed to boil.
**Burn**: Total 23 minutes, went out briefly, but once pan was taken off, it reignited by itself.
**Biochar production**: 600g of rice straw, resulted in 100g of biochar. Almost no wood residue in the stove.

**Test 2**: Hot start (the stove was not allowed to cool down before the next test began).
**Feedstock**: 1200g dry wood pieces, 5-15cm length, 2-4cm diameter. This filled up the inner chamber.
**Ignition**: Small amount of resin.
**Water boiling**: Pot on for 25mins, 15 minutes until boil and rolling boil at 100oC for 10 minutes.
**Burn**: 29 minutes total burn.
**Biochar production**: 600g of rice straw, resulted in 100g of biochar. Almost no wood residue in the stove.

**Test 3**: Hot start (as test 2)
**Feedstock**: 1000g dry wood pieces, 5-10cm length, 2cm diameter. This filled up the inner chamber about half full. Three stones (500g) were added.
**Ignition**: Small amount of resin.
**Water boiling**: Time to boil 12 minutes, then rolling boil. End volume of water 4.2 litres (5 litres at start).
**Burn**: Strong flame throughout burn.
**Biochar production**: 600g of rice straw, resulted in 100g of biochar. Almost no wood residue in the stove.

**Test 4**: Hot start (as test 2)
**Feedstock**: 600g dry small sticks varying sizes between 5mm and 1.5cm diameter and 2cm and 10cm length. This filled up the inner chamber.
**Ignition**: Small amount of resin.
**Water boiling**: Pot on for 22 minutes, after 19 minutes, had reached 99oC, but failed to boil. Loss of 0.2litres of water (from 5 litres),
**Burn**: 29 minutes. Flame went out a couple of times (very smoky), but once relit – easily with a lighter, the flame was very strong.
**Biochar production**: 600g of rice straw, resulted in approximately 125g of biochar. Almost no wood residue in the stove.

**Comments**:
The stove design we have has a removable lid, which makes emptying and filling easy, but the join was not that tight, so the lid design will be slightly adapted by the iron workers. This will stop smoke being produced from the production of the biochar in the outer chamber of the stove.
When emptying sometimes the straw biochar caught on fire. It is easily put out by beating with a small stick, but makes emptying slightly hazardous. Leaving the stove to cool first would prevent this from being a problem.

Sarah carter
UK Biochar Research Centre
http://biocharinnovation.wordpress.com Calzado Nike