Cambodia Renewable Energy and Sustainable Agriculture for Rural Development

This page is our Gasifier Project web blog.  Most recent updates are posted at the top. 

April 18, 2005 - 

We've finished construction and ran one test run of our downdraft gasifier.  It was constructed mainly from junk yard parts.  The inner stainless sleeve is 30 cm diameter and cost us around $10.  It already had a rolled flange at one end and support cross pieces at the other.  The throat is constructed by cementing an ordinary fired clay cooking stove available in the local market for $1.  We removed the bottom cover of the cooking stove and punched a hole through the bottom so that ash could fall to the bottom of the 55 gallon drum.  The top of the drum was cut in a circle which matched the stainless sleeve.

The gas output tube was constructed in pvc because the stores were all closed for the Thai New Year holiday during our construction period.  The plan is to change to metal,  although the pvc got quite hot but held up well for the first test run.

Output gas was not ignitable.  We assume that either we have an air leak or the output gas velocity from the blower is too fast to light.  We will try to seal the unit better and use a larger output pipe for the flare.

Inner stainless 30 cm sleeve (upside down) and firebox in background.

  Some support legs clamped to bottom of inner stainless sleeve.

  Fired clay cooking stove turned upside down and hole punched in bottom to allow ash to drop.

  Top of drum is cut out to fit the inner stainless sleeve.

  Cooking stove is cemented into bottom of stainless sleeve.

  Finished gasifier with gas cooling radiator (blower not shown).

  Hand blower used with phase cut dimmer for controlled draft.

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Last modified: February 01, 2009