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Secondary Combustion Design Considerations

Post in 'Classic Wood Stove Forums (prior to approx. 1993)' started by Huntindog1, Dec 14, 2012.

  1. Huntindog1

    Huntindog1 Minister of Fire

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    Here is a Document that goes into some of the ideas of Secondary Combustion in these Non-Cat EPA Stoves. But notice its a 1984 Document so some advances have been made since then.

    Attached Files:

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  2. Corey

    Corey Minister of Fire

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    Interesting reading - thanks for posting. Though their results seem almost the exact opposite of what I would expect. In Table 1, they show the stove with uncontrolled air and no secondary combustion having the lowest emissions. Stoves with various secondary combustion and/or insulation configurations all have higher emissions ranging from almost 3x to over 7x on hydrocarbons. Table 2 shows the best emissions with the primary air 1/3 open and the secondary air completely shut. The conclusion has a sentence, "An almost universal characteristic of wood stoves at low burning rates is the abundance of excess air in the combustion products leaving the primary combustion zone." I would have thought almost the opposite...low burn rates in a smoke dragon mean an air-starved fire and smoky combustion which is cleaned up by a secondary air injection system.
  3. Huntindog1

    Huntindog1 Minister of Fire

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    Dec 6, 2011
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    1,551
    Loc:
    South Central Indiana

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