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BrickStove with container: The Brick Stove, how it is build, how it functions, why we think this is a good idea
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The Brick Stove, how it is build, how it functions, why we think this is a good idea

  • The stove will have a table like model, thus also functional when not burning. It rests on a metal frame 30 cm above the ground and is about 1 meter high.
  • The stove is constructed out of concrete paving stones (60x40x6cm) for bottom and top.
  • In between bottom and top two walls are masoned from ordinary bricks with mortar. This mortar is a mix 1 to 1,5 from clay and sand.
  • The channels in the stove fit inside the two brick walls. Soft baked bricks and thin gauge RVS-sheet metal are used. All parts are stacked loose next to- or on top of each other. A clay-sand mix is only used as fill when parts do not have the proper size. These channels get very hot. At the hottest parts bricks can be protected with thin RVS sheet metal. Cracked or eroded brick can also be replaced, as they are only loosely stacked and well accessible.
  • The lower channel is horizontally split by thin RVS sheet metal, that gets very hot when the stove is burning. Air that streams in under this sheet metal heats up before it enters the fire box, thus contributing to a cleaner combustion.
  • The firebox is wide at the top and narrow at the bottom. This is done by placing bricks slanted against the outside walls. The space behind the slanted tiles functions as the channel to guide preheated air to the opposite side, where this air can enter between the grates of the fire box.
  • As grates of the fire box function short bits of rebar.
  • Hot gas is guided from the fire box horizontal through a channel above the inlet duct, then goes up to a channel on top of the first.
  • From there is can escape sideways into the metal ducts shaped out of a flattened oil drum. From there smoke flows out to the chimney.
  • In our first experiment we used forced draft, using an electric vent of which the speed could be regulated.
  • In coming experiments we will pump the exhaust gasses through a basin with water. The warmed-up water assists in heating the house. Further it filters the smoke, for which some chemicals can be added. The water itself is filtered in a plant bed.

    This wood burning stove is expected to function as follows:

  • A tube like container, open only at one side and filled with wood is placed in the circular opening in the top of the stove.
  • After the wood in the container is lit, fuel wood slides down from the container to the top of the grates, that is the top edge of the tiles. Burning parts falling off, slide down while burning to a smaller size. Small parts falling through, burn to ashes on a plate positioned under the fire box.
    Air is pre-heated before it reaches the fire. Preheated air flows in from both open sides of the tile grades.
    To attain a very high burning temperature the actual fire place is small. It is expected the fuel will be consumed at a slow pace. This is in contrast with a normal stone wood burning stove, that burn their fuel fast.
  • Hot gas from the fire box moves horizontal through a channel. This channel will be the hottest part of the stove. Gassified wood will burn at this spot. If necessary extra air will be let in.
  • From the first channel it can rise to a second on top of the first, to transmit its heat to the walls.
  • From there it can escape sideways into the sheet metal outside ducts. This metal sheet will get warm soon after the stove is lit. When the fire is down, the hot inside stone mass will radiate its energy through this enclosure.
  • From the wide metal duct the smoke flows out to a chimney with a minimal cross section, only large enough for the reduced airflow through the stove.

    Top picture shows scheme of position of fuel container.
    Middle picture shows ventilator in exhaust duct.
    Bottom picture shows first brick stove with messy fueling.

    More pictures at 'See it', page Brick Stove

    BrickStove with container: The Brick Stove, how it is build, how it functions, why we think this is a good idea
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