WikiSysop at 03:46, 18 June 2011

2011-06-18T03:46:06Z

WikiSysop: Created page with "'''The Winiarski Rocket Stove (Estufa Rocky)''' One pound of dry wood releases about 8,600 btu's of energy when burned. Gasoline is only about twice as concentrated. It took a l..."

2011-06-14T16:41:56Z

Created page with "'''The Winiarski Rocket Stove (Estufa Rocky)''' One pound of dry wood releases about 8,600 btu's of energy when burned. Gasoline is only about twice as concentrated. It took a l..."

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'''The Winiarski Rocket Stove
(Estufa Rocky)'''

One pound of dry wood releases about
8,600 btu's of energy when burned. Gasoline
is only about twice as concentrated. It took a
long time for the tree to grow. The daily
amount of sunlight was captured and
changed into chemical energy.

In fact, trees are very much like batteries, storing energy.
Wood is like a battery that has been storing
energy for decades. The energy is concentrated
and ready for use at any rate, depending
on need. Also, this "battery" does not lose
its charge while sitting, cannot spill acid on
your pants, and usually smells good!

Burning wood or any biomass also has a
great advantage over burning petroleum
products. Trees absorb carbon dioxide while
growing and release the same amount when
burned. The tree reduces the amount of C02
in the atmosphere and then replaces it. Burning
fossil fuels, made from plants millions of
years old, can only increase the amount of
atmospheric C02, since absorption done by
the plants happened so long ago. Burning
biomass does not increase the amount of C02
in the atmosphere in the same way that burning
petroleum can.

The 54" in diameter conical concentrator
focuses about 10 square feet of sunlight at the
pot. Each square foot of earth receives between
200 to 300 btu's per hour on a sunny
day. So, the conical cooker delivers about two
to three thousand btu's per hour to the pot.
That's approximately equal to the amount of
energy that's held in a small bit of2 by 4
lumber only four inches long! The wood is
very concentrated and we can burn it as
quickly as we want.
Direct solar energy is available at a fixed rate and can disappear
behind clouds. If you've got it, wood is a
powerful, convenient source of fuel.
By using wood efficiently, people can cook
food using branches and twigs instead of split
logs. Gathering fallen branches can bring
people firewood without killing the trees, if
the rate of use matches the resource. The
branches are already a handy size so people
can be spared the labor of splitting logs as
well. The trees continue to grow while people
cook with wood.

Dr. Larry Winiarski's low mass Rocket stove
has proven itself to be the most efficient
cooking stove that we have used so far. It is
far more efficient than high mass cooking
stoves like the Lorena. We use Rocket type
stoves now to cook, bake, heat water, warm
houses, etc.

The Rocket stoves are based on an ingenious
combination of principles:
The combustion chamber is insulated in
order to keep the fire hot (above 1,100 F.) to
burn the wood more completely, reducing
smoke which is uncombusted fuel.

The cooking stoves are low mass, robbing
less heat from the pot.
An insulated chimney creates a very strong
draft which helps the wood to burn fiercely. It
also makes the stove easier to light and to us;c.
An insulated chimney has significantly more
draft than an uninsulated chimney.
The wood is burned at the tips and is
shoved in towards the fire which controls the
rate of burn, reducing smoke.
The air/fuel mixture is regulated. A small
opening is provided for incoming air. Too
much air just cools the fire.

The incoming air is preheated, especially in
a downdraft stove, which helps to keep the
fire above 1,100 F. for complete combustion.
A skirt surrounds the pot on all sides. A
small gap between the skirt and the pot allows
hot flue gases to rise up near the pot,
greatly increasing heat transfer.

The flame hits the sides of the pot as well as the bottom.
An insulated skirt reduces heat loss.
Since the stove operates at very high temperatures,
there is almost no smoke and it is
possible to cook directly on top of the chimney.
The flame, in contact with the pot, assures
efficient heat transfer.

The "Guatamalan" Rocket stove is made up
of six parts. Two of them are cut out of any
five gallon metal container. This makes the
external body of the stove. We've used soy
sauce containers, paint buckets, etc. A short
chimney (10"-12" is optimal) is made, in this
example, from stove pipe. It's also possible to
make the chimney from tin cans or more
sturdy scrap metal. (A longer chimney will
smoke less and may be preferable for that
reason.)

Rocket Stove Plans: [[File:39346203-How-to-Build-A-Rocket-Stove-DIY-AT-HOME_(1).pdf‎ ]]

[[Category:Energy]]
[[Category:Mechanical]]
[[Category:Food Preservation]]
[[Category:Water Purification]]

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Winiarski Rocket Stove - Revision history

WikiSysop at 03:46, 18 June 2011

WikiSysop: Created page with "'''The Winiarski Rocket Stove (Estufa Rocky)''' One pound of dry wood releases about 8,600 btu's of energy when burned. Gasoline is only about twice as concentrated. It took a l..."