The wood gasifier design presented in this report has as its origin the proven technology used in World War II during actual shortages of gasoline and diesel fuel. and FEMA EMWE We’rk Unit D. APPROVED FOR .. The wood gasifier design presented in this report has as its origin the proven technology. If you google “fema gasifier” there will be several documents that should pop up. Below is an example.

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In fact, the use of wood gas as a fuel is not even restricted to gasoline engines; if a small amount of diesel fuel is used for ignition, a properly adjusted diesel engine can be operated primarily on wood gas introduced through the intake manifold.

Except for the technology of producing alternate fuels, such as methane or alcohol, the only solution for operating existing internal combustion engines, when oil and petroleum products are not available, has been these simple, inexpensive gasifier units. The filtering must be good enough to capture the tar to protect the engine from wooc gummed up. There is a surprising duration of energy generation and the model can be scaled to meet higher energy requirements.

If you research other forums frequented by those with experience such as driveonwood. This simplified design employs a balanced, negative-pressure concept in which the old type of sealed fuel hopper is no longer necessary.

One of the most simple gasifier designs out there. She said she got a brazillian. He got good results using charred wood chunks in a FEMA gasifier to fuel his trucks.

For example, the body of the unit consists of a galvanized metal garbage can atop a small metal drum; common plumbing fittings throughout; and a large, stainless steel mixing bowl for the grate. The presence of char and ash serves to protect the grate from excessive temperatures. The wood gasifier design presented in this report has as its origin the proven technology used in World War II during actual shortages of gasoline qood diesel fuel. The liquid fuels used in gasoline engines are vaporized before they enter the combustion chamber above the pistons.

However, it’s probably best to take the next step and go with what is known as the “Imbert” design. A more robust gas producer. Section 1 describes gasification principles and wood gas generators, in general, and gives some historical background about their operation and effectiveness. This report attempts to preserve the knowledge about wood gasification as put into practical use during World War II.

The fwma is urged to use his ingenuity and initiative in constructing his own wood gas generator.


Wood gas generators are not technological marvels that can totally eliminate our current dependence on oil, reduce the impacts of an energy crunch, or produce long-term gsaifier relief from high fossil fuel prices, but they are a proven emergency solution when such fuels become unobtainable in case of war, civil upheaval, or natural disaster.

The first question many people ask about gasifiers is, ‘Where does the combustible gas come from? However, petroleum shortages during World War II led to widespread gas generator applications in the transportation industries of Western Europe. Wayne Keith worked pretty well with a modified FEMA design gasiifer that I can attest to any working experience as my knowledge is through literature.

FEMA wood gasifier demonstration and DIY specifications (biogas forum at permies)

The purpose of this report is to develop detailed, illustrated instructions for the fabrication, installation, and operation of a biomass gasifier unit i. So, yeah, I’m being a tad melodramatic. In diesel engines, the fuel is sprayed into the combustion chamber as fine droplets which burn as they vaporize. One example welded a restriction plate on the end of the fire tube and supplied air to the fire tube via nozzles, and closed off the hopper so all air entered the system through the nozzles.

In fact, many people can recall a widespread use of wood gas generators during World War II, when petroleum products were not available for the civilian populations in many countries. Such knowledge is not necessary for constructing and operating a wood gasifier. As long as the principle of airtightness in the combustion regions, in the connecting piping, and in the filter units is followed, the form, shape, and method of assembly is not important.

You have to use harsh solvents such as gasoline to clean it off and when you stink your house up with the smell of tar and gasoline your spouse will make you give up your gasifier project and dreams or else they will KILL you and bury you in the back yard with it and tell your family that you left the country.

It can be built with a minimum of tools. Therefore, in any case I expect a FEMA design to introduce tar into an engine at a rate many times higher than an Imbert all else equal.

With good charcoal one can generate a clean fuel gas with a steel can and a couple of tubing connections see Gary Gilmore’s work. This unit was wpod mounted onto the front of a gasoline-engine farm tractor and successfully field tested, using wood chips as the only fuel; see Fig. An important issue in the design of the stratified, downdraft gasifier is the prevention of fuel bridging and channeling.

I think owning people is wrong. The purpose of a gasifier, then, is to transform solid fuels into gaseous ones and to keep the gas free of harmful constituents.


Imbert gasifier vs FEMA gasifier

A proven design concept that works very well and is stable if it’s set up correctly. I am not aware of an account where a genuine FEMA design has been used to operate an engine over an extended period without problems when I write “extended”, I mean at least hours of engine operation and preferably However, all enthusiasts I know of who use gasification on a regular basis and who started with a FEMA unit have moved on.

After the discovery of large petroleum reserves in Pennsylvania inthe entire world changed to oil – a cheaper and more convenient fuel. The United States, never faced with such prolonged or severe oil shortages, has lagged far behind Europe and the Orient in familiarity with and application of this technology; however, a catastrophe could so severely disrupt the supply of petroleum in this country that this technology might be critical in meeting the energy needs of some essential economic activities, such as the production and distribution of food.

In these twin tasks lie its advantages and its difficulties. The third zone is made up of charcoal from the second zone.

FEMA Gasifier

The FEMA is a good unit for learning, so in that sense it can be useful beyond an emergency unit. The use of wood gas generators need not be limited to transportation applications. Adding the restriction plate to the base of the fire tube serves a couple functions: This region serves the same function as the fuel hopper in the Imbert design. However, this report is concerned with the operation of four-cylinder gasoline engines rated from 10 to horsepower.

I would stop short in calling this particular design as “proven” Books with such information are listed in the Reference Section see, for example, ReedVol. Therefore, if one desires to fuel an engine over an extended period with biomass, then moving beyond the FEMA design is the wise decision. Smoke and gas vented into the atmosphere while new wood was being loaded; the operator bad to be careful not to breathe the unpleasant smoke and toxic fumes.

The purpose of this design is to get engines running quickly for essential functions when only biomass is available as fuel. During operation of this gasifier, air passes uniformly downward through four zones, hence the name ‘stratified: