Vietnam

Small gas cooker using pellet biocarbon
Medium gas cooker burning pellet biocarbon
Medium gas cooker with pot and  'Vietnam Magic Fire'
Close up of Medium gas cooker"Vietnam Magic Fire'
pellet biocarbon
Shaped "anthill" biocarbon Briquette

After over 30 years of doing theoretical and experimental research, the authors of this document (Newtech Co., Ltd. in Quy Nhon city, Binh Dinh and Tan My Kim Co., Ltd. in Ho Chi Minh city, Vietnam), until now, have completed all not only modern but also cheap & user-friendly technology solutions which can help the poor all over the world do cooking by gas generated at their home without buying any drops of liquefied gas.

These technologies solutions can be developed in a country or in a big city or small town in any countries in the world, even it is in America, Europe, Australia and especially in Asia and Africa.

The authors believe that the modern but simple technology solutions stated hereby will start an era of a great revolution in cooking for billions of the poor all over the world and they hope that such technology will satisfy all poor persons.

The authors are very willingly to transfer these technologies to the countries in accordance with the international law in order to be together with such countries to help the poor all over the world.

Great half hour television program explaining Rice Hull Gasifier Stoves, and their potential in Vietnam.

It includes a good comparison of different stove types and designs, and interviews with people using the stoves.

Same video, the Vietnamese version:

EQT Support Boost

On February 22, 2012 I did three boiling tests.

The first test was carried out on a normal propane gas burner that I have in my kitchen.

http://youtu.be/w8OdW_GEhWo
Here it took 6 minutes and 6 seconds to bring one liter of water to a boil.
The burner shown in this video is a very efficient premix gas burner.
But since it operates solely by means of convection, its performance is not optimal.

The second test was carried out using the 150 gasifier:

http://youtu.be/jK3UTe1Lxqk
Here it took 3 minutes and 42 seconds to bring one liter of water to a boil.
Note that the same pan without a lid was used in these two boiling tests.
Here heat is transferred by both convection and thermal radiation.

The third test was carried out using an insulated electric water kettle, as shown here:
http://dl.dropbox.com/u/22013094/150%20Gasifier/Boiling/IMG_1042.JPG
Here it took 3 minutes and 25 seconds to bring one liter of water to a boil.
In this way I was able to compare the two previous results
with what could be considered to be the fastest way to boil water in a kitchen setting.

I wonder if you have found any technical design literature for this added radiative mesh? (Materials, wire diameters and spacing, etc?)

I have no theoretical understanding with regard to what is happening with the wire mesh dome.
I tried flat wire mesh, and this did not work at all.
The wire mesh has to be in the form of a dome to accommodate the small diffusion tail that you see here:
http://youtu.be/WXZvvoxCm1g

I tried wire meshes of various apertures.
If the aperture of the wire mesh is too big, the flames are not contained properly under the dome.
If the burning of gases takes place above the dome, the dome does not turn red hot.
This week I will experiment with much finer wires and apertures.

Also, if I turn down the primary air to a point where much less gas is produced,
combustion no longer takes place at the burner holes but within the apex of the dome.
Here a most unusual but stable cloud of burning gases is formed.

Stove schematic
building the stoves
testing the stoves

Stephen Joseph, Do Duc Khoi, Tran Manh Hung, Mai Thi Lan Anh, Nguyen Van Hien, Nguyen Hong Hanh, Hoang Huu Dung

SEM Images C. Chia and with the University of New South Wales

Please Read the Original Slide Presentation
http://stoves.bioenergylists.org/files/development_of_tlud_cookstoves_and_drum_ovens_in_north_vietnam_0.pdf Air Jordan VIII Low

aquaponics schematic

Stephen Joseph

The system uses

  1. Biochar reactor to convert all residues and purpose grown crops (especially bamboo and acacia) to biochar for use as a growing media, filter and for feeding to fish with wood vinegar (1% biochar with ,25% wood vinegar).
  2. Heat from biochar reactor maintains optimum temperature for fish and pl,ants
  3. Biochar used as a medium for improve nutrient uptake in either pots tanks or troughs. Note with biochar water flows through troughs for only 1-3 hours per day reducing electricity requirements.
  4. Aeration pond to grow water plants, fingerlings and filter water

Read the presentation for more detail:
http://stoves.bioenergylists.org/files/schematic_biochar_aquaponics_with...
Air Jordan 7 Sandals Slippers

Paul Olivier, September, 2011

Paul Olivier is working from Vietnam, and had put together a comprehensive pdf article explaining the benefits of using TLUD and other gasifier stoves to avoid cooking smoke and create biochar. Cooking Smoke is a major health problem in both rural and urban areas in Vietnam and many other parts of the world, and improved stoves that can also produce biochar can also help urban and rural people retain nutrients in their soils, and reduce pollution.

For more, please download the pdf: Biomass Gasification and the benefits of Biochar

Paul Olivier, April 2010

Today we put in operation for the first time the 250 gasifier with a stove top.
This gasifier has a single 2-inch pipe that vents housing air to a warmer grate.
This pipe had no butterfly valve or other restriction.
We used the same small 80x80 mm fan as in the 150 gasifier.
This fan had no problem at all supplying air to the reactor and to the 2-inch pipe.
The burn lasted almost an hour on rice hulls, even though the height of the reactor was no more than 70 cm, the same height as in the case of the 150 stove.
The warmer grate had sufficient heat from the housing to fry an egg, as indicated in picture 855.
We obtained a bright blue flame, as shown in picture 865,
although the camera did not have the right lighting to display it properly.
The stove top was not properly reinforced when a large pot filled with water was placed on top.
There was a deflection of a few mm's.
However this can be easily remedied with two more lateral braces underneath the stove top.
In conclusion, the 250 gasifier works well and delivers an enormous amount of heat.

A CLEAN BURNING COOKSTOVE DEVELOPED IN VIETNAM
Alexis Belonio, Tran Binh, Doan Thi Minh Nguyet, and Bui Dinh Hai
VINASILIC SJ, Socialist Republic of Vietnam and Center for Rice Husk Energy,
Philippines January 24, 2010

Build an Improved Cookstove
EASE Vietnam,June 30, 2008


This video is published under Vietnam EASE Programme which stands for Enabling Access to Sustainable Energy. The video is product of Improved Cookstove Market Development Project implemented by Research Center for Energy and Environment (RCEE) and Center for Population Environment and Development (PED). The video was recorded in an on-job training in Thai Nguyen province.

Click on the story title to see the full story and more movies.

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