Julius Kewir Tangka (Ph.D)
Renewable Energy Consultant, FASA, University of Dschang, Cameroon.
Energy Systems Design and Management Consultant. Lecturer, Department of Agricultural Engineering, University of Dschang. P.O Box 373, Dschang, Cameroon, Africa.Tel. Mobile. 237 77589794 Fax 23733451202 e.mail: tangkajkfr@yahoo.fr
Interests: Teaching, Research and Development, Consultancy on Renewable Energies, Farm Machinery, Post Harvest Technology, Foundry Technology, Farm Mechanisation, Machinery Design and Fabrication.
International partners and working groups: Methane to Market: http://www.methanetomarkets.org/
Global village Energy Partnership: http://www.gvepinternational.org/
Home built wind turbines training Course with Hugh Piggot, Scotland, UK
Training site at 
http://www.scoraigwind.com/scoraig2003/
Many Pictures of this event can be seen at http://www.dotphoto.com/go.asp?l=tangkajkfr&p=C0FE&AID=3892453
Pictures of wind turbine installation at the SHUMAS Farm Bam Dzeng Kumbo http://www.dotphoto.com/Go.asp?l=tangkajkfr&P=C0FE&AID=5502951&Pres=Y
Large scale wind turbines Denmark 2007
Top left. Study trips to wind farms and industries. Left bottom: At the Twin windmill plant. Middle: Exploring the narcell of the Twin windmoll 2 mega Watt narcell
Training and projects with John Furze in DENMARK Pictures here: http://www.dotphoto.com/go.asp?l=tangkajkfr&p=C0FE&AID=4587863&Pres=Y
Comaparative study of different solar panels Negev Desert, Israel.
Evaluation of solar pannels from different companies around the world in the Negev Desert Israel.
Energy efficient building, Enschede, the Netherlands
Left: Study tour of an energy efficient building in Enschede The Netherlands. Right: International multidisciplinery consultancy assignments.
Research in Solar Thermal Applications
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Left: My domestic solar water heaters are very efficient. The absorber is made of a grid of copper tubes burried in a thick slab of cast aluminun poured at 1200° C. The black painted surface area is infinately large because of the coarseness of the the green sand used in the casting. This feature improves the absorbtion of extra-terrestrial radiation. Results: Steam is procduced at mid day when the sun is over head. Picture shows thermocouple sensors for monitoring temperatures at different points in the system.
Right: Domestic intermittent solar refrigeration unit. Refrigerant is Ammonia. Powered exclusively by solar energy. Lowest temperature is 0° C and operates two cycles a day. See also the Otherpower.com Discussion Board || Solar thermal Applications.
Design, Fabrication and Installation of Wind Turbines
(a) (b)
Watch wind turbine wind turbine testing in our microwind farm above(a). In clip(b) we are testing a 5kW slow speed machine. Many pictures of our wind turbine works can be found here: http://www.dotphoto.com/go.asp?l=tangkajkfr&p=C0FE&AID=3069180
Visisting Lecturer, University of Masuku, Franceville, Republic of Gabon
More pictures of teaching and field work at the University of Masuku Republic Gabon can be found at: http://www.dotphoto.com/Go.asp?l=tangkajkfr&P=C0FE&AID=3443962&Pres=Y
Trip toTanzania
Maastricht School of Managment organised event cooporate social responsibility in Dodoma and Dar Es Salaam, Tanzania in July 2006.
Solar dryers for your crops
Low cost and high efficiency solar dryers for your agricultural products. Notice the difference between cabbage (left), pepper(right) dried in the solar dryer and that dried in open air using local drying methods
Design and fabrication of solar cookers
Together with students we designed and fabricated a solar cooker and used it that afternoon for cooking some peanuts. Students are amazed and cannot stop eating the just cooked peanuts. 
Ha ha ha be very careful when you eat directly fom a solar cooker. The young man in red shirts went down for a handful but was almost blinded by the strong concentrating solar radiation. He quickly withdrew to save his eyes but not without picking up a few grains. What a Bonne Appétit that afternoon.
Biogas digesters for electricity production,heating and lighting
Both industrial type and household type biogas units for running electricity generators, cooking heating and lighting. Notice the low cost small oil barrel home type with a tyre tube as a gas reservoir
(a) (b)
(c) (d)
In the pictures above you can see the clean buring flame of our biogas.In (a) and (b) and (c) the gas is used on a cooker. In (d) it is used to heat a poultry unit. In other projects we use it to generate electricity after filtration to remove Hydrogen sulphide and moisture.
