Julius Kewir Tangka (Ph.D)

CEO Clean Energy Consortium, FASA, University of Dschang, Cameroon.

Energy Systems Design, Transportation, Installation and Management Consulting. CEO Clean Energy Consortium CEC. Full Professor of Agriculutural Energineering (Specilisation Power and Machinery) , Department

Interests: Teaching, Research and Development, Consultancy on: Renewable Energies, Rural Development, Farm Machinery,

Post Harvest Technology, Foundry Technology, Farm Mechanization, Machinery Design and Fabrication.

International partners and working groups: Methane to Market:    http://www.methanetomarkets.org/

Global village Energy  Partnership: http://www.gvepinternational.org/


PAST PROJECTS. (1)Home built wind turbines training Course with Hugh Piggot, Scotland, UK


       Training site at         http://www.scoraigwind.com/scoraig2003/                                                                                    

Pictures of wind turbine installation at the SHUMAS Farm Bam Dzeng Kumbo http://julius_tangka.webs.com/apps/photos/album?albumid=7836739

(2)Large scale wind turbines Denmark 2007


           Top  left.  Study trips to wind farms and industries.         Top right: At the Twin   windmill plant Denmark.   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

(3) Comparative study of different solar panels Negev Desert, Israel Dec. 2001


Evaluation of solar pannels from different companies around the world in the Negev Desert Israel.

(4) Energy efficient building, Enschede, the Netherlands


Left: Study tour of an energy efficient building in Enschede The  Netherlands.  Right:  International multidisciplinery consultancy assignments. 

Israel 2012:Training on Renewable Energies as a catalyst for Development (Arava Institute for Solar Energy, Negev Desert)



Research in Solar Thermal Applications


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://julius_tangka.webs.com/apps/photos/

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

Training on Rural Women and Renewable Energies in Maroua, Cameroon



Trip toTanzania


Maastricht School of Managment organised event cooporate social responsibility in Dodoma and Dar Es Salaam, Tanzania in July 2006. 

Solar Energy Applications China 2010



Some pictures of our training in solar energy applications (electricity, heating, power generation etc) at the Gansu Natural energy Research Institute,  Langzhou city, Gansu Province in China. Many pictures from this event can be found in  http://www.juliustangka.org/apps/photos/album?albumid=9408729

Electrical dryers for fruits vegetables, medicianl plants etc

Our latest model Electrical drier is 4kW and 4m3 capapcity. It operates with grid electricity. In areas of no electricity, it functions with heat from the burning of agricultural wastes such as corn cubs, rice husks, Palm kernel shell, firewood, or charcoal as shown in the pictures below.  All you need to do is just to replace the electrical fire box with the bio mass fire box. In this case clean hot air into the drier is achived by an array of 12V fans driven by solar panels. This was developed for the Ministry of Mines, Industries and Technolgical development MINIMIDT. Intellectual property protection is also being facilitated for us by the MINIMIDT 


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.

Consultancy in Oman since 2008: Now Over



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.

Solar Stills produce clean portable water from dirty water

Our solar stills can produce up to three liters and
more of drinking water a day from any source of dirty water:
They are suitable for use in places with acute shortage of portable water or regions suffering from chronic water borne deseases like cholera and typhoid. Also good for producing distilled water for your car batteries  and  laboratory use. Larger desins are available capble of procuining up to 20 l of water in places of poor solar radiation.

Biogas digesters for electricity production,heating and lighting


                  (a)                                 (b)                                     (c)


                   (d)                                 (e)                                (f)

Both industrial type and household type biogas units for running electricity generators, cooking heating and lighting. From larger reinforced concrete underground designs from 25cubic meters (a),(b)and (d)  through fibreglass and epoxy resin types  (c),  30 cubic meters and above to  the low cost small oil barrel home type with a tyre tube as a gas reservoir (e) and the 2 drum domestic digester 


            (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.

Producer gas plants

Our producer gas plants allows you to run your engine using
charcoal and wood Seen here connected to a  dynamometer to measure
engine power using vairous fuels
Plant permits you to run your farm, tractor or motor vehicle with firewood
The plant zas recently used
in an exhibition in Yaounde

LEDs for your lighting



We assemble LEDs to produce very energy effcient lighting units that can take your batteries for serveral weeks without asking for charge. Very good in installations where there is very little wind or solar radiation to constantly charge your batteries.


Efficient bio fuels press for production of vegetable oils for engine use. The one shown here is designed for jatropha seeds but could also be used for soybeans, castor oils, melon seeds, sunflower seed etc. Hydrauli presses are also availble on demand.


Industrial and domestic vegetable choppers

Women of Romajai in Kumbo watch with amazement the operation of a mini vegetable chopper. Capacity about 20kg per minute. Chopping the same quantity of vegetable by hand would take about 45 minutes.

Mini Refuse pivotable Bins for area sanitation


Oil drum domestic ovens for home baking



Daily bread acquisition  constitutes an important percentage of domestic expenditure. This is because most people cannot afford the energy to bake at home. Our experience shows that home baking reduces ependiture on bread by about 80%. Home baking can be done with a simple waste engine oil fired baking oven. It also works very well with natural oils like jathropha oil and castor oil etc. Many of these natural oils are locally available in seed grains of our ornamental plants and forest trees. Utilisation of these  oils can give added value to our trees thereby compelling the local population to protect them.

Energy efficient barbecue sets