This article explains the steps of coffee production. A review of the very few experiences of
solar coffee roasting is established. Specific aspects of solar roasting for rural areas are studied.
Based on this context the tools and approach for detailed design of the roaster are presented.
The Scheffler solar concentrator and the roaster concept chosen is explained. Optical modeling is also
used for specific aspects. Experimental work further orientates the improvement of the design.
The roaster developed is th en described in details: capacity, s ize, use of glass cover, inclination of drum,
optical issu es, mechanical aspects, thermal insulation. Support structure and secondary functions of the
roaster are also described: feeding, extraction, cooling of coffee beans.
Design characteristics are summed up and perspectives for future work are given.