Vitagoat Steam Boiler
Malnutrition Mattersi, Ottawa, Canada

Steam boiler: Operates on wood or other solid fuels or liquid gas. Steam-injected pressure -cooking can be 10 times more fuel efficient than traditional open fire cooking and more efficient than improved stove-design cooking. Water is heated in an inner chamber and the resulting steam is re-heated in a tube, creating a “superheated steam” that is much hotter than regular steam. The steam is then fed into the cooker. The boiler is inexpensive to build, safe, and can be taken apart for cleaning, which is critical since most boilers accumulate scale on their inner shells and eventually fail.

Energy Saving Stoves (pdf)
Majiko Sanifu, Traditional Irrigation and Environment Development Organization, Moshi Tanzania

Examples of Energy Savings Stoves:

Lasting Impacts of a Solar Cooker Project in Bolivia (pdf)
Melanie Szulczewski, Ph. D., Solari Household Energy, Inc. April 2006
Photos and editing by David Whitfield x Director - CEDESOL Foundation cedesol@gmail.com

Under the auspices of the French NGO Bolivia Inti, alternative energy experts David and Ruth Whitfield introduced solar cooking to many villages in Bolivia between 2000 and 2003. After demonstrating solar cookers in public forums, they then trained those people expressing interest in how to make and use solar cookers.-

Dr. Rosemarie Zacharias, Frans Peeters, January 2006

Experience with Integrated Cooking/Retained Heat Cooking
David Whitfield, CEDESOL, Cochabamba, Bolivia February 2005

Technology transfer is more a social issue than a technological one.
That is one reason our methods utilizes hands on works shops followed by

Designii Principles for Retained Heat Cookers
Dean Still, Aprovechoi Research Institute, March 2005

Guesses at Designii Principles for a Retained Heat Cookeri

1.) Air exchanges are more important than insulation