Link of the Day 102108: Sexy Stoves from Siemens [Appropriate Technology]

PROTOS plant oil stove

The home appliances division of Bosch and Siemens [BSH Bosch und Siemens Hausgeräte GmbH] have developed a very interesting plant oil stove that they call PROTOS.

In their second generation prototype, they have managed to increase efficiency as well as reduce noise, cleaning time and the cost of production compared to the initial version developed by researchers at the University of Hohenheim. The protos team is now prepping for large-scale production.

Duration: 7 min 9 sec

Job creation and the Protos

The protos technology was designed not only to provide people living in poor households with an alternative to wood, fire or charcoal as a cooking fuel, but also so that local job creation was part of the entire value chain. This applies to plant oil as well as the stove itself. As BSH introduces the second-generation protos cooker, we also remain committed to local production. To this end, the protos team is currently taking steps to establish local manufacturing capacity with a partner in Indonesia.

Everything but the burner, which requires some sophisticated tech, can be produced locally.

Early tests with 100 Filipino families (late 2004-2006) have attested to the commercial viability of the stove. In April 2006, the German company introduced protos to a broader swath of the public on the Leyte and Samar Islands in the Philippines. 500+ people have purchased the stove and “the local manufacturer now has the capacity to deliver up to 1500 units per year to the original local islands”. When Pete was recently in Austria, he met the head of Siemens Home Appliances division. They are working very hard to find partners and expand the availability of the stove to other developing countries.

Protos Base Specs

PROTOS plant oil stove

Power Range: 2-2.5 kW
Efficiency: 45-55% (similar to an LPG stove)
Fuel Type: plant and vegetable oils (e.g. jatropha, cocnut, cotton seed, castor, used oils, etc.)
Emissions: approx. ten times lower than a high quality kerosene stove
CO2 balance: neutral

From Treehugger:

Similar to a camping stove, Protos consists of a tank, a pump, a frame, a valve, a fuel line, and a burner. But all the materials are designed to meet the high temperatures the burner maintains—up to 1,400 °C—to ensure continuous vaporization and combustion with minimal emissions and soot formation. With Protos, the company hopes to replace traditional three-stone fireplaces, reduce carcinogenic emissions, prevent deforestation, and provide a cheaper means of preparing food in developing countries.

Related Articles
PLANT OIL AS COOKING FUEL: Development of a household cooking stove for tropical and subtropical countries [University of Hohenheim]

Several other stove designs by other businesses or non-profits

AIDG’s Rocket Box

AIDG's Rocket Box, designed by Beau Baldock

Rough Guide on How to Build a Rocket Box Stove
Tech Tuesday: AIDG’s Rocket Box Stove

ONIL Stove from HELPS International


Duration: 15 min 52 sec

Envirofit [with funding from the Shell Foundation]

Envirofit Stove

High Efficiency Cook Stove for Darfur

High Efficiency Cook Stove for Darfur

“In Darfur, some 2.2 million refugees cook their meals over inefficient wood fires in camps, with plenty of risks to refuel off-site. There’s nothing high-tech about this stove, but it slashes the time refugees need to spend in heightened danger.

View video if designer Ashok Gadgil describing his inspiration for making the Darfur stove.

This is obviously just a tiny handful of existing stove projects. If we missed any of your faves, toss them into the comments section.

Related Posts:
Making XelaTeco’s stoves affordable to rural communities: creative financing or doing it old school?
Estufas Mejoradas (Improved Stoves) in San Alfonso
Health effects of indoor air pollution in Guatemala
How to make a soda can stove [Video]