Project Everest

Work Update

Prototyping our Rocket Cookstove

Krystal Kennedy
Krystal Kennedy | Jul 13, 2017 | in Knowledge Base

The Fuel team in July is currently engaged in the prototype stage of Design Thinking after Empathising with Fijian villages, Defining the problem and Ideating solutions. One prototype we are developing is a rocket stove designed by the team.

We have considered potential cookstove pathways such as an Envirofit wood cookstove, an Envirofit charcoal cookstove, a Potential Energy Berkeley cookstove and a chulha (clay stove). We have taken elements from each into a design we can build with locally sourced and cheap resources. We have contacted Envirofit about their two stoves and have contacted Potential Energy about the Berkeley stove. We have received a response from Potential Energy and may be receiving a test stove in the next week. We have completely ruled out the chulha because of transportation and time constraints.

The design of our rocket stove consists of small cylinder inside a larger cylinder creating insulation and improved heat efficiency. Others features include: a grill rack to place the firewood onto, a conical dish so the stove will be compatible for multiple pots and pans, a stand to elevate the stove off the ground, a hole in the bottom of the large cylinder for easy cleaning and two handles for easy transportation.

The rocket stove design will benefit these villages as the stove will reduce the amount of firewood burnt potentially up to 75% and will significantly reduce the amount of smoke produced. This decrease in fuel consumption will result in an overall reduction of time spent on cooking activities. A reduction in smoke would likely result in fewer cases of respiratory illnesses from cooking smoke.

Attached is a rough sketch of the design of our Rocket Stove. Let us know if you have any suggestions or comments.

edited on 14th July 2017, 03:07 by Krystal Kennedy

Vince Kostiono Jul 23, 2017

If the emission is still indoor, I am interested to know how do you significantly reduce the indoor air pollution. Have you considered integrating a chimney to redirect the emission outside? According to ResearchGate article (, Patsari stove with the chimney reduces the indoor air pollution by 66%. I have not done research since February so I might be out of date on this.

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Krystal Kennedy Jul 23, 2017

Hi Vince,

Thanks so much for your comment.

We have considered including a chimney to our stove and a chimney as a separate product. We have strayed away from this option for the time being due to difficulties in testing in-village and appeal. It would involve cutting a hole or permanent building on-site and the chimney as a lone product may be difficult to sell because the long term effects of smoke aren't well understood. Although a significant amount of villages have built in chimneys in some houses and this option did perform well in our ideation and will be recommended for consideration in for future groups.

The emission reduction that we plan for our stove is just through cleaner and more efficient combustion. We don't have the technology in country to measure emissions effectively but we are doing control tests with a three stone stove and kerosene stove and taking observations and photos for comparison. We are also looking into a relationship with the University of Adelaide where we may be able to do more controlled testing.

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Andrew Vild Sep 14, 2017

Status changed to Previous Work
Activity has died off on this thread and so we are working on slimming down ideas for the upcoming activity.

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quincy nathan 6 months ago

The design of our rocket is from a small cylinder in a larger cylinder creating insulation and improved heat. Just give a try to Other features include: a grill to place the firewood, a conical dish so that the oven will be compatible with multiple pots and boilers, backing to lift the oven from the ground, a hole at the bottom of the large cylinder for easy cleaning. and two handles for easy transportation.

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