Project Everest

Proposed Experiment

[Proposed Experiment]: Fuel Fiji - Rocket Stove Testing: Korolevu Village Trial - January 2018

Fiji Fuel Sustainability has proposed testing the Rocket Stove at a level of high demand which will provide massive insight into the project’s durability and viability. There is significant expression of interest (54 families) regarding the Rocket Stove in the Korolevu Village, Inland Fiji.

We plan to provide Korolevu with a goal of 5 stoves, of different sizes and materials. These prototypes will be constantly tested over a 3 month period. The trial’s purpose is to test our stoves at a high stress and demand level (5 stoves for 54 families, potentially burning up to 10 hours a day). We aim to visit Korolevu once every week to conduct the tests outlined below:

Smoke emitted by the stove

  • Keiyasi hospital will be contacted to obtain data relating to smoke inhalation
  • Data from the trial village (Korolevu) can be compared with old data and data from other villages not involved in the trial
  • Interviews are to be conducted in the village to obtain primary data on health effects

Temperature of the stove

  • The temperature of the stove will be measured to obtain data about efficiency and performance.
  • An infrared temperature gun and infrared camera will be used to record the temperature of the stove pot and ambient temperature over the cooking time.

Time needed to boil water and cook local foods

  • Testing if the Rocket Stove is more efficient and requires less time to cook various foods is a critical selling point
  • a timer will be used in conjunction with a thermometer to measure how long 3L of water takes to reach 100°C and the process can be repeated with foods

How much wood is required

  • Firewood collected by the villagers on a daily basis
  • Test aims to demonstrate the decreased quantity of firewood needed for the Rocket Stove
  • Mass of firewood will be measured, then a set quantity of water heated to boiling point where any remaining wood will be weighed to determine how much wood is consumed

Heat loss with/without ashtray

  • Ash and coal falls through bottom of the stove carrying significant heat; which is lost to the ground
  • A tray at the bottom of the stove could keep this heat closer to the stove
  • Test will measure time to boil water; one trial with an ashtray, and one without and results compared

Life span test

  • Stoves assumed to be used continuously in village trial.
  • Any changes in data patterns may indicate significant wear, breakages or issues with efficiency.
  • Researchers from Adelaide University will be contacted to obtain results from their testing on the July rocket stove to compare.


Does anyone have any suggestions or recommendations? Especially on the specific tests and how to implement them further.


edited on 6th September 2018, 01:09 by Justin Hakeem

Scott Jucius Dec 5, 2017

Looking at the photo above, the welding of the handles will be the first place to fail due to expansion caused from the heating and cooling processes of cooking. Therefore, impact testing at hot and cold temperatures of some description such as dropping objects on the handles (which could happen during cooking) would probably be an important test to carry out.

Also with regards to the handles, how hot do they get during the cooking process and is possible to move the rocket stove with bare hands shortly after cooking without getting burnt?

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Ciaran Hoare Dec 6, 2017

RE: the handles, an external handle could be used that hooks under the stove from either side, which is then removed once placed down again. Depends if current handles fail under normal usage.

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Larissa Steele Dec 6, 2017

Absolutely love this idea!! What an amazing way to test durability given that was a major factor that the July team had trouble testing beyond a few tests.

Not sure how the arrangement is working regarding how much time is spent per week collecting data, specific families you will be in most contact with (regarding time constraints as asking every family may pose a time issue), but be sure to really plan the maximise the time at Korolevu each week(?). By that I mean, rather than ask the questions in order to every family you encounter, ask more specific and most value adding questions that we know least about first and then constantly revise the questions rather than just following a set order as I suspect you will get similar responses to questions such as 'is there less smoke' so there wouldn't be much point asking that 54 times.

The questions themselves are great - again as mentioned in my comment in the other post, utilise as many forms of information gathering as possible e.g. videos, photos, interviews and non-intrusive observation. More observation in terms of how the cookstove is used would be great e.g. how much is it moved around, how often is it used indoors or outdoors on a farm, is it taken or used within village, are there any additions or adjustments that can be made to make the stove more suitable which we have not considered and may only become apparent through repeated use. Also how the cook stove fares when left in the rain vs indoors. Not sure how effective tracking will be e.g. designating 2 cook stoves to be used outdoors exclusively (maybe too much).

Curious to hear more about how this data gathering from Korolevu will unfold - does everyone in the team head inland every week or is it just a group whilst another remains in Sigatoka? How long are the stays and what kind of planning/data gathering is going into each visit? I presume this is specific to Korolevu - what other testing and empathising is occurring in other villages alongside this testing period?

Lastly, how are the charcoal briquettes going?

Keep it up and excited to hear about the progress!

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Wade Tink Jul 1, 2018

Status label added: Proposed Experiment

Results of this test...?

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