projecteverest

Work Update

The Rocket Stove 2.0

by
Jack Whaley
Jack Whaley | Dec 3, 2017 | in Knowledge Base

The initial week saw the Fuel Team kick straight into the research and production of the Rocket Stove design.

Effective networking enabled additions to our stakeholders list through Save. Lui and Bua, our new colleagues, fulfilled our goal of attaining an appropriate connection to the villages of interest. They expressed commitment to organising village visits for us.

An additional Fuel Assessment connection meant that a new stove, namely Rocket Stove 2.0, could be produced by “the smartest” handyman in Sigatoka, Kash. The stove was ready within 6 hours and cost $60, meeting our design goal of producing another unit. The new model included a list of modifications, derived directly from previous teams’ feedback from their village visits

These included

- Inclusion of handles

- Addition of a wood holder at stove opening

- Insertion of ventilation apertures around inner cylinder

 Secondary testing, provided more specific data to achieve our target, where 1L of water was boiling within 6 minutes with approximately 200g of wood. Compared to testing done in July, it was relatively faster.

We encountered several complications as we set out for the village of Nawairabe. A young boy swimming in Sigatoka River, however, invited us into his home where we used the Rocket Stove 2.0 to cook corn from his family’s farm. Specifically, we cooked 9 corncobs in 5L of water which took 30 minutes, instead of an hour on a traditional open stove. Even though our goal to reach Nawairabe didn’t follow through, we were still able to gain great insight into how locals would react to the stove. They mentioned that the design was a faster, more efficient and compact method than the open stove they were currently using, which was excellent feedback. The family agreed that a tray underneath to collect the ash would be a beneficial improvement, as they would use the ash and charcoal for their soil.

We visited a village inland named Nasovutava. They were impressed with the stove saying that “we need this”. We asked them about the potential of adding handles and a tray to catch ash to the design but they weren't as interested in these accessories.

We have also implemented empathy in Sigatoka Town for potential suppliers, distributors and investigation of the recycling solution within the district. As it's important to consider a long term solution, assuming Kash as an unsustainable solution.

We have attached pictures of the Rocket Stove 2.0 below.

Wade Tink Dec 7, 2017

Great stuff on this...
"Secondary testing, provided more specific data to achieve our target, where 1L of water was boiling within 6 minutes with approximately 200g of wood. Compared to testing done in July, it was relatively faster."
How much faster specifically? This can form a feature which leads to benefit which leads to value...
"we cooked 9 corncobs in 5L of water which took 30 minutes, instead of an hour on a traditional open stove"
Does this mean it's 2x faster across all uses? Good data if so.

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Kai Faulkner Dec 7, 2017

love it. i'm interested in your manufacturing choices going with Kash. for 6 hours and 60 bucks he's done a good looking job. from the pictures I can't quite tell, but is this prototype sale ready? i.e. could you sell this fidelity of product and have it stand up to the rigours of daily usage? If yes, that is awesome because producing in any sort of scale you can slash that build cost significantly. Is local manufacture something you guys are set on also? because while it may feel like the socially responsible thing to do, Fiji is hardly setup for manufacture, having the product made offshore in china for example will increase the quality and decrease the price, but thats probably something for a bit down the track.

Also, i'm sure you guys are already doing it in some forms, but Product Use Testing is super important because the users will use this in all sorts of ways that you could never forsee.
http://www.stratoserve.com/2012/06/innovation...f-testing-.html

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Wade Tink 11 months ago

Status label added: Work Update

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