[Stoves] Rice husk stove and rice husk gasifier

Christopher Bradnum Christopher.Bradnum at nottingham.ac.uk
Mon Oct 17 09:23:57 CDT 2016


Dear Ken, Paul, Ronal and Roger,

Thank you for the links and details. I will ask the student to get on with the research. I too will start looking at the literature available and be in a better position to advise her.
I don’t expect any major breakthroughs as she is a third year student, but as with all work in this area, an incremental improvement can move the conversation forward.
Roger, the Mayon Turbo Stove looks really impressive, she will definitely need to start her investigations there.
Excluding the fan was her suggestion, but this really is the earliest possible stage of the project and we will need to be more open minded about what needs to be included or excluded, thanks Paul.
As we get on with the development work I will ask her to show her results to this forum.

Thank you all again, kind regards

Chris

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Ken Boak
Sent: 14 October 2016 14:28
To: Discussion of biomass cooking stoves <stoves at lists.bioenergylists.org>
Subject: Re: [Stoves] Rice husk stove and rice husk gasifier

Chris & List

modern experience of rice husk gasification  - a paper from 2014

https://halshs.archives-ouvertes.fr/hal-01107615/document

plus a  link to an old paper with some information on rice husk gasification

https://books.google.co.uk/books?id=JKty_OlU8bEC&pg=PA12&dq=gemcor+rice+husk+gasifiers&hl=en&sa=X&ved=0ahUKEwjYr8bAsdrPAhVBKsAKHbnhBbIQ6AEIHjAA#v=onepage&q=gemcor%20rice%20husk%20gasifiers&f=false

On 14 October 2016 at 13:05, Christopher Bradnum <Christopher.Bradnum at nottingham.ac.uk<mailto:Christopher.Bradnum at nottingham.ac.uk>> wrote:
Dear List Member

I am looking for some help on a project one of my students is starting.

I have a Taiwanese student who would like to develop a passive (not electric fan) rice husk stove for her home as her major project for the BEng in Mechanical Engineering at the University of Nottingham. Depending on the success of the project, her family may consider starting a business manufacturing such stoves within their community. Her family own a rice farm and they have a lot of material that they can convert into energy. They already have a stove (sorry I don't have the photographs of this) which they use for some of their cooking needs. It has a deep central 'pot like' component (+/- 750mm tall X 300mm diameter) with a grid at its base which holds the burning rice husk. This 'pot' is located inside a larger vessel. At the base a fan directs air in below the central rice burning 'pot'. A separate pot holder unit is placed on top of the whole configuration. This has, what looks like, an inverted colander at its centre through which the flame reaches the cooking pot. The stove complete is around 1,000mm tall. The rice husk is top lit inside the central pot and I assume the air pushed in from underneath helps to fuel the fire. The stove produces a reddish / purple flame and I am told a pot filled with fuel lasts for 5 hours. Although I can't quite work out what needs to be cooked for that long.
The student returns home in December and will complete some rudimentary tests to get a baseline for the efficiency and emissions given off by the stove. I will also get her to complete the heterogeneous cooking test developed by SeTAR under Prof Harold Annegarn and Crispin Pemberton-Piggots' supervision at the University of Johannesburg.
Leading up to that testing I want her to get on with a bit of research, so I thought to turn to this very excellent group and ask for some help (standing on the shoulders of giants...).
Has anyone on the list worked with rice husk as a fuel source and does anyone have any research work we can look at as a starting point? Particularly using rice husks as a fuel for cooking.

It seems to me, through superficial online perusing, that a rice husk gasifier might be a better utilisation of the raw material. If it is a good system to convert rice husk into energy I would like to make and test one of these too. Does anyone have research around rice husk gasifiers that I could start investigating? Is this a good or not so good use of the fuel?

Kind regards

Chris





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