[Stoves] New Handbook for Biomass Cookstove Research, Design, and Development

Tue Aug 1 17:17:29 CDT 2017

Dear Ms Neeraja, Dr Paul and to the rest of the team and to the GACC

I could not express enough my gratitude after receiving this handbook  It
is exactly what i need to boost up my knowledge and skills in stove design.
This gave  me confidence to improve my existing models and immediately
after hold training sessions to teach others.

God bless to you all.

Jed Guinto
Philippines

*Joshua B. Guinto*Specialist, Appropriate Technology
MSc Management of AgroEcological Knowledge and Social Change (MAKS)
Wageningen University, The Netherlands 2006 to 2008
Recipient, International Fellowships Programme  Award (IFP) 2005
Ford Foundation

2017-08-01 7:19 GMT-07:00 Paul Anderson <psanders at ilstu.edu>:

> Stovers,    (and placed on the   ePosts   at the  www.drtlud.com  website
> for easy access and wider audiences)
>
> This new publication is definitely worth some of your time to download
> (free), save, and look at (at least scroll through and "read at your degree
> of interest").   Good diagrams, and very nice summaries of the issues of
> stove R&D and design.
>
> Download the full handbook here: http://cleancookstoves.org/
> resources/517.html
>
> Of course I focused on the TLUD issues.
> 1.  No glaring errors were noted.  (Opps, one is noted when I wrote the
> content below).
>
> 2.  There were some understatements that have background stories that
> would be too detailed for this publication.
> Example is on Page# 22 (22 of 36 digital sheets).
>
> FUEL BATCH SIZE AND RELOADING IN GASIFIER STOVES
> Users of batch-fueled cookstoves like TLUDs often wish to continue cooking
> after the initial fuel
> batch has burned out. Adding new fuel to the stove causes it to switch
> from operating in a TLUD
> mode to a conventional updraft gasifier mode (Figure 15).
>
> That part is true.  But then it goes on about Tryner's work at CSU with
> observed difficulties (correct) but does not say that that research put in
> a substantial amount of new fuel all at one time (a major cause of the
> difficulties).
>
> The continuing paragraph refers to Aprovecho results with a  TLUD-FA stove
> (incorrectly reference to the Reed-Larson 1996 article about TLUD-ND
> stoves)  and states that performace is not compromised when:
>
> the user can meter in additional fuel through the door in a low-power
> operating mode.
>
> Sorry, but in my opinion, there are serious compromises (some increase in
> emissions including when each new amount of fuel hits the top of the
> charcoal bed and shortening the stove life because of high temperatures
> from air directly blowing on hot charcoal in the bottom).  Therefore, this
> refueling is NOT good advice.   So, I would say that this is a glaring
> error that unfortunately will be repeated over and over, with citation to
> this publication.   But that is only my opinion.
>
> 3.  A few missed opportunities to make more complete statements:
>     Example:  Page # 32 (34 of 36 digital sheets):
>
> To achieve more turbulent flow without a fan, natural-draft cookstove
> designers have added features
> to the interior geometry that suddenly change the flow path and create
> turbulence in local
> mixing zones.
>
> Very true.   Then comes the example with a side-feed stick-burner stove
> (rocket type, but not showing the rocket fuel shelf;  in fact, I do  not
> recall seeing a full discussion of the true Rocket innovation by Winearski
> to have the air entering under the burning tips of the sticks).
>
> For example, the Envirofit G-3300 has a choke ring, like a large metal
> washer, in the riser. The
> choke ring disturbs the flow of air and combustion gases and generates a
> local mixing zone
> (Figure 20) (DeFoort et al., 2010.
>
> Then there is reference to Natural Draft TLUDs, but only the stationary
> vane that were pioneered by Kirk Harris (not mentioned) and attributed to
> Aprovecho.
>
> What was not mentioned is the "concentrator"  (disk or plate) that does
> precisely the same thing as does a "choke ring"and it is the
> fundamental innovation of Wendelbo's Peko Pe TLUD (1990s) and Anderson's
> Champion TLUD (2005).
>
> I hope that others will send comments about this publication that is
> worthy of wide consideration by all "Stovers".
>
> Paul
>
> Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
> Email:  psanders at ilstu.edu
> Skype:   paultlud    Phone: +1-309-452-7072 <(309)%20452-7072>
> Website:  www.drtlud.com
>
> On 8/1/2017 6:36 AM, Neeraja Penumetcha wrote:
>
> Biomass cookstove technology and performance have significantly improved over the last decade. Yet entrepreneurs and designers trying to build a better stove can still face a wide range of challenges. Design features that improve performance can come with higher production costs or usability challenges, for example. Enterprises often have limited resources for research and development, but must produce higher performing, usable, affordable technologies to stay competitive. R&D advancements that help balance these requirements are often not translated into practical guidance that is accessible to stove designers.
>
> A new handbook aims to help designers and entrepreneurs by translating recent R&D advances into practical approaches for improving biomass cookstove performance, usability, and affordability. The Handbook for Biomass Cookstove Research, Design, and Development, was developed in partnership with MIT's D-Lab and the Global Alliance for Clean Cookstoves, with funding by UK aid from the UK government. Topics including ignition, air, fuel, mixing, and materials are covered through a synthesis of research findings and innovations from several different organizations. These components of the cooking process are all highly interrelated, so the handbook encourages consideration of these components together.
>
> Download the full handbook here: http://cleancookstoves.org/resources/517.html
>
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