[Stoves] Alternative to charcoal

[Crispin Pemberton-Pigott]

That's pretty funny re the name. The name apparently goes way back and has two spellings. The Nova I added. It can be shortened to ASN or Supra Nova. 

We are thinking about using the basic layout as a shell into which different combustors can be added for charcoal, wood and pellets to operate as a TLUD, BLUD or Vesto-type combustion (controlled primary air, preheated secondary and a refuellable top-loader. 

There is a side fuelled version at the YDD Lab as well. 

The performance (only have really good thermal efficiency data with charcoal and a couple as pellet TLUD) is comparable to the Anglo Supra but it can handle a wider variety of fuels and could have drop-in combustion chambers. That means the burn time can be adjusted from 'full' as a TLUD. Diameter sets power, depth sets burn time. 

Many people use this stove in town and as it has a cost of ownership of about $1.60 a year, it is a bargain. 

The ASN doesn't cost more, it just does more. It has about 1/4 the CO late in all burns because of better combustion. Initially it is about the same (it's pretty good). 

Regards
Crispin
-----Original Message-----
From: Paul Anderson <psanders at ilstu.edu>
Date: Wed, 10 Apr 2013 09:20:44 
To: Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
Cc: Crispin Pemberton-Pigott<crispinpigott at gmail.com>
Subject: Re: [Stoves] Alternative to charcoal

Dear Crispin and all,

We await the more complete document from Crispin about his "Anglo Supra 
Nova" charcoal stove with claims of TLUD performance.   I saw it in 
Cambodia (but not in operation).   I think it has great potential.   
(But the name is a bit long, and Anglo is not a selling point in many 
cultures.)

Paul

Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

On 4/9/2013 12:18 AM, Crispin Pemberton-Pigott wrote:
>
> Dear Alex
>
> Cecil certainly does because lifespan is core to his arguments about 
> improving the experience of the owner. If a Keren stove lasts about 3 
> months in Yogyakarta, 2 weeks in commercial use, then a stove that 
> lasts 3 years can justifiably be quite a bit more expensive.
>
> Whether burning the char lowers the lifetime or not is dependent on 
> the materials and the temperatures. I think there is an assumption in 
> the tincanium stove producers that burning char is bad because their 
> stoves can't handle it. Other people make stoves that only burn 
> charcoal so if they are adapted to burn wood as well -- no problem. 
> The technology is not limited to what people happened to use to build one.
>
> Here is an Anglo Supra Nova (nominally a charcoal stove) burning 6mm 
> wood pellets TLUD style.
>
> Here you can see individual preheated secondary air jets entering the 
> wood gas.
>
> Here you can see the charred pellets being burned after pyrolysis is 
> complete. This is accomplished by opening the primary air door which 
> changes the air/fuel ratio on the primary side.
>
> This unit is slightly cheaper than the Anglo Supra (a sort of Thai 
> Bucket which was itself introduced 30 years ago by Robert van der Plas 
> and 'Tig' Tuntivate, so it is rumoured). It has a working life of 
> about 3 years burning charcoal. Cost is $5.50 retail, much less at the 
> producer.
>
> Regards
>
> Crispin
>
> Crispin,
> Do you think it is useful to place a value on the reduced life span of 
> a $5 TLUD  when burning char compared to the same TLUD not burning the 
> char?
> Alex
>
>
>
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