[Stoves] Fuel cylinder temp experiment needed (was Re: Bangladesh TLUD (was Re: No subsidies in TLUD char peoduction

Gordon West gordon.west at rtnewmexico.com
Sat Dec 9 08:38:56 MST 2017


On a freshly polished 16 ga steel cylinder you can watch the pyrolysis front travel because of the oxidation spectrum. In ours the front shows up as being about .5” wide  - I haven’t thought to correlate it to a temperature chart. But we have used an infrared gun and commonly see temps of 300C, and I think up to 450C. Since the question has been asked, we will make a point to verify this information. 

We are also using thermocouples to measure pyrolysis temp in the center and find 700-800C to be common in a 6” diameter cylinder with fan forced primary air.
 
Gordon
The Trollworks

 


> On Dec 9, 2017, at 8:08 AM, Andrew Heggie <aj.heggie at gmail.com> wrote:
> 
> On 9 December 2017 at 14:11, Paul Anderson <psanders at ilstu.edu> wrote:
>> Julien,
>> 
>> Truly excellent observations about Bangladesh efforts.
>> 
>> Adding this thought:  Thinking of a standard TLUD with metal fuel chamber,
>> has anyone measured the temperature of the outside wall of that fuel chamber
>> as the pyrolytic front moves to it, is at it, and then past that point of
>> measurement?
> 
> 
> The emissivity of common dull materials is similar so most of the
> infra red thermometers assume 95% but the cheaper ones like mine only
> measure up to 200C.
> 
> Steel workers have wax crayons that change colours at known
> temperatures so one could draw vertical lines down the  reactor
> cylinder.
> 
> I used to use my kids' wax crayons in this way to show the progress of
> the front in my 4" flue tube experiments.
> 
> Andrew
> 
> _______________________________________________
> Stoves mailing list
> 
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
> 
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
> 
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20171209/044e3389/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: steel-color-spectrum.png
Type: image/png
Size: 75941 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20171209/044e3389/attachment.png>


More information about the Stoves mailing list