[Stoves] More about concentrators.

[Jock Gill]

I have found it more useful to cover as much of the tlud opening as possible with a solid disc some what less in diameter than the diameter of the TLUD. This does two things:

1. Makes the TLUD as close as possible to a retort;

2   Forces the pyroysis gases to the edge where it meets the incoming secondary air.

I note that the fan assisted blue flame stoves in Asia place the holes in the top plate at the outer edge of the plate, not in the center.

⁣Jock Gill
P.O. Box 3
Peacham, VT 05862

Cell: (802)  503-1258​

On Mar 28, 2019, 9:58 AM, at 9:58 AM, "Anderson, Paul" <psanders at ilstu.edu> wrote:
>Julien,    (and to the Stoves Listserv, and for posting at my website 
>www.drtlud.com/eposts<http://www.drtlud.com/eposts>   )
>
>Interesting.
>Are the nozzles with slanted walls (like in a funnel) or with straight
>sides?    What diameters at each end for what sized of TLUD gasifiers?
>
>Paul
>
>Doc / Dr TLUD / Paul S. Anderson, PhD
>Exec. Dir. of Juntos Energy Solutions NFP
>Email:  psanders at ilstu.edu<mailto:psanders at ilstu.edu>       Skype:  
>paultlud
>Phone:  Office: 309-452-7072    Mobile: 309-531-4434
>Website:   www.drtlud.com<http://www.drtlud.com>
>
>From: Julien Winter <winter.julien at gmail.com>
>Sent: Thursday, March 28, 2019 8:31 AM
>To: Norman Baker <ntbakerphd at gmail.com>
>
>Hi Norm;
>
>Instead of a concentrator ring, try a nozzle.    A nozzle brings the
>burning gases together without the shape edges of a concentrator ring. 
>The sharp edges could generate soot.  A nozzle has smooth edges.   TLUD
>nozzles are being manufactured, but they are being misused!!   People
>are turning them upside down and using them to load mason jars with
>food.   So, you can find TLUD nozzels on the shelves for food canning
>supplies in hardware stores.
>
>The reason why I got into the stove burner design business about five
>years ago was because when I used concentrator rings, I got deposits on
>the bottom of pots.
>
>Cheers,
>Julien.
>
>
>
>On Thu, Mar 28, 2019 at 1:47 AM Norman Baker
><ntbakerphd at gmail.com<mailto:ntbakerphd at gmail.com>> wrote:
>Paul;
>
>I assume you mean the diameter of the stack or combustor? In prior
>tests with concentrator rings, a whole that has a diameter of 70% of
>the stack seem to be adequate. Lately, I have been going to about an
>80% diameter.  In one publication I read the stack diameter should be
>at least 60% of the feedstock barrel diameter. Otherwise the time
>needed for gases to exit the combustor became too fast and hence too
>short for complete combustion. Is this your experience? And how about
>the rest of you chiming in on this.
>
>Norm
>
>On Wed, Mar 27, 2019 at 8:05 PM Anderson, Paul
><psanders at ilstu.edu<mailto:psanders at ilstu.edu>> wrote:
>Norm,
>
>In general, the diameter of the hole is about half of the diameter.  
>But there might not be any visible (noticeable) impact if reduced or
>enlarge 10 to 20% of the size of the  hole.  Trial and error are your
>best bets to get this refined.
>
>I look forward to hearing of your results.
>
>Paul
>
>
>
>
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