Fins/ pegs/ pot shells/ rocket pots. If you are going to use fins they should be attached to a pot skirt that fits snug and stays on the pot until it needs to be cleaned. This keeps the soot if any contained and away from the cook. Instead of a fin shell I am now using a "pot shell" that totally encloses the pot. The pot shell has a top tray that can be easily slid back for easy access to the pot. This is actually easier that removing a lid and another benefit with total enclosure is the pot is heated from the top as well as the sides and bottom. The top tray can also dry wood and warm food items. Another benefit of the pot shell is that it makes cooking in the rain possible. The construction is very simple and it can be built from most any material that is non combustible. A section of drum fits over a 40 qt sauce pot or a 60 qt stock pot. The pot handles may have to be bent in a little or the pot shell can be slightly oval to fit over the handles. A pot shell requires a flat top stove body or a burner under a flat surface. I believe the pot shell is the biggest bang for the buck to improve a stoves performance. They are cheep and easy to build. They add draft without allowing too much, they capture the heat, and allow cooking outdoor in the rain. If the pot shell design helps your stove, run with it, and that goes for everyone. I will have a video later today showing its use Lanny
----- Original Message ----- From: Dean Still To: Discussion of biomass cooking stoves Sent: Sunday, July 28, 2013 11:36 AM Subject: Re: [Stoves] Cajun Rocket Pot/ capacitive discharge stud weldie Hi Lanny, We tested a couple of pots with fins but the space between the fins clogged up quickly with soot, a good insulator. Best, Dean On Sun, Jul 28, 2013 at 5:21 AM, Lanny Henson <[email protected]> wrote: Lanny have you seen capacitive discharge stud welding? Yes I have a stud welder but I did not realize it would weld dissimilar metals especially aluminum to anything else. Stud welding is very finicky and will leave a blemish on the opposite side of thin metal. When a stud weld fails you have to grind the surface to clean it up before rewelding.. How are you going to do that if it is between the other studs? Attaching studs, fins or anything to a pot is going to be problematic, but attaching something to the pot holder may be practical. The heat transfer may not be as good as having something attached to the pot but it could possibly improve the heat transfer. Lanny Henson ----- Original Message ----- From: <[email protected]> To: "Discussion of biomass cooking stoves" <[email protected]> Sent: Sunday, July 28, 2013 5:23 AM Subject: Re: [Stoves] Cajun Rocket Pot [Default] On Sat, 27 Jul 2013 20:48:02 -0400,"Lanny Henson" <[email protected]> wrote: I like creative people and take no pleasure criticizing their work but it is going to be too expensive and difficult to make with all the pegs. Lanny have you seen capacitive discharge stud welding? This would allow welding of dissimilar metals to the pot in any pattern. I have no idea of costs. Have you done heat transfer tests with your 4mm aluminium pot compared with the thinner stainless one? Stainless is a notoriously poor conductor of heat and theoretically would need to be just under a tenth of the thickness of aluminium for the same conductivity, but I do use stainless pots at home. Finally can you explain the difference between a vat and a pot? Paul I do consider this to be important because biomass stoves have an inherent problem with heat transfer compared with natural gas or LPG so improvements in heat exchange will have high benefits. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] 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/ ------------------------------------------------------------------------------ _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] 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/
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