Re: Truncated cone basket grates and "boil offs"

["Paul S. Anderson" <psanders@ilstu.edu>]

Crispin and all,

Two points:

1.  A 9-inch pot (make that a 9-minch diameter which is 2.5 cm less than 25 
cm) also sounds good, as does the idea of more water, to which I suggest 2 
liter quantity.  And alumunum.    That is so completely different from the 
other "standards" that those results could only be compared with others 
from similar circumstances.   And there is NO need to eliminate any such 
combination, but it does need to be clear to all.

As I said, someone (probably the prize givers, and their experts) will need 
to give us the OPTIONS (I hope for more than only one option.)  Then 
participants (in research or contest) could pick the one or several that 
they want to use.

We should remember the much earlier comment about how the developed-society 
people have a dozen or more "cooking" devices.  So, options ARE 
logical.  (At least we are not talking about standard tests for boiling 
milk or cooking x grams of rice.)

2.  The competition for charcoal BBQ lighting is NOT at my university, 
Illinois State U, thank goodness.

Paul


At 10:35 PM 1/6/02 +0200, Crispin wrote:
>Dear Paul
>
>We must have a 'boil off'!  Sounds like you got something pretty good there.
>I am glad to have our unit alongside for comparison.  How is it faring?
>
>I read Kevin's pretty good list of rules and only want to change the can
>diameter.  It is too tall for its diameter to represent a real application.
>In fact, my 'hot spot' under the pot will be bigger in diameter than the can
>which guarantees terrible heat losses.  I favour the 9 inch diameter pot and
>then any suitable amount of water in it.  1 litre isn't much but still OK
>with me.
>
>A 9 inch aluminum pot weighs about 620 grams without handles and has very
>little heat stored in it even when it's boiling water.  It is a pretty good
>'standard' because it doesn't interfere with the boiling very much..  I
>think most countries can get one at any store.
>
>I do favour putting the pot onto a running stove because if a test involves
>the lighting up period, the fuel will play far too great a part in the test.
>For example, I would make the stove out of very thin stainless steel to
>minimize the initial warming of the grate and secondary air tube.  It would
>be crafted to win the competition, not to cook well or efficiently.  If I
>could build my own stove and pot combination, I am pretty sure I could boil
>a litre of water in 2 minutes with only 50 gm of wood fuel.  It would be a
>bit pointless.  I could certainly get most of the way to the boil with only
>the 1 stick allowed for fine splitting into kindling.  I would shred it and
>leave out the other wood so as not to have to heat it.
>
>A similarly styed Bar-B-Q lighting competition got going with the staff from
>one of the universities (Illinois State?) some years back.  Match to a
>glowing bed was the test.
>
>They started to get out of hand about 5 or 6 years ago.  Last year's winner
>(meaning 2000) I think used compressed acetylene or hydrogen and liquid
>oxygen to start up the fire and it took only about 0.5 seconds, and that's
>official.  Everyone had to stay back about 500 yards while it was lighting
>up.  There are pics on the net showing the conflagration if you know where
>to look.  It is rather like holding a Saturn V launcher over a Bar-B-Q.
>They have a stash of entries each year at their annual 'picnic'.
>
>I am pretty sure we don't want to get to that stage.
>
>Can we bone-dry the fuelwood and store it in a pressurized tank of hydrogen?
>Jes' askin'.
>
>Soon there'll be more rules than NASCAR which started with a 'run what you
>brung' attitude.
>
>"Ahh-h-h the good ol' days...when people just brought in their stoves and
>lit them up for make coffee!  That was before they went 'professional' and
>brought on ringers from overseas with titanium parabolic heat reflectors and
>'trick' high density silicon-aluminum ultra thin pots and 30 foot
>chimneys..."
>
>I may try one just for fun!
>
>Regards
>Crispin
>
>
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Paul S. Anderson, Ph.D.,  Fulbright Prof. to Mozambique 8/99 - 7/00
Dept of Geography - Geology (Box 4400), Illinois State University
Normal, IL  61790-4400   Voice:  309-438-7360;  FAX:  309-438-5310
E-mail: psanders@ilstu.edu - Internet items: www.ilstu.edu/~psanders


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