SV: Boiling Tests- Pot size - Barometric pressure

[Jeff Forssell <JEFF.FORSSELL@ssvh.se>]

I can confirm the omnipresence of these spun aluminum pots in Tanzania and
Rwanda also. The varying diameters makes it difficult to make one (=1!)
stove for a  pot surrounded by flame gases that will fit all the common
sizes.

The "kilimanjaro cooking example" brings in another parameter that should be
recorded in stove tests: barometric pressure  (or at least exact location
and date/time for possible reconstruction of barometric pressure from
altitutude and weather statistics) [Recording the actual temperature of the
boiling water - could be another simpler way of checking the same variant
{=boiling point is effected by ambient pressure which depends on altitude
and weather}] 
 

Jeff Forssell  (två s)
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	-----Ursprungligt meddelande-----
	Från:	elk [SMTP:elk@wananchi.com]
	Skickat:	den 9 januari 2002 07:47
	Till:	stoves@crest.org
	Ämne:	Boiling Tests- Pot size

	Throughout East Africa one finds the all-pervasive pressed aluminum
pot in markets, dukas, kiosks, supermarkets and even offered through you
car's window in traffic jams.
	 
	This flat-bottomed pot comes in a very wide range of sizes- you can
buy a set of 20 pots or more all neatly nestled into each other ranging up
from 10 cm diameter. The biggest I've seen must be close to 1 meter in dia.
	 
	My test pot size is 21 cm. internal dia. and 10 cm deep, made of 1mm
aluminum. I has a flat1.75 cm wide rim turned out  90 degrees to the pot
wall.
	 
	The (very clean) pot comfortably holds 2 litres of water and I test
charcoal on a ceramic-lined Jiko with a of approximately the same internal
diameter as the pot's bottom. Charcoal load is 750 gm. and the bottom of the
pot is (on average) 4 cm from the fuel.
	 
	I do not place a cover on the pot. I measure the usual parameters
during a test, including time from lighting to boil and consider the test
ended when simmering (the last of the tiny bubbles detaching from pot
bottom) stops.
	 
	But........ bet I could win any time-to-boil competition right away
if I conducted it at the top of Mt. Kilimanjaro at 6,400 m. altitude!
	 
	elk
	 
	 
	--------------------------
	Elsen L. Karstad
	elk@wananchi.com <mailto:elk@wananchi.com> 
	www.chardust.com <http://www.chardust.com> 
	Nairobi Kenya
	 

	 

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