[Stoves] Fan-blaster Combustors, Stove Camp 2006, and theDell-Point Pellet Stove

[Tom Miles]

Dean,

Thanks for the explanation. So will there be two pot protocols for the UCB
WBT depending on stove size?

If I understand correctly the selection of a 45 minute simmer was originally
a compromise between 60 minutes and 30 minutes but felt to be representative
of a cooking task "load". What impact does the 30 minute simmer have on
specific fuel consumption (g/L) or emissions? 

Your 30 minute simmer sounds more like the Cambodian Comparative WBT with
about 20 minutes time to boil and 60 minutes total test time. I don't see
what quantity of water is used in the CWBT.
http://www.hedon.info/goto.php/CWBTForWood 

Tom

-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of Dean Still
Sent: Wednesday, September 20, 2006 8:52 AM
To: stoves at listserv.repp.org
Cc: 'Nordica MacCarty'
Subject: Re: [Stoves] Fan-blaster Combustors, Stove Camp 2006,and
theDell-Point Pellet Stove

Dear Tom,

I think that it takes about 2,000 watts to boil the 5 liters in the 7 liter
testing pot. But Nordica will tell us the real number today. The Philips,
Reed and Wood flame are all higher than that and are not operated in a
special way: wood is fed into the fire as it is consumed as is usual in a
cooking stove. It takes a bigger batch of fuel to boil 5 liters without
adding wood. 

We used the smaller pot, which is being incorporated into the WBT by UCB and
Aprovecho, to make quicker tests in the crowded schedule at Stove Camp.

Best,

Dean

-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of Tom Miles
Sent: Tuesday, September 19, 2006 8:31 PM
To: psanders at ilstu.edu
Cc: 'STOVES - Listserve'
Subject: Re: [Stoves] Fan-blaster Combustors, Stove Camp 2006,and
theDell-Point Pellet Stove

Maybe this is a question for Dean: what is the minimum power requirement for
a stove to be tested with the 5 Liter WBT?

If the Phillips, Reed, Woodflame stoves are all too small and have to be
operated in a special way what kind of fuel inventory and kW power rating is
the minimum for this test? Or do we know?

Tom





-----Original Message-----
From: psanders at ilstu.edu [mailto:psanders at ilstu.edu] And it was Dean who
clearly stated to me that the Woodgas Campstove has been repeatedly operated
in this same way (what I am calling "fan-blaster") in previous emissions
testing because the duration of the burning by a single load of fuel in the
small fuel chamber of the Woodgas Campstove was not sufficient for
completion of the WBT Water Boiling Test.  I am sure that is true because
the Campstove's capacity for the "official wood" used in all emissions
testing at Aprovecho is significantly less that what is needed to accomplish
even the boiling of 5 liters of water, and then still to have the pot simmer
for 45 minutes.  I understand and accept that way of operation during those
tests because the Woodgas Campstove is not able to be reloaded for further
T-LUD operation without removing the pot, emptying out the char/ash,
partially cooling the inside of the stove to prevent ignition at the bottom,
and then reloading and relighting for T-LUD operation, and replacement of
the pot onto the stove.  Such a procedure is not convenient, so the
procedural solution was use what I am now calling "fan-blaster" combustion.
What is interesting is that the "fan-blaster" mode of operation was not
recognized or noted or reported, and we thought it was a T-LUD operation.




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