[Stoves] ETHOS 2013: Where is the New Data on Stove Performance in the Field?

Crispin Pemberton-Pigott crispinpigott at gmail.com
Tue Nov 27 17:43:43 CST 2012


Dear Dean and All

 

I must make a correction to one of the numbers in the message below.

Thanks

Crispin

 

 

From: Crispin Pemberton-Pigott [mailto:crispinpigott at gmail.com] 
Sent: Sunday, November 25, 2012 5:24 PM



 

>Dear Dean

 

>The tests were performed using the WBT 4:

 

>“In this study, twenty-two cookstoves burning six fuel types (wood,
charcoal, pellets, corn cobs, rice hulls, and plant oil) at two fuel
moisture levels were examined under laboratory-controlled operating
conditions as outlined in the Water Boiling Test (WBT) protocol, Version 4.”

 

>You said: “You can see that fuel use is measured, not assumed, etc.”

 

>I beg to disagree. The fuel use is not measured, it is calculated from the
energy available from the mass of fuel burned, compensated for unburned
char. I have just had confirmation of this from Jim yesterday morning. In
other words, he followed the experimental procedure laid down in the WBT
protocol exactly. The spreadsheet does not have a place to enter the amount
of raw fuel needed to accomplish a cooking task. That is why the results of
the Quad 2 stove test (636 dry g) are so different from the actual fuel
needed to perform a 5-litre WBT (1318 dry g). [I wrote 1550 because I was
from memory. I gave the moist fuel mass, not the dry fuel mass. Apologies to
all affected.  In other words the error in the stated fuel consumption is
207% not 244%. CPP]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20121127/98bdff2b/attachment.html>


More information about the Stoves mailing list