From: Phil Hamling
[phil@elegantimports.us]
Sent: Sunday, September 02, 2007 12:13
PM
To: Stephen Lewicki
Subject: RE: Element Analysis
Steve,
Thanks for this
analysis.
Stretch ratio is
the bottom line of my analysis (literally). See line 43.
Our numbers match
quite well. I think the only difference is that I calculated based on cold
resistance and you based on hot.
It looks like
stepping up to 2 mm APM wired in series will help the situation by lowering
the watt loading (currently ~3.3 w/sq. cm for 1.2mm dia. APM wired in parallel)
to ~2.9. It does look like a small change though. Kanthal's recommendation is
for watt loadings less than 2.2 and your competition is at 1.15 and 1.68. I
think in order to get there you will need to put more runs in each
unit.
I plan to order a
set of these 2 mm elements from you once I get back to work after the Holiday
and see if there is an improvement.
Phil
Phil -
Here is what I did - close to what you have there. You don't seem to
calculate stretch ratio which is an important factor. The best balance that I
can see is the 2mm element (this is what I quoted you the other day).
Best Regards,
Stephen
Lewicki
President
L&L Kiln Mfg Inc.
505 Sharptown
Road
Swedesboro, NJ 08085