Recent Posts

Pages: [1] 2 3 ... 10
Training / Events / Dry Kiln Operator's Short Course
« Last post by admin on Today at 12:58:43 PM »
Dry Kiln Operator's Short Course
Raleigh, NC, May 10-13, 2016

We will update this as information becomes available
General Discussion / Re: Kiln Baffling
« Last post by Craig Jensen on October 08, 2015, 08:27:38 AM »
I'm with Mike, no real good way to do this.

We make sure to fill one track for sure, not 2 short tracks, and then that track at least dries better.

If we have a short stack, we put it on the end and not in the middle.  And then we pull based on the full track, rather than on the short side.  Reduced air flow on the side with less wood usually results in some of it being wet, so sometimes it will have to sit a little longer on the dry side (in our case under a roof) before it can be released to run.
However, we found this resulted in less drying defect than having the volume sit on the green side (out in the sun in our case) and end up too dry when it is dried with fresh cut wood later.

General Discussion / Re: Kiln Baffling
« Last post by MichaelM on October 07, 2015, 02:28:04 PM »
There is no good way to do this.

If you are just missing a few units, leave the voids in the upper layer on the sides of the tracks away from the baffles.  This way at lease one side of the track is full of lumber and baffled. 

If you had half a charge, maybe you could load one track.  This might lead to uneven drying from side to side.  Maybe the center coils be off for this.  Not sure.  I would be afraid to stack one unit wide on each track because of stability issues.

Maybe you can mix products in a kiln to fill one kiln instead of running two?  Perhaps different products on different tracks.  This might work if you are creative and have the good fortune to have somewhat compatible products.  You might have to finish the charge with one track pulled.
General Discussion / Re: Kiln Baffling
« Last post by TimothyD on October 07, 2015, 11:50:54 AM »
Hi Francis,
Sorry, I can;t offer any suggestions as this is very much out of my arena.
Hopefully one of our forum experts with experience with this will have something to offer.

General Discussion / Kiln Baffling
« Last post by fbushaw on October 05, 2015, 11:05:53 AM »
We have all double track 85' kilns. I am being challenged with coming up with a plan to baffle partial charges so the air flow isn't compromised. Does anyone have any ideas??
Training / Events / OSU lumber drying workshop
« Last post by MichaelM on September 30, 2015, 10:50:39 AM »
The OSU drying workshop will be held December 7-9, 2015 in Corvallis.
Go to for more information or to register.
General Discussion / Re: Water Supply Issues
« Last post by TimothyD on September 30, 2015, 10:45:27 AM »
Great points, Mike!
We use an RH sensor in one of our other products, but it's normal operating range is only up to 140 F in the higher humidity range, and this is a rather high end sensor.
General Discussion / Re: Water Supply Issues
« Last post by MichaelM on September 30, 2015, 10:35:55 AM »
There is a discussion of relative humidity measurement at

The wet-bulb is commonly used in kilns because of the chemicals in the atmosphere and the temperature.

Other sensors rely on resistance or capacitance and the materials generally don't work at high temperature.  Not in the wiki reference are ir sensors - water vapor attenuates the ir waves.  These are probably the most accurate, but the electronics are temperature sensitive.  Expensive too.

The resistance device that has been used in kilns is a cellulose wafer place between two electrodes.

The humble dry/wet bulb is robust and inexpensive.  The sensor (the sock) is easily changed when contaminated.

As to the original question - I would be curious what the water supply issue is.  This would seem easier to solve that figuring out a new sensor. 

General Discussion / Re: Water Supply Issues
« Last post by TimothyD on September 30, 2015, 08:47:37 AM »
That is an interesting concept.  I have a couple follow up questions:
Would an RH Sensor, providing %RH and temperature be sufficient to replace a Dry Bulb/Wet Bulb setup?
What would be the maximum temperature that the RH Sensor might need to operate in?
What RH levels might the RH sensor be exposed to during a typical charge? 

Knowing this data, would allow me to investigate a solution.

General Discussion / Water Supply Issues
« Last post by Neissa G on September 29, 2015, 12:53:16 PM »
Question received by mill personnel:
We are currently using a Dry bulb/Wet bulb setup in in our kilns but are constantly having trouble with water supply issues. Is there a reliable electronic RH sensor that can take the stress of being in a dry kiln environment?

Pages: [1] 2 3 ... 10

Forum experts

StavrosA lmod StavrosA
Stavros Avramidis Ph.D.
University of British Columbia
TimothyD lmod TimothyD
Timothy Duncan MBA
Engineering Manager
Wagner Meters
MichaelM lmod MichaelM
Michael Milota Ph.D.
Oregon State University
PhilM lmod PhilM
Phil Mitchell Ph.D.
Forum Expert
North Carolina State University
Gene Wengert lmod Gene Wengert
Gene Wengert
Forum Expert

* Events

* Job Opportunities

topic Dry End Superintendent - Camden, SC
[Job Postings]
September 21, 2015, 03:05:32 PM
topic Lead Boiler/Kiln Operator - Kettle Falls, WA
[Job Postings]
September 21, 2015, 02:56:50 PM
topic Kiln Technician Job - Beverly, WV
[Job Postings]
September 21, 2015, 02:31:28 PM