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General Discussion / Dry Bulb & Wet bulb hygrometer or RH/EMC Probe for control
« Last post by HencoV on May 03, 2017, 08:51:37 AM »
Hi Guys,

I have always had some reservations about using RH/EMC probes instead of Wet Bulbs for control. This, in my opinion is probably because the controls I came across that uses RH/EMC control was very slow to react, and "over vented" from an early stage in drying. I suspect it was a lack of proper understanding of the programmer on the effect of RH on venting and energy usage. put my own internal conflict at rest, I decided to run some tests

I'm busy running a comparison in one of our kilns using both Wet Bulb, as well as RH probe for control purposes to try and establish the best way forward.  I'll will post my findings here in a month or so.

In the mean time:What are your views, pros & cons of each of these technologies. From a control and accuracy point of view, which would you rate best? Share your experience please
Training / Events / Southeastern Dry Kiln Club - Spring Meeting
« Last post by admin on May 02, 2017, 08:34:29 AM »

WHEN:           Thursday, June 8 - Friday, June 9, 2017

WHERE:         Technical Session at Holiday Inn Express, 1350 W Atlantic St, Emporia, VA
SEDKC Sponsored Dinner at Carolina BBQ & Chicken, Emporia, VA
Virginia Carolina Forest Products, Lawrenceville, VA
Ontario Hardwoods, Keysville, VA
Planning for the 2017 Spring Meeting is nearly complete. 

Thursday - June 8, 2017
1:00 PM Technical Session

•   Wood-Destroying Beetles - a Boring Subject, by Mike Waldvogel, NC State University, Raleigh, NC.
•   Thermally Treated Wood: Properties and Process, by Dan Mathews, SII Dry Kilns, Lexington, NC
•   Hygroscopic Issues of Installed Hardwood Flooring, by David Paal, Premier Flooring, Gainesville, GA

4:00 Troubleshooting Q & A Roundtable
4:30 Southeastern Dry Kiln Club Business Meeting
6:00 Dinner at the Carolina BBQ & Chicken, 1395 Skippers Rd, Emporia, VA
Sponsored by the Southeastern Dry Kiln Club
Friday - June 9, 2017
Plant Tours

•   Tour #1 - Virginia Carolina Forest Products, Lawrenceville, VA
•   Tour #2 - Ontario Hardwoods, Keysville, VA

Meeting will adjourn from Ontario Hardwoods.

REGISTRATION: To preregister download the registration form (click here).   Cutoff date to register is May 31st.  The registration fee is $30 per person.  This includes the meeting space and dinner.   There is no registration fee for spouses (or significant other) of members, or retired and lifetime members.  Please prepay by sending a check payable to the Southeastern Dry Kiln Club to Phil Mitchell, NC State University, Campus Box 8003, Raleigh, NC  27695-8003.  You can either FAX the completed form to (919-515-6302) or let Phil Mitchell (at 919-515-5581 or know you are coming so that we can plan the dinner. You can still pay (cash or check) at the door, but it makes our job easier if you pay-in-advance. 
HOTEL: The meeting hotel where we will have dinner is the HOLIDAY INN EXPRESS, 1350 W. Atlantic St., Emporia, VA 23847.  The hotel's phone number is (434) 336-9999.  You must make your own hotel reservations if you plan to attend.  Ask for the SE DRY KILN CLUB rate of $103.00 per room per night plus tax.  The hotel cutoff date to get this special rate is May 20th.   Please make your hotel reservations now so you are not left without a room. 
This message will also be posted on the SEDKC website.


If you signed up last year as an SEDKC member and received the 2016 SEDKC membership directory your name and company details will carry over to the 2017 SEDKC Membership Directory unless you update it or let me know that I need to delete it.  Remember, there is no cost to be an SEDKC member.  Those who have not joined can sign up now for the 2017 SEDKC Membership Directory.  Simply fill out the form and tell us about your lumber drying equipment and capacity.  If you do not dry lumber but have an interest in lumber drying, you can still be a member...if you fill out the form.

To reach the membership form go to
Moisture Variability / New Logs vs. Older Logs
« Last post by TILLAMOOK on April 24, 2017, 09:33:37 AM »
New logs versus older logs:  How does your mill deal with this?  Separate out?
Training / Events / NEKDA 2017 SPRING MEETING
« Last post by admin on April 17, 2017, 10:24:33 AM »
  • 2017 Spring Meeting Program (click pdf)
  • 2017 Spring Meeting Registration (click pdf)
  • 2017 Membership Dues - Please download the 2017 NEKDA Membership Renewal (pdf)
  • NEKDA Bill Rice Achievement Award (pdf) and Jim Catterick Industrial Award (pdf)
  • Holiday Inn, 308 North Comrie Ave., Johnstown, NY 12095 call 518/762-4686; NEKDA special rate $105

For more information, registration or tour info click here

General Discussion / Re: Dry kilns emissions reduction
« Last post by MichaelM on April 11, 2017, 04:25:39 PM »
I know of a couple installations with stacks to raise the exhaust and reduce local impact.  I do not know of any lumber dry kilns in the U.S. with emissions controls, such as rtos scrubbers, esps or baghouses.
Dry Kiln Control / Re: Better understanding statistics and variability
« Last post by PhilM on April 06, 2017, 07:42:28 AM »
To determine if your kiln is "out of whack" (which could mean different things), you need to check to see if your kiln conditions (meaning the temperature and humidity and air) in the kiln is what you actually set at the controller (eg "Get what you set").  Hopefully you have a history of kiln performance  in terms of actual kiln conditions and lumber quality.  Being able to compare what happened today with how the kiln performed in the past is a good indicator of whether the kiln is "out of whack".   If the problem is perceived "excessive degrade", then you have to separate whether it is a kiln performance issue or a kiln schedule issue.  A history of the kiln's performance will help you figure that out.
Drying Defects / Re: Agressive Schedules?
« Last post by PhilM on April 06, 2017, 07:33:35 AM »
I agree with the previous answer.  In addition, a large moisture content variability between pieces is an indication you are drying too fast.
Stacking/Sorting Wood / Tools for fixing stickers in loads
« Last post by SenecaMike on March 24, 2017, 09:13:05 AM »
What kind of tools or equipment do you use to straighten or replace sticks in your loads before drying?
General Discussion / Dry kilns emissions reduction
« Last post by SenecaMike on March 24, 2017, 09:05:41 AM »
Do you use emissions reduction equipment to reduce VOC's from your kilns?
What type of system do you use?
Drying Defects / Re: Agressive Schedules?
« Last post by HencoV on March 21, 2017, 11:21:59 AM »
Short Answer...
*excessive downgrade and/or
*dry outer shell, wet core
*longer drying times to try and get rid of wet core
please feel free to add
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