Request is a little vague? How is it not working?
Taking to long to reach equilibrium moisture content, or some random air flow measurements?
Have you calculated CFM air flow through stacks?
Have you tried using a digital handheld airflow measuring device?
What do your temp, humidity measurement logs show?
De-humidification works on principle of vapor pressure. You remove moisture via a difference in moisture content of surrounding air.
The fans in kiln direct the flow and move the air past the dehumidifier more consistently. If you want measurable airflow through each layer of stack, you have to design the drying chamber for that purpose.
I.E. lumber all same length, wide gaps between layers, and minimal space on ends to force higher air pressure into stack and not around it. A picture stolen from wood workers journal:
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If ends of boards are not all same length, you need to block air from entering the dead space on the ends.
One thing I see missing is deflector down the front side end of stack to direct airflow into stacked lumber?
You must minimize any air path that is not through the stack, as airflow takes the path of least resistance. Don't need to blow air across the ends of stack.
Best Luck.
Taking to long to reach equilibrium moisture content, or some random air flow measurements?
Have you calculated CFM air flow through stacks?
Have you tried using a digital handheld airflow measuring device?
What do your temp, humidity measurement logs show?
De-humidification works on principle of vapor pressure. You remove moisture via a difference in moisture content of surrounding air.
The fans in kiln direct the flow and move the air past the dehumidifier more consistently. If you want measurable airflow through each layer of stack, you have to design the drying chamber for that purpose.
I.E. lumber all same length, wide gaps between layers, and minimal space on ends to force higher air pressure into stack and not around it. A picture stolen from wood workers journal:
If ends of boards are not all same length, you need to block air from entering the dead space on the ends.
One thing I see missing is deflector down the front side end of stack to direct airflow into stacked lumber?
You must minimize any air path that is not through the stack, as airflow takes the path of least resistance. Don't need to blow air across the ends of stack.
Best Luck.
