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Solar kiln - questions regarding first drying run5/26
Am going to be starting up a solar kiln for the first
The kiln is based on the Virginia Tech plans, and
From my reading of Gene's many articles/responses
Typical pile I'll be working with will be 4 feet
There are three fans, with high/med/low settings.
Assuming the above is true:
Question 1 - fan speed:
Question(s) 2 - setting vent openings:
Question 3 - weighting the pile:
First load in the kiln will be 4/4 white ash.
The VT kiln documentation lists the max MC loss
All responses appreciated
1. High speed all the time
2. Vents are opened to exhaust moisture and so they are not opened very fat for most hardwoods. Wide open vents will minimize heating, as the warm air will be exhausted after one pass through the load. With only 4– bf of a fast drying species, open the vents perhaps 1/4. Near the end, close them a bit as heat will help achieve the final. Low MC.
3. A thick concrete slab will absorb heat and release it later in the evening. It will be hard to get good stress relief with 100% RH. I never used weights in all the runs I did.
Thanks, Doc ...
Is there a typical target for the temperature
If I'm interpreting your response correctly,
I suppose in an ideal setup, outside air would
Your idea about vent operation is how many non-solar kilns operate. Adjusting the vents to a small fixed opening is how to avoid sophisticated controls.
The kiln fans can be turned on when the kiln has roughly heated up 20 F above the morning low temperature, not current temperature. This will occur at about the same time every day for a month span or so. This means we can use a timer to turn on fans