The Forestry Forum is sponsored in part by:




TimberKing Sawmills




Toll Free 1-800-582-0470

LogRite Tools



Forest Products Industry Insurance


Norwood Industries Inc.


Sawmill & Woodlot Magazine



Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

BRUTE FORCE Authorized Dealer

Woodshax Outdoor Vending Solutions

FARMA


Council Tool

Baker Products

Forestry Forum Tool Box

Author Topic: Solar kiln temps  (Read 162 times)

0 Members and 1 Guest are viewing this topic.

Offline vfauto

  • Full Member x2
  • ***
  • Posts: 175
  • Age: 54
  • Location: West Springfield Ma.
  • Gender: Male
  • TimberKing 2000
Solar kiln temps
« on: December 11, 2017, 07:57:43 PM »
What is the hottest the solar kiln will reach?
The definition of insanity is to do the same things over and over and expect a different result!

Offline pineywoods

  • Senior Member x2
  • *****
  • Posts: 4903
  • Age: 81
  • Location: Marion, Louisiana
  • Gender: Male
  • Engineering analysis-just sittin thinkin about it
Re: Solar kiln temps
« Reply #1 on: December 11, 2017, 08:14:34 PM »
Don't really know, but I have documented 180 deg F in mine. Used a chart recording thermometer. Be advised, my kiln is a bit different from most, and I do live in the deep south...I normally see 40 deg over ambient, even on cloudy days...
1995 Wood Mizer LT 40, Liquid cooled kawasaki,homebuilt hydraulics. Homebuilt solar dry kiln.  Woodmaster 718 planner, Kubota M4700 with homemade forks and winch, stihl  028, 029, Ms390
100k bd ft club

Offline GeneWengert-WoodDoc

  • Senior Member x2
  • *****
  • Posts: 2116
  • Location: Bishop, GA
  • Gender: Male
  • Author of "Sawing Hardwood Lumber"
    • Book on Sawing hardwood Lumber
Re: Solar kiln temps
« Reply #2 on: December 12, 2017, 12:56:55 AM »
If the wood is fairly wet, then the extra heat will be used for evaporating water.  So, a solar kiln will run maybe only 10-20 F hotter than outside.  This is good, as the energy is being used for drying.

If the wood is dry, the extra heat will not evaporate moisture as easily so the kiln temperature will reach 30-40 F above outside.  Any hotter means that solar input and the heat created is not being efficiently used for drying.  Probably there is a relative humidity issue, as with heat and low RH the woood has to dry.  Maybe, the vents are not open enough.
Gene - Author of articles in Sawmill & Woodlot and books: Drying Hardwood Lumber; VA Tech Solar Kiln; Sawing Edging & Trimming Hardwood Lumber. And more

 


Powered by EzPortal