Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Solar-heated, forced-air, lumber dryer for tropical latitudes

Source: Solar Energy Volume 22, 1979; pp. 563-566.

Author(s): Tschernitz, John L.; Simpson, William T.

Publication Year: 1979  View PDF »

Category: Journal Articles

Abstract: Lumber to be used for most wood products requires drying before it can be manufactured into a stable finished product that will perform satisfactorily. There are two general methods of drying lumber: air drying and kiln drying. In air drying, lumber is merely stacked in the open (or occasionally in sheds) in such a way as to assure natural air circulation through the stacks. This method is slow (low temperature) and offers no control over temperature and relative humidity. This uncontrolled drying often causes cracking and distortion in the lumber if relative humidities are too low in the early stages of drying. In those stages, wood is most susceptible to damage due to the stresses (wood shrinks on drying) caused by severe moisture gradients from core to shell. Furthermore, particularly in areas where ambient relative humidity is high, wood cannot be brought to a low enough moisture content by air drying alone, because of the hygroscopicity of wood.

Keywords: solar; forced-air; lumber dryer; tropical latitudes

Publication Review Process: Non-Refereed (Other)

File size: 733 kb(s)

Date posted: 04/29/2013
RITS Product ID: 63744

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »