Energy Required to Dry Wood
Author | : David P. Lowery |
Publisher | : |
Total Pages | : 8 |
Release | : 1973 |
Genre | : Lumber |
ISBN | : |
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Author | : David P. Lowery |
Publisher | : |
Total Pages | : 8 |
Release | : 1973 |
Genre | : Lumber |
ISBN | : |
Author | : Eugene M. Wengert |
Publisher | : |
Total Pages | : 8 |
Release | : 1974 |
Genre | : Kilns |
ISBN | : |
Author | : Joseph Denig |
Publisher | : |
Total Pages | : 148 |
Release | : 2000 |
Genre | : Lumber |
ISBN | : |
Drying Hardwood Lumber focuses on common methods for drying lumber of different thickness, with minimal drying defects, for high quality applications. This manual also includes predrying treatments that, when part of an overall quality-oriented drying system, reduce defects and improve drying quality, especially of oak lumber. Special attention is given to drying white wood, such as hard maple and ash, without sticker shadow or other discoloration. Several special drying methods, such as solar drying, are described, and proper techniques for storing dried lumber are discussed. Suggestions are provided for ways to economize on drying costs by reducing drying time and energy demands when feasible. Each chapter is accompanied by a list of references. Some references are cited in the chapter; others are listed as additional sources of information.
Author | : |
Publisher | : |
Total Pages | : 20 |
Release | : 2004 |
Genre | : Fuelwood |
ISBN | : |
The inadequate transportation infrastructure and undeveloped markets for sawmill residues in southeast Alaska are among the factors that limit the use of this forest resource. This study considers the potential use of sawmill residues to supply two bioenergy systems that would produce thermal energy for (1) community heating and (2) a lumber dry kiln in Hoonah, Alaska. The proposed community heating system would be a direct combustion system, burning approximately 1,450 green tons (1.315 green metric kilotons) of wood fuel per year to provide heating for seven centrally located buildings in Hoonah. Additional sawmill residues would be used in another system to provide process heat for a proposed 25,000 board foot (41.3 m3) dry kiln. The Hoonah sawmill typically produces as much as 5 million board feet (8,255 m3) of lumber per year, primarily from western hemlock and Sitka spruce. The processing of this amount of lumber would result in an adequate volume of residue to provide a fuel source for the heating requirements of the proposed projects. Wood residue from the sawmill is assumed to be available at no cost other than for transportation. Use of wood fuel for community heating would save an estimated 65,000 gallons (2.47 kL) of heating oil per year. Avoided fuel costs would be approximately $91,500 per year based on No. 2 fuel oil at a market price of $1.40 per gallon ($0.37 per liter). Based on a project life of 25 years and a contingency rate of 25%, the expected after-tax internal rate of return (IRR) for the community heating portion of the project is 29.6%. Total installed costs for the 1,195,000 Btu/h (350 kWthermal) community heating system, including distribution piping and its installation and backup oil systems, are estimated to be $631,000. For the lumber dry kiln, in the second heat-generating system, economic results were less favorable, with expected energy savings of $82,900 per year and an after-tax IRR of 24.1% (also assuming 25% contingency). Estimated installed cost of the 1,536,000 Btu/h (450 kWthermal) dry kiln system with a backup oil system is $513,800.
Author | : Patrick Perré |
Publisher | : |
Total Pages | : 366 |
Release | : 2007 |
Genre | : Lumber |
ISBN | : 9782907086127 |
Author | : R.B. Keey |
Publisher | : Springer Science & Business Media |
Total Pages | : 331 |
Release | : 2012-12-06 |
Genre | : Technology & Engineering |
ISBN | : 3642596533 |
At present, no single book adequately covers a basic understanding of wood book satisfies the need for such a work. It describes drying in practice. This the fundamental basis of kiln-drying technology, to enable forest companies to imFrove their drying operations as high-quality timbers become scarcer and of yesteryear can no longer be tolerated. Adaptive the wasteful practices is no longer good enough. Innovations change based on past experience of the material being dried and the processes require a sound understanding of drying. Newer techniques, such as the use of ultrahigh temperature sea soning and superheated steam under vacuum, require an even greater depth of physical understanding for these methods to be used effectively and economically. book provides a description of modern ideas about wood structure, This moisture movement and stress development, from which models of the drying process are developed to give the kiln operator important information about the course of drying under specified conditions, and thus a means is compared with practice wherever for rational process improvement. Theory possible.
Author | : Helmuth Resch |
Publisher | : |
Total Pages | : 84 |
Release | : 2009 |
Genre | : Drying |
ISBN | : 9780981787619 |
Author | : |
Publisher | : |
Total Pages | : 612 |
Release | : 1977 |
Genre | : Agriculture |
ISBN | : |
Set includes revised editions of some issues.
Author | : John L. Tschernitz |
Publisher | : |
Total Pages | : 84 |
Release | : 1986 |
Genre | : Lumber |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 94 |
Release | : 1977 |
Genre | : Lumber |
ISBN | : |