Review of Wood Drying Research in Brazil: 1984–2004

Abstract

In Brazil, research on wood drying has been more focused on applied aspects than on fundamentals ones, and results have been published almost exclusively in Brazilian journals. The study of lumber deformation under aggressive drying conditions resulted in methods to group species and to define kiln schedules. Relationship between moisture content and electrical resistivity was used to improve quality control of dried lumber as well automatic control of the kiln drying process. Conventional kiln drying is the most common method for industrial drying, but seasoning and solar drying were also studied. The biggest research effort was directed to improve the drying of eucalypt lumber.

Changing the calculated surface area of wood samples to define drying schedules for Eucalyptus clones

“…To achieve this performance, different methods for setting drying schedules for different species are reported in the literature (Carlsson andTinnsten 2002, Taghiyari et al 2014). These methods are based on the correlation of the wood behavior during drying in a conventional oven with the physical and mechanical properties of the wood and with the behavior of samples under different drying conditions (Jankowsky and Luiz 2006). Batista et al (2015) report that some researchers have to develop equipment and solve practical problems and tools, validate and improve research on a laboratory scale.…”

“…Drying schedules can be defined as a preset sequence, with relative air humidity content and temperature control, that should be applied to a timber load to dry the wood quickly and to ensure the quality of the material at the end of the process (Simpson 1991, Jankowsky andLuiz 2006). To shorten the time required for setting a drying schedule, Terazawa (1965) developed a method in a laboratory oven, improved over time with aid of other research, known as the "drastic drying".…”

Kiln drying behavior utilizing drying rate of lumber from six fast-growth plantation species in Costa Rica

“…Drying also increases the lumber's mechanical properties and resistance to biological degradation and improves its thermal, acoustic, and electrical isolation properties. [2,3] Adequately performing the drying process provides a final product with the appropriate characteristics. It is important to maintain good control of all of the stages of the process with the purpose of preventing the occurrence or increase in defects, [2,4] which not only lead to a reduction in the economic value of the lumber but also to a decrease in its properties.…”

“…There are many studies available on the behavior during kiln drying of different tropical timber species from natural forests, [3,12,13] but few involved research on the drying rate. The studies on the drying of lumber that comes from fast-growth forest plantations of native tropical-climate species are even more limited.…”

Guest Editorial: Role ofDrying Technologyin The Promotion of Global Drying R&D

“…Interested readers can refer to some of these papers for expert ideas in various domains of drying R&D. [3][4][5][6][7][8][9][10][11][12][13][14] As the journal enters its fourth decade of publication with an impressive ''impact factor'' of 1.62 for 2010, the editors look forward to another decade of valuable contributions that we can disseminate globally and contribute materially to enhance quality of living by conserving energy and reducing environmental impact of drying operations in a cost-effective manner.…”