Course code MatZ3060

Credit points 7.50

Hydrothermical Processing of Wood

Total Hours in Course200

Number of hours for lectures48

Number of hours for seminars and practical classes32

Independent study hours120

Date of course confirmation08.11.2016

Responsible UnitInstitute of Civil Engineering and Wood Processing

Course developer

author reserch

Edgars Bukšāns

Dr. sc. ing.

Prior knowledge

Fizi2013, Physics

Mate1035, Mathematics II

Mate4016, Mathematics I

Meha4014, Applied Mechanics

MatZ2036, Wood Science

Replaced courses

Ener2002 [GENR2002] Heat Engineering and Supply

MatZ3043 [GMTR3043] Hydrothermal Processing of Wood

MatZB014 [GMTRB014] Hydrothermical Processing of Wood

Course abstract

Study of theoretical principles of the system wood-water and wood moisture content measurement methods. Study of wood drying methods and technology. Study of drying agent physical parameters changes and technological process calculations in wood drying process. Study of wood drying quality evaluation methods.Fundamentals of heat supply systems in wood processing industry.

Learning outcomes and their assessment

Knowledge about wood and different wood products drying theory and technology – discussions at lectures, essay and presentation, tests and examination.
• Skills to define and analyse questions regarding wood drying process, manage wood drying process in wood processing companies and evaluate drying quality - discussions at lectures, practical work and solving tasks, tests and examination.
• Competence to evaluate, analyse and develop wood drying technology in wood processing companies - practical work, solving tasks and calculations, laboratory works, tests and examination

Course Content(Calendar)

Lectures:
1 Moisture of wood and its determination – 3h.
2 Shrinking and swelling form changes – 2h.
3 Drying agents, their characteristics and physical properties. Diagram I-d – 4h.
4 Basic principles and methods of making wood drying modes – 4h.
5 Factors affecting wood drying. Methods for calculating drying time – 2h.
6 Heat transfer theory in wood drying – 2h.
7 Review of various wood drying technologies. Natural and artificial drying – 4h.
8 Basic technological principles of convection-type wood drying methods – 4h.
9 Wood products as fuel for energy supply – 2h.
10 Basics of Heat Engineering. Power supply systems – 2h.
11 Evaluation of Drying Quality and Indicators. EDG Guidelines. European standards – 4h.
12 Simplified Design Methods for Dryers. Methodology for Calculating Drying Costs – 4h.
13 Drying technology for veneer – 2h.
14 Wood impregnation technologies – 3h.
15 Thermal treatment of wood – 2h.
16 Wood modification methods using hydrothermal processes – 4h.
Practical work:
1 determination of wood moisture content and its calculations methods – 4h.
2 wood density and basic density calculations – 4h.
3 I-d and EMC diagrams and solving tasks with drying agent parameters – 8h.
4 preparation of drying schedules – 4h.
5 calculation of wood drying times according different methods – 4h.
6 modelling of drying processes – 4h.
7 heat engineering calculations – 2h.
8 aerodynamic calculations – 2h.

Requirements for awarding credit points

Assessment of learning outcomes is done by examination or accumulative exam.
1)In order for the student to be admitted to the examination, an essay must be written and successfully defended.
2)Student can receive accumulative exam by fulfilling following criteria:
•successfully written 4 tests;
•an essay on a topic of wood hydrothermal processing in accordance with the instructions of the lecturer of the study course has be elaborated and defended;
•average grade of 4 tests and the essay must be at least 7 points

Description of the organization and tasks of students’ independent work

1.Independant studies of additional study materials available at e-learning platform for deeper understanding of study topics. Work organised according according to lectures topics.
2. Deeper investigation of some topic related with wood hydrothermal processing according to individually received work task. Overview of work results should be presented to auditorium.

Criteria for Evaluating Learning Outcomes

•Examination – 100% or
•Accumulative examination – 100%.

Compulsory reading

1. Bukšāns E., Koksnes hidrotermiskā apstrāde, Lekciju kurss, 2016. – 141 lpp.
2. Kokins L., Staprāns J. Koksnes hidrotermiskā apstrāde un konservēšana - R: Zvaigzne, 1984. - 221 lpp.

Further reading

. Miķītis Ē., Upmanis K. Koksnes žāvēšana. - R.: Liesma, 1971. - 288 lpp.
2. Bowyer L., Shmulsky R., Haygreen J.G. Forest Products and Wood Science. An Introduction. 4th edition. Ames; Iowa: Iowa State Press, 2003. 554 p.
3. Handbook of wood chemistry and wood composites. Ed. R.M. Rowell. Boca Raton: Taylor&Francis, 2005. 487 p.
4. Стерлин Д.М. Сушка в производстве фанеры и древесностружечных плит. - Москва: Лесная промышленность, 1977.
5. Janik W. Handbuch der Holztrocknung. - Leipzig: VEB Fachbuchverlag, 1965. - S 221.
6. Справочник по сушке древесины. - Москва: Лесная промышленность, 1990. - 204 стр.
7. Шубин Г.С. Проектирование установок для гидротермической обработки древесины. - Москва: Лесная
промышленность, 1983. - 272 стр.
8. Серговский П.С., Расев А.И. Гидротермическая обработка и консервирование древесины. - Москва: Лесная
промышленность, 1987. - 353 стр.

Periodicals and other sources

1. Starptautiskais žurnāls "Baltijas Koks". ISSN 1407-6667.
2. Starptautiskais žurnāls "Forest Products Journal". Online ISSN: 0015-7473
3. http://www.timberdry.net (portāls par koksnes žāvēšanu).

Notes

The study course is included in the compulsory part of the professional higher education study program Wood Processing realized by Forest Faculty