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Drying and thermal modification (5 cr)

Code: AT00BZ11-3003

General information


21.11.2022 - 08.01.2023


08.03.2023 - 26.04.2023

Number of ECTS credits allocated

5 op

Virtual portion

1 op

Mode of delivery

80 % Contact teaching, 20 % Distance learning


Faculty of Technology (LAB)


Lahti Campus

Teaching languages

  • Finnish

Degree programmes

  • Bachelor’s Degree Programme in Wood Technology


  • Ilkka Tarvainen

Scheduling groups

  • Luennot (Size: 0. Open UAS: 0.)



Small groups

  • Luennot 1

Learning outcomes

The student is able to:
- basics of wood drying
- Industrial wood drying and its processes
- firewood and its manufacturing process
- basic wood drying invoices
- targets for wood drying in different applications
- other methods of drying wood, drying defects

Implementation and methods of teaching

Student will learn:

- basics of wood drying
- basics of thermowood process
- wood drying defects
- testing of dried and thermowood handled products
- possible laboratory works: kiln drying/thermowood handling
- possible company visit to Sawmill (drying process)

Timing and attendance


Learning material and recommended literature

- Sawmill Industry - Handbook. Varis 2017.
- ePUB: Sawmill Industry - Handbook
- The basics of wood drying, Valutech (Tom Moren)
- Thermowood Handbook
- lectures in Moodle course
- Laboratory work Instructions

Exam retakes

To be agreed with the course teacher

Learning environment

- Moodle implementation
- The laboratory exercises of the course are done in a wood laboratory

Student time use and work load

- The course is evenly loaded for an average of 8 weeks
- Extent of the course 5 cr. equivalent to about 5 x 27 hours of student work


The course covers the following topics:
- wood drying basics repetition
- Industrial wood drying and processes
- Thermowood and its manufacturing process
- wood drying calculations
- practical examples of drying in different applications
- other methods of drying wood, drying defects
- drying practice in industry
- laboratory exercises (report + seminar presentation)

Additional information for students: previous knowledge etc.

- Forest and wood raw material
- Wood structure and properties
- Sawn timber production and processes

Assessment criteria

- passed examinations - average of examinations more than 50%
- approved weekly exercises
- approved assignments (report + seminar presentation)

Assessment scale