Drying Wood with High Frequency Electric Current by Helmuth Resch
This monograph aims at providing understanding of the many ways to employ
special drying methods using high frequency electric currents for wood and
wood products. It offers a broad coverage of research and development over
many decades from the original concept to industrial applications. The
physical process of dielectric heating has advantages of rapid and
relatively uniform heat transfer, resulting in high drying rates and
avoidance of various drying defects, including any significant casehardening
and oxidative discoloration of wood. Heat transfer to and evaporation of
moisture from wood is shown in dependence on the dielectric properties of
materials. Because wood is heterogeneous, these properties vary not only
with the frequency of the current and the field orientation, but also with
the moisture content, temperature, and density of wood. Considering these
parameters and the specific heat of the material, the selection of a
frequency can be made for heating specific products and the power absorption
and feasibility of a system can be estimated. The text traces the historical
roots of using high frequency current for heating and drying of wood.
Principles of and formulas describing dielectric heating and the dielectric
properties of wood give a background useful for understanding parameters of
specific applications, energy transfer, and power consumption. Early
equipment development for continuous and batch dryers using radio
frequencies and microwaves is reported from work in Russia, USA, Canada,
Japan, and Europe. The greatest emphasis is placed on the method of
combining radio frequency heating with vacuum drying. Research during the
last decades lead to industrial installations designed mainly for drying of
lumber and timbers in vacuum kilns. This development provided a positive
picture for higher value products. On the other hand, the continuation of
research with microwaves promises to make use of their unique properties.
Some ideas are advanced on achieving rapid and economic drying by combining
other heat transfer methods with high frequency heating along production
lines. Finally, the present understanding of the drying mechanism, the
technical feasibility, and economics are considered. A broad listing of
relevant literature provides the reader with a multitude of references. Data
are presented in international and American units.
University of Natural Resources and Applied Life Sciences, Vienna, Austria
Society of Wood Science and Technology, Madison, Wisconsin, USA ISBN
978-0-9817876-1-9
Cost: $30 + postage (Check payable to SWST; Visa, Mastercard)
Order from: Order online at <http://www.swst.org/reschBook.html>
http://www.swst.org/reschBook.html or from SWST, One Gifford Pinchot Drive,
Madison, WI 53726; email: <mailto:vicki@swst.org> vicki(a)swst.org Phone:
608-231-9347; Fax: 608-231-9592
Name: _____________________________ Address:
_____________________________________
Address:
_________________________________________________________________________
Email:___________________________________________ Phone/Fax:
_______________________
Credit Card # _____________________ Expiration Date ________________ Total $
_________
Signature: _______________________________________________
Dave Cown,
Senior Scientist, Wood Quality
Coordinator, IUFRO Division 5 (Forest Products)
Scion (Trading name of Forest Research Institute Ltd.)
Private Bag 3020
49 Sala St. Rotorua
New Zealand
Ph: +64 7343 5525
Mobile: 021 187 4022
Fx: +64 7343 5507
www.scionresearch.com
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Message circulated on behalf of Dave Cown by Brigitte Burger, IUFRO
Headquarters
(See attached file: EFORWOOD Programme_final.pdf)
Dave Cown,
Senior Scientist, Wood Quality
Coordinator, IUFRO Division 5 (Forest Products)
Scion (Trading name of Forest Research Institute Ltd.)
Private Bag 3020
49 Sala St. Rotorua
New Zealand
Ph: +64 7343 5525
Mobile: 021 187 4022
Fx: +64 7343 5507
www.scionresearch.com
The Pan-American Regional Group of IAWA (Fidel Roig, Mendoza, Argentina;
Veronica Angalossy, Sao Paulo, Brazil; Teresa Terrazas, Mexico City,
Mexico; Barbara Lachenbruch, Corvallis, Oregon, USA; Regis B. Miller,
Madison, Wisconsin, USA), the International Academy of Wood Science (IAWS),
and Division 5.01 (Wood Quality) of IUFRO are organizing a joint meeting in
Madison, Wisconsin, USA for June 23 - 26, 2010. The meeting will be held
at the Memorial Union on the campus of the University of Wisconsin-Madison.
In the fall IAWA mailing, we will include a notice of the meeting including
more details about registration, accommodations, tours, etc. If you are
interested in attending, send an email message to Regis B. Miller (
rmiller1(a)wisc.edu) so that future information can be quickly distributed
via email. You can check the IAWA or IAWS websites at
http://www.iawa-website.org/ or http://www.iaws.uhp-nancy.fr/ for updates.
The conference will include all aspects of wood science from wood anatomy,
forest products, wood identification and wood quality to wood formation,
xylem physiology, tree ring analysis, and paleobotany. All members,
prospective members and guests are welcome.
Start thinking about your abstract. We will begin accepting abstracts in
October 2009.
LOCAL INFORMATION: For information about the local area check the
following:
Madison, Wisconsin: http://www.cityofmadison.com/
University of Wisconsin-Madison: http://www.wisc.edu/
Memorial Union: https://www.union.wisc.edu/index.asp.
CONTACT:
Dr. Regis B. Miller, Executive Secretary of IAWA
USDA Forest Service, Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398, USA
Phone: 608-231-9341 — FAX: 608-231-9508 — Email: rmiller1(a)wisc.edu
Dave Cown,
Senior Scientist, Wood Quality
Coordinator, IUFRO Division 5 (Forest Products)
Scion (Trading name of Forest Research Institute Ltd.)
Private Bag 3020
49 Sala St. Rotorua
New Zealand
Ph: +64 7343 5525
Mobile: 021 187 4022
Fx: +64 7343 5507
www.scionresearch.com
Dear D5 List Members
I wish to inform you of an upcoming meeting organised by the Asia Pacific
Association of Forest Research Institutes (APAFRI).
"Asia and the Pacific Forest Products Workshop – Green Technology for
Climate Change Mitigation and Adaptation",
14-16 December 2009, Colombo, Sri Lanka
Climate change is a global problem, with global causes and effects. Climate
change affects the basic elements of life for people around the world –
access to water, food production, health, and the environment. Hundreds of
millions of people would suffer from hunger, water shortages, and more
frequent severe natural disasters such as droughts, typhoons and floods, as
the climate changes. Addressing climate change and dealing with the
impacts that cannot be avoided now, requires urgent efforts by all. Actions
will require commitments and responsibilities to invest in capacity and
capability building to mitigate and adapt to climate change.
Programme
The workshop will focus on two broad topics: energy reduction and carbon
emission reduction – the two main objectives of green technologies. The
programme of the workshop will have two main sessions: green technologies
in manufacturing and green products development.
Green technologies in manufacturing
· Wood waste reduction in wood processing
· Volatile Organic Compound-free adhesives and coatings technologies
· Recyclable packing technologies
· Energy reduction in wood processing
· Process and material optimization
Green products development
· Chain-of-Custody Certification and Life-Cycle-Assessment – Impetus
for green products development
· New environmentally friendly products from the composite/panel
industry
· Challenges for environmentally friendly products
· Biofuels
The working language of the workshop will be English.
If you wish to present a paper, or exhibit a poster, send your abstract of
300–500 words to Sim HeokChoh (simhc(a)frim.gov.my; sim(a)apafri.org)
Abstracts should include the full names, addresses of authors, and e-mail
address for the corresponding author.
Deadlines: Submissions of abstracts – 15 September
Notification of acceptance – 30 September
Final Papers/Presentations – 15 November
Venue
Colombo, Sri Lanka
Sources of Funding
Participants should seek their own resources to attend the workshop.
Efforts are being made to mobilize resources to support a limited number of
invited participants, especially from developing countries in Asia and the
Pacific. Those who are interested in participating in the workshop, but do
not have their own funding, are still encouraged to register. The workshop
organizers will attempt to provide partial support.
Organization
The workshop is an initiative of the International Union of Forest Research
Organization (IUFRO). It is being organized by the Asia-Pacific Association
of Forest Research Institutions (APAFRI) in technical collaboration with
the Food and Agriculture Organization of the United Nations (FAO), Sri
Lanka Forest Department, Forest Research Institute Malaysia (FRIM), and the
Korea Forest Research Institute (KFRI).
Registration
The deadline for registrations for the workshop is 15 November 2009.
Contact for Enquiries
Sim Heok-Choh
Asia Pacific Association of Forestry Research Institutions
c/o Forest Research Institute Malaysia
Kepong 52109 Kepong
Selangor, Malaysia
Fax: 60 3 6277 3249 E-mail: simhc(a)frim.gov.my
Dave Cown,
Senior Scientist, Wood Quality
Coordinator, IUFRO Division 5 (Forest Products)
Scion (Trading name of Forest Research Institute Ltd.)
Private Bag 3020
49 Sala St. Rotorua
New Zealand
Ph: +64 7343 5525
Mobile: 021 187 4022
Fx: +64 7343 5507
www.scionresearch.com
Dear D5 list members
I am seeking input about D5 activities for my annual Coordinator report. I
find it difficult to keep up with all Working Group activities, so there
may be significant events of which I am unaware. Please let me know if you
think there is an item worth mentioning in my report.
Also, I would like to be pro-active in identifying officeholders who may be
considering relinquishing their duties in 2011 at Congress time, and also
seeking nominations for the positions which will become available then.
There will be opportunities for interested scientists to join the D5.00
team. Nominations will be considered at the 2010 Board meeting in Buenos
Aires, so please let me know if anyone is interested and available as soon
as possible.
Dave Cown,
Senior Scientist, Wood Quality
Coordinator, IUFRO Division 5 (Forest Products)
Scion (Trading name of Forest Research Institute Ltd.)
Private Bag 3020
49 Sala St. Rotorua
New Zealand
Ph: +64 7343 5525
Mobile: 021 187 4022
Fx: +64 7343 5507
www.scionresearch.com
Dear Mailing List Members:
As at past IUFRO World Congresses, there will be the opportunity to honour
special scientific performances and achievements with selected IUFRO Awards
in the Seoul Congress in 2010.
If you know scientists doing outstanding forest research, nominate them for
one of the IUFRO Awards and give them the opportunity to travel to and
participate in the Congress as well as the chance to present their research
to the Congress participants.
Choose among the Scientific Achievement Award (SAA), Outstanding Doctoral
Research Award (ODRA) and the IUFRO Student Award (ISA) and make your
nomination soon. Bear in mind that you can only nominate candidates from
IUFRO Member Organizations, - no self-nominations are accepted - and that
the deadline for submission is 31 July 2009.
Find more information and nomination forms on our website
http://www.iufro.org/discover/awards/ and send your nominations to the Chair
of the IUFRO Honours & Awards Committee (Dr. Su See Lee, leess(a)frim.gov.my)
with copy to the IUFRO Executive Director (Dr. Peter Mayer,
office(a)iufro.org)
Dr. Su See Lee
Chair of the IUFRO H&A Committee
============================
IUFRO AWARDS at the IUFRO World Congress 2010
Scientific Achievement Award (SAA)
Up to 10 awards to recognize distinguished individual scientific
achievements within the fields of research covered by IUFRO. Criteria for
judgment will be dissemination of results, implementation of knowledge,
methods or techniques in practical forestry and skilled research management
(success in publications, meetings, funding, etc. in a larger group than the
individual) and involvement in IUFRO activities.
Outstanding Doctoral Research Award (ODRA)
One award per IUFRO Division to recognize outstanding individual scientific
achievements among young Doctoral researchers and to encourage further work
within the fields of research covered by the Union.
IUFRO Student Award (ISA)
One award per IUFRO Division to recognise outstanding individual
achievements in forest science made by Masters degree students (or
equivalent), and to encourage their further work within the fields of
research covered by the Union. Nominations can be made through IUFRO member
organizations or officeholders and through members of the International
Forestry Students Association (IFSA).
Furthermore, the Congress will also offer
Best Poster Award (BPA)
To encourage public dissemination of high quality research and to recognize
distinguished poster presentations by young scientists during the IUFRO
World Congress.
and IUFRO World Congress Host Scientific Award
Honors a truly outstanding scientist from the Congress host
country/countries who has elevated the profile of forest science and
research accomplishments.
-----------------------------------------------------------------
International Union of Forest Research Organizations
IUFRO Headquarters - Secretariat
c/o BFW Mariabrunn, Hauptstrasse 7 │ 1140 Vienna, Austria
Tel: +43-1-877 0151 0 │ Fax: +43-1-877 0151 50
Website: <http://www.iufro.org/> www.iufro.org │ E-mail:
office(AT)iufro.org
Hi there,
Good Day. I created a website for my Research Group for Industrial Ecology,
LCA and Systems Sustainability at the University of Maine for the purpose of
attracting good students and potential collaborators in my research program.
The website address is <http://ielcass.tripod.com/ilss/>
http://ielcass.tripod.com/ilss/ .
Please forward this to anyone or any group that might be interested in our
life cycle sustainability works in wood and non-wood products, pulp and
paper, forest-based carbon and ecosystem services. If they have website, I
would like to request them to include this site in the "Related Links"
section.
Thanks,
Anthony
Anthony Halog, PhD, MBA
Certified Life Cycle Assessment Professional
Assistant Professor of Industrial Ecology and Life Cycle Assessment
School of Forest Resources
College of Natural Sciences, Forestry and Agriculture
University of Maine, 5755 Nutting Hall
Orono, Maine 04469-5775
Tel: +1-207-581-2944
Fax: +1-207-581-2875
Email: anthony.halog(a)maine.edu
Website: http://ielcass.tripod.com/ilss/
2009 SWST International
Annual Convention
Wednesday, June 24, 2009
Laurel Room at the Doubletree Hotel Boise-Riverside
Boise, Idaho, USA
In Cooperation with Forest Products Society
Topic: The Role of Wood in our Green Future
7:30-8:00 a.m. Registration and Coffee
7:30-9:30 a.m. Student Poster Competition (Juniper Room)
8:00-8:30 a.m. Opening Remarks and Introductions
Jim Funck and Jerry Winandy
8:30-9:15 a.m. Biomaterials Consumption and Our Ecological Footprint -
A Sobering Comparison - Jim L. Bowyer, Director, Responsible
Materials Program, Dovetail Partners, Inc., and Professor Emeritus,
University of Minnesota, Department of Bioproducts and Biosystems
Engineering, Minneapolis, MN
9:15-10:00 a.m. Wildfires and Insects Threaten Future Timber Supplies and
Our Climate - Thomas Bonnicksen, PhD, Professor Emeritus, Texas
A&M University, College Station and Visiting Scholar, The Forest
Foundation, Auburn, CA
10:00-10:15 a.m. Break
10:15-11:00 a.m. Forest Certification - What It Really Means - Cassie
Phillips,
Vice President, Sustainable Forestry, Weyerhaeuser Company,
Federal Way, WA
11:00-11:45 a.m. Materials Are Green Only in Relationship to Each Other -
LEED/USGBC Issues - Jeff Howe, CEO of Fullerton Companies and
Chairman of the Board, Dovetail Partners, Inc., Minneapolis, MN
11:45 a.m.-1:30 p.m. Lunch and Annual Business Meeting
1:30-2:15 p.m. Life Cycle Analysis of the Forest Products Industry -
No Longer an Option - Bruce Lippke, Professor and Director,
College of Forest Resources, University of Washington, Seattle, and
President, CORRIM
2:15-3:00 p.m. Why Efficient Manufacturing Is the Essence of Sustainability
-
Rick Fisch, Director, Innovation and Productivity Center, Northwest Food
Processors Association, Portland, OR
3:00 p.m. Closing Remarks
Jim Funck
3:00-6:00 p.m. Poster Session/Cash Bar (Juniper Room)
CORRIM
Dave Cown,
Senior Scientist, Wood Quality
Coordinator, IUFRO Division 5 (Forest Products)
Scion (Trading name of Forest Research Institute Ltd.)
Private Bag 3020
49 Sala St. Rotorua
New Zealand
Ph: +64 7343 5525
Mobile: 021 187 4022
Fx: +64 7343 5507
<http://www.scionresearch.com> www.scionresearch.com
--------------------------------------------------
sent by Brigitte Burger, IUFRO Headquarters, on behalf of Dave Cown, IUFRO
Division 5 Coordinator
Dear IUFRO Colleague,
The 2009 IUFRO 3.08 Small-Scale Forestry Symposium, "Seeing the Forest Beyond the Trees: New possibilities and expectations for products and services from small-scale forestry" will be held June 7-11, 2009 in Morgantown, WV, USA. Attached is a list of the presentations slated for the symposium.
The topics include environmental services, bioenergy, landowner typology, fire, policy, timber and nontimber forest products, agroforestry, education and communications, and economics--all concerning small-scale landholders.
To find out more or to register for this symposium, visit our website at: http://ssf09.com.
I hope you can join us in June!
Best regards,
Dave McGill, Chair
Organizing Committee
David W. McGill, Ph.D.
Forestry Extension Specialist
West Virginia University
Appalachian Hardwood Center
PO Box 6125
Morgantown, WV 26506-6125
Ph: 304-293-5930
FAX: 304-293-2441
Email: dmcgill(a)wvu.edu
