ADDITIONAL SOURCES OF CHANGING SHRINKAGE RATES DURING KILN DRYING
作者:
James Fuller,
期刊:
Drying Technology
(Taylor Available online 2000)
卷期:
Volume 18,
issue 4-5
页码: 1023-1031
ISSN:0737-3937
年代: 2000
DOI:10.1080/07373930008917751
出版商: Taylor & Francis Group
关键词: Shrinkage;stress reduction;moisture content;automated dry kiln control;EMC
数据来源: Taylor
摘要:
This paper emphasizes the established need for a stress based kiln control system. It refers to I) the work which verified that the initial shrinkage rate changes within a board are the result of reduced stress levels and 2) the new statistical method short/long-term slope comparison method used to detect slope changes. The paper continues by giving the explanation for the additional shrinkage slope changes as the equilibrium moisture content changes during fan reversal and kiln schedule advancements. The kiln schedule advancements can cause both shrinkage and swelling. Reduced drying rate resulting in reduced shrinkage rate explains other changes. A stress based automated kiln control system is conceptually possible with 1) shrinkage rate changes understood and 2) a production useful statistical method to detect these changes.
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