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2. Definitions, drying objectives and competing techniques
2.1 Definitions and objectives
For the purposes of this presentation, the product is assumed to be made up of two components:
Dry matter is considered to be non-volatile, unlike the solvent (water), even if in reality other volatile molecules than the water to be dried may also escape in the form of vapor (loss of aromas, release of odors, volatile organic compounds or VOCs...), which will be neglected here in terms of mass and energy. When separation is based on the differential volatility of components, the operation is more akin to distillation. Dry matter is generally the most valuable fraction of the product, although in certain cases (e.g. organic solvents, odors, etc.) the solvent may also be recovered.
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Unit operations. Chemical reaction engineering
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Definitions, drying objectives and competing techniques
Bibliography
Reviews
Journals dealing with the drying unit operation, independently of the product:
Chemical Engineering Science ;
Chemical Engineering Processing ;
Drying Technology Journal ;
International Journal of Thermal Science ;
Journal of Heat and Mass Transfer...
Software tools
Collection of psychrometry software http://www.linric.com
Online psychrometric calculation http://www.psychro.com
Commercial "Dryer 3 000" software [Windows, MacOSX or Unix/Linux], for calculating cereal tower dryers, by simulation using...
Events
IDS Congress: International Drying Symposium (number of the year)
International congress dedicated to drying. It takes place every two years, in a different host country. The proceedings of each congress are available for consultation.
Directory
AFSIA: French Drying Association for Industry and Agriculture
It brings together applied drying research centers, researchers and manufacturers in France. Its headquarters can change (in 2008, INSA Lyon). It organizes or participates in conferences, and produces its own publications (AFSIA publications).
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