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5. Wood industry
Mechanically ventilated hut dryers are very common in the wood industry, and include the following main types (figure 18 ):
one or two drying cells equipped with baffles (1) judiciously positioned to ensure correct air circulation and homogeneous drying;
one or more large-diameter helical fans (2) inside the dryer, blowing air over the entire height of the stacks perpendicular to the wood fibers;
an optional steam or water spray injection device. It is used for specific needs: humidification before drying of re-dried lumber with closed pores, surface humidification of lumber with defects when drying too quickly, generation of a very humid atmosphere at the start of drying...
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Bibliography
Heating element suppliers
ACIM JOUANIN S.A. [email protected]
CERHEC [email protected]
KANTHAL http://www.kanthal.com
RESCAL http://www.rescal.com
...Regulations
The Union technique de l'électricité (UTE) provides readers with collections of French, foreign and international standards, as well as reproductions of regulatory texts: both can also be purchased from the Association française de normalisation (AFNOR). In each country, the national standardization service can provide the same services.
Texts
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Standardization
- Installations électriques à haute tension : Règles - NF C 13-200 - 12-89
- High-voltage electrical installations – practical guide – determining conductor cross-sections and selecting protective devices - NF C 13-205 - 7-94
- Installations de branchement à basse tension : Règles - NF C 14-100 - 2-98
- Installations électriques à basse tension : Règles - NF C 15-100 - 12-02
- Installations électriques...
Electrical heating equipment market
2005 was marked by a sharp drop in the power ordered for thermal equipment, surpassing the increases of the previous two years: +6% between 2002 and 2003, +3% between 2003 and 2004, compared with -24% between 2004 and 2005.
Natural gas, which had grown significantly last year, with a 13-point gain in market share between 2004 and 2005, suffered the sharpest decline: -35% between...
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