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Solar Timber Kiln

 

Developed by
Garg H P  Professor
garghp@ces.iitd.ernet.in
Department/Centre
Center for Energy Studies

Description:
The first step in the drying of wood is to get rid of the loosely present water. This is immediately followed up by the elimination of bound water within a controlled environment of both the temperature and humidity. It is usually done to minimize any chances for the occurrence of either the cracks or strains during subsequent stages of its use. With Solar energy technologies gaining prominence for meeting a variety of enduse applications, solar timber kilns are also finding an increasing use. Amongst the customary wood drying options are the electrically operated and steam based kilns. Wood drying process passes through several stages, each of which is driven by some energy need. Thus in case of the solar kiln dryers, solar energy is used for initial warming up, moisture evaporation and also to overcome the kiln heat losses. The complete drying process takes place at medium temperatures ranging between 40-60C. Interestingly enough, a bare minimum quantum of energy is consumed to create the forced convection of the dry air.

Special Features
A modular prototype model with a capacity to dry upto about 2 cu.m. of timber was developed, which helped to reduce the moisture content from a high value of about 80% to a nominal value of 12%. Other key features are; Use of freely available solar energy, Definite scope for conventional fuel savings and Modularity of the system in tune with the volume to be dried.

Prospective Users:
Those engaged in the timber drying activities, more so in the off-grid locations will evince a ready interest in this technology use.

Keywords:
Solar Drying, Solar Kiln, Timber, Moisture, Timber seasoning kiln.

Type of Technology:
Process

For further informatiom, Please contact directly the faculty member/inventor under intimation to Managing Director, FITT,
sengupta@fitt.iitd.ernet.in.
 

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