[Gasification] fasts trees

[Kevin Chisholm]

Dear Javier

The key thing is the "Mean Annual Increment." It is a measure of the new 
biomass added each year to the stem of the tree. In addition to the 
"stem wood, there is, of course, the branch wood. Very roughly, the 
branch wood volume is the same as the stem wood volume.

The Mean Annual Increment will vary greatly, depending on species, 
climate soil fertility, moisture, etc. What you need is "the mean annual 
increment for a selected species in a chosen area." Then you will be 
able to estimate teh wood available from a conventional forest system.

On teh other hand, if you had a hybrid species and did coppice wood 
harvesting, the annual biomass yield for fuel could be very much higher.

Hope this is a helpful overview.

Best wishes,

Kevin
Javier Bonet wrote:
> Dear gasification list.
> 
> if you want to produce a constant amount of wood biomass, from a
> forest, acording to your expiriences, what could be the best tree,
> time to harvest, and power amount, to achieve the maximun power per
> unit of land? lets supose cases for producing 20 kw, 100 kw, and 1 Mw
> of electric power.
> 
> Javier Bonet
> 
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