[Gasification] Wood chunks

[Adam Carr, Renergy]

Does anyone out there have any information re. the amount of time/energy and techniques/equipment required to dry wood 'chunks' of ~ 60X60mm @ ~50% Moisture Content down to <20% MC?  Between 1 - 2 tonnes/hr.

We have a market for the higher grade heat that the gasifier will produce, so would prefer to utilise lower grade (~90C) heat from the engine water cooling jacket.

I envisage some sort of perforated/walking floor/fan arrangement, but have absolutely no idea how much energy/time would be required, or for that matter how much time would be needed to air dry the chunks at ambient. (under cover! - it has been raining a lot in Cornwall recently), or whether it might be an idea to air dry first and then use heat to finally get the chunks down to slightly below 20% MC?

Adam Carr
Renergy Ltd