[jacquesm]

I'm sorry but that does not sound feasible. Large scale forest fires are accidents and not energy generation stations. The logistics would be prohibitive and absent any forest fires (usually considered a good thing) you'd be babysitting a pile of rust. Also, the heat produced by a forest fire would handily destroy your equipment.

Forest fires at scale tend to be pretty much unmanageable, people are more than happy just to put them out without having to think about extracting energy from them.

10 points for out of the box thinking, minus several for a lack of feasibility. But keep at it, maybe one day you'll hit the jackpot!