Im just about over this stuff.
However a dryer pulls around 7 amps to run a fractional Hp motor.
You just need a heat source
This guy has a good set up but mentions in the article he does not get as much heat
Another one I found using hot water from a boiler to warm the air.
I would look hard at a counter flow heat exchange anyhow to strip heat off the moist exhaust air before I used the water to try and drive up the temperature higher
If you using heat from you home instead of waster process heat like the fuel gases from a boiler your going to want to get your moneys worth from the wood...
Some observations of the build
The heat exchange is too short, it should use the counter flow principle, and its not insulated on the outside to conserve what he it can strip off the boiler.
Is this is a very practical solution in winter....
Summer Meh...
A rocket stove heat source is a simple idea but for long burns like an hour drying cycle I would take a long look at both primary and secondary air control with a damper to really keep the heat at a level where your not going to scorch your clothing.
You still have left over process heat.
You could heat water for a another load in the washer or a shower
For the not familiar with the rocket stove....