Woodcellar drying issue

Our basement has an attached woodshed that is 3/4 buried in the ground, making it more a wood-cellar. It has concrete floor, cinder block sides, tin roof, northern side vents, and south facing window. An eastern door connects the basement to the wood-cellar (great in bad weather), and a 3x3 portal opposite gives outside access. I have not gotten a moisture gauge yet, but am sure the venting is inadequate based on last year. I do not put green wood in it, but would like to.

So far, I have re-drained the foundation, water-proofed all the exterior walls (perhaps not a good idea above ground), and probably still need to water-proof the floor. I was going to solarize the window, but am now thinking of putting a solar black box on the roof and converting this wood-cellar into something that drys like the Solar Kiln designed at Virginia Tech.

Any comments on how to efficiently track & dry wood to 20% moisture in a wood-cellar, and keep it that way?

Bill