I think bitter orange peel is dried solely to preserve it so it can be sold like a spice. Given the volatiles, probably not with heat. Even many home dehydrators have a "low heat" setting for things where you want to preserve aroma (though some only do high heat).
We could both be wrong but I agree with this. Without drying the orange peel it doesn't really have any shelf life. I'd think(my assumption here) that you'd preserve the most aromatic and flavor compounds by dehydrating with cool temps and low relative humidity.