For a colony, at TL 9 ... FUSION is the answer. If you don't have water, you don't have a colony (drinking, farming, livestock, manufacturing), so "unrefined fuel" is FREE.
At TL 8, either vulnerable SOLAR, site specific available WIND/TIDE/GEOTHERMAL, or FISSION would seem to be the answer.
MHD only makes sense where HYDROCARBON fuel is readily available ... so if your planet has OIL ... or enough people to qualify as AG (for BIODEIESEL in mass production from the waste).
Just my free thoughts on the issue.
At TL 8, either vulnerable SOLAR, site specific available WIND/TIDE/GEOTHERMAL, or FISSION would seem to be the answer.
MHD only makes sense where HYDROCARBON fuel is readily available ... so if your planet has OIL ... or enough people to qualify as AG (for BIODEIESEL in mass production from the waste).
Just my free thoughts on the issue.