Well, initially the idea was to get 25MW out of a FoFu by running it at much higher Hertz. I think 330Hz –> 5MW was decided pro tem to be the best balance of useful power and feasible cooling given current tech. But there will always be the same ratio of heat waste to electricity generated, more or less, so running slower would just mean using more generators to get the desired output, with the same total heat waste. What would be gained?
