well done @kryzec, I reserve my comment till I see your analysis on why
re-pressurize the tube would be more than the energy required for maintaining the velocity of the N700 Series Shinkansen in Japan (fastest train in the world)
may be I will respond with a clear post then
I have a post up though I actually didn't look at the N700 Series. Even still, the energy to make a vacuum is immense and way more than the energy required to drive a maglev train the distance which would also make it to its destination in roughly the same time. Part 2 (of my analysis) will look at the actually energy costs of running the hyperloop after the air in the tube has been evacuated.