HIGH-SPEED TRANSPORTATION INTO THE FUTURE
Vacuum using steam.pdf
The energy consumption of Hyperloop is greatly reduced by running in a near-vacuum.
Energy is required to evacuate the tube initially, and maintain it, the use of steam in the tube rather than air greatly reduces the pumping energy.
Vacuum pumping energy
is greatly reduced, because the steam only needs to be pumped to a low-pressure condenser
The Natural Steam Vacuum
is a very low energy solution for 3kPa pressure
affects the speed and energy of Hyperloop operations
Vacuum pumps are required
, to evacuate the tube initially, and to pump down the airlocks. A large number of pumps are required, but the overall energy is acceptable.
The pump-down energy cost
is quite low, it is paid back within the first day of operation, because Hyperloop is low energy compared to high-speed-rail.
The vacuum, inital evacuation and maintenance
Cost of vacuum.pdf