About: Evacuated Tube Transport   Sponge Permalink

An Entity of Type : owl:Thing, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

Air is permanently removed (evacuated with vacuum pumps) from two five foot (1.5 m) diameter tubes built along a travel route. Car-sized passenger/cargo capsules travel in the tubes on frictionless maglev. Airlocks at stations allow transfer without admitting air. Linear motors safely accelerate the capsules, for most of the trip they coast through the vacuum without using additional energy. Acceleration energy is recovered by using linear generators to decelerate the capsules. ETT is not pneumatic tube transport (PTT) commonly used at drive-up banks. ETT is claimed to be able to accomplish fifty times more transportation per kWh than electric cars or trains because travel occurs without air resistance or rolling resistance.

AttributesValues
rdfs:label
  • Evacuated Tube Transport
rdfs:comment
  • Air is permanently removed (evacuated with vacuum pumps) from two five foot (1.5 m) diameter tubes built along a travel route. Car-sized passenger/cargo capsules travel in the tubes on frictionless maglev. Airlocks at stations allow transfer without admitting air. Linear motors safely accelerate the capsules, for most of the trip they coast through the vacuum without using additional energy. Acceleration energy is recovered by using linear generators to decelerate the capsules. ETT is not pneumatic tube transport (PTT) commonly used at drive-up banks. ETT is claimed to be able to accomplish fifty times more transportation per kWh than electric cars or trains because travel occurs without air resistance or rolling resistance.
dcterms:subject
dbkwik:speedydelet...iPageUsesTemplate
Help
  • off
Page
  • Evacuated Tube Transport
substed
  • yes
Day
  • 30(xsd:integer)
Month
  • June
Timestamp
  • 20120630145334(xsd:double)
Year
  • 2012(xsd:integer)
abstract
  • Air is permanently removed (evacuated with vacuum pumps) from two five foot (1.5 m) diameter tubes built along a travel route. Car-sized passenger/cargo capsules travel in the tubes on frictionless maglev. Airlocks at stations allow transfer without admitting air. Linear motors safely accelerate the capsules, for most of the trip they coast through the vacuum without using additional energy. Acceleration energy is recovered by using linear generators to decelerate the capsules. ETT is not pneumatic tube transport (PTT) commonly used at drive-up banks. ETT is claimed to be able to accomplish fifty times more transportation per kWh than electric cars or trains because travel occurs without air resistance or rolling resistance. ETT is a form of Personal Rapid Transit (PRT), accordingly ETT may be networked like freeways, and the automobile sized capsules are automatically routed like internet traffic, so a capsule can exit at any desired branch. Proposed speeds are up to mph (km/h) for regional use and up to mph (km/h) for cross country and global travel. Empty ETT capsules weigh lb (kg) yet can accommodate six people or three pallets of cargo. Guideways to support ETT capsules require 1/20th the material needed to support trains due to the ultra light weight loadings. Material efficiency and automated production promise to drop cost to less than 1/10 that of High Speed Rail, or 1/4 that of freeways. Automated switching allows a mph (km/h) ETT route to exceed the capacity of a 32 lane freeway, producing further economy. The ETT technology is similar to a vactrain, but the PRT design philosophy is more similar to automobiles operating on a freeway, than to trains on a track. Vactrains can haul much larger loads than ETT, just like a train can haul bigger loads than a car. The cost of vactrain infrastructure is estimated to be more than an order of magnitude greater than ETT (just as trains at $50k/seat cost ten times more than cars at $5k/seat). One reason is because the ETT vehicle mass is two orders of magnitude less than a maglev train. Because of low cost, and point to point routing, ETT has the potential to serve individual residences and businesses.
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