Schematic illustration of the superconducting highway for energy transport and storage and superconductor levitation for the transport of people and goods.
CREDIT: Vakaliuk et al.
Revolutionary design could combine superconductor levitation, lossless electricity transmission, and liquid hydrogen transportation into one system.
Superconductors can conduct electricity without any resistance or power loss, and they can effortlessly cause magnets to levitate above them. These properties would make superconductors useful for high-speed trains or long-distance power transmission, except for one glaring problem: superconductors only work at low temperatures, more than a hundred degrees below zero.
This one requirement makes building a hyperefficient electrical grid or high-speed rail network very expensive. Unless, that is, a superconductor network could accomplish both tasks at the same time.
In APL Energy, by AIP Publishing, researchers from the University of Houston, Adelwitz Technologiezentrum GmbH, and the Leibniz Institute for Solid State and Materials Research developed a proof of concept for a superconducting highway that could transport vehicles and electricity, cooling the necessary superconductors with a pipeline of liquid hydrogen.
Most magnetic levitation designs feature the superconductor inside the vehicle, which is suspended above a magnetic track. The authors decided to flip that arrangement upside down, putting the superconductor on the ground and giving each vehicle a magnet. The result is a system with multiple uses, placing it within the realm of affordability.
“Superconductor-levitated magnetic vehicles, instead of magnet-levitated superconducting vehicles, can provide additional benefits such as electrical power transmission and storage,” said author Zhifeng Ren. “We developed a new superconducting system that can transport and store a huge amount of energy and also transport people and goods with speeds of at least 400 miles per hour.”
Their design solves the problem of superconductor cooling with a liquid hydrogen pipeline. Hydrogen is a promising clean fuel source with a complex handling issue: It is a gas at room temperature, so transporting and storing it involves either dangerous pressurized tanks or costly cryogenic temperatures. In the team’s proposal, the cost of cooling the superconductor and the cost of transporting hydrogen become the same.
Using a scale model in the lab, they demonstrated that these applications can coexist, and now they hope to build a full-scale demonstration. The authors envision their system would sit underneath existing highways to make use of current infrastructure.
“People can drive onto the superconducting highway any time without waiting for a train or airplane, and modifying the existing highways means there is no need to acquire land for the tracks,” said Ren. “With enough financial support, we could make a working system over a relatively short distance, like from Houston to Austin.”
Original Article: Transforming highways for high-speed travel and energy transport
More from: University of Houston | Leibniz Institute for Solid State and Materials Research
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