High temperature superconducting magnetic levitation low temperature working medium transportation pipeline structure

Abstract

The invention discloses a high-temperature superconductor magnetic levitation low-temperature working medium transport pipeline structure. The pipeline structure comprises an inner pipe, an outer pipe, superconductors, permanent magnets, memory alloy actuators and a vacuum cavity. In order to solve the problem that conduction heat leakage of a low-temperature working medium in the transportation process is serious, the superconductors are fixed to the inner pipe for transporting the low-temperature working medium, and the permanent magnets are arranged oppositely on the inner wall of the outerpipe; after the superconductors are cooled, the self-stabilization uncontrolled magnetic levitation effect is achieved between the superconductors and the permanent magnets, and the transport pipeline is suspended and isolated; meanwhile, the vacuum cavity is formed between the inner pipe and the outer pipe, so that conduction and convection heat leakage of the transport pipeline is reduced to the maximum extent. Before transportation of the low-temperature working medium, the memory alloy actuators are used for mechanical supports between the inner pipe and the outer pipe, and the superconductors achieves the superconductive effect through conduction cooling during transportation. When the actuators reach the phase-transition temperature, memory alloys shrink, mechanical supporting of the actuators between the inner pipe and the outer pipe is turned into high-temperature superconductor magnetic levitation supporting, and the conduction heat leakage between the inner pipe and the outer pipe is isolated, so that the transport pipeline structure goes into a low-heat-leakage working state.

Description

technical field [0001] The invention relates to the field of cryogenic working medium pipeline transportation. Background technique [0002] During the transportation and use of cryogenic working fluids (such as liquid hydrogen), the problem of heat leakage is the main obstacle restricting its large-scale application. The gasification of liquid hydrogen caused by heat leakage will increase the pressure in the pipeline, which will easily cause safety hazards. Therefore, heat leakage is a key problem that must be further solved in the application of liquid hydrogen. Vacuum insulated pipes have good heat insulation effect and save space, and are the main way of heat insulation and cold preservation. However, the inevitable mechanical support between the inner and outer pipes will lead to conductive heat leakage, especially for long-distance transportation or transportation with extremely low space loss. The impact of heat leakage through support conduction will become more and...

AI Technical Summary

Problems solved by technology

[0002] During the transportation and use of cryogenic working fluids (such as liquid hydrogen), the problem of heat leakage is the main obstacle restricting its large-scale application

The gasification of liquid hydrogen caused by heat leakage will increase the pressure in the pipeline, which will easily cause safety hazards. Therefore, heat leakage is a key problem that must be further solved in the application of liquid hydrogen

Vacuum insulated pipes have good heat insulation effect and save space, and are the main way of heat insulation and cold preservation. However, the inevitable mechanical support between the inner and outer pipes will lead to conductive heat leakage, especially for long-distance transportation or transportation with extremely low space loss. The impact of heat leakage from support conduction will become more and more serious. It is estimated that it accounts for more than 50% of the cold loss of the entire inner and outer pipes, and becomes the main factor limiting the structural efficiency of cryogenic working medium pipes

Images