Method and device for measuring and calculating heat leakage of intermediate joint of superconducting cable

Abstract

The invention relates to a method and device for measuring and calculating the heat leakage of the intermediate joint of a superconducting cable.Surface heat flux of an outer container is collected from the left side face to the right side face of the outer container in a low-temperature constant-temperature container along the outer circumference of the outer container in the axis direction of the outer container, and surface heat flux of the left side face and the right side face of the outer container is collected; from one end of a flexible heat insulation pipe to the other end of the flexible heat insulation pipe, the surface heat flux of the flexible heat insulation pipe is collected along the outer circumference of the flexible heat insulation pipe in the axis direction of the flexible heat insulation pipe; based on an outer container heat leakage calculation model, the total heat leakage of the intermediate joint of the superconducting cable is obtained; and the heat leakage amount of the heat insulation pipe is obtained based on a heat insulation pipe heat leakage amount calculation model. Measurement and calculation of the heat leakage of the outer container and the heat insulation pipe of the intermediate joint of the superconducting cable are achieved, the total heat leakage of the intermediate joint and the heat leakage of the heat insulation pipe of the superconducting cable are obtained, and data support is provided for manufacturing of the intermediate joint of the superconducting cable and the heat insulation pipe based on heat leakage data.

Description

technical field [0001] The invention relates to the technical field of detection of superconducting cable intermediate joints, and more particularly, to a method and device for measuring and calculating heat leakage of superconducting cable intermediate joints. Background technique [0002] High-temperature superconducting cables have the advantages of high transmission power, high current density, low loss and environmental friendliness. Triple-phase coaxial superconducting cable is a new type of superconducting cable. Compared with single-phase superconducting cable, it has obvious advantages: the use of superconducting tape is half less, the AC loss is smaller, and there is no stray magnetic field. In addition, because one three-phase coaxial cable has the function of three separate single-phase cables, and only one cryogenic container is required, it takes up less space. [0003] As a long-scale superconducting cable, the intermediate joint is a crucial and indispensabl...

AI Technical Summary

Problems solved by technology

The cable temperature measurement patented technology represented by the above-mentioned patents focuses on measuring the temperature of the cable, but does not involve the measurement of the heat transferred from the cable to the outside. For superconducting cables, the heat leakage from the cable body and its intermediate joints will cause liquid leakage. The change of nitrogen ambient temperature will affect the electrical characteristics of superconducting cables, so direct detection of heat leakage has important application value for the research and development of related technologies such as cooling system control and cryogenic constant temperature container design

[0007] In summary, in the existing technology, there are few studies on heat leakage measurement of superconducting cable intermediate joints, and this technical field is still in a blank stage

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