A device for cooling superconducting cables

Abstract

The invention provides a device for cooling a superconducting cable. The device comprises a superconducting energy pipeline, a base station cooler, a heat exchanger, an LNG immersed pump and a modulation device. A part of LNG in the superconducting energy pipeline is conveyed into the base station cooler to directly exchange heat with a power transmission terminal, so that the temperature of the power transmission terminal is maintained below the superconducting critical temperature; the temperature of the LNG subjected to heat exchange with the power transmission terminal rises to generate agas-liquid two-phase flow, and the gas-liquid two-phase flow enters the modulation device to be modulated into liquid and then, enters the LNG immersed pump; the LNG immersed pump conveys LNG to the heat exchanger for heat exchange; the heat exchanger reduces the temperature of the modulated LNG to be lower than the superconducting critical temperature; and then, the cooled LNG enters another power transmission terminal in the base station cooler for heat exchange; and the heat-exchanged LNG enters the superconducting energy pipeline, and the freezing point is reduced. According to the devicefor cooling the superconducting cable, LNG cold energy is fully utilized to make the temperature of the power transmission terminal maintained under the superconducting critical temperature, so that superconducting operation of the power transmission terminal is achieved.

Description

technical field [0001] The invention relates to the technical field of superconducting cables, in particular to a device for cooling superconducting cables. Background technique [0002] With the start of projects such as West-to-East Gas Transmission and West-to-East Electricity Transmission, the simultaneous transmission of gas and electricity has entered the field of vision of superconducting research. The use of natural gas liquefaction equipment can meet the requirements of superconducting power transmission at the same time, reduce the cost of superconducting power transmission, and improve natural gas transmission. Stability and security. [0003] The cooling system required for superconducting DC transmission cables, if liquefied natural gas (liquefaction temperature is 110K) or liquid hydrogen (liquefaction temperature is 27K) is used as the cooling medium, the integration of power transmission and gas transmission can be realized. This is because, on the one hand,...

AI Technical Summary

Problems solved by technology

[0005] As a relatively important link in the power transmission process, the power transmission terminal is a key link in the entire superconducting power transmission process to realize the superconducting operation of the power transmission terminal. However, the power transmission terminal is bulky and has a large heat load, making it difficult to maintain a low-temperature superconducting environment.

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