Design method for combined energy pipeline of liquefied shale gas, liquid nitrogen and superconducting cable

Abstract

The invention discloses a design method for a combined energy pipeline of liquefied shale gas, liquid nitrogen and a superconducting cable. According to the method, three operation limiting conditions, namely the maximum allowable pressure drop, the maximum allowable temperature rise and the maximum allowable vacuum degree change rate, inside the combined energy transferring pipeline are met, so that the problem that the vacuum maintenance time is excessively short due to unreasonable design of a vacuum or heat insulation structure or potential safety hazards are generated due to excessively-severe heat leakage of the pipeline is avoided. Meanwhile, a liquid nitrogen transferring pipeline is directly arranged in a liquefied shale gas transferring pipeline, development cost of the whole combined energy pipeline is lowered, and the heat leakage power of the liquefied shale gas transferring pipeline is lowered; and furthermore, operating cost of a low-temperature refrigerator arranged outside the combined energy pipeline is saved.

Description

technical field [0001] The invention relates to the technical field of oil and gas storage and transportation and the technical field of power transmission, in particular to a low-cost liquefied shale gas-liquid nitrogen-superconducting DC cable composite energy pipeline design method. Background technique [0002] In recent years, in order to alleviate the increasingly serious energy crisis and environmental protection pressure, in addition to the long-distance transportation of compressed shale gas and liquefied shale gas, shale gas has also been directly used for power generation applications. A large-capacity shale gas power station is directly built in the area where shale gas is mined, and then transmitted to long-distance power users through traditional high-voltage transmission lines. Because shale gas mining areas are often far away from large and medium-sized urban areas with concentrated electricity consumption, traditional high-voltage transmission methods will i...

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Problems solved by technology

However, this patent does not comprehensively consider the three constraints of maximum allowable pressure drop, maximum allowable temperature rise, and maximum allowable vacuum degree change rate to realize long-distance, large-capacity liquefied shale gas-liquid nitrogen-superconducting DC cables Hybrid Energy Transmission

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