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

A technology of composite energy and pipeline design, applied in pipeline support, pipeline protection, pipeline heating/cooling, etc., can solve the problem of not comprehensively considering the maximum allowable pressure drop and the maximum allowable vacuum degree change rate.

CN107631105AActive Publication Date: 2018-01-26SICHUAN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-01-26

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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.
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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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Embodiment Construction

[0049] The present invention will be further described in detail below in combination with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0050] combine figure 1 The structure diagram of the liquefied shale gas-liquid nitrogen-superconducting DC cable composite energy transmission pipeline of the present invention is shown; wherein, the design method of the liquefied shale gas-liquid nitrogen-superconducting DC cable composite energy pipeline of the present invention includes the following steps :

[0051] 1) Determine the structure of the liquefied shale gas-liquid nitrogen-superconducting DC cable composite energy pipeline; wherein, the superconducting DC cable is coaxially arranged inside the liquid nitrogen transmission pipeline, a...