CN113074281A - Liquefied gas energy storage and transportation pipeline and superconducting transmission line system and method - Google Patents

Liquefied gas energy storage and transportation pipeline and superconducting transmission line system and method Download PDF

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Publication number
CN113074281A
CN113074281A CN202110372924.4A CN202110372924A CN113074281A CN 113074281 A CN113074281 A CN 113074281A CN 202110372924 A CN202110372924 A CN 202110372924A CN 113074281 A CN113074281 A CN 113074281A
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China
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liquefied gas
transmission line
pipeline
energy storage
liquefied
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CN202110372924.4A
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Chinese (zh)
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杨润童
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/34—Cable fittings for cryogenic cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J15/00—Systems for storing electric energy
    • H02J15/008—Systems for storing electric energy using hydrogen as energy vector
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Abstract

A liquefied gas energy storage and transportation pipeline and a superconducting power transmission system and method comprise: the device comprises a gas liquefaction device, a liquefied gas energy storage and transportation pipeline device, a low-temperature superconducting transmission line and a liquefied gas pressurization conveying device; the liquefied gas energy storage and transportation pipeline device comprises a low-temperature-resistant storage and transportation pipeline, a heat-insulating material wrapping layer, a low-temperature pipeline valve and a low-temperature liquid transport pump; the low-temperature superconducting transmission line is a transmission line laid in the liquefied gas energy storage and transportation pipeline in a low-temperature environment; or the liquefied gas energy storage and transportation pipeline made of metal is used as a low-temperature superconducting transmission line; the liquefied gas pressurizing and conveying device comprises a liquefied gas pressurizing pump, a relevant switching valve and a connecting pipeline connected with the liquefied gas energy storage and transportation pipeline. The invention provides a liquefied gas energy storage and transportation pipeline and a superconducting power transmission line system and method which can simultaneously realize two functions of large-scale energy storage and low-temperature superconducting power transmission.

Description

Liquefied gas energy storage and transportation pipeline and superconducting transmission line system and method
Technical Field
The invention relates to the technical field of liquefied gas energy storage and superconducting power transmission, in particular to a liquefied gas energy storage and storage pipeline, a superconducting power transmission line system and a method.
Background
In today's world, the growth of economies in countries requires a reliable, durable power infrastructure. Particularly in urban areas with densely populated economic, trade and political centres, where the demand for power load capacity is increasing, any significant power outage can have a serious impact on its economy and safety. Generally speaking, underground space of a central urban area is crowded, the reconstruction cost of a power grid is extremely high, and the superconducting cable provides an excellent solution for the reconstruction cost. Compared with the traditional power cable, the superconducting cable has the advantages of small volume, large capacity, low loss, strong safety and stability, and can have the function of a current limiter in a fault state, and meanwhile, the superconducting cable has a good electromagnetic shielding function and cannot interfere with other underground facilities. Compared with the conventional large-section copper core cable, the high-temperature superconducting cable is light in weight, the comprehensive civil engineering installation cost is lower, and the civil engineering installation cost always accounts for a large part of the project cost of the cable. However, the high-temperature superconducting cable is high in manufacturing cost, and particularly, a low-temperature liquefied gas cooling layer (generally, liquid nitrogen is introduced for cooling) needs to be arranged in the middle of the cable, so that high manufacturing and maintenance costs of a low-temperature liquefied gas system are required.
On the other hand, liquefied air is an important way for large-scale energy storage and power storage in the future, and particularly at the present day when renewable energy power generation is rapidly increased, energy storage technology becomes a scientific and technological subject which must be carefully considered in various fields of the future society. With the arrival of the hydrogen energy society, the liquefied gas energy storage is further expanded from the liquefied air energy storage to the liquefied hydrogen energy storage, and in addition, the wide application of the existing LNG (liquefied natural gas), namely the liquefied petroleum gas, the liquefied gas energy storage technology has wider and wider application prospects in the future.
Disclosure of Invention
Objects of the invention
The invention aims to provide a liquefied gas energy storage and storage pipeline and a superconducting power transmission line system and a method which are combined by a liquefied gas energy storage technology and a low-temperature superconducting power transmission technology, and simultaneously lay a superconducting power transmission cable in a low-temperature environment under the condition that liquefied gas energy storage is realized by utilizing a liquefied gas storage and storage pipeline, so that two functions of large-scale energy storage and power storage and low-temperature superconducting power transmission are realized simultaneously.
(II) technical scheme
In order to solve the above problems, a first aspect of the present invention provides a method for achieving the above object, the method including:
a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system are characterized by comprising:
the device comprises a gas liquefaction device, a liquefied gas energy storage and transportation pipeline device, a low-temperature superconducting transmission line and a liquefied gas pressurization conveying device;
the liquefied gas energy storage and transportation pipeline device comprises a low-temperature-resistant storage and transportation pipeline, a heat-insulating material wrapping layer, a low-temperature pipeline valve and a low-temperature liquid transport pump;
the low-temperature superconducting transmission line is a transmission line laid in the liquefied gas energy storage and transportation pipeline in a low-temperature environment; or the liquefied gas energy storage and transportation pipeline made of metal is used as a low-temperature superconducting transmission line;
the liquefied gas pressurizing and conveying device comprises a liquefied gas pressurizing pump, a relevant switching valve and a connecting pipeline connected with the liquefied gas energy storage and transportation pipeline.
Optionally, the system further comprises a liquefied gas expansion power generation device, and the liquefied gas expansion power generation device drives a gas turbine to drive a generator to generate power by using pressure energy generated by the expansion of the liquefied gas.
Optionally, the liquefied gas comprises any one or combination of liquefied air, liquefied hydrogen, liquefied nitrogen, liquefied natural gas, liquefied methane gas, liquefied oxygen, and liquefied helium.
Optionally, the gas liquefaction device is any one or a combination of low-temperature liquefaction, high-pressure liquefaction or high-pressure low-temperature liquefaction, the low-temperature or high-pressure liquefaction is realized by driving a gas compressor or a refrigerator by using low-price electric power such as renewable energy power generation, power grid peak load modulation, night off-peak power and the like, and the high-pressure or low-temperature liquefaction is used for realizing mass storage of electric energy.
Optionally, the hydrogen in the liquefied hydrogen is generated by an electrolytic hydrogen production device from any low-price power, such as renewable energy power generation power, grid peak-load and frequency-modulation power, night valley power, and the like.
Optionally, the electrolytic hydrogen production device is any one or combination of an alkaline electrolytic hydrogen production tank, a proton membrane electrolytic hydrogen production tank and a high-temperature solid oxide electrolytic hydrogen production tank.
Optionally, the renewable energy power generation comprises any one or combination of solar power generation, wind power generation, geothermal power generation, biomass burning power generation, garbage burning power generation, ocean power generation and other renewable energy power generation.
Optionally, the liquefied gas booster pump is any one or a combination of a low temperature resistant centrifugal pump, an axial flow pump, a piston pump, a plunger pump, a diaphragm pump, a gear pump, a screw pump and a sliding vane pump.
Optionally, the system further comprises a power transmission line laid in the liquefied gas energy storage and transportation pipeline and a connection sealing assembly of an inlet and outlet pipeline of the power transmission line, wherein the connection sealing assembly ensures the sealing and insulation of the inlet and outlet pipeline of the power transmission line.
Optionally, the power transmission line in the liquefied gas energy storage and transportation pipeline is any one of a high-voltage direct-current power transmission line or a high-voltage three-phase alternating-current power transmission line.
Optionally, the system further comprises a power transmission line and a connection sealing and insulating assembly thereof, wherein the liquefied gas energy storage and transportation pipeline made of metal is used as the power transmission line, and the connection sealing and insulating assembly ensures the sealed connection and insulation of the storage and transportation pipeline used as the power transmission line.
Optionally, the storage and transportation pipeline serving as the power transmission line is any one of a high-voltage direct-current power transmission line or a high-voltage three-phase alternating-current power transmission line.
Optionally, the storage and transportation pipeline high-voltage three-phase alternating-current transmission line is a layered three-phase electric transmission pipeline, the pipeline is made of metal materials which are easy to generate superconducting phenomena at low temperature, three layers of metal materials are used for respectively transmitting alternating-current three-phase currents, and an insulation layer and a heat preservation layer are arranged between the three layers, so that the pipeline can meet the pipeline strength requirement and the heat preservation and insulation requirement of high-voltage low-temperature liquefied gas transmission.
Optionally, the liquefied gas energy storage and transportation pipeline is externally wrapped with an insulating layer, the energy storage and transportation pipeline with the insulating layer is preferably laid in a direct-buried manner, and the direct-buried laying pipeline is laid in the underground range of 0.5 m to 100 m.
Optionally, the heat insulation layer is made of any one or a combination of rock wool, glass wool, polyurethane, composite silicate, aerogel, aluminum silicate fiber and the like.
The liquefied gas energy storage and transportation pipeline and the superconducting power transmission method of the system according to any one of the above schemes are characterized by comprising the following steps:
s1: the type of the liquefied gas is selected to be any one or combination of liquefied air, liquefied hydrogen, liquefied nitrogen, liquefied natural gas, liquefied methane gas, liquefied oxygen and liquefied helium according to the resource and energy conditions in the region.
S2: according to the type of the liquefied gas and the working temperature range thereof, the type of the liquefied gas energy storage and transportation pipeline and the superconducting power transmission line is selected and planned to be any one of a direct current power transmission line, a three-phase alternating current power transmission line, a metal pipeline direct current power transmission line and a metal pipeline three-phase alternating current power transmission line, and the type of the material of the pipeline or the power transmission line is selected, so that the quasi-superconducting power transmission function is realized within the working temperature range of the liquefied gas.
S3: according to the type of the liquefied gas and the working temperature range thereof, selecting the material of the thermal insulation material of the outer layer of the liquefied gas energy storage and transportation pipeline, and selecting the laying depth of the pipeline under the direct ground, wherein the laying depth is any numerical value within the depth range of 0.5 meter to 100 meters underground.
S4: according to the resource, energy, building and energy demand conditions in the region, planning and designing a path through which liquefied gas energy storage and transportation pipelines and direct-buried laying of power transmission lines pass, the positions of branch pipelines, and site selection of a pressurization delivery station, a relay pump station, a decompression expansion power station or a transformer substation.
S5: at a gas receiving end of a liquefied gas energy storage and transportation pipeline, a heat exchanger is utilized to realize the gasification of liquefied gas, and any one of combustible gases such as gasified hydrogen, natural gas and methane gas is used as fuel to be supplied to energy utilization equipment of the receiving end, wherein the energy utilization equipment comprises any one or combination of energy utilization equipment such as a boiler, a fuel cell, a gas turbine, an internal combustion engine, a stirling engine, a combustor, a gas cooker and the like.
S6: at the gas receiving end of the liquefied gas energy storage and transportation pipeline, pressure energy generated by the expansion of the liquefied gas is utilized by the liquefied gas expansion power generation device to drive a gas turbine to drive a generator to generate power.
S7: the gasification of the liquefied gas is realized by utilizing a heat exchanger at a gas receiving end of the liquefied gas energy storage and transportation pipeline, and the cold energy absorbed by the heat exchanger is used for building air-conditioning refrigeration or refrigeration of a refrigeration house and a refrigerated vehicle.
S8: at the electric power receiving end of the liquefied gas superconducting transmission line, high-voltage direct current or alternating current electric power transmitted by the liquefied gas superconducting transmission line is converted into low-voltage direct current or low-voltage alternating current electric power which can be used by the receiving end by using power transmission and transformation equipment.
(III) advantageous effects
The technical scheme of the invention has the following beneficial technical effects:
1) the liquefied gas energy storage and transportation pipeline device can simultaneously realize two functions of large-scale liquefied gas energy storage and liquefied gas energy transportation.
2) The system can be used for realizing large-scale low-cost storage and transportation by utilizing fluctuating renewable energy power generation, and one medium for storage and transportation is various available liquefied gases; another approach is to use a low-temperature superconducting power line to realize long-distance low-loss power superconducting transmission of renewable energy power generation.
3) The low-temperature environment caused by the liquefied gas becomes the most conveniently utilized low-temperature superconducting environment for transmitting power by the low-temperature superconducting power line, so that the manufacturing cost of the superconducting power line cable is greatly reduced, the operating cost of superconducting power transmission is greatly reduced, and the superconducting power line cable is more economically feasible.
4) The liquefied gas storage and transportation pipeline itself becomes a transmission cable for low-temperature superconducting power transmission, which can greatly reduce the manufacturing cost and material cost of two energy sources coupled in a system, so that one pipeline can be used as a transmission pipeline for liquefied gas energy sources and a transmission line for low-temperature superconducting power transmission.
5) The liquefied gas can be used for generating power by driving a generator through a turbine expander, and the combustible liquefied gas can also be used as fuel to generate power by using a gas turbine or an internal combustion engine at a receiving end.
6) In the process of compressing and liquefying the gas, the released heat can be used for heating buildings, domestic water or water supply or condensed water of a thermal power plant.
7) In the process of expansion gasification of the liquefied gas, the released cold energy can be used for building air-conditioning refrigeration, data center air-conditioning cooling or large-scale cold storage and commercial super-cooling.
Drawings
FIG. 1 is a schematic diagram of a liquefied gas energy storage and transportation pipeline and a superconducting transmission line system according to an embodiment of the present invention;
fig. 2 is a schematic layout view of a superconducting power transmission line disposed in the middle of a liquefied gas energy storage and transportation pipeline according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a liquefied gas energy storage and transportation pipeline with a three-layer structure as a three-phase ac power transmission line according to an embodiment of the present invention.
Fig. 4 is a schematic view of a pipeline of the liquefied gas energy storage and transportation pipeline device according to an embodiment of the present invention.
Fig. 5 is another piping diagram of the liquefied gas energy storage and transportation piping apparatus according to an embodiment of the present invention.
Fig. 6 is a schematic view of another pipeline of the liquefied gas energy storage and transportation pipeline device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the drawings a schematic view of a layer structure according to an embodiment of the invention is shown. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
In an alternative embodiment, as shown in fig. 1, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system includes: and the gas liquefaction device is used for liquefying gas. Optionally, the liquefied gas includes any one or combination of liquefied air, liquefied hydrogen, liquefied nitrogen, liquefied natural gas, liquefied methane gas, liquefied oxygen gas, and liquefied helium gas. Further optionally, the hydrogen in the liquefied hydrogen is generated by an electrolytic hydrogen production device from any low-price power, such as renewable energy power generation power, grid peak-load and frequency-modulation power, night valley power, and the like. Still further optionally, the hydrogen production device is any one or a combination of an alkaline electrolysis hydrogen production tank, a proton membrane electrolysis hydrogen production tank and a high-temperature solid oxide electrolysis hydrogen production tank. Alternatively, the gas liquefaction device may be any one or combination of low-temperature liquefaction, high-pressure liquefaction or high-pressure low-temperature liquefaction, the low-temperature or high-pressure liquefaction is realized by driving a gas compressor or a refrigerator by using low-price electric power such as renewable energy power generation, power grid peak load modulation, night off-peak power and the like, and the high-pressure or low-temperature liquefaction is realized by using high-pressure or low-temperature liquefied gas to store a large amount of electric energy.
In an alternative embodiment, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system include: the liquefied gas energy storage and transportation pipeline device comprises a low-temperature-resistant storage and transportation pipeline, a heat-insulating material wrapping layer, a low-temperature pipeline valve and a low-temperature liquid transport pump. The liquefied gas energy storage and transportation pipeline and the superconducting power transmission system consider the expansion and contraction of the pipeline material and the power transmission line caused by temperature change, and any one or combination of a metal expansion corrugated pipe, a large-curvature bent pipeline or a snake-shaped reciprocating multiple bent pipeline is arranged as a facility for absorbing the size deformation of the pipeline caused by the expansion and contraction of the pipeline (see fig. 3 to 5). The liquefied gas energy storage and transportation pipeline can be wrapped with an insulating layer (see figure 2), the energy storage and transportation pipeline with the insulating layer is preferably laid in a direct-buried mode, and the direct-buried laying pipeline is laid underground within the range of 0.5 m to 100 m. Optionally, the heat insulation layer is made of any one or a combination of rock wool, glass wool, polyurethane, composite silicate, aerogel, aluminum silicate fiber and the like.
In an alternative embodiment, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system include: a low temperature superconducting power transmission line comprising: the low-temperature superconducting transmission line is a transmission line paved in the liquefied gas energy storage and transportation pipeline under the low-temperature environment; or the liquefied gas energy storage and transportation pipeline made of metal is used as the low-temperature superconducting transmission line.
In an alternative embodiment, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system include: a low temperature superconducting power transmission line comprising: liquefied gas pressurization conveying device; the liquefied gas pressurizing and conveying device comprises a liquefied gas pressurizing pump, a relevant switching valve and a connecting pipeline connected with the liquefied gas energy storage and transportation pipeline. Optionally, the liquefied gas booster pump can be any one or combination of a low temperature resistant centrifugal pump, an axial flow pump, a piston pump, a plunger pump, a diaphragm pump, a gear pump, a screw pump and a sliding vane pump. Optionally, the liquefied gas energy storage and transportation pipeline device at least comprises a liquefied gas relay pressurization station, an electric power output end and a sealed heat preservation and pressure regulation unit.
In an alternative embodiment, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system include: a low temperature superconducting power transmission line comprising: the liquefied gas expansion power generation device drives a gas turbine to drive a generator to generate power by utilizing pressure energy generated by the expansion of the liquefied gas.
In an alternative embodiment, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system include: the power transmission line paved in the liquefied gas energy storage and transportation pipeline and the connection sealing assembly of the inlet and outlet pipeline thereof ensure the sealing and insulation of the inlet and outlet pipeline of the power transmission line. Optionally, the power transmission line in the liquefied gas energy storage and transportation pipeline is any one of a high voltage direct current power transmission line or a high voltage three-phase alternating current power transmission line (see fig. 3).
In an alternative embodiment, a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system include: the liquefied gas energy storage and transportation pipeline made of metal materials is used as a power transmission line and a connecting sealing and insulating assembly of the power transmission line, and the connecting sealing and insulating assembly ensures the sealing connection and insulation of the storage and transportation pipeline used as the power transmission line. Optionally, the storage and transportation pipeline serving as the power transmission line may be any one of a high voltage direct current power transmission line or a high voltage three-phase alternating current power transmission line. Further optionally, the storage and transportation pipeline high-voltage three-phase alternating-current transmission line is a layered three-phase electric transmission pipeline, the pipeline is made of metal materials which easily generate a superconducting phenomenon at low temperature, three layers of metal materials are used for respectively transmitting alternating-current three-phase current, and an insulation layer and a heat preservation layer are arranged between the three layers, so that the pipeline can meet the pipeline strength requirement and the heat preservation and insulation requirement of high-voltage low-temperature liquefied gas transmission.
The embodiments can be combined at will, the low-temperature environment temperature of the liquefied air reaches about-200 ℃, and the power transmission of the quasi-superconducting cable can be realized by using low-price metal cable materials under the environment, so that the loss of the power transmission line is greatly reduced. If the low-temperature environment naturally caused by liquefied gas energy storage can be combined with the low-temperature superconducting power transmission technology, large-scale liquefied gas energy storage of renewable energy can be realized at low cost, and meanwhile, the low-temperature environment of liquefied gas helps to realize power transmission of the superconducting technology. The invention innovatively combines the low-temperature liquefied gas energy storage and transportation technology with the low-temperature superconducting power transmission technology, not only can utilize a low-temperature pipeline to transport and store liquefied gas to realize large-scale liquefied gas energy storage and energy transmission, but also is provided with a low-temperature superconducting power transmission line in the low-temperature liquefied gas storage and transportation pipeline to realize low-temperature superconducting power transmission at low cost and low price, so that two energy storage and transportation modes are combined in one system, namely the liquefied gas energy transmission and the power transmission are coupled in the system.
The liquefied gas energy storage and transportation pipeline and the superconducting power transmission system of the embodiment can be used in various scenes, such as supplying power to a building energy station.
Second embodiment
In an alternative embodiment, there is provided a liquefied gas energy storage and transportation pipeline and a superconducting power transmission method of a liquefied gas energy storage and transportation pipeline and a superconducting power transmission system according to the first embodiment, including the steps of:
s1: the type of the liquefied gas is selected to be any one or combination of liquefied air, liquefied hydrogen, liquefied nitrogen, liquefied natural gas, liquefied methane gas, liquefied oxygen and liquefied helium according to the resource and energy conditions in the region.
S2: according to the type of the liquefied gas and the working temperature range thereof, the type of the liquefied gas energy storage and transportation pipeline and the superconducting power transmission line is selected and planned to be any one of a direct current power transmission line, a three-phase alternating current power transmission line, a metal pipeline direct current power transmission line and a metal pipeline three-phase alternating current power transmission line, and the type of the material of the pipeline or the power transmission line is selected, so that the quasi-superconducting power transmission function is realized within the working temperature range of the liquefied gas.
S3: according to the type of the liquefied gas and the working temperature range thereof, selecting the material of the thermal insulation material of the outer layer of the liquefied gas energy storage and transportation pipeline, and selecting the laying depth of the pipeline under the direct ground, wherein the laying depth is any numerical value within the depth range of 0.5 meter to 100 meters underground.
S4: according to the resource, energy, building and energy demand conditions in the region, planning and designing a path through which liquefied gas energy storage and transportation pipelines and direct-buried laying of power transmission lines pass, the positions of branch pipelines, and site selection of a pressurization delivery station, a relay pump station, a decompression expansion power station or a transformer substation.
S5: at a gas receiving end of a liquefied gas energy storage and transportation pipeline, a heat exchanger is utilized to realize the gasification of liquefied gas, and any one of combustible gases such as gasified hydrogen, natural gas and methane gas is used as fuel to be supplied to energy utilization equipment of the receiving end, wherein the energy utilization equipment comprises any one or combination of energy utilization equipment such as a boiler, a fuel cell, a gas turbine, an internal combustion engine, a stirling engine, a combustor, a gas cooker and the like.
S6: at the gas receiving end of the liquefied gas energy storage and transportation pipeline, pressure energy generated by the expansion of the liquefied gas is utilized by the liquefied gas expansion power generation device to drive a gas turbine to drive a generator to generate power.
S7: the gasification of the liquefied gas is realized by utilizing a heat exchanger at a gas receiving end of the liquefied gas energy storage and transportation pipeline, and the cold energy absorbed by the heat exchanger is used for building air-conditioning refrigeration or refrigeration of a refrigeration house and a refrigerated vehicle.
S8: at the electric power receiving end of the liquefied gas superconducting transmission line, high-voltage direct current or alternating current electric power transmitted by the liquefied gas superconducting transmission line is converted into low-voltage direct current or low-voltage alternating current electric power which can be used by the receiving end by using power transmission and transformation equipment.
The sequence of the steps can be changed according to actual conditions.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
The invention has been described above with reference to embodiments thereof. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention, and these alternatives and modifications are intended to be within the scope of the invention.
Although the embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions, and alterations can be made hereto without departing from the spirit and scope of the invention.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Claims (16)

1. A liquefied gas energy storage and transportation pipeline and a superconducting power transmission system are characterized by comprising:
the device comprises a gas liquefaction device, a liquefied gas energy storage and transportation pipeline device, a low-temperature superconducting transmission line and a liquefied gas pressurization conveying device;
the liquefied gas energy storage and transportation pipeline device comprises a low-temperature-resistant storage and transportation pipeline, a heat-insulating material wrapping layer, a low-temperature pipeline valve and a low-temperature liquid transport pump;
the low-temperature superconducting transmission line is a transmission line laid in the liquefied gas energy storage and transportation pipeline in a low-temperature environment; or the liquefied gas energy storage and transportation pipeline made of metal is used as a low-temperature superconducting transmission line;
the liquefied gas pressurizing and conveying device comprises a liquefied gas pressurizing pump, a relevant switching valve and a connecting pipeline connected with the liquefied gas energy storage and transportation pipeline.
2. The system of claim 1, further comprising a liquefied gas expansion power generation device, wherein the liquefied gas expansion power generation device uses pressure energy generated by the expansion of the liquefied gas to drive a gas turbine to drive a generator to generate power.
3. The system of claim 1, wherein the liquefied gas comprises any one or combination of liquefied air, liquefied hydrogen, liquefied nitrogen, liquefied natural gas, liquefied methane gas, liquefied oxygen, and liquefied helium.
4. The system according to claim 1, wherein the gas liquefaction device is any one or combination of low-temperature liquefaction, high-pressure liquefaction or high-pressure low-temperature liquefaction, the low-temperature or high-pressure liquefaction is realized by driving a gas compressor or a refrigerator by using low-price electric power such as renewable energy power generation, power grid peak-load modulation, night off-peak power and the like, and the high-pressure or low-temperature liquefaction is realized by using high-pressure or low-temperature liquefied gas to store a large amount of electric energy.
5. The system according to claim 3, wherein the hydrogen in the liquefied hydrogen is hydrogen generated by an electrolytic hydrogen production device from any one of renewable energy power generation power, grid peak-shaving frequency-modulation power, night valley power and the like.
6. The system of claim 1, wherein the electrolytic hydrogen production device is any one or combination of an alkaline electrolytic hydrogen production cell, a proton membrane electrolytic hydrogen production cell and a high-temperature solid oxide electrolytic hydrogen production cell.
7. The system according to claim 1, wherein the liquefied gas energy storage and transportation pipeline and the superconducting power transmission system are provided with any one or a combination of a metal expansion corrugated pipe, a large-curvature bent pipeline or a snake-shaped reciprocating multiple bent pipeline as a facility for absorbing the size deformation of the pipeline caused by thermal expansion and cold contraction, considering the thermal expansion and cold contraction of the pipeline material and the power transmission line caused by temperature change.
8. The system of claim 1, wherein the liquefied gas booster pump is any one or combination of a low temperature resistant centrifugal pump, an axial flow pump, a piston pump, a plunger pump, a diaphragm pump, a gear pump, a screw pump, and a sliding vane pump.
9. The system of claim 1, further comprising a connection sealing assembly for the transmission line and its inlet and outlet pipes, which are laid in the liquefied gas energy storage and transportation pipeline, wherein the connection sealing assembly ensures the sealing and insulation of the inlet and outlet pipes of the transmission line.
10. The system of claim 9, wherein the power transmission line in the liquefied gas energy storage and transportation pipeline is any one of a high voltage direct current power transmission line or a high voltage three phase alternating current power transmission line.
11. The system of claim 1, further comprising a metal liquefied gas energy storage and transportation pipeline itself as the power transmission line, and a connection sealing and insulating component thereof, wherein the connection sealing and insulating component ensures the sealed connection and insulation of the storage and transportation pipeline as the power transmission line.
12. The system of claim 11, wherein the storage and transportation pipeline as the transmission line is any one of a high voltage direct current transmission line or a high voltage three phase alternating current transmission line.
13. The system according to claim 11 or 12, wherein the storage and transportation pipeline high-voltage three-phase alternating-current transmission line is a layered three-phase electric transmission pipeline, the pipeline is made of metal materials which easily generate superconductivity at low temperature, three layers of metal materials respectively transmit alternating three-phase current, and an insulating layer and a heat preservation layer are arranged between the three layers, so that the pipeline can meet the pipeline strength requirement and the heat preservation and insulation requirement of high-voltage low-temperature liquefied gas transportation.
14. The system of claim 1, wherein the liquefied gas energy storage and transportation pipeline is externally wrapped with an insulating layer, the energy storage and transportation pipeline with the insulating layer is preferably laid in a direct-buried manner, and the direct-buried laying pipeline is laid in the underground range of 0.5 m to 100 m.
15. The system of claim 13 or 14, wherein the heat insulation layer is made of any one or combination of rock wool, glass wool, polyurethane, composite silicate, aerogel, aluminum silicate fiber and the like.
16. A liquefied gas energy storage and transportation pipeline and a superconducting power transmission method according to the system of any one of claims 1 to 15, wherein the energy storage and transportation pipeline and the superconducting power transmission method comprise the steps of:
s1: selecting the type of the liquefied gas as any one or combination of liquefied air, liquefied hydrogen, liquefied nitrogen, liquefied natural gas, liquefied methane gas, liquefied oxygen and liquefied helium according to the resource and energy conditions in the region;
s2: according to the type of the liquefied gas and the working temperature range thereof, selecting the type of a planning design liquefied gas energy storage and transportation pipeline and a superconducting transmission line as any one of a direct current transmission line, a three-phase alternating current transmission line, a metal pipeline direct current transmission line and a metal pipeline three-phase alternating current transmission line, and selecting the type of the pipeline or the material of the transmission line to realize the quasi-superconducting power transmission function within the working temperature range of the liquefied gas;
s3: selecting the material of the thermal insulation material on the outer layer of the liquefied gas energy storage and transportation pipeline according to the type and the working temperature range of the liquefied gas, and selecting the laying depth of the pipeline under the direct ground, wherein the laying depth is any numerical value within the depth range of 0.5 meter to 100 meters underground;
s4: planning and designing a path through which a liquefied gas energy storage and transportation pipeline and a direct-buried laying of a power transmission line pass, a branch pipeline position, and site selection of a pressurization delivery station, a relay pump station, a decompression expansion power station or a transformer substation according to the resource, energy, building and energy demand conditions in the region;
s5: at a gas receiving end of a liquefied gas energy storage and transportation pipeline, a heat exchanger is utilized to realize the gasification of liquefied gas, and any one of combustible gases such as gasified hydrogen, natural gas and methane gas is used as fuel to be supplied to energy utilization equipment of the receiving end, wherein the energy utilization equipment comprises any one or combination of energy utilization equipment such as a boiler, a fuel cell, a gas turbine, an internal combustion engine, a stirling engine, a combustor, a gas cooker and the like.
S6: at the gas receiving end of the liquefied gas energy storage and transportation pipeline, the pressure energy generated by the expansion of the liquefied gas is used for driving a gas turbine to drive a generator to generate electricity by using a liquefied gas expansion power generation device;
s7: the method comprises the following steps that (1) at a gas receiving end of a liquefied gas energy storage and transportation pipeline, the gasification of liquefied gas is realized by utilizing a heat exchanger, and cold energy absorbed by the heat exchanger is used for building air-conditioning refrigeration or refrigeration house and refrigerated vehicle cold supply;
s8: at the electric power receiving end of the liquefied gas superconducting transmission line, high-voltage direct current or alternating current electric power transmitted by the liquefied gas superconducting transmission line is converted into low-voltage direct current or low-voltage alternating current electric power which can be used by the receiving end by using power transmission and transformation equipment.
CN202110372924.4A 2020-11-17 2021-04-07 Liquefied gas energy storage and transportation pipeline and superconducting transmission line system and method Withdrawn CN113074281A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114383056A (en) * 2022-01-12 2022-04-22 中海石油气电集团有限责任公司 Pipeline system and method for long-distance transportation of liquefied natural gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114383056A (en) * 2022-01-12 2022-04-22 中海石油气电集团有限责任公司 Pipeline system and method for long-distance transportation of liquefied natural gas

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Application publication date: 20210706