Energy island system, control method, computer equipment and storage medium

Abstract

The invention relates to an energy island system, a control method, computer equipment and a storage medium, the system comprises a power generation module, a heat exchange module, a compression expansion module, a cold storage / release module and a heat storage / release module, and the power generation module uses seawater temperature difference energy to generate power; the compression and expansion module is electrically connected with the power generation module, is connected with the heat exchange module through a pipeline, and compresses and / or expands the heat exchange cycle working medium; the heat exchange cycle working medium circularly flows in a pipeline of the compression expansion module and the power generation module; the heat exchange module is connected with the power generation module, the cold storage / release module and the heat storage / release module through pipelines; the cold storage / release module is used for storing redundant power generation in the form of cold energy during the power consumption valley period and releasing the cold energy during the power consumption peak period; and the cold storage / release module stores the redundant generated energy in the form of heat energy during the power consumption valley period, and releases the heat energy during the power consumption peak period. According to the energy island system, stable and rich seawater temperature difference energy is utilized for power generation, and long-acting and energy-saving continuous operation can be achieved.

Description

Technical Field

[0001] The present application relates to the field of marine engineering technology, and in particular to an energy island system, a control method, a computer device and a storage medium. Background Art

[0002] In the context of the rapid development of the global economy, people are increasingly demanding energy, but traditional fossil energy faces problems such as limited total amount and environmental pollution. The ocean occupies 70% of the earth's surface and has abundant renewable energy. The development of marine energy has become one of the important directions of energy transformation. Offshore energy islands and deep sea islands have become the springboard and outpost for the exploration of marine energy.

[0003] At present, the multi-energy coupling systems of offshore energy islands mostly use offshore wind energy and solar energy as their main energy sources, which are greatly affected by weather conditions and environmental factors. In addition, some systems are not completely independent and still need to use industrial waste heat or thermal power flue gas to assist the system operation. However, the temperature difference of ocean water is stable and abundant, and it is urgent to use the temperature difference of the ocean to build an offshore energy island system with multi-level energy utilization and long-term energy saving. Summary of the invention

[0004] Based on this, it is necessary to provide an energy island system, control method, computer equipment and storage medium that can achieve multi-level energy utilization and long-term energy saving in response to the above technical problems.

[0005] In a first aspect, the present application provides an energy island system, including a power generation module, a heat exchange module, a compression expansion module, a cold storage / release module, and a heat storage / release module;

[0006] The power generation module is used to generate electricity using the temperature difference of seawater;

[0007] The compression and expansion module is electrically connected to the power generation module and is connected to the heat exchange module through a pipeline, and is used to compress and / or expand the heat exchange cycle working medium; wherein the heat exchange cycle working medium is used to circulate in the pipelines of the compression and expansion module and the power generation module;

[0008] The heat exchange module is connected to the power generation module, the cold storage / release module and the heat storage / release module through pipelines; wherein the cold storage / release module is used to store excess power generation in the form of cold energy during the off-peak period of electricity consumption, and release cold energy during the peak period of electricity consumption; the cold storage / release module is used to store excess power generation in the form of heat energy during the off-peak period of electricity consumption, and release heat energy during the peak period of electricity consumption.

[0009] In one embodiment, the heat exchange module includes a first heat exchange unit, a second heat exchange unit, a third heat exchange unit, a fourth heat exchange unit, a fifth heat exchange unit and a circulating gas source; wherein,

[0010] One end of the first heat exchange pipeline of the first heat exchange unit is connected to the other end of the second heat exchange pipeline of the second heat exchange unit, the other end of the first heat exchange pipeline of the third heat exchange unit, and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; the other end of the first heat exchange pipeline of the first heat exchange unit is connected to a circulating gas source; a charging regulating valve is also provided on the connecting pipeline between the other end of the first heat exchange pipeline of the first heat exchange unit and the circulating gas source; the circulating gas source stores a heat exchange circulating working medium;

[0011] The other end of the second heat exchange pipeline of the second heat exchange unit is connected to the other end of the first heat exchange pipeline of the third heat exchange unit and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines;

[0012] One end of the first heat exchange pipeline of the third heat exchange unit is connected to the other end of the first heat exchange pipeline of the fourth heat exchange unit and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; the other end of the first heat exchange pipeline of the third heat exchange unit is connected to the other end of the first heat exchange pipeline of the fourth heat exchange unit and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; a second regulating valve is provided at one end of the second heat exchange pipeline of the third heat exchange unit;

[0013] One end of the first heat exchange pipeline of the fourth heat exchange unit is connected to the other end of the first heat exchange pipeline of the fifth heat exchange unit through a pipeline;

[0014] A first regulating valve is also provided on the connecting pipeline at the other end of the first heat exchange pipeline of the second heat exchange unit.

[0015] In one embodiment, the cold storage / release module includes a medium-temperature cold storage unit and a low-temperature cold storage unit, and the heat storage / release module includes a medium-temperature heat storage unit and a high-temperature heat storage unit; wherein,

[0016] One end of the second heat exchange pipeline of the first heat exchange unit is connected to the first end of the medium-temperature cold storage unit through a pipeline, and the other end of the second heat exchange pipeline of the first heat exchange unit is connected to one end of the low-temperature cold storage unit and the second end of the medium-temperature cold storage unit through pipelines;

[0017] One end of the first heat exchange pipeline of the fifth heat exchange unit is connected to the first end of the medium temperature heat storage unit and the other end of the high temperature heat storage unit through pipelines; the other end of the first heat exchange pipeline of the fifth heat exchange unit is connected to the second end of the medium temperature heat storage unit through a pipeline.

[0018] In one embodiment, the cold storage / release module further includes a cold energy heat exchange unit; the heat storage / release module further includes a heat energy heat exchange unit;

[0019] One end of the first heat exchange pipeline of the cold energy heat exchange unit is connected to the other end of the low temperature energy storage unit; the other end of the first heat exchange pipeline of the cold energy heat exchange unit is connected to the third end of the medium temperature energy storage unit;

[0020] One end of the second heat exchange pipeline of the thermal energy heat exchange unit is connected to the third end of the medium-temperature energy storage unit; the other end of the second heat exchange pipeline of the thermal energy heat exchange unit is connected to one end of the high-temperature energy storage unit.

[0021] In one embodiment, the compression-expansion module further includes a first compression unit, a second compression unit, a first expansion unit, a second expansion unit, a driving unit and a power generation unit; wherein,

[0022] One end of the first compression unit is connected to one end of the second heat exchange pipeline of the fifth heat exchange unit through a pipeline; the other end of the first compression unit is connected to one end of the second heat exchange pipeline of the fourth heat exchange unit;

[0023] One end of the first expansion unit is connected to the other end of the first heat exchange pipeline of the third heat exchange unit and the other end of the first heat exchange pipeline of the fourth heat exchange unit through a pipeline; the other end of the first expansion unit is connected to the other end of the first heat exchange pipeline of the first heat exchange unit through a pipeline; a first one-way valve is provided on the pipeline connected to the other end of the first expansion unit to allow the heat exchange cycle working medium to flow out from the other end of the first expansion unit;

[0024] One end of the second compression unit is connected to the other end of the first heat exchange pipeline of the third heat exchange unit and the other end of the first heat exchange pipeline of the fourth heat exchange unit through a pipeline; the other end of the second compression unit is connected to the other end of the first heat exchange pipeline of the first heat exchange unit through a pipeline;

[0025] One end of the second expansion unit is connected to one end of the second heat exchange pipeline of the fifth heat exchange unit through a pipeline; the other end of the second expansion unit is connected to one end of the second heat exchange pipeline of the fourth heat exchange unit through a pipeline; a second one-way valve is provided on the pipeline connected to the other end of the second expansion unit to allow the heat exchange cycle working medium to flow out from the other end of the second expansion unit;

[0026] The driving unit is electrically connected to the power output end of the power generation module, the power output end of the driving unit is connected to the first compression unit, and the driving unit is used to drive the first compression unit to compress the heat exchange cycle working medium using the excess power generated by the power generation module;

[0027] The first compression unit is connected to the first expansion unit through a coupling, and the second expansion unit is connected to the second compression unit through a coupling; the power generation unit is connected to the second expansion unit to utilize the second expansion unit to generate power.

[0028] In one embodiment, the power generation module includes a condensing heat exchange unit, an evaporating heat exchange unit, a cold water pump, a warm water pump, a circulating medium pump, a turbine, a first power generation circulation branch, a second power generation circulation branch and a generator; wherein,

[0029] The cold water pump is connected to the other end of the second heat exchange pipeline of the condensing heat exchange unit through a pipeline; the warm water pump is connected to one end of the first heat exchange pipeline of the evaporating heat exchange unit through a pipeline;

[0030] One end of the first heat exchange pipeline of the condensing heat exchange unit is connected to one end of the second heat exchange pipeline of the evaporating heat exchange unit through a pipeline through a first power generation circulation branch; the other end of the second heat exchange pipeline of the evaporating heat exchange unit is connected to one end of the turbine through a pipeline, and the other end of the turbine is connected to the other end of the first heat exchange pipeline of the condensing heat exchange unit through the second power generation circulation branch; the first power generation circulation branch is provided with a circulating working fluid pump; the rotating shaft of the turbine is connected to the generator;

[0031] One end of the first heat exchange pipeline of the condensing heat exchange unit is connected to one end of the first heat exchange pipeline of the second heat exchange unit; the other end of the first heat exchange pipeline of the condensing heat exchange unit is connected to the other end of the first heat exchange pipeline of the second heat exchange unit;

[0032] One end of the second heat exchange pipeline of the evaporative heat exchange unit is connected to one end of the second heat exchange pipeline of the third heat exchange unit; the other end of the second heat exchange pipeline of the evaporative heat exchange unit is connected to the other end of the second heat exchange pipeline of the third heat exchange unit.

[0033] In a second aspect, the present application further provides an energy island control method, which is applied to the energy island system as described in the first aspect; the method comprises:

[0034] If it is during the off-peak period, perform the following steps:

[0035] Cut off the pipeline connections between the heat exchange module and the power generation module, between the heat exchange module and the cold storage / release module, and between the heat exchange module and the heat storage / release module;

[0036] The excess power generated by the power generation module is used to drive the compression and expansion module to perform compression and expansion operations on the heat exchange circulation medium;

[0037] If the heat exchange cycle working fluid meets the preset temperature condition, the pipeline connection between the heat exchange module and the power generation module, and / or the heat exchange module and the cold storage / release module, and / or the heat exchange module and the heat storage / release module is restored to store excess power generation in the form of heat energy and / or cold energy.

[0038] In one embodiment, the method further comprises:

[0039] If it is during the preset peak power consumption period, perform the following steps:

[0040] Activate the cold storage / release module and the heat storage / release module to release the stored cold energy and heat energy;

[0041] Based on the released cold energy and heat energy, the compression-expansion module performs work to generate electricity;

[0042] The work power generation of the compression-expansion module and the temperature difference power generation of the power generation module are connected to the grid for output.

[0043] In a third aspect, the present application further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the second aspect when executing the computer program.

[0044] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method described in the second aspect are implemented.

[0045] The energy island system includes a power generation module, a heat exchange module, a compression and expansion module, a cold storage / release module and a heat storage / release module. The power generation module generates electricity using the temperature difference energy of seawater; the compression and expansion module is electrically connected to the power generation module, and is connected to the heat exchange module through a pipeline, and is used to compress and / or expand the heat exchange cycle working medium; the heat exchange cycle working medium is used to circulate in the pipelines of the compression and expansion module and the power generation module; the heat exchange module is connected to the power generation module, the cold storage / release module and the heat storage / release module through a pipeline; the cold storage / release module is used to store the excess power generation in the form of cold energy during the off-peak period of electricity consumption, and release the cold energy during the peak period of electricity consumption; the cold storage / release module is used to store the excess power generation in the form of heat energy during the off-peak period of electricity consumption, and release the heat energy during the peak period of electricity consumption. The energy island of the present application can generate electricity using the stable and abundant temperature difference energy of seawater, and can operate continuously in a long-term energy-saving manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] FIG1 is a structural block diagram of an energy island system in one embodiment;

[0048] FIG2 is a schematic diagram of the structure of an energy island system in one embodiment;

[0049] FIG3 is a schematic diagram of the piping structure of the heat exchange unit drawn horizontally as shown in FIG2 ;

[0050] FIG4 is a schematic diagram of the piping structure of the heat exchange unit drawn longitudinally as shown in FIG2 ;

[0051] FIG5 is a schematic diagram of the structure of an energy island system in which sensor positions are specifically set in one embodiment;

[0052] FIG6 is a method for controlling an energy island during a low-power consumption period in one embodiment;

[0053] FIG. 7 is a diagram showing an energy island control method during peak power consumption hours according to an embodiment. DETAILED DESCRIPTION

[0054] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0056] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0057] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0058] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0059] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0060] It should be noted that the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the objects associated before and after are in an "or" relationship. For example, the cold storage / release module described in this application means a module that can store or release cold energy. The character " / " in the cold storage / release module table indicates that the module can realize the function of storing or releasing cold energy.

[0061] In one embodiment, as shown in FIG1 , the present application provides an energy island system 100 , including a power generation module 101 , a heat exchange module 103 , a compression expansion module 105 , a cold storage / release module 109 , and a heat storage / release module 107 ;

[0062] The power generation module 101 is used to generate electricity using the temperature difference of seawater;

[0063] The compression and expansion module 105 is electrically connected to the power generation module 101 and is connected to the heat exchange module 103 through a pipeline, and is used to compress and / or expand the heat exchange cycle working medium; wherein the heat exchange cycle working medium is used to circulate in the pipelines of the compression and expansion module 105 and the power generation module 101;

[0064] The heat exchange module 103 is connected to the power generation module 101, the cold storage / release module 109 and the heat storage / release module 107 through pipelines; wherein the cold storage / release module 109 is used to store excess power generation in the form of cold energy during the off-peak period of electricity consumption, and release cold energy during the peak period of electricity consumption; the cold storage / release module 109 is used to store excess power generation in the form of heat energy during the off-peak period of electricity consumption, and release heat energy during the peak period of electricity consumption.

[0065] Among them, seawater temperature difference energy generation is to generate electricity by using the temperature difference between the surface and deep seawater of the ocean. It can be understood that the shallow seawater in the ocean has a higher temperature because it is directly exposed to solar radiation, while the deep seawater has a lower temperature because it is far away from the influence of solar radiation. Based on the above temperature difference, electrical energy can be generated through the thermodynamic cycle of the corresponding working fluid. Exemplarily, the power generation module 101 can generate electricity by using the temperature difference of seawater based on an open circulation system, a closed circulation system, or a hybrid circulation system. It should be understood that during the period of low electricity consumption, the power generation module 101 will generate some excess power in addition to meeting the power supply required by the user. This excess power generation can be used to drive the compression and expansion module 105 to perform work and store energy.

[0066] The compression and expansion module 105 is connected to the heat exchange module 103 through a pipeline, and is used to compress and / or expand the heat exchange cycle working fluid circulating in the pipeline. It can be understood that the compression and expansion module 105 can compress the gas to a smaller volume by doing work, and at the same time increase the internal energy of the heat exchange cycle working fluid gas molecules in the compression and expansion module 105, thereby increasing the temperature of the heat exchange cycle working fluid. On the other hand, when the heat exchange cycle working fluid is expanded through the compression and expansion module 105, work is done on the outside, resulting in a decrease in the internal energy of the heat exchange cycle working fluid and a decrease in its temperature. The temperature of the heat exchange cycle working fluid in the pipeline can be adjusted by the compression and / or expansion operation of the heat exchange cycle working fluid by the compression and expansion module 105. Exemplarily, during periods of low electricity consumption, the excess electricity generated by the power generation module 101 can drive the compression and expansion module 105 to compress and heat up the heat exchange cycle working fluid and / or expand and cool it, thereby converting the excess electricity into internal energy (cold energy / heat energy) in the heat exchange cycle working fluid, so as to further store the excess electricity through the cold storage / release module 109 and the heat storage / release module 107; during periods of peak electricity consumption, the cold energy and / or heat energy in the cold storage / release module 109 and the heat storage / release module 107 can be transferred to the heat exchange cycle working fluid through heat exchange, and the heat exchange cycle working fluid can do work externally when it expands, so as to drive the engine to generate electricity.

[0067] The heat exchange module 103 is respectively connected to the power generation module 101, the compression expansion module 105, the cold storage / release module 109 and the heat storage / release module 107 through pipelines. It can be understood that the heat exchange process between the heat exchange module 103 and the power generation module 101, the compression expansion module 105, the cold storage / release module 109 and the heat storage / release module 107 can be performed based on different heat exchange media in different modules. Exemplarily, the cold storage / release module 109 may include a cold storage medium for performing heat exchange with the heat exchange circulation medium, and the cold storage medium may be used to store the excess power generation of the power generation module 101 in the form of cold energy; the heat storage / release module 107 may include a heat storage medium for performing heat exchange with the heat exchange circulation medium, and the heat storage medium may be used to store the excess power generation of the power generation module 101 in the form of cold and hot energy; the power generation module 101 may include a power generation circulation medium for performing seawater temperature difference power generation, and the power generation circulation medium may also be used to perform heat exchange with the heat exchange circulation medium to heat up or cool down the power generation circulation medium through the heat exchange process.

[0068] Specifically, the power generation module 101 uses the temperature difference between warm shallow seawater and deep cold seawater to generate seawater temperature difference power. In the peak period of electricity consumption, the power generation module 101 can generate excess power, which can be used to drive the compression and expansion module 105 to compress and / or expand the heat exchange cycle working fluid in the pipeline, so as to convert the excess power generation of the power generation module 101 into internal energy (cold energy / heat energy) in the heat exchange cycle working fluid through the compression and expansion module 105; and then the internal energy in the heat exchange cycle working fluid is transferred to the cold storage / release module 109 for storage through the heat exchange cycle working fluid and the cold storage working fluid, and / or, the internal energy in the heat exchange cycle working fluid is transferred to the heat storage / release module 107 for storage through the heat exchange cycle working fluid and the heat storage working fluid, so as to realize the storage of the excess power generation of the power generation module 101 in the form of internal energy of the heat exchange working fluid in the cold storage / release module 109 and / or the heat storage / release module 107.

[0069] During peak electricity consumption periods, the cold storage / release module 109 can transfer the cold energy in the cold storage / release module 109 to the heat exchange circulation working fluid by heat exchange between the heat exchange circulation working fluid and the cold storage working fluid, and / or the heat storage / release module 107 can transfer the heat energy in the heat storage / release module 107 to the heat exchange circulation working fluid by heat exchange between the heat exchange circulation working fluid and the heat storage working fluid, thereby adjusting the temperature of the heat exchange circulation working fluid, so that the heat exchange circulation working fluid can be compressed and expanded based on the released cold energy and / or heat energy, so as to ultimately drive the engine to generate electricity.

[0070] Furthermore, during peak electricity consumption periods, the heat exchange circulating medium can also be used to heat the power generation circulating medium in the power generation module 101 through heat exchange, so as to promote the seawater temperature difference power generation process of the power generation module 101.

[0071] In order to more clearly illustrate the beneficial technology of the technical solution of the present application, some specific implementation methods of the present application are exemplified by applying the energy island system of the present application to the system shown in Figure 2. Figures 3 and 4 are schematic diagrams of the structure of the heat exchange unit in two different drawing directions. It should be understood that the naming of the heat exchange unit structure in Figures 3 and 4 is only an exemplary way to improve readability and does not constitute a limitation on the technical solution of the present application. Optionally, each heat exchange unit described in the present application may include a heat exchanger.

[0072] In one embodiment, as shown in FIG. 2 , the heat exchange module includes a first heat exchange unit 25 , a second heat exchange unit 40 , a third heat exchange unit 53 , a fourth heat exchange unit 56 , a fifth heat exchange unit 6 and a circulating gas source 17 ; wherein,

[0073] One end of the first heat exchange pipeline of the first heat exchange unit 25 is connected to the other end of the second heat exchange pipeline of the second heat exchange unit 40, the other end of the first heat exchange pipeline of the third heat exchange unit 53, and the other end of the second heat exchange pipeline of the fourth heat exchange unit 56 through pipelines; the other end of the first heat exchange pipeline of the first heat exchange unit 25 is connected to the circulating gas source 17; a charging regulating valve 14 is also provided on the connecting pipeline between the other end of the first heat exchange pipeline of the first heat exchange unit and the circulating gas source; the circulating gas source 17 stores heat exchange circulating working medium;

[0074] The other end of the second heat exchange pipeline of the second heat exchange unit 40 is connected to the other end of the first heat exchange pipeline of the third heat exchange unit 53 and the other end of the second heat exchange pipeline of the fourth heat exchange unit 56 through pipelines;

[0075] One end of the first heat exchange pipeline of the third heat exchange unit 53 is connected to the other end of the first heat exchange pipeline of the fourth heat exchange unit 56 and the other end of the second heat exchange pipeline of the fourth heat exchange unit 56 through a pipeline; the other end of the first heat exchange pipeline of the third heat exchange unit 53 is connected to the other end of the first heat exchange pipeline of the fourth heat exchange unit 56 and the other end of the second heat exchange pipeline of the fourth heat exchange unit 56 through a pipeline; one end of the second heat exchange pipeline of the third heat exchange unit 53 is provided with a second regulating valve 52;

[0076] One end of the first heat exchange pipeline of the fourth heat exchange unit 56 is connected to the other end of the first heat exchange pipeline of the fifth heat exchange unit 6 through a pipeline;

[0077] A first regulating valve 39 is further provided on the connecting pipeline at the other end of the first heat exchange pipeline of the second heat exchange unit 40 .

[0078] Wherein, the first heat exchange pipeline and the second heat exchange pipeline in the above-mentioned heat exchange unit are connected by heat exchange to perform heat exchange between the heat exchange media in the two pipelines.

[0079] Specifically, the heat exchange circulating working fluid in the heat exchange module can perform heat exchange with the cold storage working fluid in the cold storage / release module through the first heat exchange unit 25, perform heat exchange with the power generation circulating working fluid in the power generation module through the second heat exchange unit 40 and the third heat exchange unit 53, perform heat exchange with the heat exchange circulating working fluid in another pipeline of the heat exchange module through the fourth heat exchange unit 56, and perform heat exchange with the heat storage working fluid in the heat storage / release module through the fifth heat exchange unit 6.

[0080] Furthermore, the other end of the circulating gas source also includes an air charging valve 18, which is used to charge the circulating gas source from the outside when the circulating gas source is short of gas.

[0081] In one embodiment, please refer to FIG. 2 , the cold storage / release module includes a medium-temperature cold storage unit 28 and a low-temperature cold storage unit 20 , and the heat storage / release module includes a medium-temperature heat storage unit 8 and a high-temperature heat storage unit 2 ; wherein,

[0082] One end of the second heat exchange pipeline of the first heat exchange unit 25 is connected to the first end of the medium temperature cold storage unit 28 through a pipeline, and the other end of the second heat exchange pipeline of the first heat exchange unit 25 is connected to one end of the low temperature cold storage unit 20 and the second end of the medium temperature cold storage unit 28 through pipelines;

[0083] One end of the first heat exchange pipeline of the fifth heat exchange unit 6 is connected to the first end of the medium temperature heat storage unit 8 and the other end of the high temperature heat storage unit 2 through pipelines; the other end of the first heat exchange pipeline of the fifth heat exchange unit 6 is connected to the second end of the medium temperature heat storage unit 8 through a pipeline.

[0084] The heat exchange medium in the first heat exchange pipeline of the first heat exchange unit 25 is a heat exchange circulation medium, and the heat exchange medium in the second heat exchange pipeline of the first heat exchange unit 25 is a cold storage medium. The medium-temperature cold storage unit 28 can be used to store the cold storage medium to be cooled, and the low-temperature cold storage unit 20 can be used to store the cold storage medium that has been cooled by heat exchange. Optionally, the cold storage medium can be hexane, which is not limited in this application.

[0085] The heat exchange medium in the first heat exchange pipeline of the fifth heat exchange unit 6 is a heat storage medium, and the heat exchange medium in the second heat exchange pipeline of the fifth heat exchange unit 6 is a heat exchange circulation medium. The medium-temperature heat storage unit 8 can be used to store the heat storage medium to be heated, and the high-temperature cold storage unit can be used to store the heat storage medium that has been heated by heat exchange. Optionally, the heat storage medium can be molten salt, which is not limited in this application.

[0086] Specifically, the heat exchange circulating working fluid in the heat exchange module and the cold storage working fluid in the cold storage / release module exchange heat through the first heat exchange unit 25; the heat exchange circulating working fluid in the heat exchange module and the heat storage working fluid in the heat storage / release module exchange heat through the fifth heat exchange unit 6.

[0087] In one embodiment, please refer to FIG. 2 , the cold storage / release module further includes a cold energy heat exchange unit 19 ; the heat storage / release module further includes a heat energy heat exchange unit 1 ;

[0088] One end of the first heat exchange pipeline of the cold energy heat exchange unit 19 is connected to the other end of the low temperature energy storage unit; the other end of the first heat exchange pipeline of the cold energy heat exchange unit 19 is connected to the third end of the medium temperature energy storage unit;

[0089] One end of the second heat exchange pipeline of the thermal energy heat exchange unit 1 is connected to the third end of the medium-temperature energy storage unit; the other end of the second heat exchange pipeline of the thermal energy heat exchange unit 1 is connected to one end of the high-temperature energy storage unit.

[0090] The heat exchange medium in the first heat exchange pipeline of the cold energy heat exchange unit 19 is the cold storage medium, and the heat exchange medium in the second heat exchange pipeline of the cold energy heat exchange unit 19 is the external heat exchange medium. The cold energy heat exchange unit 19 can be used to output the cold energy stored in the cold storage / release module to the outside.

[0091] The heat exchange medium in the first heat exchange pipeline of the heat exchange unit 1 is an external heat exchange medium, and the heat exchange medium in the second heat exchange pipeline of the heat exchange unit 1 is a heat storage medium. The heat exchange unit 1 can be used to output the heat energy stored in the heat storage / release module to the outside.

[0092] In one embodiment, referring to FIG. 2 , the compression-expansion module further includes a first compression unit 60, a second compression unit 9, a first expansion unit 90, a second expansion unit 11, a driving unit 61 and a power generation unit; wherein,

[0093] One end of the first compression unit 60 is connected to one end of the second heat exchange pipeline of the fifth heat exchange unit 6 through a pipeline; the other end of the first compression unit 60 is connected to one end of the second heat exchange pipeline of the fourth heat exchange unit 56;

[0094] One end of the first expansion unit 90 is connected to the other end of the first heat exchange pipeline of the third heat exchange unit 53 and the other end of the first heat exchange pipeline of the fourth heat exchange unit 56 through a pipeline; the other end of the first expansion unit 90 is connected to the other end of the first heat exchange pipeline of the first heat exchange unit 25 through a pipeline; the first one-way valve 82 is provided on the pipeline connected to the other end of the first expansion unit 90, so that the heat exchange cycle working medium flows out from the other end of the first expansion unit 90;

[0095] One end of the second compression unit 9 is connected to the other end of the first heat exchange pipeline of the third heat exchange unit 53 and the other end of the first heat exchange pipeline of the fourth heat exchange unit 56 through a pipeline; the other end of the second compression unit 9 is connected to the other end of the first heat exchange pipeline of the first heat exchange unit 25 through a pipeline;

[0096] One end of the second expansion unit 11 is connected to one end of the second heat exchange pipeline of the fifth heat exchange unit 6 through a pipeline; the other end of the second expansion unit 11 is connected to one end of the second heat exchange pipeline of the fourth heat exchange unit 56 through a pipeline; a second one-way valve 83 is provided on the pipeline connected to the other end of the second expansion unit 11, so that the heat exchange cycle working medium flows out from the other end of the second expansion unit 11;

[0097] The driving unit 61 is electrically connected to the power output end of the power generation module, and the power output end of the driving unit 61 is connected to the first compression unit 60. The driving unit 61 is used to drive the first compression unit 60 to compress the heat exchange cycle working medium using the excess power generated by the power generation module;

[0098] The first compression unit 60 is connected to the first expansion unit 90 via a coupling, and the second expansion unit 11 is connected to the second compression unit 9 via a coupling; the power generation unit 12 is connected to the second expansion unit 11 to utilize the second expansion unit 11 to generate power.

[0099] Wherein, illustratively, the first compression unit 60 and the second compression unit 9 may include a compressor, the first expansion unit 90 and the second expansion unit 11 may include an expander, the drive unit 61 may include a motor, and the power generation unit may include a generator. It is understood that the first compression unit 60 connected by a coupling has the same rotational speed as the first expansion unit 90; the second compression unit 9 connected by a coupling has the same rotational speed as the second expansion unit 11.

[0100] Specifically, the first compression unit 60 and the second compression unit 9 can be used to compress and heat the heat exchange cycle medium, while the heat exchange cycle medium can perform work externally to cool down in the first expansion unit 90 and the second expansion unit 11 .

[0101] In one embodiment, referring to FIG. 2 , the power generation module includes a condensing heat exchange unit 41, an evaporating heat exchange unit 44, a cold water pump 35, a warm water pump 49, a circulating medium pump 45, a turbine 30, a first power generation circulation branch, a second power generation circulation branch, and a generator 29; wherein,

[0102] The cold water pump 35 is connected to the other end of the second heat exchange pipeline of the condensing heat exchange unit 41 through a pipeline; the warm water pump 49 is connected to one end of the first heat exchange pipeline of the evaporating heat exchange unit 44 through a pipeline;

[0103] One end of the first heat exchange pipeline of the condensing heat exchange unit 41 is connected to one end of the second heat exchange pipeline of the evaporating heat exchange unit 44 through a pipeline through a first power generation circulation branch; the other end of the second heat exchange pipeline of the evaporating heat exchange unit 44 is connected to one end of the turbine 30 through a pipeline, and the other end of the turbine 30 is connected to the other end of the first heat exchange pipeline of the condensing heat exchange unit 41 through the second power generation circulation branch; the first power generation circulation branch is provided with a circulating working fluid pump 45; the rotating shaft of the turbine 30 is connected to the generator 29;

[0104] One end of the first heat exchange pipeline of the condensing heat exchange unit 41 is connected to one end of the first heat exchange pipeline of the second heat exchange unit 40; the other end of the first heat exchange pipeline of the condensing heat exchange unit 41 is connected to the other end of the first heat exchange pipeline of the second heat exchange unit 40;

[0105] One end of the second heat exchange pipeline of the evaporative heat exchange unit 44 is connected to one end of the second heat exchange pipeline of the third heat exchange unit 53 ; the other end of the second heat exchange pipeline of the evaporative heat exchange unit 44 is connected to the other end of the second heat exchange pipeline of the third heat exchange unit 53 .

[0106] It should be understood that the heat exchange medium in the first heat exchange pipeline of the condensing heat exchange unit 41 is a power generation cycle medium, and the heat exchange medium in the second heat exchange pipeline of the condensing heat exchange unit 41 is deep cold seawater for condensation. The heat exchange medium in the first heat exchange pipeline of the evaporating heat exchange unit 44 is shallow seawater for heating, and the heat exchange medium in the second heat exchange pipeline of the evaporating heat exchange unit 44 is a power generation cycle medium. The cold water pump 35 is connected to the external seawater and can be used to pump deep cold seawater into the condensing heat exchange unit 41; the warm water pump 49 is connected to the external seawater and can be used to pump shallow seawater with a higher temperature than deep cold seawater into the evaporating heat exchange unit 44.

[0107] Specifically, when the power generation module generates electricity, the process of generating electricity by using the temperature difference of seawater may include the following steps: the cold water pump 35 extracts deep cold seawater (temperature is about 4-7°C), and after the deep cold seawater enters the condensation heat exchange unit 41 and exchanges heat with the power generation cycle working fluid, the power generation cycle working fluid in the condensation heat exchange unit 41 is condensed from gas to liquid; the power generation cycle working fluid enters the evaporation heat exchange unit 44 after being pressurized by the circulating working fluid pump 45; the warm water pump 49 extracts shallow seawater (temperature is about 25-30°C), and after heat exchange with the power generation cycle working fluid in the evaporation heat exchange unit 44, the power generation cycle working fluid in the evaporation heat exchange unit 44 is evaporated into gas; then the power generation cycle working fluid enters the turbine 30 to perform work, thereby being able to drive the generator 29 to operate and generate electricity. It can be understood that the power generation cycle working fluid may include heat exchange working fluids such as propane and ammonia, which are not limited in this application.

[0108] Further, in one of the embodiments, taking the cold storage medium as hexane, the heat storage medium as molten salt, and the circulating gas source 17 as a circulating air supplement tank as an example, as shown in FIG5, sensors (instruments) for measuring the physical parameters of each heat exchange medium can also be set on the connecting pipeline of the energy island system. It should be understood that in FIG5, the instrument marked with "T" is a temperature sensor, which can be used to measure the temperature of the heat exchange medium at the location of the sensor; the instrument marked with "P" is a pressure sensor, which can be used to measure the pressure of the heat exchange medium at the location of the sensor; the instrument marked with "F" is a flow sensor, which can be used to measure the flow of the heat exchange medium at the location of the sensor. It should be understood that in order to improve the visibility of the image so that it is easier for technicians in this field to understand, the sensors set in FIG5 are no longer marked. It can be understood that the setting position of each sensor in FIG5 can also include other setting methods, and the setting method of other sensor positions should also fall within the scope of protection of this application if it measures the relevant physical quantities of the same system module or system unit.

[0109] In one embodiment, as shown in FIG6 , the present application further provides an energy island control method, which is applied to the energy island system described in any of the above embodiments; the method comprises:

[0110] If it is during the off-peak period, perform the following steps:

[0111] Step S601, cutting off the pipeline connections between the heat exchange module and the power generation module, between the heat exchange module and the cold storage / release module, and between the heat exchange module and the heat storage / release module;

[0112] Step S603, utilizing the surplus power generated by the power generation module to drive the compression and expansion module to perform compression and expansion operations on the heat exchange circulation medium;

[0113] Step S605, if the heat exchange cycle working fluid meets the preset temperature condition, the pipeline connection between the heat exchange module and the power generation module, and / or the heat exchange module and the cold storage / release module, and / or the heat exchange module and the heat storage / release module is restored to store excess power generation in the form of heat energy and / or cold energy.

[0114] Exemplarily, taking the application of the above-mentioned energy island control method to the energy island system as shown in Figure 2 as an example, the pipeline of the energy island system shown in Figure 2 also includes corresponding valves. It can be understood that the valves in Figure 2 are only an exemplary setting method. The setting of the valve position of the present application is not limited to the valve setting method of the energy island system described in Figure 2. Other forms of valve position setting methods can also be used, as long as the valve position setting can realize the steps of the energy island control method described in the present application.

[0115] Specifically, in one embodiment, taking the example of the system storing the excess electric energy generated by the power generation module in the cold storage / release module and the heat storage / release module during the off-peak period of electricity consumption, an exemplary operation process is as follows:

[0116] ① Close valves 65, 10, 67, 58, 54, 76, 77, 78, 75, 55, 27, 13, 3, 7 to cut off the pipeline connections between the heat exchange module and the power generation module, between the heat exchange module and the cold storage / release module, between the heat exchange module and the heat storage / release module, between the heat exchange module and the second compression unit of the compression-expansion module, and between the heat exchange module and the second expansion unit of the compression-expansion module;

[0117] ② Open the remaining valves of the system shown in Figure 2, and the air (heat exchange cycle medium) stored in the circulating air source 17 enters the heat exchange module and the compression cycle module. The excess power generated by the generator 29 drives the motor 61 to rotate, and the heat exchange module and the compression cycle module start working.

[0118] Specifically, the air passes through the first heat exchange unit 25, the fourth heat exchange unit 56, the first compression unit 60, the fifth heat exchange unit 6, the fifth heat exchange unit 56, the first expansion unit 90, and the first heat exchange unit 25 in sequence, forming a heat exchange cycle in which the heat exchange cycle working medium flows. During the cycle, the circulating air flow input from the other end of the first heat exchange pipeline of the first heat exchange unit is monitored by a flow sensor, and the opening of the charging regulating valve 14 is adjusted to stabilize the air flow at the design value.

[0119] The air flow rate output by the circulating air source is monitored by a flow sensor. A pressure sensor is also provided in the circulating air source 17. When the pressure reading of the pressure sensor drops to 0.1 MPa, the valve 16 is closed and the circulating air source 17 stops charging.

[0120] ③ During the air circulation process, the first temperature of the circulating air input to the other end of the first heat exchange pipeline of the first heat exchange unit 25 is monitored by a temperature sensor. When the first temperature drops to 4°C, the valve 27 is opened, and the cold storage medium in the medium-temperature cold storage unit is input to one end of the second heat exchange pipeline of the first heat exchange unit 25, so as to absorb the cold (cold energy) in the circulating air through the cold storage medium.

[0121] The cold storage medium first circulates between the first heat exchange unit 25 and the medium-temperature cold storage unit 28. When the temperature sensor detects that the temperature of the cold storage medium output from the other end of the second heat exchange pipeline of the first heat exchange unit 25 drops to -70°C, the valve 26 is closed and the valve 13 is opened, so that the cold storage medium is cooled and then enters the low-temperature cold storage unit 20 for storage.

[0122] ④ When the temperature sensor detects that the circulating air temperature output from one end of the first heat exchange pipeline of the first heat exchanger is lower than 8°C, the valve 73 is closed and the valves 77, 78 and 39 are opened. The circulating air enters the second heat exchange unit 40 for heat exchange to cool the power generation circulating medium of the power generation module.

[0123] The flow rate at the other end of the first heat exchange pipeline of the second heat exchange unit 40 is monitored by a flow sensor to control the opening of the first regulating valve 39. The flow rate of the deep cold seawater input at the other end of the second heat exchange pipeline of the condensing heat exchange unit 41 is monitored by a flow sensor, and the flow rate is adjusted by controlling the frequency of the cold water pump 35.

[0124] Specifically, during the off-peak period of electricity consumption, the control method of the power generation module and the heat exchange module further includes:

[0125] According to the temperature and pressure of the power generation cycle working fluid flowing out of the other end of the turbine 30, the enthalpy value of the power generation cycle working fluid flowing out of the other end of the turbine 30 is calculated. ,

[0126] According to the temperature and pressure of the power generation cycle working fluid flowing out of one end of the first heat exchange pipeline of the second heat exchange unit, the enthalpy value of the power generation cycle working fluid flowing out from one end of the first heat exchange pipeline of the condensing heat exchange unit 41 and one end of the first heat exchange pipeline of the second heat exchange unit 40 is calculated. .

[0127] According to the following formula, the operating frequency of the variable frequency cold water pump 35 is adjusted to control the input flow rate of the deep cold seawater input to the condensing heat exchange unit, and the opening of the first regulating valve 39 is controlled to adjust the input flow rate of the power generation circulation medium flowing from the other end of the first heat exchange pipeline of the second heat exchange unit 40, thereby controlling the temperature of the heat exchange circulation medium flowing out of one end of the second heat exchange pipeline of the second heat exchange unit: and the second enthalpy Keep at set value:

[0128]

[0129]

[0130] in, is the temperature of the heat exchange cycle working fluid flowing out from one end of the second heat exchange pipeline of the second heat exchange unit, is the temperature of the heat exchange cycle working medium flowing in from the other end of the second heat exchange pipeline of the second heat exchange unit, is the temperature of the heat exchange circulating medium flowing into the other end of the first heat exchange pipeline of the first heat exchange unit, is the specific heat capacity of the working fluid in the heat exchange cycle, is the flow rate of the power generation cycle working fluid flowing in from the other end of the first heat exchange pipeline of the second heat exchange unit, is the temperature of the deep cold seawater flowing out from one end of the second heat exchange pipeline of the condensing heat exchange unit, is the temperature of the deep cold seawater flowing in from the other end of the second heat exchange pipeline of the condensing heat exchange unit, is the flow rate of deep cold seawater flowing in from the other end of the second heat exchange pipeline of the condensing heat exchange unit, is the specific heat capacity of deep cold seawater, is the flow rate of the power generation cycle working medium on the second power generation cycle branch, is the first enthalpy value, is the second enthalpy value.

[0131] ⑤ When the temperature of the heat exchange circulating medium flowing into one end of the second heat exchange pipeline of the fifth heat exchange unit 6 is higher than 280°C, valves 7 and 5 are opened to allow the heat storage medium in the medium-temperature heat storage unit to enter the fifth heat exchange unit 6 to exchange heat with the circulating air, and circulate between the medium-temperature heat storage unit 8 and the fifth heat exchange unit 6; when the temperature of the heat storage medium at one end of the first heat exchange pipeline of the fifth heat exchange unit 6 is higher than 560°C, valve 5 is closed and valve 3 is opened to allow the heat storage medium to flow from the medium-temperature heat storage unit 8 through the fifth heat exchange unit 6 into the high-temperature heat storage unit 2.

[0132] ⑥ When the temperature of the heat exchange circulating medium flowing out of the other end of the first heat exchange pipeline of the fourth heat exchange unit is higher than 21°C, valve 69 is closed, valves 55, 75, and 52 are opened, and the circulating air enters the third heat exchange unit 53 for heat exchange to heat the circulating working fluid of the power generation subsystem; the opening of the second regulating valve 52 and the operating frequency of the variable frequency warm water pump 49 are controlled to maintain the enthalpy value of the power generation circulating working fluid input at one end of the turbine 30 and the air temperature T71 to the set value.

[0133] Specifically, during the off-peak period of electricity consumption, the control method of the power generation module and the heat exchange module further includes:

[0134] According to the temperature and pressure of the power generation cycle working fluid input at one end of the turbine 30, the third enthalpy value of the power generation cycle working fluid input at one end of the turbine 30 is calculated. ;

[0135] According to the temperature and pressure of the power generation circulating medium flowing out of one end of the circulating medium pump 45, the fourth enthalpy value of the power generation circulating medium flowing into the third heat exchange unit 53 and the evaporation heat exchange unit 44 is calculated. ;

[0136] According to the following formula, the operating frequency of the warm water pump 49 is adjusted to control the input flow rate of the shallow seawater input to the evaporative heat exchange unit, and the input flow rate of the power generation circulation medium flowing from one end of the second heat exchange pipeline of the third heat exchange unit 53 is adjusted by controlling the opening of the second regulating valve 52, thereby controlling the temperature of the heat exchange circulation medium at the other end of the first heat exchange pipeline of the third heat exchange unit: and the third enthalpy Keep at set value:

[0137]

[0138]

[0139] in, is the temperature of the heat exchange circulating medium at one end of the first heat exchange pipeline of the third heat exchange unit, is the temperature of the heat exchange circulating medium at the other end of the first heat exchange pipeline of the third heat exchange unit, is the flow rate of the heat exchange circulating medium at the other end of the first heat exchange pipeline of the first heat exchange unit, is the flow rate of the power generation circulating medium at one end of the second heat exchange pipeline of the third heat exchange unit, is the temperature of the shallow seawater input at one end of the first heat exchange pipeline of the evaporative heat exchange unit, is the temperature of the shallow seawater flowing out from the other end of the first heat exchange pipeline of the evaporative heat exchange unit, The flow rate of shallow seawater inputted into one end of the first heat exchange pipeline of the evaporative heat exchange unit, is the flow rate of the power generation cycle working fluid flowing into one end of the turbine 30, is the flow rate of the power generation cycle working medium at one end of the second heat exchange pipeline of the third heat exchange unit, is the specific heat capacity of circulating air (heat exchange cycle medium), is the specific heat capacity of shallow seawater.

[0140] For example, in one embodiment, during the off-peak period of electricity consumption, the motor 61 drives the first compression unit 60 and the first expansion unit 77 to rotate, and the circulating air (heat exchange circulating medium) enters the first compression unit 60 and is heated and pressurized (the temperature reaches 570°C); then the circulating air is input into the fifth heat exchange unit 6 to transfer the heat to the heat storage medium, and then enters the fourth heat exchange unit 56 for heat exchange to further reduce the temperature; the circulating air then enters the third heat exchange unit 53 to transfer the heat to the power generation circulating medium; then enters the first expansion unit 77 to perform work to further reduce the temperature (the temperature is reduced to -70°C) and pressure; the circulating air is then input into the first heat exchange unit 25 to transfer the cold energy to the cold storage medium, and then enters the second heat exchange unit 40 to cool the power generation circulating medium; the circulating air then enters the fourth heat exchange unit 56 for heat exchange to increase the temperature; and then enters the first compression unit 60 to complete a cycle. It can be understood that the power generation module, compression expansion module, heat exchange module, cold storage / release module and heat storage / release module are mutually coupled through electric heat, which can realize the cascade utilization of energy of different grades, thereby saving electricity for water pumps, and converting excess power generation into thermal energy stored in the heat storage / release module, or into cold energy stored in the cold storage / release module.

[0141] Furthermore, in one embodiment, the energy island control method further comprises:

[0142] When the system stops storing energy, perform the following steps:

[0143] Cut off valve 22 and open valves 14 and 16 to convey air back to the circulating air source;

[0144] When the pressure in the circulating gas source reaches a preset pressure value, the valve 16 is cut off to stop the inflation of the circulating gas source; wherein the preset pressure value may include 1-2 MPa;

[0145] Closing the electrical connection between the drive unit (motor) 61 and the power generation module, and stopping the power generation module from supplying power to the compression expansion module;

[0146] Close valves 52, 77, 78, 39, 55, and 75 to cut off the pipeline connection between the heat exchange module and the power generation module;

[0147] Close valves 3, 7, 27, and 13 to cut off the pipeline connections between the heat exchange module and the cold storage / release module and between the heat exchange module and the heat storage / release module;

[0148] Close valves 63, 64, 59, and 66 to cut off the pipeline connection between the heat exchange module and the compression expansion module.

[0149] In one embodiment, as shown in FIG7 , the method further includes:

[0150] If it is during the preset peak power consumption period, perform the following steps:

[0151] Step S701, activating the cold storage / release module and the heat storage / release module to release the stored cold energy and heat energy;

[0152] Step S703, based on the released cold energy and heat energy, the compression expansion module is made to perform work and generate electricity;

[0153] Step S705, connecting the work power generation of the compression-expansion module and the temperature difference power generation of the power generation module to the grid for output.

[0154] Furthermore, in one of the embodiments, the method further includes: utilizing heat exchange between the heat exchange circulating working fluid and the power generation circulating working fluid of the power generation module to heat the power generation circulating working fluid in the power generation module to promote the seawater temperature difference power generation process of the power generation module.

[0155] Specifically, in one embodiment, taking the example of the energy island system releasing the cold energy stored in the cold storage / release module and the heat energy stored in the heat storage / release module to increase power generation during the peak power consumption period, an exemplary system operation process is as follows:

[0156] ① Close valves 63, 64, 59, 66, 55, 75, 77, 78, 39, 54, 76, and 52 to cut off the pipeline connections between the heat exchange module and the first compression unit of the compression-expansion module, between the heat exchange module and the first expansion unit of the compression-expansion module, and between the heat exchange module and the power generation module;

[0157] ② Open valves 67, 10, 65, and 58 to connect the pipelines between the heat exchange module and the second expansion unit of the compression-expansion module and between the heat exchange module and the second compression unit of the compression-expansion module.

[0158] ③ Open valves 13, 27, 3, and 7 to connect the pipelines between the heat exchange module and the cold storage / release module and between the heat exchange module and the heat storage / release module.

[0159] ④ Open valves 14 and 16, and the circulating gas source starts to inflate the heat exchange system and the compression expansion system. Specifically, the flow sensor monitors the flow rate of the heat exchange cycle working fluid output by the circulating gas source, and controls the circulation flow rate through the inflation regulating valve 14. For example, when the pressure in the circulating gas source drops to 0.1 MPa, the valves 16 and 14 are closed to stop inflation.

[0160] ⑤ When the temperature of the heat exchange circulating medium at the other end of the second heat exchange pipeline of the fourth heat exchange unit reaches above 20°C, close valve 70 and open valves 54, 76 and 52 to couple the heat exchange module with the power generation module.

[0161] Then, by controlling the opening of the second regulating valve 52 and the operating frequency of the variable frequency warm water pump 49, the temperature of the heat exchange circulating medium at the other end of the first heat exchange pipeline of the third heat exchange unit and the enthalpy value of the power generation circulating medium input at one end of the turbine 30 remain unchanged.

[0162] Specifically, during the peak electricity consumption period, the control method of the power generation module and the heat exchange module includes:

[0163] According to the pressure and temperature of the power generation circulation medium inputted from one end of the turbine 30, the fifth enthalpy value of the power generation circulation medium inputted from one end of the turbine 30 is calculated. ;

[0164] According to the temperature and pressure of the power generation circulating working fluid flowing out of one end of the circulating working fluid pump 45, the sixth enthalpy value of the power generation circulating working fluid flowing into the third heat exchange unit 53 and the evaporation heat exchange unit 44 is calculated. ;

[0165] According to the following formula, the flow rate of the shallow seawater input to the evaporative heat exchange unit is adjusted by adjusting the operating frequency of the variable frequency warm water pump 80, and the flow rate of the power generation cycle medium flowing into one end of the second heat exchange pipeline of the third heat exchange unit is adjusted by controlling the opening of the second regulating valve 52 to control the temperature of the heat exchange cycle medium at the other end of the first heat exchange pipeline of the third heat exchange unit: and the fifth enthalpy Keep at set value:

[0166]

[0167]

[0168] in, is the temperature of the heat exchange circulation medium at one end of the first heat exchange pipeline of the third heat exchange unit, is the temperature of the heat exchange circulation medium at the other end of the first heat exchange pipeline of the third heat exchange unit, is the flow rate of the heat exchange circulating medium at the other end of the first heat exchange pipeline of the first heat exchange unit, The flow rate of the power generation circulating medium at one end of the second heat exchange pipeline of the third heat exchange unit, is the temperature of the shallow seawater flowing into one end of the first heat exchange pipeline of the condensing heat exchange unit, The temperature of the shallow seawater flowing out of the other end of the first heat exchange pipe of the condensing heat exchange unit, is the flow rate of shallow seawater flowing into one end of the first heat exchange pipeline of the condensing heat exchange unit, is the flow rate of the power generation circulation medium flowing into one end of the turbine 30, is the specific heat capacity of circulating air (heat exchange circulating medium), is the specific heat capacity of shallow seawater, is the fifth enthalpy value, is the sixth enthalpy value.

[0169] Illustratively, in one of the embodiments, during the peak electricity consumption period, taking the circulating air as the heat exchange cycle working medium, the circulating air is heated to 560°C by the heat storage medium after passing through the fifth heat exchange unit 6; then the circulating air enters the second expansion unit 11 to expand and do work to drive the power generation unit to generate electricity, and the temperature and pressure of the circulating air decrease; then, the circulating air enters the fourth heat exchange unit 56 again, and the circulating air is cooled; then the circulating air enters the third heat exchange unit 53, and the heat is transferred to the power generation circulating working medium; the circulating air enters the first heat exchange unit 25 again, and exchanges heat with the cold storage medium, and the temperature of the circulating air is further reduced to -50°C; then the circulating air enters the first compression unit 9 again, and the temperature and pressure of the circulating air increase; then the circulating air enters the fourth heat exchange unit 56 again for heat exchange, and the temperature of the circulating air further increases; then, the circulating air enters the fifth heat exchange unit 6 again to absorb the heat of the heat storage medium, thereby completing a cycle. It can be understood that the power generation module, the compression expansion module, the heat exchange module, the cold storage / release module and the heat storage / release module are mutually coupled through electric heat, so that the cold energy and heat energy stored in the cold storage / release module and the heat storage / release module can be released to be converted into electrical energy, and this part of the electrical energy can be connected to the grid with the electrical energy generated by the seawater temperature difference of the power generation module and then sent out for power generation.

[0170] Furthermore, in one embodiment, the energy island control method further comprises:

[0171] When the system stops discharging energy, perform the following steps:

[0172] Close valve 67 and open valves 14 and 16 to transport the circulating air (heat exchange circulating medium) back to the circulating air replenishing tank (circulating air source);

[0173] When it is detected that the pressure in the circulating air replenishment tank reaches a preset pressure value, the valve 16 is cut off to stop the inflation of the circulating air replenishment tank; wherein the preset pressure value may include 1-2 MPa;

[0174] Cut off the connection between the power generation unit 12 and the output circuit to stop outputting power to the outside world;

[0175] Close valves 54, 76, and 52 to cut off the pipeline connection between the heat exchange module and the power generation module;

[0176] Close valves 3, 7, 27, and 13 to cut off the pipeline connections between the heat exchange module and the cold storage / release module and the heat storage / release module;

[0177] Close valves 10, 65, and 58 to cut off the pipeline connections between the heat exchange module and the second compression unit of the compression-expansion module and between the heat exchange module and the second expansion unit of the compression-expansion module.

[0178] Furthermore, in one of the embodiments, when the outside world needs to utilize the cold energy or heat energy stored in the cold storage / release module or the heat storage / release module, the second heat exchange pipeline of the cold energy heat exchange unit 19 or the first heat exchange pipeline of the heat energy heat exchange unit 1 can be connected in series with a plurality of heat exchange units of different levels for output, wherein each level of the heat exchange unit can control the temperature range of the output cold energy or heat energy by selecting a heat exchanger of a different model, so as to perform multi-stage heat exchange cascade utilization of cold energy or heat energy;

[0179] Optionally, in one of the embodiments, the cold energy heat exchange unit of the cold storage / release module may also be connected to a phase change heat storage device.

[0180] Optionally, in one of the embodiments, the thermal energy heat exchange unit of the heat storage / release module may also be connected to a phase change heat exchanger.

[0181] Exemplarily, it can be understood that the cold energy heat exchange unit of the cold storage / release module can achieve different grades of cold energy delivery through heat exchange with different refrigerants (such as water, ice slurry, organic solvents, cold storage materials, etc.); the thermal energy heat exchange unit of the heat storage / release module can achieve different grades of thermal energy delivery through heat exchange with different heat media (such as water, steam, heat storage materials, etc.).

[0182] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a portion of the steps involved in the above-mentioned embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the steps or stages in other steps.

[0183] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0184] In one embodiment, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method described in any of the above embodiments are implemented.

[0185] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0186] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0187] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0188] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An energy island system, characterized in that: It includes a power generation module, a heat exchange module, a compression expansion module, a cold storage / release module and a heat storage / release module; The power generation module is used to generate electricity using the temperature difference energy of seawater; The compression-expansion module is electrically connected to the power generation module and is connected to the heat exchange module through a pipeline, and is used to compress and / or expand the heat exchange cycle working medium; wherein the heat exchange cycle working medium is used to circulate in the pipelines of the compression-expansion module and the power generation module; The heat exchange module is connected to the power generation module, the cold storage / release module and the heat storage / release module through pipelines; wherein the cold storage / release module is used to store excess power generation in the form of cold energy during the off-peak period of electricity consumption, and release the cold energy during the peak period of electricity consumption; the cold storage / release module is used to store the excess power generation in the form of heat energy during the off-peak period of electricity consumption, and release the heat energy during the peak period of electricity consumption.

2. The system according to claim 1, characterized in that The heat exchange module includes a first heat exchange unit, a second heat exchange unit, a third heat exchange unit, a fourth heat exchange unit, a fifth heat exchange unit and a circulating gas source; wherein, One end of the first heat exchange pipeline of the first heat exchange unit is connected to the other end of the second heat exchange pipeline of the second heat exchange unit, the other end of the first heat exchange pipeline of the third heat exchange unit, and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; the other end of the first heat exchange pipeline of the first heat exchange unit is connected to the circulating gas source; a charging regulating valve is also provided on the connecting pipeline between the other end of the first heat exchange pipeline of the first heat exchange unit and the circulating gas source; the circulating gas source stores heat exchange circulating working medium; The other end of the second heat exchange pipeline of the second heat exchange unit is connected to the other end of the first heat exchange pipeline of the third heat exchange unit and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; One end of the first heat exchange pipeline of the third heat exchange unit is connected to the other end of the first heat exchange pipeline of the fourth heat exchange unit and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; the other end of the first heat exchange pipeline of the third heat exchange unit is connected to the other end of the first heat exchange pipeline of the fourth heat exchange unit and the other end of the second heat exchange pipeline of the fourth heat exchange unit through pipelines; one end of the second heat exchange pipeline of the third heat exchange unit is provided with a second regulating valve; One end of the first heat exchange pipeline of the fourth heat exchange unit is connected to the other end of the first heat exchange pipeline of the fifth heat exchange unit through a pipeline; A first regulating valve is also provided on the connecting pipeline at the other end of the first heat exchange pipeline of the second heat exchange unit.

3. The system according to claim 2, characterized in that The cold storage / release module includes a medium-temperature cold storage unit and a low-temperature cold storage unit, and the heat storage / release module includes a medium-temperature heat storage unit and a high-temperature heat storage unit; wherein, One end of the second heat exchange pipeline of the first heat exchange unit is connected to the first end of the medium-temperature cold storage unit through a pipeline, and the other end of the second heat exchange pipeline of the first heat exchange unit is connected to one end of the low-temperature cold storage unit and the second end of the medium-temperature cold storage unit through pipelines respectively; One end of the first heat exchange pipeline of the fifth heat exchange unit is connected to the first end of the medium temperature heat storage unit and the other end of the high temperature heat storage unit through pipelines; the other end of the first heat exchange pipeline of the fifth heat exchange unit is connected to the second end of the medium temperature heat storage unit through a pipeline.

4. The system according to claim 3, characterized in that The cold storage / release module also includes a cold energy heat exchange unit; the heat storage / release module also includes a heat energy heat exchange unit; One end of the first heat exchange pipeline of the cold energy heat exchange unit is connected to the other end of the low temperature energy storage unit; the other end of the first heat exchange pipeline of the cold energy heat exchange unit is connected to the third end of the medium temperature energy storage unit; One end of the second heat exchange pipeline of the thermal energy heat exchange unit is connected to the third end of the medium-temperature energy storage unit; the other end of the second heat exchange pipeline of the thermal energy heat exchange unit is connected to one end of the high-temperature energy storage unit.

5. The system according to claim 4, characterized in that The compression-expansion module further includes a first compression unit, a second compression unit, a first expansion unit, a second expansion unit, a driving unit and a power generation unit; wherein, One end of the first compression unit is connected to one end of the second heat exchange pipeline of the fifth heat exchange unit through a pipeline; the other end of the first compression unit is connected to one end of the second heat exchange pipeline of the fourth heat exchange unit; One end of the first expansion unit is connected to the other end of the first heat exchange pipeline of the third heat exchange unit and the other end of the first heat exchange pipeline of the fourth heat exchange unit through a pipeline; the other end of the first expansion unit is connected to the other end of the first heat exchange pipeline of the first heat exchange unit through a pipeline; a first one-way valve is provided on the pipeline connected to the other end of the first expansion unit to allow the heat exchange cycle working medium to flow out from the other end of the first expansion unit; One end of the second compression unit is connected to the other end of the first heat exchange pipeline of the third heat exchange unit and the other end of the first heat exchange pipeline of the fourth heat exchange unit through a pipeline; the other end of the second compression unit is connected to the other end of the first heat exchange pipeline of the first heat exchange unit through a pipeline; One end of the second expansion unit is connected to one end of the second heat exchange pipeline of the fifth heat exchange unit through a pipeline; the other end of the second expansion unit is connected to one end of the second heat exchange pipeline of the fourth heat exchange unit through a pipeline; a second one-way valve is provided on the pipeline connected to the other end of the second expansion unit to allow the heat exchange cycle working medium to flow out from the other end of the second expansion unit; The driving unit is electrically connected to the power output end of the power generation module, and the power output end of the driving unit is connected to the first compression unit. The driving unit is used to drive the first compression unit to compress the heat exchange cycle working medium using the excess power generated by the power generation module; The first compression unit is connected to the first expansion unit via a coupling, and the second expansion unit is connected to the second compression unit via a coupling; the power generation unit is connected to the second expansion unit to utilize the second expansion unit to generate power.

6. The system according to claim 5, characterized in that The power generation module includes a condensing heat exchange unit, an evaporating heat exchange unit, a cold water pump, a warm water pump, a circulating medium pump, a turbine, a first power generation circulation branch, a second power generation circulation branch and a generator; wherein, The cold water pump is connected to the other end of the second heat exchange pipeline of the condensing heat exchange unit through a pipeline; the warm water pump is connected to one end of the first heat exchange pipeline of the evaporative heat exchange unit through a pipeline; One end of the first heat exchange pipeline of the condensing heat exchange unit is connected to one end of the second heat exchange pipeline of the evaporating heat exchange unit through a pipeline through the first power generation circulation branch; the other end of the second heat exchange pipeline of the evaporating heat exchange unit is connected to one end of the turbine through a pipeline, and the other end of the turbine is connected to the other end of the first heat exchange pipeline of the condensing heat exchange unit through the second power generation circulation branch; the first power generation circulation branch is provided with the circulating working fluid pump; the rotating shaft of the turbine is connected to the generator; One end of the first heat exchange pipeline of the condensing heat exchange unit is connected to one end of the first heat exchange pipeline of the second heat exchange unit; the other end of the first heat exchange pipeline of the condensing heat exchange unit is connected to the other end of the first heat exchange pipeline of the second heat exchange unit; One end of the second heat exchange pipeline of the evaporative heat exchange unit is connected to one end of the second heat exchange pipeline of the third heat exchange unit; the other end of the second heat exchange pipeline of the evaporative heat exchange unit is connected to the other end of the second heat exchange pipeline of the third heat exchange unit.

7. An energy island control method, characterized in that: Applied to the energy island system according to any one of claims 1 to 6; the method comprises: If it is during the off-peak period, perform the following steps: Cutting off the pipeline connections between the heat exchange module and the power generation module, between the heat exchange module and the cold storage / release module, and between the heat exchange module and the heat storage / release module; Using the surplus power generated by the power generation module to drive the compression and expansion module to perform compression and expansion operations on the heat exchange circulation medium; If the heat exchange cycle working fluid meets the preset temperature condition, the pipeline connection between the heat exchange module and the power generation module, and / or the heat exchange module and the cold storage / release module, and / or the heat exchange module and the heat storage / release module is restored and enabled to store the excess power generation in the form of heat energy and / or cold energy.

8. The method according to claim 7, characterized in that The method further comprises: If it is during the preset peak power consumption period, perform the following steps: Activating the cold storage / release module and the heat storage / release module to release the stored cold energy and the stored heat energy; Based on the released cold energy and heat energy, the compression-expansion module performs work to generate electricity; The work power generation of the compression-expansion module and the temperature difference power generation of the power generation module are connected to the grid for output.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 7 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 8 are implemented.

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