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

Abstract

The application 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. The power generation module generates power by using seawater temperature difference energy. The compression expansion module is electrically connected with the power generation module and is connected with the heat exchange module through a pipeline to compress and / or expand heat exchange circulating working medium. The heat exchange circulating working medium circulates in the 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 a pipeline. The cold storage / release module stores excess power generation in the form of cold energy during a low electricity consumption period and releases the cold energy during a high electricity consumption period. The heat storage / release module stores excess power generation in the form of heat energy during the low electricity consumption period and releases the heat energy during the high electricity consumption period. The energy island system of the application generates power by using stable and abundant seawater temperature difference energy and can be continuously operated in a long-term energy-saving manner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, and in particular to an energy island system, a control method, computer equipment and a storage medium. BACKGROUND

[0002] Under the background of rapid development of global economy, people's demand for energy is increasing, but traditional fossil energy is limited in total amount and pollutes the environment. The ocean accounts for 70% of the earth's surface, and the ocean has abundant renewable energy. The development of ocean energy has become one of the important directions of energy transformation, and offshore energy islands and deep-sea islands have become the jumping-off point and outpost of ocean energy exploration.

[0003] At present, the multi-energy coupling system of offshore energy islands mostly uses offshore wind energy and solar energy as the main energy source, which is greatly affected by weather conditions and environmental factors, and part of the system is not completely independent, still needs to use industrial waste heat or thermal power flue gas to assist system operation. The ocean thermal energy is stable and abundant, and it is an urgent need to use ocean thermal energy to build an offshore energy island system with multi-level energy utilization and long-term energy saving. SUMMARY

[0004] Therefore, it is necessary to provide an energy island system, a control method, computer equipment and a storage medium capable of multi-level energy utilization and long-term energy saving in view of the above technical problems.

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

[0006] The power generation module is used for generating power by using ocean thermal energy;

[0007] The compression and expansion module is electrically connected with the power generation module and connected with the heat exchange module through a pipeline, and is used for compressing and / or expanding a heat exchange circulating working medium; wherein the heat exchange circulating working medium is used for circulating flow in the pipeline of the compression and expansion module and the power generation module;

[0008] The heat exchange module is connected with the power generation module, the cold storage and release module, and the heat storage and release module through a pipeline; wherein the cold storage and release module is used for storing excess power in the form of cold energy during the off-peak period of electricity consumption, and releasing cold energy during the peak period of electricity consumption; and the heat storage and release module is used for storing excess power in the form of heat energy during the off-peak period of electricity consumption, and releasing heat energy during the peak period of electricity consumption.

[0009] In one embodiment, the heat exchange module comprises 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 respectively; the other end of the first heat exchange pipeline of the first heat exchange unit is connected to the circulating gas source; a gas charging adjusting valve is further arranged on the connecting pipeline of 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 respectively;

[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 respectively; 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 respectively; one end of the second heat exchange pipeline of the third heat exchange unit is provided with a second adjusting valve;

[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 adjusting valve is further arranged on the connecting pipeline of the other end of the first heat exchange pipeline of the second heat exchange unit.

[0015] In one of the embodiments, 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 respectively;

[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 respectively, and 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 of the embodiments, the cold storage / release module further includes a cold energy heat exchange unit, and 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, and 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 cold 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 heat 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 heat 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 circulating 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 medium to flow out from the other end of the second expansion unit;

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

[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; and 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 and a first power generation cycle branch; the other end of the second heat exchange pipeline of the evaporating heat exchange unit is connected to one end of a 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 a second power generation cycle branch; the first power generation cycle branch is provided with a circulating working medium pump; and a rotating shaft of the turbine is connected to a power 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; and 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 evaporating heat exchange unit is connected to one end of the second heat exchange pipeline of the third heat exchange unit; and the other end of the second heat exchange pipeline of the evaporating 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 applied to the energy island system as described in the first aspect; the method comprises:

[0034] If it is in a low electricity consumption period, the following steps are performed:

[0035] 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 are cut off;

[0036] The excess power generation amount is used to drive the compression and expansion module to perform compression and expansion operation on the heat exchange circulating medium;

[0037] If the heat exchange circulating working medium meets the preset temperature condition, the pipeline connections between the heat exchange module and the power generation module, and / or between the heat exchange module and the cold storage / release module, and / or between the heat exchange module and the heat storage / release module are restored to be enabled, so that the excess power generation amount is stored in the form of heat energy and / or cold energy.

[0038] In one of the embodiments, the method further comprises:

[0039] If it is in a preset peak electricity consumption period, the following steps are performed:

[0040] The cold storage / release module and the heat storage / release module are enabled to release the stored cold energy and heat energy;

[0041] Based on the released cold energy and heat energy, the compression and expansion module is made to generate power;

[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 and 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, which implements the steps of the method described in the second aspect when the computer program is executed by a processor.

[0045] The above-mentioned energy island system includes a power generation module, a heat exchange module, a compression and expansion module, a cold storage and release module, and a heat storage and release module. The power generation module uses the temperature difference energy of seawater to generate electricity; 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 and release module, and the heat storage and release module through a pipeline; the cold storage and release module is used to store excess power generation in the form of cold energy during low power consumption periods, and release cold energy during peak power consumption periods; the cold storage and release module is used to store excess power generation in the form of heat energy during low power consumption periods, and release heat energy during peak power consumption periods. The energy island of the present application can use the stable and abundant temperature difference energy of seawater to generate electricity, and can operate continuously with long-term energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. 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] Figure 1 is a structural block diagram of an energy island system in one embodiment;

[0048] Figure 2 This is a schematic diagram of the structure of an energy island system in one embodiment;

[0049] Figure 3 For Figure 2 The piping structure diagram of the heat exchange unit shown is drawn horizontally;

[0050] Figure 4 For Figure 2 A schematic diagram of the piping structure of the heat exchange unit drawn longitudinally is shown;

[0051] Figure 5 A schematic diagram of an energy island system structure with sensor locations specified for one embodiment;

[0052] Figure 6 An energy island control method during low power consumption period for one embodiment;

[0053] Figure 7 An energy island control method during peak power consumption period for one embodiment. DETAILED DESCRIPTION

[0054] In order to facilitate the understanding of the application, a more complete and thorough description of the application will be presented below with reference to the accompanying drawings. The drawings presented herein are for the purpose of illustrating embodiments of the application. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

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

[0057] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and / or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0058] It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or connected through an intermediate element. In addition, "connected" in the following embodiments, if there is a transmission of electrical signals or data between the connected objects, should be understood as "electrically connected", "communicatively connected" and the like.

[0059] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It should also be understood that the term "comprising" or "including" or "having" or the like, when used in the following embodiments, specifies the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0060] It should be noted that the term "and / or", only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " generally represents that the front and rear associated objects are in an "or" relationship. For example, the storage / release cold module described in the present application means a module capable of storing or releasing cold energy, and the character " / " in the storage / release cold module table means that the module can realize the functions of storing or releasing cold energy.

[0061] In one embodiment, as shown in Figure 1 The energy island system 100 provided by the present application includes a power generation module 101, a heat exchange module 103, a compression and expansion module 105, a storage / release cold module 109, and a storage / release heat module 107.

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

[0063] The compression and expansion module 105 is electrically connected to the power generation module 101 and connected to the heat exchange module 103 through a pipeline, and is used to compress and / or expand the heat exchange circulating working medium; wherein the heat exchange circulating working medium is used to circulate in the pipeline 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 storage / release cold module 109, and the storage / release heat module 107 through a pipeline; wherein the storage / release cold module 109 is used to store excess power 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 storage / release heat module 109 is used to store excess power 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] The seawater temperature difference power generation utilizes the temperature difference between the surface seawater and the deep seawater. It can be understood that the surface seawater is relatively high in temperature because it directly receives the solar radiation, while the deep seawater is relatively low in temperature because it is far away from the influence of the solar radiation. Based on the temperature difference, the power generation module 101 can generate power through the thermodynamic cycle of the corresponding working medium. Exemplarily, the power generation module 101 can generate power based on an open cycle system, a closed cycle system, or a hybrid cycle system. It should be understood that during the off-peak period, the power generation module 101 will generate part of the excess power in addition to the required power supply for the user, and this part of the excess power can be used to drive the compression and expansion module 105 to do 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 circulating working medium circulating in the pipeline. It can be understood that the compression and expansion module 105 can compress the gas to a smaller volume through work, and at the same time increase the internal energy of the heat exchange circulating working medium gas molecules in the compression and expansion module 105, so as to increase the temperature of the heat exchange circulating working medium. On the other hand, when the heat exchange circulating working medium expands through the compression and expansion module 105, it does work to the outside, so as to reduce the internal energy of the heat exchange circulating working medium, and thus reduce the temperature of the heat exchange circulating working medium. Through the compression and / or expansion operation of the heat exchange circulating working medium by the compression and expansion module 105, the temperature of the heat exchange circulating working medium in the pipeline can be adjusted. Exemplarily, during the off-peak period, the excess power generated by the power generation module 101 can drive the compression and expansion module 105 to compress and heat and / or expand and cool the heat exchange circulating working medium, so as to convert the excess power into internal energy (cold energy / heat energy) in the heat exchange circulating working medium, so as to further store the excess power through the cold storage / release module 109 and the heat storage / release module 107; during the peak period, 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 circulating working medium through heat exchange, and the heat exchange circulating working medium can do work to the outside when it expands, so as to drive the engine to generate power.

[0067] The heat exchange module 103 is 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 based on different heat exchange working fluids in different modules. For example, the cold storage / release module 109 can include a cold storage working fluid that exchanges heat with the heat exchange cycle working fluid, which can 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 can include a heat storage working fluid that exchanges heat with the heat exchange cycle working fluid, which can 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 can include a power generation cycle working fluid for seawater temperature difference power generation, which can also be used to exchange heat with the heat exchange cycle working fluid to warm up or cool down the power generation cycle working fluid through the heat exchange process.

[0068] Specifically, the power generation module 101 utilizes the temperature difference between the warm shallow seawater and the deep cold seawater to generate power. During the peak electricity consumption period, the power generation module 101 can generate excess power, which can be used to drive the compression expansion module 105 to compress and / or expand the heat exchange cycle working fluid in the pipeline, so that the excess power generation of the power generation module 101 is converted into internal energy (cold energy / heat energy) in the heat exchange cycle working fluid through the work of the compression expansion module 105; then the internal energy in the heat exchange cycle working fluid is transferred to the cold storage / release module 109 through the heat exchange between 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 through the heat exchange between the heat exchange cycle working fluid and the heat storage working fluid, so as to store 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 the peak electricity consumption period, the cold storage / release module 109 can transfer the cold energy in the cold storage / release module 109 to the heat exchange cycle working fluid through the heat exchange between the heat exchange cycle 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 cycle working fluid through the heat exchange between the heat exchange cycle working fluid and the heat storage working fluid, so as to adjust the temperature of the heat exchange cycle working fluid, so that the heat exchange cycle working fluid can be compressed and expanded based on the released cold energy and / or heat energy, so as to finally drive the engine to generate power.

[0070] Further, during the peak electricity consumption period, the heat exchange cycle working fluid can also be used to warm up the power generation cycle working fluid 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] For more clearly illustrating the beneficial technical of the present application, the energy island system of the present application is applied to the system as shown in Figure 2 for example, some specific embodiments of the present application are exemplarily illustrated. Figure 3 Figure 4 are structure schematic diagrams of the heat exchange units in two different drawing directions, it is understood that, Figure 3 Figure 4 the naming of the heat exchange unit structure in the foregoing is only an exemplary way for improving 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 can comprise a heat exchanger.

[0072] In one embodiment, as shown in Figure 2 the heat exchange module comprises 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 respectively; 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 gas charging adjusting valve 14 is further arranged on the connecting pipeline of 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 a 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 respectively;

[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 pipelines respectively; 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 pipelines respectively; one end of the second heat exchange pipeline of the third heat exchange unit 53 is provided with a second adjusting 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 adjusting valve 39 is further arranged on the connecting pipeline of the other end of the first heat exchange pipeline of the second heat exchange unit 40.

[0078] ​​The first heat exchange pipeline in the heat exchange unit is in heat exchange connection with the second heat exchange pipeline to perform heat exchange between heat exchange working medium in the two pipelines.

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

[0080] Further, the other end of the circulating gas source further comprises an air charging valve 18 for charging air to the circulating gas source from the outside in the case that the circulating gas source is short of air.

[0081] In one embodiment, referring to Figure 2 The cold storage module comprises a medium-temperature cold storage unit 28 and a low-temperature cold storage unit 20, and the heat storage module comprises 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 a pipeline, respectively.

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

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

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

[0087] In one of the embodiments, referring to Figure 2 , the cold storage / release module further comprises a cold energy heat exchange unit 19; the heat storage / release module further comprises 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 cold storage unit;

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

[0090] The heat exchange working medium in the first heat exchange pipeline of the cold energy heat exchange unit 19 is the cold storage working medium, and the heat exchange working medium in the second heat exchange pipeline of the cold energy heat exchange unit 19 is the external heat exchange working 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 working medium in the first heat exchange pipeline of the heat energy heat exchange unit 1 is the external heat exchange working medium, and the heat exchange working medium in the second heat exchange pipeline of the heat energy heat exchange unit 1 is the heat storage working medium. The heat energy 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 of the embodiments, referring to Figure 2 , the compression expansion module further comprises 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; a first one-way valve 82 is arranged 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 first heat exchange pipeline of the fourth heat exchange unit 56 through pipelines; 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 arranged on the pipeline connected to the other end of the second expansion unit 11, so that the heat exchange circulating medium flows out from the other end of the second expansion unit 11;

[0097] The driving unit 61 is electrically connected to the power generation 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 circulating medium by using the excess power generation of the power generation module;

[0098] The first compression unit 60 is connected to the first expansion unit 90 through a shaft coupling, and the second expansion unit 11 is connected to the second compression unit 9 through a shaft coupling; the power generation unit 12 is connected to the second expansion unit 11 to generate electricity by using the work of the second expansion unit 11.

[0099] Specifically, the first compression unit 60 and the second compression unit 9 can be used to compress and heat the heat exchange circulating medium, and the heat exchange circulating medium can do work and be cooled in the first expansion unit 90 and 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 circulating medium, and the heat exchange circulating medium can do work and be cooled in the first expansion unit 90 and the second expansion unit 11.

[0101] In one embodiment, please refer to Figure 2 The power generation module includes a condensation heat exchange unit 41, an evaporation 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 circulating branch, a second power generation circulating 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 condensation 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 evaporation heat exchange unit 44 through a pipeline;

[0103] One end of the first heat exchange pipeline of the condensation heat exchange unit 41 is connected to one end of the second heat exchange pipeline of the evaporation heat exchange unit 44 through a pipeline via a first power generation cycle branch; the other end of the second heat exchange pipeline of the evaporation heat exchange unit 44 is connected to one end of the turbine 30 via a pipeline, and the other end of the turbine 30 is connected to the other end of the first heat exchange pipeline of the condensation heat exchange unit 41 via a second power generation cycle branch; the first power generation cycle branch is provided with a circulating working medium 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 condensation 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 condensation 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 evaporation 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 evaporation 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 working medium in the first heat exchange pipeline of the condensation heat exchange unit 41 is a power generation cycle working medium, the heat exchange working medium in the second heat exchange pipeline of the condensation heat exchange unit 41 is deep cold seawater used for condensation. The heat exchange working medium in the first heat exchange pipeline of the evaporation heat exchange unit 44 is shallow layer seawater used for temperature rise, and the heat exchange working medium in the second heat exchange pipeline of the evaporation heat exchange unit 44 is a power generation cycle working medium. The cold water pump 35 is connected to external seawater and can be used to pump deep cold seawater into the condensation heat exchange unit 41; the warm water pump 49 is connected to external seawater and can be used to pump shallow layer seawater with a higher temperature than the deep cold seawater into the evaporation heat exchange unit 44.

[0107] Specifically, in the case of power generation of the power generation module, the process of generating power by using seawater temperature difference can include the following steps: the cold water pump 35 extracts deep cold seawater (temperature about 4-7℃), the deep cold seawater enters the condensation heat exchange unit 41 and exchanges heat with the power generation cycle working medium, and then the power generation cycle working medium in the condensation heat exchange unit 41 is condensed from gas to liquid; the power generation cycle working medium enters the evaporation heat exchange unit 44 after being pressurized by the circulating working medium pump 45; the warm water pump 49 extracts shallow layer seawater (temperature about 25-30℃), exchanges heat with the power generation cycle working medium in the evaporation heat exchange unit 44, and then the power generation cycle working medium in the evaporation heat exchange unit 44 is evaporated into gas; then the power generation cycle working medium enters the turbine 30 to do work, thereby driving the generator 29 to operate to generate power. It can be understood that the power generation cycle working medium can include propane, ammonia and other heat exchange working media, which are not limited in the present application.

[0108] Further, in one of the embodiments, taking the storage working medium as hexane, the heat storage working medium as molten salt, and the circulating air source 17 as a circulating air supplement tank as an example, as shown in FIG. 4, the power generation cycle branch is connected to the storage and heat exchange unit 50 via the pipeline, and the pipeline is connected to the turbine 30 via the pipeline. Figure 5As shown, sensors (instruments) for measuring the physical parameters of each heat exchange medium can also be provided on the connecting pipelines of the energy island system. It should be understood that, Figure 5 In some embodiments, the instruments marked as "T" are temperature sensors, which can be used to measure the temperature of the heat exchange medium at the position of the sensor; the instruments marked as "P" are pressure sensors, which can be used to measure the pressure of the heat exchange medium at the position of the sensor; and the instruments marked as "F" are flow sensors, which can be used to measure the flow of the heat exchange medium at the position of the sensor. It should be understood that, in order to improve the observability of the image and facilitate the understanding of those skilled in the art, the various sensors provided in Figure 5 In some embodiments, the instruments marked as "T" are temperature sensors, which can be used to measure the temperature of the heat exchange medium at the position of the sensor; the instruments marked as "P" are pressure sensors, which can be used to measure the pressure of the heat exchange medium at the position of the sensor; and the instruments marked as "F" are flow sensors, which can be used to measure the flow of the heat exchange medium at the position of the sensor. It should be understood that, in order to improve the observability of the image and facilitate the understanding of those skilled in the art, the various sensors provided in Figure 5 In some embodiments, the instruments marked as "T" are temperature sensors, which can be used to measure the temperature of the heat exchange medium at the position of the sensor; the instruments marked as "P" are pressure sensors, which can be used to measure the pressure of the heat exchange medium at the position of the sensor; and the instruments marked as "F" are flow sensors, which can be used to measure the flow of the heat exchange medium at the position of the sensor. It should be understood that, in order to improve the observability of the image and facilitate the understanding of those skilled in the art, the various sensors provided in

[0109] In one embodiment, as shown in Figure 6 The present application also provides an energy island control method, which is applied to the energy island system described in any of the above embodiments. The method comprises the following steps:

[0110] If it is in a low electricity consumption period, the following steps are performed:

[0111] Step S601: cutting off the pipeline connection 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: using the excess power generation of the power generation module to drive the compression and expansion module to perform compression and expansion operation on the heat exchange circulating medium.

[0113] Step S605: if the heat exchange circulating medium 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 be enabled, so as to store the excess power generation in the form of heat energy and / or cold energy.

[0114] For example, the energy island control method described above is applied to the energy island system as shown in Figure 2 As shown in Figure 2 The pipeline of the energy island system also includes corresponding valves, and it should be understood that, Figure 2 In some embodiments, the valves are only an exemplary setting mode, and the valve position setting of the present application is not limited to Figure 2 The valve setting mode of the energy island system can also adopt other forms of valve position setting mode, 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, in the off-peak period, the system will store the excess power generated by the power generation module to the storage / release cold module and the storage / release hot module, and an exemplary operating 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 connection between the heat exchange module and the power generation module, the heat exchange module and the storage / release cold module, the heat exchange module and the storage / release hot module, the heat exchange module and the second compression unit of the compression expansion module, and the heat exchange module and the second expansion unit of the compression expansion module;

[0117] ② Open Figure 2 The remaining valves of the system are shown, and the air (heat exchange circulating working 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 to work.

[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 turn to form a heat exchange cycle of the circulating air. During the circulation process, the circulating air flow rate input from the other end of the first heat exchange pipeline of the first heat exchange unit is monitored by the flow sensor, and the opening degree of the air charging adjusting valve 14 is adjusted to stabilize the air flow rate at the design value.

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

[0120] ③ During the air circulation process, the first temperature of the circulating air input from the other end of the first heat exchange pipeline of the first heat exchange unit 25 is monitored by the temperature sensor, and when the first temperature decreases to 4℃, the valve 27 is opened, and the cold storage medium in the medium-temperature cold storage unit is input into one end of the second heat exchange pipeline of the first heat exchange unit 25 to absorb the cold energy (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, and when the temperature sensor monitors 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 decreases to -70℃, the valve 26 is closed and the valve 13 is opened, so that the cold storage medium after cooling enters the low-temperature cold storage unit 20 for storage.

[0122] ④When the temperature sensor monitors that the circulating air temperature output from one end of the first heat exchange pipeline of the first heat exchanger is lower than 8℃, 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 sensor is used to monitor the flow rate of the deep cold seawater entering the other end of the first heat exchange pipeline of the second heat exchange unit 40, and the opening degree of the first regulating valve 39 is controlled. The flow sensor is used to monitor the flow rate of the deep cold seawater entering the other end of the second heat exchange pipeline of the condensation heat exchange unit 41, and the flow rate is adjusted by controlling the frequency of the cold water pump 35.

[0124] Specifically, during the low electricity consumption period, the control method of the power generation module and the heat exchange module further comprises:

[0125] According to the temperature and pressure of the power generation circulating medium flowing out of the other end of the turbine 30, the enthalpy H1 of the power generation circulating medium flowing out of the other end of the turbine 30 is calculated,

[0126] According to the temperature and pressure of the power generation circulating medium flowing out of one end of the first heat exchange pipeline of the second heat exchange unit, the enthalpy H2 of the power generation circulating medium flowing out of the confluence of one end of the first heat exchange pipeline of the condensation heat exchange unit 41 and one end of the first heat exchange pipeline of the second heat exchange unit 40 is calculated.

[0127] 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 into the condensation heat exchange unit, and the input flow rate of the power generation circulating medium flowing in from the other end of the first heat exchange pipeline of the second heat exchange unit 40 is adjusted by controlling the opening degree of the first regulating valve 39, so as to control the temperature T of the heat exchange circulating medium flowing out of one end of the second heat exchange pipeline of the second heat exchange unit according to the following formula: 72 and the second enthalpy H2 is kept at a set value:

[0128] (T 74 -T 72 )F 23 C Pair =F 38 (H1-H2)

[0129] (T 79 -T 78 )F 36 C Pwater =(F 32 -F 38 )(H1-H2)

[0130] Wherein, T 72 is the temperature of the heat exchange circulating medium flowing out of one end of the second heat exchange pipeline of the second heat exchange unit, and T 74temperature of the heat exchange cycle medium flowing into the other end of the first heat exchange pipeline of the fourth heat exchange unit, T 23 temperature of the heat exchange cycle medium flowing into the other end of the first heat exchange pipeline of the fourth heat exchange unit, T Pair specific heat capacity of the heat exchange cycle medium, F 38 flow rate of the power generation cycle medium flowing into the other end of the first heat exchange pipeline of the second heat exchange unit, T 79 temperature of the deep cold seawater flowing out of the one end of the second heat exchange pipeline of the condensation heat exchange unit, T 78 temperature of the deep cold seawater flowing into the other end of the second heat exchange pipeline of the condensation heat exchange unit, F 36 flow rate of the deep cold seawater flowing into the other end of the second heat exchange pipeline of the condensation heat exchange unit, C Pwater specific heat capacity of the deep cold seawater, F 32 flow rate of the power generation cycle medium on the second power generation cycle branch, H1 is a first enthalpy value, and H2 is a second enthalpy value.

[0131] V. When the temperature of the heat exchange cycle medium flowing into the one end of the second heat exchange pipeline of the fifth heat exchange unit 6 is higher than 280℃, the valves 7 and 5 are opened, so that the heat storage medium in the medium temperature heat storage unit enters the fifth heat exchange unit 6 to exchange heat with the circulating air, and circulates between the medium temperature heat storage unit 8 and the fifth heat exchange unit 6; when the temperature of the heat storage medium at the one end of the first heat exchange pipeline of the fifth heat exchange unit 6 is higher than 560℃, the valve 5 is closed, and the valve 3 is opened, so that the heat storage medium flows from the medium temperature heat storage unit 8 into the high temperature heat storage unit 2 through the fifth heat exchange unit 6.

[0132] VI. When the temperature of the heat exchange cycle medium flowing out of the other end of the first heat exchange pipeline of the fourth heat exchange unit is higher than 21℃, the valve 69 is closed, the valves 55, 75 and 52 are opened, and the circulating air enters the third heat exchange unit 53 to exchange heat, so as to heat the circulating medium of the power generation subsystem; the opening degree of the second regulating valve 52 and the operating frequency of the variable frequency water pump 49 are controlled, so as to maintain the enthalpy value and the air temperature T71 of the power generation cycle medium input into the one end of the turbine 30 to be set values.

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

[0134] According to the temperature and pressure of the power generation cycle medium input into the one end of the turbine 30, a third enthalpy value H3 of the power generation cycle medium input into the one end of the turbine 30 is calculated;

[0135] According to the temperature and pressure of the power generation cycle medium flowing out of the one end of the circulating medium pump 45, a fourth enthalpy value H4 of the power generation cycle medium flowing into the third heat exchange unit 53 and the evaporation heat exchange unit 44 is calculated;

[0136] The operation frequency of the warm water pump 49 is adjusted to control the input flow rate of the shallow seawater into the evaporative heat exchange unit, and the temperature T of the heat exchange cycle medium at the other end of the first heat exchange line of the third heat exchange unit is controlled by adjusting the opening degree of the second regulating valve 52 to control the input flow rate of the heat exchange cycle medium from the one end of the second heat exchange line of the third heat exchange unit, according to the following formula 71 and the third enthalpy H3 is kept at a set value:

[0137] (T 68 -T 71 )F 23 C Pair = F 51 (H3-H4)

[0138] (T 80 -T 81 )F 50 C Pwater = (F 31 -F 51 )(H3-H4)

[0139] wherein T 68 is the temperature of the heat exchange cycle medium at the one end of the first heat exchange line of the third heat exchange unit, T 71 is the temperature of the heat exchange cycle medium at the other end of the first heat exchange line of the third heat exchange unit, F 23 is the flow rate of the heat exchange cycle medium at the other end of the first heat exchange line of the first heat exchange unit, F 51 is the flow rate of the heat exchange cycle medium at the one end of the second heat exchange line of the third heat exchange unit, T 80 is the temperature of the shallow seawater input at the one end of the first heat exchange line of the evaporative heat exchange unit, T 81 is the temperature of the shallow seawater output at the other end of the first heat exchange line of the evaporative heat exchange unit, F 50 is the flow rate of the shallow seawater input at the one end of the first heat exchange line of the evaporative heat exchange unit, F 31 is the flow rate of the heat exchange cycle medium input at the one end of the turbine 30, F 51 is the flow rate of the heat exchange cycle medium at the one end of the second heat exchange line of the third heat exchange unit, C Pair is the specific heat capacity of the cycle air (heat exchange cycle medium), C Pwater is the specific heat capacity of the shallow seawater.

[0140] Exemplarily, in one of the embodiments, 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 to the fifth heat exchange unit 6, transfers heat to the heat storage medium, and then to the fourth heat exchange unit 56 for heat exchange to further reduce the temperature; the circulating air enters the third heat exchange unit 53 to transfer heat to the power generation circulating medium; then enters the first expansion unit 77 to do work to further reduce the temperature (the temperature is reduced to -70°C) and the pressure; the circulating air is input to the first heat exchange unit 25 to transfer 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 enters the fourth heat exchange unit 56 for heat exchange to increase the temperature; then enters the first compression unit 60 again, and completes a cycle. It can be understood that the power generation module, the compression and expansion module, the heat exchange module, the cold storage and release module, and the heat storage and release module are electrically and thermally coupled with each other, and can realize the cascade utilization of energy of different grades, thereby saving the electricity consumption of the water pump, and converting the excess power generation into heat energy stored in the heat storage and release module, or converting the excess power generation into cold energy stored in the cold storage and release module.

[0141] Further, in one of the embodiments, the energy island control method further comprises:

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

[0143] The valve 22 is closed, and the valves 14 and 16 are opened to deliver air back to the circulating air source;

[0144] When it is monitored that the pressure in the circulating air source reaches a preset pressure value, the valve 16 is closed, and the charging of the circulating air source is stopped; wherein the preset pressure value can include 1-2 MPa;

[0145] The electrical connection between the driving unit (motor) 61 and the power generation module is closed, and the power supply of the power generation module to the compression and expansion module is stopped;

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

[0147] The valves 3, 7, 27, and 13 are closed to cut off the pipeline connection between the heat exchange module and the cold storage and release module, and the pipeline connection between the heat exchange module and the heat storage and release module;

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

[0149] In one of the embodiments, as shown in Figure 7 the method further comprises:

[0150] If it is in the preset power consumption peak period, the following steps are performed:

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

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

[0153] Step S705, the work of the compression expansion module and the temperature difference power generation of the power generation module are connected in parallel output.

[0154] Further, in one of the embodiments, the method further comprises: heating the power generation cycle working medium in the power generation module by heat exchange between the heat exchange cycle working medium and the power generation cycle working medium of the power generation module to promote the seawater temperature difference power generation process of the power generation module.

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

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

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

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

[0159] ④ Open valves 14, 16, and the circulating gas source starts to charge the heat exchange system and the compression expansion system. Specifically, the flow sensor monitors the flow rate of the heat exchange cycle working medium output by the circulating gas source, and the circulating flow rate is controlled by the charging regulating valve 14. Exemplarily, when the pressure in the circulating gas source drops to 0.1 MPa, close valves 16, 14 to stop charging.

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

[0161] Then, 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 inputted at the one end of the turbine 30 are kept constant by controlling the opening of the second regulating valve 52 and the operating frequency of the variable frequency warm water pump 49.

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

[0163] According to the pressure and temperature of the power generation circulating medium inputted at the one end of the turbine 30, the fifth enthalpy value H5 of the power generation circulating medium inputted at the one end of the turbine 30 is calculated;

[0164] According to the temperature and pressure of the power generation circulating medium flowed out at the one end of the circulating working medium pump 45, the sixth enthalpy value H6 of the power generation circulating medium flowed into the third heat exchange unit 53 and the evaporation heat exchange unit 44 is calculated;

[0165] According to the following formula, the flow of the shallow seawater inputted into the evaporation heat exchange unit is adjusted by adjusting the operating frequency of the variable frequency warm water pump 80, and the flow of the power generation circulating medium flowed into the 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, so as to control the temperature T 85 and the fifth enthalpy value H5 to keep at the set value:

[0166] (T 84 -T 85 )F 23 C Pair =F 51 (H5-H6)

[0167] (T 80 -T 81 )F 50 C Pwater =(F 31 -F 51 )(H5-H6)

[0168] Wherein, T 84 is the temperature of the heat exchange circulating medium at the one end of the first heat exchange pipeline of the third heat exchange unit, T 85 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, F 23 is the flow of the heat exchange circulating medium at the other end of the first heat exchange pipeline of the first heat exchange unit, F 51 is the flow of the power generation circulating medium at the one end of the second heat exchange pipeline of the third heat exchange unit, T 80 is the temperature of the shallow seawater flowed into the one end of the first heat exchange pipeline of the condensation heat exchange unit, T 81temperature of the shallow seawater flowing out of the other end of the first heat exchange pipeline of the condensing heat exchange unit, F 50 flow rate of the shallow seawater flowing into one end of the first heat exchange pipeline of the condensing heat exchange unit, F 31 flow rate of the power generation circulating medium flowing into one end of the turbine 30, C Pair specific heat capacity of the circulating air (heat exchange circulating medium), C Pwater specific heat capacity of the shallow seawater, H5 is a fifth enthalpy value, and H6 is a sixth enthalpy value.

[0169] Exemplarily, in one of the embodiments, during the power consumption peak period, taking the circulating air as the heat exchange circulating medium, the circulating air is heated to 560°C by the heat storage medium in 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 power, and the temperature and pressure of the circulating air are reduced; 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 to transfer heat to the power generation circulating medium; the circulating air enters the first heat exchange unit 25 again to exchange 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 are increased; then the circulating air enters the fourth heat exchange unit 56 again to exchange heat, and the temperature of the circulating air is further increased; then the circulating air absorbs heat from the heat storage medium in the fifth heat exchange unit 6 again, thereby completing one cycle. It can be understood that the power generation module, the compression and expansion module, the heat exchange module, the cold storage and release module, and the heat storage and release module are electrically and thermally coupled with each other, the cold energy and the heat energy stored in the cold storage and release module and the heat storage and release module can be released to be converted into electric energy, and the electric energy can be connected in parallel with the electric energy generated by the seawater temperature difference of the power generation module and then sent out.

[0170] Further, in one of the embodiments, the energy island control method further comprises:

[0171] When the system stops releasing energy, the following steps are performed:

[0172] The valve 67 is closed, and the valves 14 and 16 are opened to deliver the circulating air (heat exchange circulating medium) back to the circulating air supplement tank (circulating air source);

[0173] When it is monitored that the pressure in the circulating air supplement tank reaches a preset pressure value, the valve 16 is cut off to stop the charging of the circulating air supplement tank; the preset pressure value can include 1-2 MPa;

[0174] The connection between the power generation unit 12 and the output circuit is cut off to stop the output of power generation to the outside world;

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

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

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

[0178] Further, 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 cold energy can be outputted in series through 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 and multiple different levels of heat exchange units, wherein each level of heat exchange unit can control the temperature range of the output cold energy or heat energy by selecting different types of heat exchangers to perform multi-level heat exchange cascade utilization of the cold energy or heat energy.

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

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

[0181] Illustratively, it can be understood that the cold energy heat exchange unit of the cold storage / release module can realize the output of cold energy of different grades through the heat exchange of different cold media (such as water, ice slurry, organic solvent, cold storage material, etc.); the heat energy heat exchange unit of the heat storage / release module can realize the output of heat energy of different grades through the heat exchange of different heat media (such as water, steam, heat storage material, etc.).

[0182] It should be understood that although each step in the flowchart involved in each of the above embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps involved in each of the above embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0183] In one embodiment, a computer device is also provided, including a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the steps in each of the above method embodiments.

[0184] In one embodiment, the present application also provides a computer readable storage medium, having stored thereon a computer program, which when executed by a processor, implements the steps of the method according to any one of the above embodiments.

[0185] It is understood by those skilled in the art that all or part of the processes of the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium and can include the processes of the above-mentioned embodiments when executed. In the embodiments provided by the present application, any reference to memory, database or other medium 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), magnetoresistive 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 but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided by the present application can be a general processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0186] In the description of the specification, the description of the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0187] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0188] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which belongs to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended 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 by utilizing the temperature difference of seawater; The compression-expansion module is electrically connected to the power generation module and is connected to the heat exchange module via a pipeline, and is used to compress and / or expand a heat exchange cycle medium; wherein the heat exchange cycle medium is used to circulate in the pipelines between 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 off-peak hours and release the cold energy during peak hours; the heat storage / release module is used to store excess power generation in the form of heat energy during off-peak hours and release the heat energy during peak hours; 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; The compression-expansion module 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; Among them, the working medium of the heat exchange cycle is circulating air; During the off-peak period of electricity consumption, the driving unit drives the first compression unit and the first expansion unit to rotate, and the heat exchange cycle working fluid enters the first compression unit to increase the temperature and pressure; then the heat exchange cycle working fluid is input into the fifth heat exchange unit to transfer the heat to the heat storage medium, and then enters the fourth heat exchange unit for heat exchange to further reduce the temperature; the heat exchange cycle working fluid then enters the third heat exchange unit to transfer the heat to the power generation cycle working fluid; then enters the first expansion unit to perform work to further reduce the temperature and pressure; the heat exchange cycle working fluid then enters the first heat exchange unit to transfer the cold energy to the cold storage medium, and then enters the second heat exchange unit to cool the power generation cycle working fluid; the heat exchange cycle working fluid then enters the fourth heat exchange unit for heat exchange to increase the temperature; and then enters the first compression unit to complete a cycle; During peak electricity consumption, the heat exchange cycle working fluid is heated to 560°C by the heat storage medium after passing through the fifth heat exchange unit; then the heat exchange cycle working fluid enters the second expansion unit to expand and perform work to drive the power generation unit to generate electricity, and the temperature and pressure of the heat exchange cycle working fluid decrease; then, the heat exchange cycle working fluid enters the fourth heat exchange unit to cool down; then, the heat exchange cycle working fluid enters the third heat exchange unit to transfer heat to the power generation cycle working fluid; the heat exchange cycle working fluid enters the first heat exchange unit again to exchange heat with the cold storage medium, and the temperature of the heat exchange cycle working fluid is further reduced to -50°C; then, the heat exchange cycle working fluid enters the first compression unit again, and the temperature and pressure of the heat exchange cycle working fluid increase; then, the heat exchange cycle working fluid enters the fourth heat exchange unit for heat exchange, and the temperature of the heat exchange cycle working fluid further increases; then, the heat exchange cycle working fluid enters the fifth heat exchange unit to absorb heat from the heat storage medium, thereby completing a cycle.

2. An energy island control method, characterized in that: Applicable to the energy island system as claimed in claim 1.

3. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to claim 2 is implemented.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to claim 2 is implemented.

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