CN219015078U

CN219015078U - Evaporation condensing device and gas-liquid phase-change carbon dioxide energy storage system

Info

Publication number: CN219015078U
Application number: CN202223303902.1U
Authority: CN
Inventors: 汪晓勇; 陈强; 高莎
Original assignee: Baihe New Energy Technology Shenzhen Co ltd
Current assignee: Baihe New Energy Technology Shenzhen Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-05-12
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to an evaporation condensing device and a gas-liquid phase-change carbon dioxide energy storage system. The evaporation condensing device comprises: the condenser comprises a condensing pipe and a condensing shell, wherein the condensing pipe is arranged in the condensing shell, and the condensing shell is provided with a gas phase inlet and a gas phase outlet; the evaporator comprises an evaporation tube and an evaporation shell, the evaporation tube is arranged in the evaporation shell, and the evaporation shell is communicated with the condensation shell; the condenser and the evaporator are integrated; gaseous carbon dioxide enters the condensation shell through the gas phase inlet, is condensed into liquid carbon dioxide when passing through the condensation pipe of the flowing condensation medium, is stored in the evaporation shell, and is vaporized and gasified into gaseous carbon dioxide when flowing through the evaporation medium in the evaporation pipe, and the gaseous carbon dioxide enters the evaporation shell and flows out through the gas phase outlet. The energy loss of the carbon dioxide in the gas-liquid phase change cyclic utilization process is reduced, the process flow of the carbon dioxide energy storage technology is optimized, and the efficiency and the energy utilization rate of the energy storage system are improved.

Description

Evaporation condensing device and gas-liquid phase-change carbon dioxide energy storage system

Technical Field

The utility model relates to the technical field of energy storage equipment, in particular to an evaporation condensing device and a gas-liquid phase-change carbon dioxide energy storage system.

Background

Under the dual pressures of environmental pollution and fossil energy shortage, new energy is attracting attention. The new energy source represented by wind power and photovoltaic has the characteristics of low energy density, unbalanced space-time distribution, instability and the like, is greatly influenced by natural environment, and has volatility and intermittence.

In order to fully utilize renewable energy sources, an energy storage technology is required to be provided to solve the problems of safe operation of a power grid, electric power and electric quantity balance and renewable energy source consumption. The gas-liquid phase change carbon dioxide energy storage system can be used for supporting peak clipping, valley filling, frequency modulation and phase modulation of a power grid, can also be used for providing a standby power supply for the power grid, supporting black start of other units and the like. The advantages of simple structure, flexible arrangement, higher energy storage efficiency and the like are brought into wide attention gradually.

The gas-liquid phase carbon dioxide energy storage is a gas-liquid phase conversion and two-state cooperative energy storage technology, has high system efficiency, no explosion risk, good environmental protection performance, wide power, capacity and regional adaptability, can cover a large range of energy storage power and capacity requirements, flexibly and conveniently adjusts the storage capacity and the energy release capacity by controlling the operation time of the energy storage process and the energy release process, can be used in a global area (from a tropical zone to a cold zone), and is a physical energy storage technology with great development prospect.

The basic principle of the gas-liquid phase-change carbon dioxide energy storage system is that in the electricity consumption low-valley period, the motor is driven by surplus or redundant electric energy to compress the carbon dioxide gas at normal temperature and normal pressure into liquid. In the electricity peak period, the liquid carbon dioxide is heated to be in a gaseous state, and an expander is driven to generate electricity. The carbon dioxide is converted in the gas-liquid two phases and recycled.

However, in the existing carbon dioxide energy storage technology, gas-liquid phase change circulation is realized by utilizing a plurality of heat exchange devices and pipelines, so that the flow resistance of a circulating working medium is increased, the system efficiency and the energy utilization rate are influenced, the system cost is increased, and the large-scale application of the gas-liquid phase change carbon dioxide energy storage system is not facilitated.

Disclosure of Invention

Based on the problems, such as the influence on the system efficiency and the energy utilization rate caused by the increase of the flow resistance of a circulating working medium in the current gas-liquid phase-change carbon dioxide energy storage technology, the evaporation condensing device and the gas-liquid phase-change carbon dioxide energy storage system which can reduce the flow resistance of carbon dioxide, improve the energy storage efficiency and the energy utilization rate and reduce the cost are provided.

An evaporative condensing device for effecting condensation and evaporation of carbon dioxide, the evaporative condensing device comprising:

the condenser comprises a condensing pipe and a condensing shell, wherein the condensing pipe is arranged in the condensing shell, the condensing shell is provided with a gas phase inlet and a gas phase outlet, and the condensing pipe is used for flowing condensing medium; and

The evaporator comprises an evaporation pipe and an evaporation shell, wherein the evaporation pipe is arranged in the evaporation shell, the evaporation shell is communicated with the condensation shell, and the evaporation pipe is used for enabling an evaporation medium to flow;

the condenser is integrated with the evaporator; gaseous carbon dioxide enters the condensation shell through the gas phase inlet, is condensed into liquid carbon dioxide when passing through the condensation pipe of the flowing condensation medium, and is stored in the evaporation shell, and the liquid carbon dioxide is evaporated and gasified into gaseous carbon dioxide when flowing through the evaporation medium in the evaporation pipe, and the gaseous carbon dioxide enters the condensation shell and flows out through the gas phase outlet.

In one embodiment, the condenser is disposed above the evaporator.

In one embodiment, the condensing shell is independent of the evaporating shell and is arranged in a stacked manner;

the evaporation condensing device further comprises a communicating pipe, and the communicating pipe is communicated with the condensing shell and the evaporation shell.

In one embodiment, the condensing shell and the evaporating shell are integrally formed to form a mounting shell;

the condensing tube and the evaporating tube are positioned in the installation shell, and the condensing tube is positioned above the evaporating tube.

In one embodiment, the condensation shell and the evaporation shell are integrated to form a mounting shell, the condensation tube and the evaporation tube are integrated to form a heat exchange tube, and the heat exchange tube is arranged in the mounting shell;

when the evaporation and condensation device condenses, a condensing medium flows through the heat exchange tube, and when the evaporation and condensation device evaporates, an evaporating medium flows through the heat exchange tube.

In one embodiment, the evaporation and condensation device further comprises a storage tank, wherein a liquid phase pipe is arranged on the evaporator, and the storage tank is communicated with the evaporator through the liquid phase pipe.

In one embodiment, the evaporative condensing device further comprises a gas-liquid separation component disposed above the gas phase outlet or the evaporating pipe.

In one embodiment, the gas-liquid separation component is a gas-liquid two-phase separator, and the gas-liquid two-phase separator is arranged at the gas phase outlet; or,

the gas-liquid separation component is a silk screen separation component, and the silk screen separation component is arranged above the evaporation pipe; or,

the gas-liquid separation component is a baffle separation component, and the baffle separation component is arranged above the evaporation pipe; the baffle separating component comprises at least one porous partition plate, when the number of the partition plates is multiple, the partition plates are arranged at intervals, and through holes on adjacent partition plates are arranged in a staggered mode, and/or the diameter sizes of the through holes on adjacent partition plates are different.

The gas-liquid phase-change carbon dioxide energy storage system comprises a gas storage, an energy storage device, an expansion device and the evaporation and condensation device according to any technical characteristics, wherein the evaporation and condensation device is connected with one end of the energy storage device and one end of the expansion device, and the gas storage is connected with the other end of the energy storage device and the other end of the expansion device.

In an embodiment, the gas-liquid phase-to-liquid phase carbon dioxide energy storage system includes a plurality of the evaporation-condensation devices, and the plurality of evaporation-condensation devices are arranged in parallel between the energy storage device and the expansion device.

After the technical scheme is adopted, the utility model has at least the following technical effects:

the utility model relates to an evaporation condensing device and a gas-liquid phase-change carbon dioxide energy storage system, wherein the evaporation condensing device comprises a condenser and an evaporator, the condenser comprises a condenser pipe and a condensing shell, the evaporator comprises an evaporation pipe and an evaporating shell, a condensing medium flows in the condenser pipe, gaseous carbon dioxide flows in the condensing shell, the evaporating medium flows in the evaporation pipe, and liquid carbon dioxide can be stored and flows in the evaporating shell.

When the evaporation and condensation device condenses gaseous carbon dioxide, the gaseous carbon dioxide enters the condensation shell from the gas phase inlet of the condensation shell, meanwhile, a condensation medium flows in the condensation pipe, and the condensation medium absorbs heat of the gaseous carbon dioxide in the condensation shell to enable the heat of the gaseous carbon dioxide to be condensed into liquid carbon dioxide, flows into the evaporation shell through the condensation shell and is stored in the evaporation shell. When the evaporation condensing device evaporates the liquid carbon dioxide, the evaporation medium flows in the evaporation pipe, and the evaporation medium heats the liquid carbon dioxide, so that the liquid carbon dioxide is evaporated and gasified into gaseous carbon dioxide, enters the condensing shell along the evaporation shell, and then flows out of the condensing shell through the gas phase outlet.

According to the evaporation condensing device, the condenser and the evaporator are integrated, the conversion, storage and utilization of the carbon dioxide gas-liquid two phases are realized through the integration of the condenser and the evaporator, and compared with the mode that the condenser and the evaporator of the existing carbon dioxide gas-liquid phase-change energy storage technology are connected through a series of pipelines and liquid storage tanks/energy storage containers, the integrated arrangement of the condenser and the evaporator greatly reduces the length of the pipelines and the liquid storage tanks/energy storage containers, so that the energy loss of carbon dioxide in the gas-liquid phase-change recycling process is reduced, the number of heat exchange equipment, pipelines and related equipment is reduced, the technological process of the carbon dioxide energy storage technology is optimized, and the efficiency and the energy utilization rate of the energy storage system are improved. Meanwhile, after the condenser and the evaporator in the evaporation and condensation device are integrated, the occupied area of the equipment can be reduced, the equipment cost of the whole energy storage system is reduced, and the popularization and the use of the gas-liquid phase carbon dioxide energy storage system are facilitated.

Drawings

Fig. 1 is a schematic structural view of an evaporation and condensation device according to a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of an evaporative condensing unit according to a second embodiment of the present utility model;

FIG. 3 is a side view of the evaporative condensing unit shown in FIG. 2;

FIG. 4 is a schematic view of another embodiment of an evaporative condensing unit according to a second embodiment of the present utility model;

FIG. 5 is a schematic view of an evaporative condensing unit according to a third embodiment of the present utility model;

FIG. 6 is a schematic view of another embodiment of an evaporative condensing unit according to a third embodiment of the present utility model;

FIG. 7 is a schematic view of an embodiment of the vapor-liquid separation device of FIG. 4;

FIG. 8 is a schematic view of another embodiment of the vapor-liquid separation member provided in the vapor-condensing device shown in FIG. 4;

FIG. 9 is a schematic view of a further embodiment of the vapor-liquid separation member provided in the vapor-condensing device shown in FIG. 4;

FIG. 10 is a schematic diagram of an evaporative condensing device of the present utility model disposed in a gas-liquid phase carbon dioxide energy storage system.

Wherein: 10. a gas-liquid phase carbon dioxide energy storage system; 100. an evaporation condensing device; 110. a condenser; 111. a condensing tube; 1111. a condensing inlet; 1112. a condensation outlet; 112. a condensing housing; 1121. a gas phase inlet; 1122. a gas phase outlet; 113. a condensing cavity; 114. a communicating pipe; 120. an evaporator; 121. an evaporation tube; 1211. an evaporation inlet; 1212. an evaporation outlet; 122. an evaporation housing; 123. an evaporation cavity; 124. a liquid phase tube; 130. a mounting shell; 140. a heat exchange tube; 150. a gas-liquid separation member; 151. a screen separating member; 152. a baffle separating member; 1521. a partition plate; 300. a gas storage; 400. an energy storage device; 500. an expansion device.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 10, the present utility model provides an evaporation condensing apparatus 100. The evaporation and condensation device 100 is applied to the gas-liquid phase carbon dioxide energy storage system 10, and is used for realizing condensation and evaporation of carbon dioxide and converting surplus or redundant electric quantity of a power grid into liquid carbon dioxide pressure energy for storage. Of course, in other embodiments of the present utility model, the evaporation and condensation device 100 can be applied to other devices or apparatuses that require the evaporation and condensation function, and the evaporation and condensation device 100 can be applied to any application scenario that requires the phase change of the vapor phase material into the evaporation and condensation device 100 to be stored into the liquid phase material and the phase change of the liquid phase material out of the evaporation and condensation device 100, and the vapor phase material is not limited to carbon dioxide. The present utility model will be described with reference to the application of the evaporative condensing apparatus 100 to the gas-liquid phase carbon dioxide energy storage system 10.

At present, the carbon dioxide energy storage technology is realized by circularly utilizing a plurality of heat exchange devices and pipelines in a gas-liquid phase change mode, so that the flow resistance of a circulating working medium is increased, the system efficiency and the energy utilization rate are influenced, the system cost is increased, and the large-scale application of the gas-liquid phase change carbon dioxide energy storage system is not facilitated.

Therefore, the utility model provides a novel evaporative condensing device 100, and the evaporative condensing device 100 is applied to a gas-liquid phase-change carbon dioxide energy storage system 10, so that the number and the length of pipelines for connection can be reduced, the flow resistance of carbon dioxide in the gas-liquid phase-change cyclic utilization process can be reduced, the energy loss can be further reduced, the system efficiency and the energy utilization rate can be improved, the production cost of the whole system can be reduced, and the popularization and the application are facilitated.

Referring to fig. 1-10, the structure and principles of the evaporative condensing unit 100 in the vapor-liquid phase of carbon dioxide energy storage system 10 will be briefly described. The evaporation and condensation device 100 is connected with one end of the energy storage device 400 and one end of the expansion device 500 of the gas-liquid phase-change carbon dioxide energy storage system 10, and the other end of the energy storage device 400 and the other end of the expansion device 500 are connected with the gas storage 300. In this way, the energy storage device 400, the evaporation and condensation device 100, the expansion device 500, and the gas storage 300 form a circuit. The gas reservoir 300 stores gaseous carbon dioxide therein.

The gas-liquid phase carbon dioxide energy storage system 10 is capable of converting excess or surplus electrical power into carbon dioxide pressure energy during periods of low electricity consumption, and storing the carbon dioxide pressure energy through the conversion of carbon dioxide from a gaseous state to a liquid state. And when the power consumption peak period is reached, the stored carbon dioxide pressure energy is released, and the carbon dioxide is converted from a liquid state to a gas state, and then power generation is carried out. The carbon dioxide is converted in the gas-liquid two phases, and is recycled, so that the energy storage of the carbon dioxide pressure energy is facilitated, and the energy waste of the carbon dioxide pressure energy is reduced.

Specifically, during the electricity consumption valley period, the gas storage 300 outputs atmospheric gaseous carbon dioxide to the energy storage device 400, and the compressor in the energy storage device 400 is driven by surplus or redundant electric power to compress the gaseous carbon dioxide from low pressure to medium pressure, and the medium pressure gaseous carbon dioxide has a pressure of 2MPa-10MPa, which is illustrated as 2MPa, 5MPa, 6MPa, 7MPa, 7.2MPa, 7.5MPa, 8MPa and 10MPa, and the compressed gaseous carbon dioxide is condensed and liquefied by the evaporation and condensation device 100 to be converted into liquid carbon dioxide, and is stored in the evaporation and condensation device 100. During the peak period of electricity consumption, the evaporation and condensation device 100 evaporates and gasifies the liquid carbon dioxide, so that the liquid carbon dioxide is converted into gaseous carbon dioxide, and the gaseous carbon dioxide flows out of the evaporation and condensation device 100 and enters an expander in the expansion device 500 to generate electricity, and the generated gaseous carbon dioxide is stored in the gas storage 300.

The specific structure of the evaporative condensing apparatus 100 according to an embodiment is described below.

Referring to fig. 1 to 10, in an embodiment, the evaporative condensing device 100 includes a condenser 110 and an evaporator 120. The condenser 110 includes a condenser tube 111 and a condenser housing 112, the condenser tube 111 is disposed in the condenser housing 112, the condenser housing 112 has a gas phase inlet 1121 and a gas phase outlet 1122, and the condenser tube 111 is used for flowing a condensing medium. The evaporator 120 includes an evaporation tube 121 and an evaporation housing 122, the evaporation tube 121 is disposed in the evaporation housing 122, the evaporation housing 122 is in communication with the condensation housing 112, and the evaporation tube 121 is used for flowing an evaporation medium. The condenser 110 is integrally provided with the evaporator 120; gaseous carbon dioxide enters the condensation housing 112 through the gas phase inlet 1121, is condensed into liquid carbon dioxide when passing through the condensation pipe 111 through which the condensation medium flows, and is stored in the evaporation housing 122, and is evaporated and gasified into gaseous carbon dioxide when passing through the evaporation medium in the evaporation pipe 121, and the gaseous carbon dioxide enters the condensation housing 112 and flows out through the gas phase outlet 1122.

The condenser 110 and the evaporator 120 are main structures of the evaporative condensing device 100, the condenser 110 is used for condensing and liquefying carbon dioxide, condensing gaseous carbon dioxide into liquid carbon dioxide, the evaporator 120 is used for evaporating and gasifying carbon dioxide, and evaporating and gasifying the liquid carbon dioxide into gaseous carbon dioxide. The condenser 110 is in communication with the evaporator 120, the condenser 110 is in fluid communication with the gaseous carbon dioxide, and the evaporator 120 is in fluid communication with the liquid carbon dioxide.

In the energy storage process, after the gaseous carbon dioxide compressed by the energy storage device 400 enters the condenser 110, the condenser 110 condenses and liquefies the gaseous carbon dioxide, absorbs sensible heat and latent heat of the gaseous carbon dioxide, converts the sensible heat and latent heat into liquid carbon dioxide, and enters the evaporator 120 through the condenser 110 and is stored in the evaporator 120. During energy release, the evaporator 120 evaporates and gasifies the liquid carbon dioxide, heats the liquid carbon dioxide to evaporate and gasify the liquid carbon dioxide to form gaseous carbon dioxide, and the gaseous carbon dioxide enters the condenser 110 through the evaporator 120 and enters the expansion device 500 through the condenser 110 to generate electricity.

Moreover, the condenser 110 is integrally provided with the evaporator 120. In this way, the connecting pipe 114 between the condenser 110 and the evaporator 120 can be reduced, the resistance loss of the carbon dioxide flowing between the condenser 110 and the evaporator 120 can be reduced, the energy loss of the carbon dioxide in the gas-liquid phase transformation process can be effectively reduced, and the energy storage efficiency and the energy utilization rate can be improved. Meanwhile, after the condenser 110 and the evaporator 120 are integrated, the occupied area of the condenser and the evaporator can be reduced, so that the occupied area of the gas-liquid phase-change carbon dioxide energy storage system 10 is reduced, and the equipment cost of the carbon dioxide gas-liquid phase change is reduced.

The condenser 110 includes a condenser tube 111 and a condenser case 112. The condensing housing 112 is a housing of the condenser 110, the condensing housing 112 is a hollow structure, and the condensing tube 111 is installed in the condensing housing 112. The condensing tube 111 is provided for the condensing medium to flow, and the condensing tube 111 and the condensing shell 112 are enclosed to form a shell side space of the condenser 110, namely a condensing cavity 113. The gaseous carbon dioxide flows in the condensation cavity 113. Meanwhile, the condensing housing 112 has a gas phase inlet 1121 and a gas phase outlet 1122. The gas phase inlet 1121 communicates with the gas phase outlet 1122 to the condensation cavity 113, and gaseous carbon dioxide enters the condensation cavity 113 of the condensation housing 112 through the gas phase inlet 1121, and gaseous carbon dioxide in the condensation cavity 113 flows out of the condensation housing 112 through the gas phase outlet 1122.

When the condenser 110 condenses, the condensing medium enters the condenser tube 111 and flows in the condenser tube 111, and at the same time, the gaseous carbon dioxide enters the condensing cavity 113 through the gas phase inlet 1121, and exchanges heat with the condensing medium in the condenser tube 111, and the condensing medium absorbs sensible heat and latent heat of the gaseous carbon dioxide in the condensing cavity 113, so that the gaseous carbon dioxide condenses into liquid carbon dioxide, and enters and is stored in the evaporator 120 through the condensing shell 112.

The evaporator 120 includes an evaporation tube 121 and an evaporation housing 122. The evaporation case 122 is a housing of the evaporator 120, the evaporation case 122 is a hollow structure, and the evaporation tube 121 is installed in the evaporation case 122. The evaporation tube 121 is provided for the evaporation medium to flow, and the evaporation tube 121 and the evaporation shell 122 are enclosed to form a shell side space of the evaporator 120, namely an evaporation cavity 123. The vaporization cavity 123 is capable of storing and flowing liquid carbon dioxide. The gaseous carbon dioxide, after condensation, flows into the evaporation cavity 123 of the evaporation housing 122 and is stored in the evaporation cavity 123.

When the evaporator 120 evaporates, the evaporating medium flows through the evaporating pipe 121, and the liquid carbon dioxide in the evaporating cavity 123 can be vaporized by heating, so that the liquid carbon dioxide is vaporized into gaseous carbon dioxide, and the gaseous carbon dioxide enters the condensing housing 112 through the evaporating housing 122, and then flows out of the condenser 110 through the gas phase outlet 1122. In the evaporation and condensation apparatus 100 according to the present utility model, the evaporator 120 does not operate when the condenser 110 condenses; when the evaporator 120 is operated, the condenser 110 is not operated. Therefore, the evaporative condensing device 100 can achieve the purpose of carbon dioxide gas-liquid phase transition conversion, and the influence on the carbon dioxide gas-liquid conversion process is avoided.

In the evaporation-condensation device 100 of the above embodiment, the condenser 110 and the evaporator 120 are integrally arranged, and the two phases of carbon dioxide gas and liquid are converted and utilized through the integration of the condenser 110 and the evaporator 120, so that compared with the mode that the condenser 110 and the evaporator 120 of the existing carbon dioxide gas and liquid phase change energy storage technology are connected by a series of pipelines, the integrated arrangement of the condenser 110 and the evaporator 120 greatly reduces the length of the pipelines, further reduces the energy loss of carbon dioxide in the gas and liquid phase change recycling process, reduces the number of heat exchange devices, pipelines and related devices, optimizes the technological process of the carbon dioxide energy storage technology, and improves the efficiency and the energy utilization rate of the energy storage system. Meanwhile, after the condenser 110 and the evaporator 120 in the evaporation and condensation device 100 are integrated, the occupied area of the equipment can be reduced, the equipment cost of the whole energy storage system is reduced, and the popularization and the use of the gas-liquid phase carbon dioxide energy storage system 10 are facilitated.

Optionally, the condensation tube 111 has a condensation inlet 1111 and a condensation outlet 1112, and the condensation inlet 1111 and the condensation outlet 1112 are disposed at two ends of the condensation tube 111. The condensing medium enters the condensing tube 111 through the condensing inlet 1111, and flows through the condensing tube 111 to absorb heat and raise temperature, and the condensed medium after absorbing heat flows out of the condensing tube 111 through the condensing outlet 1112. Optionally, the condensation inlet 1111 and the condensation outlet 1112 are disposed outside the condensation housing 112. This makes it possible to facilitate the connection of the condensation duct 111 to an external cold source. The cold source can continuously input a condensing medium with working temperature into the condensing tube 111 through the condensing inlet 1111, absorb sensible heat and latent heat of gaseous carbon dioxide to continuously cool the gaseous carbon dioxide, and the condensed medium after heat absorption returns to the cold source from the condensing tube 111 through the condensing outlet 1112 to be cooled to the working temperature, so that the condensing medium can be recycled in the condensing tube 111. The working temperature of the condensing medium is lower than the condensing temperature of the carbon dioxide, and the structural form of the cold source is not described herein.

Alternatively, the evaporation tube 121 has an evaporation inlet 1211 and an evaporation outlet 1212, and the evaporation inlet 1211 and the evaporation outlet 1212 are disposed at two ends of the evaporation tube 121. The evaporating medium enters the evaporating pipe 121 through the evaporating inlet 1211, and flows in the evaporating pipe 121 to evaporate and gasify, and the evaporating medium after heat release flows out of the evaporating pipe 121 through the evaporating outlet 1212. Optionally, the evaporation inlet 1211 and the evaporation outlet 1212 are disposed outside the evaporation housing 122. This can facilitate the connection of the evaporation tube 121 to an external heat source. The external heat source can heat the exothermic evaporating medium to the working temperature, so that the evaporating medium can be recycled in the evaporating tube 121. The working temperature of the evaporating medium is higher than the carbon dioxide evaporating temperature, and the structural form of the heat source is not described here again.

Optionally, the condensation inlet 1111 is disposed on the same side or different side of the condensation housing 112 than the condensation outlet 1112. Optionally, the evaporation inlet 1211 is disposed on the same side or on a different side of the evaporation housing 122 than the evaporation outlet 1212.

Referring to fig. 1-4 and 7-9, in one embodiment, the condenser 110 is disposed above the evaporator 120. The condenser 110 is located above and the evaporator 120 is located below. Thus, after the gaseous carbon dioxide is condensed and liquefied into liquid carbon dioxide in the condenser 110, the liquid carbon dioxide can flow into the evaporator 120 by its own weight and be stored in the evaporation cavity 123 of the evaporator 120. After the liquid carbon dioxide is vaporized in the vaporizer 120 to gaseous carbon dioxide, the gaseous carbon dioxide flows upward into the condensing cavity 113 of the condenser 110.

Referring to fig. 1, in the first embodiment of the present utility model, the condensation housing 112 is provided separately from and stacked on the evaporation housing 122. The evaporative condensing apparatus 100 further includes a communication pipe 114, the communication pipe 114 communicating the condensing housing 112 with the evaporating housing 122. That is, the condenser 110 and the evaporator 120 are independent members, the condenser 110 is stacked above the evaporator 120, and the condenser 110 and the evaporator 120 are formed in an overlapping shape.

The condensing cavity 113 of the condenser 110 is independent from the evaporating cavity 123 of the evaporator 120 and is connected through the communicating pipe 114 such that the condensing cavity 113 of the condenser 110 is communicated with the evaporating cavity 123 of the evaporator 120. In this way, the liquefied liquid carbon dioxide condensed by the condenser 110 enters the evaporation cavity 123 through the communication pipe 114, and the gaseous carbon dioxide evaporated and gasified by the evaporator 120 enters the condensation cavity 113 through the communication pipe 114.

The number of the communication pipes 114 is not limited in principle as long as it is ensured that carbon dioxide can smoothly flow between the condensation cavity 113 and the evaporation cavity 123. Alternatively, the communication pipe 114 is a separate pipe, one end of the communication pipe 114 is connected to the condensation cavity 113, and the other end of the communication pipe 114 is connected to the evaporation cavity 123. The condensation process of the gaseous carbon dioxide is as follows: the condensing medium enters the condensing tube 111 from the condensing inlet 1111, the gaseous carbon dioxide enters the condensing cavity 113 of the condenser 110 from the gas phase inlet 1121, and the condensing medium absorbs the heat of the gaseous carbon dioxide by heat conduction and convection heat exchange, so that the gaseous carbon dioxide is condensed and liquefied, and the liquid carbon dioxide enters the evaporating cavity 123 of the evaporator 120 through the communicating tube 114 below the condenser 110 and is stored in the evaporating cavity 123 of the evaporator 120. The evaporation process of the liquid carbon dioxide in the evaporator 120 is that the evaporation medium in the evaporation pipe 121 heats the liquid carbon dioxide in the evaporation cavity 123, the liquid carbon dioxide absorbs heat, and is converted into gaseous carbon dioxide after phase change heat exchange, and the gaseous carbon dioxide enters the condenser 110 through the communicating pipe 114 and is further conveyed into the expansion device 500.

Referring to fig. 2-9, in one embodiment, the condensing housing 112 is integrally formed with the evaporating housing 122 to form a mounting housing 130. That is, the condenser 110 and the evaporator 120 adopt the same housing, that is, the condensation tube 111 of the condenser 110 and the evaporation tube 121 of the evaporator 120 are located in the installation housing 130, the condensation tube 111 and the inner wall of the installation housing 130 enclose a condensation cavity 113, and the evaporation tube 121 and the inner wall of the installation housing 130 enclose an evaporation cavity 123.

Referring to fig. 2 to 4, in the second embodiment of the present utility model, the condensation duct 111 and the evaporation duct 121 are located in the installation housing 130, and the condensation duct 111 is located above the evaporation duct 121. That is, the condensation duct 111 is in the same space as the evaporation duct 121 in which the housing 130 is installed, and the condensation duct 111 is located above and the evaporation duct 121 is located below. Since the density of gaseous carbon dioxide is less than that of liquid carbon dioxide. The condenser 110 condenses and liquefies into liquid carbon dioxide, which is stored in the lower space of the installation housing 130, and the gaseous carbon dioxide evaporated and gasified by the evaporator 120 moves to the upper space of the installation housing 130, i.e., the lower space of the installation housing 130 is the evaporation cavity 123, and the upper space is the condensation cavity 113. The gas phase inlet 1121 and the gas phase outlet 1122 are located at the top of the installation housing 130 to correspond to the condensation duct 111.

The condensation process of the gaseous carbon dioxide is as follows: gaseous carbon dioxide enters the installation housing 130 through the gas phase inlet 1121, the upper condensation pipe 111 condenses and liquefies the gaseous carbon dioxide above the installation housing 130, and the condensed liquid carbon dioxide is accumulated and stored in the lower cavity of the installation housing 130. The evaporation process of the gaseous carbon dioxide is as follows: the evaporation medium is fed into the evaporation tube 121 from the outside heat source downward, the liquid carbon dioxide below the installation housing 130 is heated, and after absorbing heat, the liquid carbon dioxide is converted into a gaseous state, and the gaseous carbon dioxide rises above the installation housing 130 and is fed into the expansion device 500 through the gas phase outlet 1122.

Alternatively, the evaporative condensing unit 100 is disposed in a vertical or horizontal configuration. As shown in fig. 2 and 3, the evaporative condensing unit 100 is disposed in a horizontal configuration. As shown in fig. 4, the evaporative condensing unit 100 is disposed in a vertical manner.

Referring to fig. 5 and 6, in the third embodiment of the present utility model, the condensation pipe 111 and the evaporation pipe 121 are integrally formed to form a heat exchange pipe 140, and the heat exchange pipe 140 is disposed in the installation housing 130. When the evaporation and condensation device 100 condenses, the condensing medium flows through the heat exchange tube 140, and when the evaporation and condensation device 100 evaporates, the evaporating medium flows through the heat exchange tube 140.

In the gas-liquid phase change process of the carbon dioxide, the condensation process and the evaporation process are mutually independent, namely, the evaporation process is not performed when the condensation process is performed, and the condensation process is not performed when the evaporation process is performed. Therefore, the evaporation-condensation device 100 of the present utility model can use the same heat exchange tube 140 to realize condensation and evaporation respectively.

That is, the condensation duct 111 and the evaporation duct 121 are integrally formed to form the heat exchange duct 140. When the evaporative condensing device 100 condenses and liquefies the gaseous carbon dioxide, a condensing medium is introduced into the heat exchange tube 140, and the gaseous carbon dioxide is liquefied by the condensing medium. When the evaporation and condensation device 100 evaporates and gasifies the liquid carbon dioxide, the evaporation medium is introduced into the heat exchange tube 140, and the liquid carbon dioxide is gasified by the evaporation medium.

Alternatively, the evaporative condensing unit 100 is disposed in a vertical or horizontal configuration. As shown in fig. 5, the evaporative condensing unit 100 is disposed in a horizontal configuration. As shown in fig. 6, the evaporative condensing unit 100 is disposed in a vertical manner.

The condensation process of the gaseous carbon dioxide is as follows: after the condensing medium enters the heat exchange coil 140, the gaseous carbon dioxide enters the installation shell 130 from the gas phase inlet 1121, the condensing medium absorbs sensible heat and latent heat of the gaseous carbon dioxide through the heat exchange coil 140 in a heat conduction and convection heat exchange mode, and the gaseous carbon dioxide is condensed and liquefied and accumulated at the bottom of the installation shell 130. The evaporation process of the liquid carbon dioxide is that the evaporating medium enters the heat exchange coil 140 from the inlet of the heat exchange coil 140, and heats the liquid carbon dioxide in the installation shell 130 to absorb heat and evaporate the liquid carbon dioxide to be converted into gaseous carbon dioxide. The gaseous carbon dioxide rises upward in the installation housing 130 and is sent out through the gas phase outlet 1122.

Referring to fig. 1 to 9, in an embodiment, the evaporative condensing apparatus 100 further includes a storage tank (not shown), a liquid phase pipe 124 is disposed on the evaporator 120, and the storage tank is connected to the evaporator 120 through the liquid phase pipe 124. The evaporative condensing device 100 of the present utility model may employ the evaporation housing 122 of the evaporator 120 as a storage space for liquid carbon dioxide. When the liquid carbon dioxide stored in the evaporation case 122 is excessive, a liquid phase pipe 124 may be provided at the bottom of the evaporator 120, and a storage tank outside the evaporator 120 may be connected through the liquid phase pipe 124, and the liquid carbon dioxide is stored in the storage tank and the evaporator 120.

Alternatively, the number of the storage tanks may be 1 or more. The storage tanks and the evaporator 120 may be connected in series by 1 or more storage tanks and then connected to the evaporator 120, or may be connected in series by 1 or more storage tanks and then connected to the evaporator 120. Also, when the evaporator 120 evaporates the liquid carbon dioxide, the liquid carbon dioxide in the storage tank may flow back into the evaporation cavity 123 through the liquid phase pipe 124. The external storage tank can increase the processing capacity of the gaseous carbon dioxide and the storage space of the liquid carbon dioxide of the evaporation and condensation device 100, so as to realize low cost and improve the optimal solution of the efficiency and the energy utilization rate of the energy storage system.

Optionally, a liquid phase tube 124 is provided at the bottom of the evaporation housing 122. Optionally, the liquid-phase tube 124 includes a liquid-phase inlet and a liquid-phase outlet, which are respectively connected to the evaporation shell 122 and the storage tank. The liquid carbon dioxide in the evaporator 120 enters the storage tank through the liquid phase outlet, and the liquid carbon dioxide in the storage tank enters the evaporator 120 through the liquid phase inlet.

Referring to fig. 7 to 9, in an embodiment, the evaporation and condensation apparatus 100 further includes a gas-liquid separation part 150, and the gas-liquid separation part 150 is disposed above a gas phase outlet or an evaporation pipe 121 of the evaporation and condensation apparatus 100. The separation of the gaseous carbon dioxide and the liquid carbon dioxide is realized through the gas-liquid separation component 150, so that the liquid carbon dioxide is prevented from being carried before the carbon dioxide which is vaporized and gasified into the gaseous carbon dioxide enters the expansion device 500, and therefore, the gaseous carbon dioxide carrying the carbon dioxide droplets is prevented from impacting an expander of the expansion device 500 or reducing the thermal efficiency of a heat exchange device in the expansion device 500, a pipeline and other equipment, and the normal operation of the equipment is ensured.

It will be appreciated that as the liquid carbon dioxide evaporates and gasifies to gaseous carbon dioxide, the gaseous carbon dioxide will move from the evaporation cavity 123 at the bottom of the mounting housing 130 to the condensation cavity 113 at the top of the mounting housing 130 under the influence of the gas inertia. During the rising process of the gaseous carbon dioxide, gas-liquid entrainment is generated, so that the gas-liquid two-phase in the gas phase outlet 1122 pipeline is impacted against the pipe wall to cause abnormal sound, impact the expansion device or reduce expansion Thermal efficiency of heat exchange device in device _， Which may be dangerous for the proper operation of the pipeline and the expansion device 500.

Therefore, the vapor-condensing device 100 of the present utility model includes the gas-liquid separation member 150, and the gas-liquid separation member 150 is provided above the evaporation pipe 121 or at the gas phase outlet 1122 in the installation housing 130. The gas-liquid separation component 150 can separate gaseous carbon dioxide from liquid carbon dioxide, avoid gas-liquid entrainment, further avoid liquid carbon dioxide from impacting the expansion device 500, pipelines and other devices, and ensure normal operation of the devices.

It should be noted that the gas-liquid separation component 150 may be selected according to different separation principles and design process requirements, and different separators or separation structures, such as a gas-liquid two-phase separator, for example, a cyclone separator, a heat exchange separator, etc., and separation structures, such as a wire mesh demister, a corrugated plate demister, etc. Hereinafter, the vapor-liquid separation member 150 is disposed in the vertical evaporation and condensation device 100 as an example, and the condensation housing 112 of the condenser 110 and the evaporation housing 122 of the evaporator 120 are integrally mounted with the housing 130, so that the principle of disposing the vapor-liquid separation member 150 in the evaporation and condensation device 100 with other structural forms is substantially the same as that of disposing the vapor-liquid separation member 150 in the vertical evaporation and condensation device 100, and will not be described herein.

Referring to fig. 7, in an embodiment, the gas-liquid separation member 150 is a screen separation member 151. The screen separating member 151 is in the form of a net-like structure. The screen separation part 151 uses the screen gas-liquid separation principle, gas molecules can pass through the screen gaps, and liquid molecules can be separated by blocking. Alternatively, the screen separation member 151 is a screen demister or other screen structure capable of gas-liquid separation.

After the liquid carbon dioxide absorbs heat and evaporates and then is converted into gaseous carbon dioxide, after the gaseous carbon dioxide flows through the wire mesh demister, liquid drops carried in the gaseous carbon dioxide are intercepted by the wire mesh separating part 151, or the liquid drops carried in the gaseous carbon dioxide pass through the wire mesh separating part 151, the gaseous carbon dioxide selects a channel with smaller resistance to flow, the streamline deflects, the liquid drops have momentum, and the liquid at the center of the gaseous carbon dioxide impacts the wire mesh separating part 151 under the inertia effect, so that gas-liquid separation is realized, and the problem that the liquid drops are carried in the gaseous carbon dioxide is effectively solved.

Referring to fig. 8 and 9, in an embodiment, the gas-liquid separation member 150 is a baffle separation member 152. The baffle separating member 152 is provided in a porous shape. That is, the shutter separating member 152 is a partition plate 1521 having a through hole. The baffle separating member 152 utilizes the baffle separating principle, and when the gas and the liquid are mixed and flow, if the gas is blocked and the gas is deflected to move, the liquid flowing forward under the inertia effect is blocked by the baffle separating member 152, and finally the liquid and the liquid are collected together under the gravity effect.

The baffle separating member 152 includes at least one porous partition plate 1521, and when the number of the partition plates 1521 is plural, the plural partition plates 1521 are arranged at intervals, and the through holes on adjacent partition plates 1521 are partially offset, and/or the diameter sizes of the through holes on adjacent partition plates 1521 are different.

Alternatively, the barrier separation member 152 includes a partition 1521, the partition 1521 having a plurality of through holes. The partition plate 1521 is disposed between the condenser tube 111 and the evaporator tube 121. When gaseous carbon dioxide entrains liquid carbon dioxide to contact the partition plate 1521, the droplets collide with the partition plate 1521, and the gaseous carbon dioxide passes through the through-holes. The through holes in the divider 1521 allow gaseous carbon dioxide to pass through and droplets of carbon dioxide drop by gravity into the vaporization cavity 123.

Alternatively, the baffle separating member 152 includes a plurality of partition plates 1521, and the plurality of partition plates 1521 are disposed at intervals along the height direction, i.e., the vertical direction, of the evaporation-condensation device 100. In this way, when the liquid drops carried by the gaseous carbon dioxide flow, the gas-liquid separation is performed through multi-layer blocking, so that the problem of gas-liquid entrainment is effectively solved, and the gaseous carbon dioxide is prevented from carrying liquid into the pipeline, the expansion device 500 and other devices.

Alternatively, the diameters of the through holes on adjacent divider plates 1521 are different. Thus, when the through holes of the multi-layer separation plate 1521 are communicated to form a gas flow channel, the gas flow channel is bent, and when the gaseous carbon dioxide entrains droplets to pass through the bent gas flow channel, the droplets can collide, so that the purpose of gas-liquid separation is achieved. Optionally, the through hole portions on adjacent divider plates 1521 are offset. Thus, when the through holes of the multi-layer separation plate 1521 are communicated to form a gas flow channel, the gas flow channel is bent, and when the gaseous carbon dioxide entrains droplets to pass through the bent gas flow channel, the droplets can collide, so that the purpose of gas-liquid separation is achieved. Of course, alternatively, the diameters of the through holes on adjacent partition plates 1521 are different, and the through holes on adjacent partition plates 1521 are staggered.

The multi-layer separation plates 1521 are adopted to block the liquid drops in the gaseous carbon dioxide from flowing, and the sizes of the through holes on each separation plate 1521 can be slightly different so as to meet different separation requirements. Illustratively, the baffle separating unit 152 includes three-layered separation plates 1521, the three-layered separation plates 1521 are disposed at intervals, and the distance between the three-layered separation plates 1521, the diameter of the through holes, and the number of the through holes can be set according to the requirements to form a bent air flow channel, so as to effectively solve the problem of gas-liquid entrainment.

Optionally, the gas flow channels formed by the through hole connection lines on the multi-layer partition plate 1521 are arranged in a bent and/or curved manner, so that when the gaseous carbon dioxide entrains the liquid drops to flow through the gas flow channels, the liquid drops collide with the inner walls of the gas flow channels, and the purpose of gas-liquid separation is achieved. Illustratively, the airflow channels formed by the through-hole connections on the multi-layer divider 1521 are hyperbolic or zigzag shaped, etc.

Of course, in other embodiments of the present utility model, the baffle separating unit 152 may be a corrugated plate or other structure capable of achieving gas-liquid separation.

Referring to fig. 1 to 10, the evaporation and condensation device 100 of the present utility model integrates the condenser 110 and the evaporator 120 in an integrated manner, so that the condenser 110 and the evaporator 120 are integrated into a whole, the evaporator 120 is directly connected with the condenser 110, the length of a pipeline between the condenser 110 and the evaporator 120 and a storage device are reduced, further, the resistance loss of carbon dioxide in the gas-liquid phase change recycling process is reduced, the number of pipelines and related devices is reduced, the technological process of carbon dioxide energy storage technology is optimized and improved, and the efficiency and the energy utilization rate of the energy storage system are improved. Meanwhile, the evaporative condensing device 100 can complete the functions of condensing, storing and evaporating carbon dioxide, and the integrated condenser 110 and evaporator 120 can reduce the occupied area of the equipment and the equipment cost of carbon dioxide energy storage.

Referring to fig. 1 to 10, the present utility model further provides a gas-liquid phase-to-carbon dioxide energy storage system 10, which includes a gas storage 300, an energy storage device 400, an expansion device 500, and the evaporation-condensation device 100 according to any of the foregoing embodiments, where the evaporation-condensation device 100 is connected to one end of the energy storage device 400 and one end of the expansion device 500, and the gas storage 300 is connected to the other end of the energy storage device 400 and the other end of the expansion device 500.

The gas storage 300 stores carbon dioxide at normal temperature and normal pressure. When the gas-liquid phase carbon dioxide energy storage system 10 stores energy, the energy storage device 400 compresses the carbon dioxide using surplus or redundant power and stores thermal energy during the compression process. During energy storage, the evaporative condensing device 100 absorbs sensible heat and latent heat of the compressed carbon dioxide through an external cold source, so that the gaseous carbon dioxide is liquefied into liquid carbon dioxide and stored in the evaporation cavity 123. Upon release of energy, the evaporative condensing device 100 absorbs heat so that the liquid carbon dioxide is vaporized into gaseous carbon dioxide and enters the condensing cavity 113, through the vapor phase outlet 1122 of the condensing cavity 113, and into the expansion device 500. The gaseous carbon dioxide drives the expander in the expansion device 500 to move, and the expander drives the generator to generate electricity.

It should be noted that the structures of the air storage 300, the energy storage device 400 and the expansion device 500 are in the prior art, and the air storage 300, the energy storage device 400 and the expansion device 500 can refer to the air storage, the compression energy storage portion and the expansion energy release portion of the chinese patent application publication nos. CN112985143B, CN112985144B and CN112985145B, which are not described herein. After the vapor-liquid phase carbon dioxide energy storage system 10 adopts the evaporation condensing device 100 in the embodiment, the resistance loss of carbon dioxide in the vapor-liquid phase cyclic utilization process can be reduced, the number of pipelines and related equipment is reduced, the technological process of carbon dioxide energy storage technology is optimized and improved, and the efficiency and the energy utilization rate of the energy storage system are improved. Meanwhile, the occupied area of the equipment can be reduced, and the equipment cost of carbon dioxide energy storage is reduced.

In an embodiment, the gas-liquid phase-to-liquid phase carbon dioxide energy storage system 10 includes a plurality of the evaporation-condensation devices 100, and a plurality of the evaporation-condensation devices 100 are connected in parallel between the energy storage device 400 and the expansion device 500. One end of the plurality of evaporative condensing units 100 is simultaneously connected to the energy storage device 400, and the other end is simultaneously connected to the expansion device 500. This can ensure the energy storage efficiency of carbon dioxide.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An evaporative condensing device for effecting condensation and evaporation of carbon dioxide, the evaporative condensing device comprising:

2. The evaporative condensing device according to claim 1, wherein the condenser is disposed above the evaporator.

3. The evaporative condensing device according to claim 2, wherein the condensing housing is independent of and stacked on the evaporative housing;

4. The evaporative condensing device according to claim 2, wherein the condensing housing is of unitary construction with the evaporative housing forming a mounting housing;

5. The evaporative condensing device of claim 1, wherein the condensing housing and the evaporative housing are integrally formed to form a mounting housing, the condensing tube and the evaporative tube are integrally formed to form a heat exchange tube, the heat exchange tube being disposed in the mounting housing;

6. The evaporative condensing device according to any one of claims 1 to 5, further comprising a storage tank, wherein a liquid phase pipe is provided on the evaporator, and the storage tank is communicated with the evaporator through the liquid phase pipe.

7. The evaporative condensing apparatus of any one of claims 1 to 5, further comprising a gas-liquid separation member disposed above the gas phase outlet or the evaporating pipe.

8. The evaporative condensing apparatus of claim 7, wherein the vapor-liquid separation means is a vapor-liquid two-phase separator disposed at the vapor outlet; or,

9. A gas-liquid phase-change carbon dioxide energy storage system, comprising a gas storage, an energy storage device, an expansion device and an evaporation and condensation device according to any one of claims 1 to 8, wherein the evaporation and condensation device is connected with one end of the energy storage device and one end of the expansion device, and the gas storage is connected with the other end of the energy storage device and the other end of the expansion device.

10. The gas-liquid phase change carbon dioxide energy storage system of claim 9, wherein the gas-liquid phase change carbon dioxide energy storage system comprises a plurality of the evaporative condensing devices, the plurality of the evaporative condensing devices being disposed in parallel between the energy storage device and the expansion device.