CN117145271A - Working medium storage system and physical energy storage system - Google Patents

Abstract

The embodiment of the invention discloses a working medium storage system and a physical energy storage system, wherein the working medium storage system disclosed by the embodiment of the invention comprises a working medium storage device which is arranged on the ground; the working medium storage device comprises at least one storage tank, wherein the at least one storage tank is used for storing liquid energy storage working medium; and the sunshade component shields the sunlight on the upper part of the working medium storage device. The working medium storage system and the physical energy storage system disclosed by the embodiment of the invention can effectively prevent the working medium storage device from sun-screening, prevent the problem of overpressure caused by the increase of the pressure in the storage tank, and reduce potential safety hazards.

Description

Working medium storage system and physical energy storage system

Technical Field

The invention relates to the technical field of energy storage, in particular to a working medium storage system and a physical energy storage system.

Background

Energy storage technologies are divided into chemical energy storage and physical energy storage. Carbon dioxide energy storage is a novel physical energy storage technology using carbon dioxide as a working medium, and realizes carbon dioxide compression energy storage and expansion energy release based on carbon dioxide gas-liquid phase change (carbon dioxide compression expansion). The carbon dioxide energy storage technology can be referred to in chinese patents CN112985144B, CN112985145B and CN114109549B, the disclosures of which are incorporated herein by reference in their entireties. The existing carbon dioxide energy storage system comprises a liquid storage tank for storing compressed carbon dioxide working medium. The existing carbon dioxide energy storage system is arranged in the open air, when the existing carbon dioxide energy storage system is irradiated by the sun, the temperature of the surface of the liquid storage tank is increased by solar radiation energy, a part of heat is transferred to the inside of the liquid storage tank, the temperature of working media stored in the liquid storage tank is increased, the pressure is increased, and overpressure of the liquid storage tank is caused.

Disclosure of Invention

Therefore, in order to overcome at least one defect in the prior art, the embodiment of the invention provides a working medium storage system and a physical energy storage system, so as to solve the problem that the temperature rise is easily caused by sun irradiation when a liquid storage tank is placed in the open air in the existing physical energy storage system.

One embodiment of the invention provides a working medium storage system, which comprises a working medium storage device arranged on the ground; the working medium storage device comprises at least one storage tank, wherein the at least one storage tank is used for storing liquid energy storage working medium; and the sunshade component shields the sunlight on the upper part of the working medium storage device.

In one embodiment, the sunshade assembly is provided as a sunshade comprising a support structure and a canopy cover covering the top of the support structure; the support structure is arranged on the periphery of the working medium storage device, and the top of the support structure is higher than the top of the working medium storage device.

In one embodiment, the sunshade assembly comprises a solar energy collection structure for collecting and converting solar energy, the solar energy collection structure being disposed on the canopy; or the canopy is the solar energy collection structure.

In one embodiment, the solar collection structure is a solar collector or a photovoltaic solar panel.

In one embodiment, the working medium storage device comprises a first storage tank unit arranged on the ground; a second tank unit stacked on top of the first tank unit; the first storage tank and the second storage tank are horizontal tank bodies.

In one embodiment, the first storage tank unit and the second storage tank unit each comprise a tank body and a heat insulation layer, and the heat insulation layer is coated on the surface of the tank body.

In one embodiment, the first storage tank unit is provided with a first cavity for containing the liquid energy storage working medium, and a first connecting port communicated with the first cavity is arranged on the first storage tank unit; the second storage tank unit is provided with a second cavity for containing the liquid energy storage working medium, and a second connection port communicated with the second cavity is arranged on the second storage tank unit; the storage tank further comprises a connecting hose connected between the first connecting port and the second connecting port, and the first cavity and the second cavity are mutually communicated through the connecting hose.

In one embodiment, the first connection port is disposed at the top of the first tank unit, and the second connection port is disposed at the bottom of the second tank unit and opposite to the first connection port.

The embodiment of the invention also provides a physical energy storage system, which comprises the working medium storage system as described in any one of the above, and further comprises an air storage, an energy storage component and an energy release component, wherein the air storage, the energy storage component, the working medium storage system and the energy release component are sequentially connected in a closed loop.

In one embodiment, the physical energy storage system further comprises a heat exchange medium storage structure; the heat exchange medium storage structure is used for storing heat exchange medium; the sunshade assembly comprises a solar energy collecting structure which is connected with the heat exchange medium storage structure; the solar energy collecting structure is used for converting solar energy into heat energy, and the heat exchange medium can absorb the heat energy and heat; or, the solar energy collecting structure is used for converting solar energy into electric energy, the physical energy storage system further comprises an electric heating component, the electric heating component is connected with the heat storage component and is electrically connected with the solar energy collecting structure, and the electric heating component is used for heating up the heat exchange medium by utilizing the electric energy. As can be seen from the above, the above embodiments of the present invention can achieve one or more of the following advantages: (1) By arranging the sunshade component on the working medium storage device, sunlight can be shielded, the problem that the working medium storage device is subjected to solar radiation to raise the temperature and increase the pressure in the storage tank to cause overpressure can be prevented, and potential safety hazards are reduced; (2) The sun-shading component comprises a solar energy collecting structure, so that solar energy can be collected and utilized, the sun-shading effect is achieved, the external energy can be effectively utilized, and a heat source is provided for a physical energy storage system such as a gas-liquid two-phase carbon dioxide energy storage system.

Drawings

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a working medium storage system according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a working medium storage system according to another embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a working medium storage system according to another embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a working medium storage system according to another embodiment of the present invention.

Fig. 5 is a schematic diagram of a front view of a storage tank in a working medium storage system according to an embodiment of the present invention.

Fig. 6 is a left side schematic view of the tank shown in fig. 5.

Fig. 7 is a schematic structural diagram of a storage tank in a working medium storage system according to another embodiment of the present invention.

Fig. 8 is a partially enlarged schematic view of region B in fig. 5.

FIG. 9 is a schematic diagram of a storage tank in a working fluid storage system according to another embodiment of the present invention.

Fig. 10 is a schematic top view of a working medium storage system according to an embodiment of the present invention.

Fig. 11 is a schematic view of section A-A of fig. 10.

FIG. 12 is a left side elevational schematic of the fluid storage system of FIG. 10.

Fig. 13 is a schematic elevational view of a working medium storage system according to another embodiment of the present invention.

Fig. 14 is a schematic diagram of a relationship between a working medium storage system and a solar irradiation angle according to an embodiment of the present invention.

FIG. 15 is a schematic diagram of a relationship between a working medium storage system and a solar irradiation angle according to another embodiment of the present invention.

Fig. 16 is a schematic diagram of a physical energy storage system according to an embodiment of the present invention.

Fig. 17 is a schematic diagram of a physical energy storage system according to another embodiment of the present invention.

Fig. 18 is a schematic diagram illustrating a connection relationship between a solar energy collection structure and a heat exchange medium storage structure according to an embodiment of the present invention.

[ reference numerals description ]

10: a storage tank; 11: a first tank unit; 111: a first tank; 1111: a first bottom; 1112: a first top; 1113: a first connection port; 1114: a working medium inlet; 1115: a working medium outlet; 112: a first bracket; 113: a second bracket; 114: a first heat-retaining layer; 12: a second tank unit; 121: a second tank; 1211: a second bottom; 1212: a second top; 1213: a second connection port; 122: a second bracket; 123: a second heat-insulating layer; 13: a connecting hose; 14: a third tank; 20: sunshade shed; 21: a support structure; 22: a canopy cover; 23: sunshade curtain; 24: a solar energy collection structure; 30: a support base; 40: ground surface; 50: a heat exchange medium storage structure; 51: a heat storage tank; 52: a cold storage tank; 60: an electric heating device; 100: a working medium storage system; 200: a gas storage; 300: an energy storage assembly; 400: and the energy release assembly.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings.

In order that those skilled in the art will better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be further noted that the division of the embodiments in the present invention is only for convenience of description, and should not be construed as a specific limitation, and features in the various embodiments may be combined and mutually referenced without contradiction.

In the related art, a physical energy storage system, such as a carbon dioxide energy storage system, generally includes an air storage, an energy storage component, a liquid storage tank (also referred to as an energy storage container) and an energy release component that are sequentially connected in a closed loop. Wherein, the gas storage is provided with the accommodation cavity that is used for holding gaseous carbon dioxide. The liquid storage tank (energy storage container) is used for storing liquid carbon dioxide or gas-liquid mixed carbon dioxide.

For carbon dioxide energy storage systems and the like based on gas-liquid change physical energy storage systems, a large storage device needs to be provided to store a large amount of liquid working media or gas-liquid mixed working media, and a single liquid storage tank is generally difficult to meet storage requirements, so that a plurality of liquid storage tanks are generally required to store the liquid working media or the gas-liquid mixed working media. Therefore, the occupied area of the liquid storage tank in the physical energy storage system is usually larger, and on the other hand, the liquid storage tank in the existing energy storage system is arranged in the open air in order to be timely dispersed when working medium (such as carbon dioxide) leaks. When the solar energy is irradiated by the sun, the solar energy can raise the temperature of the surface of the liquid storage tank and transfer a part of heat to the inside of the liquid storage tank, and the liquid working medium or the gas-liquid mixed working medium absorbs heat, evaporates and heats up to easily cause the problem of overpressure caused by the increase of the pressure in the liquid storage tank.

Accordingly, an embodiment of the present invention provides a working fluid storage system 100, as shown in fig. 1, the working fluid storage system 100 comprising a working fluid storage device and a sunshade assembly 20.

The working medium storage device is disposed on the ground 40. The working medium storage device comprises at least one tank 10, each tank 10 of the at least one tank 10 for example comprising a stainless steel tank and a support structure connected to the tank for supporting the tank. At least one storage tank 10 is used for storing a liquid energy storage medium. For example, in a carbon dioxide energy storage system, the energy storage medium is carbon dioxide and the storage tank 10 is used to store liquid carbon dioxide.

Sunshade assembly 20 shields the upper portion of the working fluid storage means from sunlight. The sun-shading component 20 is arranged outside the working medium storage device, so that sunlight can be shielded, the problem that the temperature of the liquid working medium or the gas-liquid mixed working medium stored in the working medium storage device is increased due to solar radiation when the liquid working medium or the gas-liquid mixed working medium absorbs heat, evaporates and heats up can be prevented, the pressure in the storage tank 10 is increased, overpressure is avoided, and potential safety hazards are reduced.

Still further, as shown in fig. 1, the sunshade assembly 20 may be configured as a sunshade. The awning comprises a support structure 21 and an awning cover 22 covering the top of the support structure 21. The support structure 21 is arranged at the periphery of the working medium storage device, and the top of the support structure 21 is higher than the top of the working medium storage device. The supporting structure 21 includes a plurality of supporting columns, supporting beams, etc., and the material of the supporting structure 21 may be aluminum alloy or other light materials, or may be steel. The canopy 22 may be a lightweight roof material covering the top of the working medium storage device, and the canopy 22 may be made of color steel plate, sun-shading cloth, or the like. The sunshade assembly 20 is arranged as a sunshade, so that a sunshade effect can be provided for the working medium storage device 20, shielding can be provided for overhauling personnel, and wind, rain and insolation are prevented.

In some embodiments, the canopy 22 includes a central portion 221 and a peripheral portion 222 (refer to fig. 11) surrounding the central portion 221, and the canopy 22 is inclined from the central portion 221 to the peripheral portion 222 in a direction approaching the ground. For example, as shown in fig. 1, the canopy 22 is provided in a peaked structure with a center peak inclined toward both sides, to prevent accumulation of rain and snow. Of course, as shown in fig. 13, the canopy 22 may be provided in an arch-shaped roof structure, and the canopy may have an effect of preventing accumulation of rain and snow.

In this embodiment, the sunshade 20 can be specifically set in combination with the time period in which sunshade is actually required, for example, the temperature of sunlight is low before 9 am and after 5 pm, and even if sunlight irradiates the working medium storage device, the temperature change is not greatly caused. The edge of the canopy 22 in the sunshade 20 may thus be set to exceed the length of the working medium storage means, for example, the canopy 22 shown in fig. 14 is set to exceed the working medium storage means by a certain distance, and when the angle (acute angle) between the sun ray and the ground is between α1 and 90 °, no sunlight irradiates the working medium storage means. If it is desired to block sunlight at angles less than α1, the distance that the canopy 22 extends beyond the working medium storage device can be increased.

Alternatively, a sunshade 23 may be provided around the sides of the support structure 21, with the sunshade 23 extending to the ground 40 over a longer length to block sunlight at a smaller angle, depending on the angle at which the length of the sunshade 23 is provided to block light. For example, as shown in fig. 15, the canopy 22 is longer than the working medium storage device, but the upper part of the support structure 21 is shielded by the sunshade curtain 23, so that sunlight having an angle α2 (α2< α1) with the ground can be shielded, and the sunshade effect is better. Also, the sunshade curtain 23 surrounds the upper portion of the support structure 21, and the lower portion of the support structure 21 is not shielded for the worker to pass maintenance. Or when a stored working substance such as carbon dioxide leaks, the carbon dioxide can escape from the sunshade 20 through the lower region of the support structure 21, thereby reducing safety risks.

In some embodiments, the sunshade assembly 20 includes a solar collection structure 24. The solar energy collection structure 24 is used to collect and convert solar energy. The inclusion of the solar energy collection structure 24 in the sunshade assembly 20 allows for the collection and utilization of solar energy, and further allows for the efficient utilization of external energy, such as sunlight, while achieving a sunshade effect. The solar collection structure 24 may be, for example, a photovoltaic solar panel, a solar collector, or the like. The photovoltaic solar panel can convert solar energy into electric energy, the solar collector can convert solar energy into heat energy, and the solar collector can be selected according to different requirements.

In some embodiments, as shown in fig. 2, the canopy 22 is a solar energy collecting structure 24, and the solar energy collecting structure 24 can be directly covered on the top of the supporting structure 21 as the canopy 22, for example, the solar energy collecting structure 24 is a photovoltaic solar panel, so that the canopy can replace a color steel plate, and no color steel plate canopy is required to be additionally arranged, so that materials can be saved, and the installation cost can be reduced. In some embodiments, when a solar shade 23 is provided, the solar energy collection structure 24 may also be used as a solar shade 23 around the sides of the support structure 21 to achieve sufficient solar energy collection.

In some embodiments, as shown in fig. 3, the solar collection structure 24 may be provided separately from the canopy 22, e.g., the solar collection structure 24 is provided on the canopy 22. The canopy 22 may provide support for the solar collection structure 24, and the canopy 22 may further achieve a better rain and snow protection.

In some embodiments, the solar collection structure 24 may be a flexible material, such as a flexible photovoltaic solar panel that is bendable. When flexible materials are used, the solar collection structure 24 may be used as the canopy 22 instead of a sun visor, and may be configured to match different shapes of the canopy 22. As shown in fig. 4, when the solar energy collecting structure 24 is made of a flexible material, the solar energy collecting structure 24 may be directly coated on the surface of the storage tank 10, and the sunshade may or may not be provided on the sunshade assembly 20, so that the solar energy collecting structure 24 shields the sunlight on the upper portion of the working medium storage device. This achieves a more complete shielding of the surface of the tank 10 and a certain heat insulation (keeping the temperature of the tank 10 low).

In some embodiments, the footprint of the working substance storage device may be further reduced in conjunction with the placement of the reservoir 10 to achieve a sunshade effect for more reservoirs 10 with a sized sunshade assembly 20.

In other embodiments, if a larger volume reservoir 10 is used, the individual reservoirs 10 may be increased in volume by increasing the height or length or width, but at the same time the individual reservoirs 10 may be oversized and may be significantly more difficult to manufacture, transport and install. Therefore, the working medium storage device in the working medium storage system 100 provided by the embodiment of the invention can solve the problem of large occupied area through the storage tank 10 shown in fig. 5 to 9.

Referring to fig. 5, a tank 10 in one embodiment of the present invention includes a first tank unit 11 and a second tank unit 12. The first storage tank unit 11 is arranged on the ground 40, the second storage tank unit 12 is stacked on the top of the first storage tank unit 11, and the first storage tank unit 11 and the second storage tank unit 12 are both horizontal tanks. Through the setting of stacking of first storage tank unit 11 and second storage tank unit 12 for working medium storage device can realize the make full use of in vertical space, can not increase the size and the weight of single jar body again, convenient transportation and installation.

Specifically, the first tank unit 11 includes, for example, a first tank 111 and a first bracket 112. Referring to fig. 6, the first can 111 has opposite first bottom 1111 and first top 1112. The first bracket 112 is connected to the first bottom 1111 of the first can 111. The second tank 12 unit is stacked on the first top 1112 of the first tank 111.

The first tank 111 is, for example, a stainless steel horizontal tank, and may be composed of a cylindrical or elliptical cylindrical body and end caps disposed at two ends of the axis of the body. The first bottom 1111 and the first top 1112 are opposite sides of the barrel. That is, the first bracket 112 is connected to the outer wall of the cylinder of the first tank 111, and the first bottom 1111 is disposed on one side of the cylinder where the first bracket 112 is disposed, and the first top 1112 is disposed on the opposite side. The first bracket 112 may be a saddle-type support as shown in fig. 6, and the saddle-type plate makes the stress more uniform. Of course, the first support 112 may also be a leg support, and the embodiment is not limited thereto. The number of the first brackets 112 may be two or other numbers, for example, two first brackets 112 are disposed opposite to each other in the axial direction of the cylinder of the first tank 111 (i.e., the length direction of the first tank 111). Nor is it limited in this embodiment.

The second tank unit 12 includes, for example, a second tank 121, and the second tank 121 may have a structure similar to that of the first tank 111. Specifically, referring to fig. 6, the second tank 121 has a second bottom 1211 and a second top 1212, and the second tank 12 is stacked on the first top 1112 with the second bottom 1211 positioned toward the first top 1112.

In using the tank 10 provided in this embodiment, the first tank 111 and the second tank 121 may be placed on the ground (or on another platform or foundation on which the tank 10 may be placed) and supported by the first bracket 112. Thus, when the tank 10 is used, the tank 10 is in a state in which the second tank unit 12 and the first tank unit 11 are stacked up and down, and the effect of reducing the occupied area can be achieved by this stacked up and down arrangement.

In some embodiments, the first tank unit 11 further comprises a second bracket 113 disposed on the first top 1112. The second tank unit 12 further includes a third bracket 122 disposed at a side of the second tank 121 near the first tank 111. I.e., the third bracket 122 is disposed on the second bottom 1211 of the second can 121. The third bracket 122 is opposite to and connected to the second bracket 113. Referring to fig. 6, the second bracket 113 and the third bracket 122 may be configured as saddle brackets similar to the first bracket 112, and are connected stably and uniformly. The number of the third brackets 122 is the same as that of the second brackets 113, and may be two or more. The present embodiment is not limited. When assembling the storage tank 10, the first storage tank 11 with the first bracket 112 and the second bracket 113 can be prepared separately, the second storage tank 12 with the third bracket 122 can be prepared, the first storage tank 11 is placed so that the first bracket 112 supports the first tank body 111, then the second storage tank 12 is stacked on the first storage tank 11 so that the third bracket 122 is aligned with the second bracket 113, and finally the third bracket 122 is fixed with the second bracket 113 by welding or the like, so that a structure that the storage tank 10 is stacked up and down is realized. By providing the second bracket 113 and the third bracket 122, the assembly of the tank 10 is more convenient and the support is more stable.

In some embodiments, the first tank unit 11 and the second tank unit 12 each include a tank body and an insulation layer, and the insulation layer is coated on the surface of the tank body. Referring specifically to fig. 7, the first storage tank 11 unit includes a first tank 111 and a first heat-insulating layer 114, and the first heat-insulating layer 114 is coated on the surface of the first tank 111. The second storage tank unit 12 comprises a second tank body 121 and a second heat insulation layer 123, and the second heat insulation layer 123 is coated on the surface of the second tank body 112.

Because the condensed and liquefied liquid energy storage working medium needs to be preserved at low temperature after compression, the heat preservation layer can also be called a cold preservation layer or a heat insulation layer to isolate external heat or cold energy from being transferred into the tank body, so that the temperature of the liquid working medium or the gas-liquid mixed state working medium in the tank body is increased or reduced, overpressure caused by pressure increase in the tank body due to the increase of the temperature of the working medium stored in the tank body is prevented, or extra heat supplement is required when a physical energy storage system such as a gas-liquid two-phase carbon dioxide energy storage system releases energy due to the reduction of the temperature of the working medium stored in the tank body is prevented. Wherein the insulation (either the first insulation 114 or the second insulation 123) may be a polymer foam, such as polystyrene (EPS) and Polyurethane (PUR). The polymer foam has good heat insulation performance and heat insulation performance, and can be made into heat insulation boards, heat insulation pipes and the like. Or the heat insulating layer can be formed by adopting heat insulating bricks, for example, silicate heat insulating bricks, magnesia heat insulating bricks and the like, and the heat insulating brick has the characteristics of high temperature resistance, corrosion resistance and good heat insulating performance and is suitable for heat insulation of high-temperature equipment. Or the heat-insulating layer can be formed by adopting heat-insulating adhesives such as organic silica gel, thermosetting adhesive and the like, so that the tightness and the tightness of the heat-insulating material can be improved. Or the heat preservation layer can also comprise mineral wool products such as slag wool, gypsum wool and the like, further has fireproof performance, and is suitable for occasions needing flame retardance and high temperature resistance. Or the insulation may also comprise glass wool articles such as glass wool boards, glass wool mats, and the like. Has better heat insulation performance and sound absorption performance. The heat insulating layer may be a combination of multiple materials in the above exemplary materials, for example, a multi-layer material stack, or some materials may be used as gaps between other materials, which is not limited in this embodiment.

When the sunshade assembly 20 is provided as a sunshade, the storage tank 10 provided with the heat insulation layer can be directly arranged in the sunshade to realize the sunshade effect. Or the flexible solar energy collecting structure 24 can be directly coated outside the corresponding heat-insulating layer of the storage tank 10, so as to realize a closer fitting effect, enhance cold insulation and sun protection effects, and realize efficient utilization of external energy sources such as sunlight.

In some embodiments, referring to fig. 8, the first tank unit 11 (first tank 111) has a first cavity for containing the liquid energy storage working medium, and the first tank unit 11 (first tank 111) is provided with a first connection port 1113 communicating with the first cavity.

The second tank unit 12 (second tank 121) has a second chamber for containing the liquid energy storage medium, and a second connection port 1213 communicating with the second chamber is provided on the second tank unit 12 (second tank 121).

The tank 10 further includes a connection hose 13, the connection hose 13 being connected between the first connection port 1113 and the second connection port 1213, the first chamber and the second chamber being communicated with each other through the connection hose 13.

The first cavity of the first tank 111 and the second cavity of the second tank 121 are communicated through the connecting hose 13, so that the first tank 111 and the second tank 121 are equivalent to a liquid storage tank with larger capacity, the first storage tank unit 11 and the second storage tank unit 12 can be manufactured and transported respectively and independently, the first storage tank unit 11 and the second storage tank unit 12 are stacked and fixed, and then the connecting hose 13 is connected, so that the large-volume liquid storage tank is realized and simultaneously the manufacturing, the transportation and the installation of the large-volume liquid storage tank with the same volume are more convenient. The connection hose 13 is a flexible pipe, so that it is possible to prevent the difficulty in installation caused by the fact that the positions of the first connection port 1113 and the second connection port 1213 cannot be completely aligned due to manufacturing errors and installation errors, and to reduce the difficulty in installation.

In some embodiments, the first connection port 1113 is provided at the first top 1112 (top of the first tank unit 11), and the second connection port 1213 is provided at the second bottom 1211 (bottom of the second tank unit 12) and is provided opposite to the first connection port 1113. The first connection port 1113 and the second connection port 1213 are aligned, so that the length required by the connection hose 13 is smaller, the installation difficulty is small, the communication effect of the first cavity and the second cavity is better, and interference with other pipelines outside the storage tank 10 is not easy to occur.

Further, the number of tanks stacked one above the other in the tank 10 is not limited in this embodiment, and for example, referring to fig. 9, the tank 10 may further include a third tank unit 14, where the third tank unit 14 is stacked on the second top 1212 of the second tank unit 12. The second tank unit 12 is further provided with a third connection port, for example, and the third tank 14 is further provided with a fourth connection port, and the third connection port and the fourth connection port are communicated with each other through a hose. Thus, a structure that the multi-layer storage tank units are stacked up and down and communicated can be realized. A fourth bracket may also be provided on the second top 1212 of the second tank unit 12, and a fifth bracket may be provided on a side of the third tank unit 14 adjacent to the second tank unit 12, the fifth bracket being disposed opposite to and interconnected with the fourth bracket. The fourth bracket and the fifth bracket can also be saddle-shaped brackets, and the number of the fourth bracket and the fifth bracket is the same.

Similarly, when the third tank 14 is further included in the tank 10, a third connection port may be provided on the second top 1212 (the top of the second tank unit 12), and a fourth connection port may be provided on a side of the third tank 14 toward the second tank 121 (the bottom of the third tank unit 14), the fourth connection port being provided opposite to the third connection port.

In some embodiments, reservoir 10 further includes a working fluid inlet 1114 and a working fluid outlet 1115 (see fig. 5), where working fluid enters the first and second chambers from working fluid inlet 1114 when stored in reservoir 10. When the working medium stored in the storage tank 10 is required to be used, the working medium in the first cavity and the second cavity flows out from the working medium outlet 1115. In some embodiments, when using the storage tank 10, only the working medium is stored in the storage tank 10 or only the working medium is output from the storage tank 10 at the same time, so that the working medium inlet 1114 and the working medium outlet 1115 do not need to be used simultaneously, and therefore the working medium inlet 1114 and the working medium outlet 1115 can be shared, that is, only one of the working medium inlet 1114 and the working medium outlet 1115 can be set, and the switching between the inlet function and the outlet function can be realized outside the storage tank 10 through the branch pipe and the switching valve. Of course, the working fluid inlet 1114 and the working fluid outlet 1115 may be independently provided. The first cavity of the first tank 111 is communicated with the second cavity of the second tank 121 by the connecting hose 13, and compared with the situation that the first cavity of the first tank 111 is not communicated with the second cavity of the second tank 121, the working medium inlet 1114 and the working medium outlet 1115 are reduced, and the working medium inlet branch pipe and the working medium outlet branch pipe outside the tank body are also reduced.

In some embodiments, working substance inlet 1114 may be disposed on second canister 121 or on first canister 111, and in particular may be disposed proximate first bottom 1111. If the working fluid inlet 1114 is provided in the second tank 121, when the working fluid is stored in the storage tank 10, the working fluid first enters the second chamber through the working fluid inlet 1114 and flows into the first chamber through the connection hose 13. If the working medium inlet 1114 is provided on the first tank 111, when the working medium is stored in the storage tank 10, the working medium firstly enters the first cavity through the working medium inlet 1114, and then enters the second cavity from the connecting hose 13 after the first cavity is filled. The working fluid outlet 1115 may be disposed on the first tank 111 and near the first bottom 1111 to prevent the problem of the low liquid level working fluid in the storage tank 10 from being able to flow out.

Further, fig. 10 to 15 show a working medium storage system 100 employing the above-described tanks 10 stacked one above another with the first tank unit 11 and the second tank unit 12. Wherein the tank 10 is disposed on the ground 40 with the first bottom 1111 facing the ground, the entirety of the tank 10 is supported by the first bracket 112.

In some embodiments, the number of reservoirs 10 included in the working medium storage device in working medium storage system 100 may be more than one. For example, 4 reservoirs 10 are included in working substance storage system 100 shown in fig. 10, although the number of reservoirs 10 may be 3, 5, or other numbers in other embodiments. The one or more tanks 10 are arranged side by side on the ground 40, and the one or more tanks 10 may or may not be connected to each other in series, parallel or series-parallel.

For example, when the plurality of storage tanks 10 are connected in series, the plurality of storage tanks 10 connected in series are combined into one large-volume storage tank, the plurality of storage tanks 10 can be manufactured, transported and installed respectively, the large-volume storage tank is realized, meanwhile, the modular design is realized, and the transportation and the installation are more convenient. When a plurality of storage tanks 10 are connected in parallel, a valve can be arranged in a parallel pipeline to realize the switching use of the storage tanks 10 connected in parallel, for example, when one storage tank 10 needs maintenance and should be stopped, the storage tank 10 needing maintenance can be isolated by closing the valve, and other storage tanks 10 connected in parallel with the storage tank 10 needing maintenance keep normal operation. When a plurality of storage tanks 10 are connected in series and parallel, several storage tanks 10 connected in series can form a storage device group with larger volume, different storage device groups can be connected in parallel, and different storage device groups can be switched according to actual operation conditions, for example, when a storage tank 10 in a certain storage device group needs maintenance, other storage device groups connected in parallel with the storage device group corresponding to the storage tank 10 needing maintenance can be selected for normal use. The above-described different storage effects can be achieved by providing different connection modes of the storage tank 10 in the working medium storage device.

In some embodiments, referring to fig. 11, working substance storage system 100 further includes a support base 30, support base 30 being disposed on ground 40, tank 10 being disposed on support base 30 with first bracket 112 supported on support base 30. The support base 30 is, for example, a concrete structure, and the support base 30 is raised above the ground 40. The leveling effect can be achieved by the support foundation 30 through the storage tank 10 being arranged on the ground 40 through the support foundation 30, and the fixation of the storage tank 10 is facilitated. The number of the support foundations 30 may be set according to the number of the first brackets 112 of the storage tank 10, for example, one storage tank 10 has two first brackets 122, and the support foundations 30 are set as two concrete struts corresponding to the two first brackets 122, respectively. The width of each concrete strut is, for example, greater than the width of the bottom of the corresponding first bracket 122, where the bottom of the first bracket 122 refers to the surface of the first bracket 122 facing away from the first tank 111, and when the storage tank 10 is supported by the support base 30, the bottom of the first bracket 112 contacts the support base 30, and setting the support base 30 wider than the width of the bottom of the first bracket 112 allows fine adjustment of the position of the storage tank 10 to achieve a stable support. When the working fluid storage device includes a plurality of storage tanks 10 arranged therein, the support base 30 may extend along the arrangement direction of the plurality of storage tanks 10, and in combination with fig. 11 and 12, only two elongated concrete struts need to be provided for the corresponding 4 storage tanks 10 in some embodiments.

As shown in fig. 16, an embodiment of the present invention also provides a physical energy storage system comprising the aforementioned storage tank 10 or the aforementioned working fluid storage system 100. Specifically, the physical energy storage system further comprises an air storage 200, an energy storage assembly 300 and an energy release assembly 400, and the air storage 200, the energy storage assembly 300, the working medium storage system 100 (or the storage tank 10) and the energy release assembly 400 are sequentially connected in a closed loop mode. The gas storage 200 is used for storing working medium gas, and gaseous working medium flowing out of the gas storage 200 is compressed and condensed into liquid state by the energy storage component 30 in the process of storing energy by the physical energy storage system and flows into the working medium storage system 100 (or the storage tank 10) to finish energy storage, and liquid energy storage working medium (compressed and condensed energy storage working medium) flowing out of the working medium storage system 100 (or the storage tank 10) is heated to gaseous state by the energy release component 400 and expanded to release energy (such as power generation) and then flows into the gas storage 200 to release the energy stored in the process of storing energy. The specific structure of the gas storage 200, the energy storage component 300, and the energy release component 400 in the physical energy storage system may be understood by referring to the gas storage, the energy storage component, and the energy release component in the carbon dioxide energy storage device/system disclosed in the chinese patent publication nos. CN112985143B, CN112985144B, CN112985145B and CN114109549B, which, of course, are not limited thereto. Furthermore, the disclosures of CN112985143B, CN112985144B, CN112985145B and CN114109549B are incorporated herein in their entirety by reference into the specification of the present application. The physical energy storage system provided in this embodiment adopts the foregoing storage tank 10, which can save the occupied area, is convenient to transport and install, and also can shield sunlight by adopting the foregoing working medium storage system 100, so as to prevent the temperature of the working medium storage device from rising due to solar radiation.

Referring to fig. 17, some embodiments of the present invention provide a physical energy storage system further comprising a heat exchange medium storage structure 50. The heat exchange medium storage structure 50 is for storing heat exchange medium. The heat exchange medium can be molten salt, saturated water or heat conducting oil. The solar collection structure 24 is connected to a heat exchange medium storage structure 50.

In some embodiments, the solar collection structure 24 is configured to convert solar energy into thermal energy, which the heat exchange medium may absorb and warm. For example, the solar collection structure 24 is a solar collector, and the heat exchange medium storage structure 50 may be in communication with the solar collection structure 24, for example, through a medium transfer conduit.

In some embodiments, for example, the heat exchange medium in the heat exchange medium storage structure 50 may be transferred to the solar energy collection structure 24 through a medium transfer pipeline, and the heat energy converted by the solar energy collection structure 24 is output from the solar energy collection structure 24 to a device requiring a heat source, for example, to a heat exchanger or the like after the heat exchange medium is warmed. Other devices may be provided with a heat source.

Alternatively, the solar energy collecting structure 24 may heat the heat exchange medium, the heated heat exchange medium is transferred to the heat exchange medium storage structure 50 through the medium transfer pipeline, and the heat exchange medium storage structure 50 stores the heated high-temperature heat exchange medium.

Or, the heat exchange medium storage structure 50 may be connected to the solar energy collection structure 24 in two directions, and when the temperature of the heat exchange medium stored in the heat exchange medium storage structure 50 decreases, the heat exchange medium may be transported to the solar energy collection structure 24 to heat, and the heated heat exchange medium is transported to the heat exchange medium storage structure 50 for storage.

Alternatively, in some embodiments, the solar energy collection structure 24 converts solar energy to electrical energy, for example, referring to fig. 18, the physical energy storage system further includes an electrical heating assembly 60, the electrical heating assembly 60 being connected to the thermal storage assembly and electrically connected to the solar energy collection structure 24. The electrical heating assembly 24 is used to heat up the heat exchange medium using electrical energy from the solar energy collection structure 24. The electric heating assembly 24 may be disposed inside the heat exchange medium storage structure 50, for example, and may directly heat the heat exchange medium stored in the heat exchange medium storage structure 50.

For example, the heat exchange medium storage structure 50 includes a heat storage tank 51, the heat storage tank 51 being, for example, in closed loop connection with the energy release assembly 400. The energy release assembly 400 includes, for example, an energy release heat exchanger, and the heat storage tank 51 stores a heat exchange medium with a higher temperature, so as to transfer heat to the energy storage working medium through the energy release heat exchanger in the energy release process of the physical energy storage system, and the compressed and condensed liquid energy storage working medium stored in the working medium storage device is subjected to heat absorption expansion to do work or generate electricity after passing through the energy release assembly 400, so that energy release is completed. The temperature rise of the heat exchange medium by the solar collection structure 24 ensures that the temperature within the heat storage tank 51 is maintained at a higher temperature to provide a sufficient heat source for the energy release process.

For example, the heat exchange medium storage structure 50 includes a cold storage tank 52, where the cold storage tank 52 is connected with the energy storage assembly 300 in a closed loop, the energy storage assembly 300 includes an energy storage heat exchanger, for example, the lower temperature heat exchange medium is stored in the energy storage Leng Guan, so as to absorb heat of the energy storage working medium through the energy storage heat exchanger during the energy storage process of the physical energy storage system, and the gaseous energy storage working medium stored in the air storage is compressed and condensed by the energy storage assembly 300, so as to accomplish the energy storage. The heat exchange medium with a lower temperature in the cold storage tank 52 is heated to a heat exchange medium with a higher temperature (for example, a first high temperature) after passing through the energy storage heat exchanger, and can be directly conveyed to the heat storage tank 51 for storage for energy release process. Alternatively, the heat exchange medium warmed by the energy storage heat exchanger (i.e., the first high temperature heat exchange medium) may be further warmed to a higher temperature (e.g., a second high temperature, which is greater than the first high temperature) by the solar energy collection structure 24 to meet the temperature requirement of the heat exchange medium required in the energy release process.

In some embodiments, temperature sensing units may be provided at corresponding locations of the physical energy storage system to monitor the temperature of the heat exchange medium at the corresponding locations in real time, in combination with the temperature requirements required for operation to control the start and stop of the solar collection structure 24. For example, when the temperature of the heat exchange medium is below a preset temperature, the solar collection structure 24 is controlled to start heating the heat exchange medium or to provide electric power to the electric heating assembly 60 to heat the heat exchange medium. The solar energy collection structure 24 is controlled to stop heating the heat exchange medium or to stop providing electrical energy to the electrical heating assembly 60 when the temperature of the heat exchange medium reaches a preset temperature. The temperature sensing unit may be disposed in the heat storage tank 51, on a medium transfer pipe, or in the solar collection structure 24, but the embodiment is not limited thereto.

In the foregoing embodiments, the solar energy collecting structure 24 may be a solar collector that can convert solar energy into thermal energy or a photovoltaic solar panel that can convert solar energy into electrical energy, which may be selected according to different design requirements.

The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.

Claims (10)

1. A working fluid storage system, comprising:

the working medium storage device is arranged on the ground; the working medium storage device comprises at least one storage tank, wherein the at least one storage tank is used for storing liquid energy storage working medium;

and the sunshade component shields the sunlight on the upper part of the working medium storage device.

2. The working substance storage system of claim 1, wherein the sunshade assembly is configured as a sunshade comprising a support structure and a canopy cover covering a top of the support structure; the support structure is arranged on the periphery of the working medium storage device, and the top of the support structure is higher than the top of the working medium storage device.

3. The working fluid storage system of claim 2 wherein said sunshade assembly comprises a solar collection structure for collecting and converting solar energy,

the solar energy collecting structure is arranged on the shed cover; or alternatively

The canopy is the solar collection structure.

4. A working fluid storage system as claimed in claim 3, wherein the solar energy collection structure is a solar collector or a photovoltaic solar panel.

5. The working fluid storage system of claim 1 wherein said reservoir comprises:

a first tank unit disposed on the ground;

a second tank unit stacked on top of the first tank unit;

the first storage tank unit and the second storage tank unit are horizontal tank bodies.

6. The working medium storage system of claim 5, wherein the first storage tank unit and the second storage tank unit each comprise a tank body and a heat preservation layer, and the heat preservation layer is coated on the surface of the tank body.

7. The working fluid storage system of claim 5 wherein said first reservoir unit has a first chamber for containing said liquid stored energy working fluid, said first reservoir unit having a first connection port disposed thereon in communication with said first chamber;

the second storage tank unit is provided with a second cavity for containing the liquid energy storage working medium, and a second connection port communicated with the second cavity is arranged on the second storage tank unit;

the storage tank further comprises a connecting hose connected between the first connecting port and the second connecting port, and the first cavity and the second cavity are mutually communicated through the connecting hose.

8. The working fluid storage system of claim 7, wherein the first connection port is provided at a top of the first reservoir unit, and the second connection port is provided at a bottom of the second reservoir unit and is provided opposite to the first connection port.

9. A physical energy storage system, which is characterized by comprising the working medium storage system according to any one of claims 1-8, and further comprising an air storage, an energy storage component and an energy release component, wherein the air storage, the energy storage component, the working medium storage system and the energy release component are sequentially connected in a closed loop.

10. The physical energy storage system of claim 9, further comprising a heat exchange medium storage structure; the heat exchange medium storage structure is used for storing heat exchange medium; the sunshade assembly comprises a solar energy collecting structure which is connected with the heat exchange medium storage structure;

the solar energy collecting structure is used for converting solar energy into heat energy, and the heat exchange medium can absorb the heat energy and heat; or,

the solar energy collection structure is used for converting solar energy into electric energy, the physical energy storage system further comprises an electric heating component, the electric heating component is connected with the heat exchange medium storage structure and is electrically connected with the solar energy collection structure, and the electric heating component is used for heating up the heat exchange medium by utilizing the electric energy output by the solar energy collection structure.