Stable and energy-saving gas storage system and physical energy storage system

Abstract

The embodiment of the invention relates to a stable and energy-saving gas storage system which comprises an inner film and an outer film covering the outer side of the inner film, a containing cavity is formed in the inner side of the inner film and used for storing gas, an interlayer cavity is formed between the inner film and the outer film, and the interlayer cavity is used for storing gas. The interlayer cavity is configured to be in a non-closed state when the outer film is upwards supported, and the outer film is an infrared barrier film. The embodiment of the invention further provides a physical energy storage system adopting the gas storage system. According to the embodiment of the invention, the infrared barrier film is adopted as the outer film, so that the solar radiation can be reflected and blocked in time when the solar radiation is enhanced, and the effects of maintaining the stable air pressure in the interlayer cavity, the stable working frequency of the air supply device group and the stable number of the air supply devices are achieved; therefore, the air supply device group can maintain the relative stability of the pressure difference between the interlayer cavity and the outside without consuming or excessively consuming extra energy, so that the effects of saving energy and improving the electricity-electricity conversion efficiency of the physical energy storage system are achieved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a stable and energy-saving gas storage system and a physical energy storage system. Background Art

[0002] Energy storage technology is divided into chemical energy storage and physical energy storage. In the field of physical energy storage, during the use of the gas storage reservoir in the gas-liquid two-phase carbon dioxide energy storage system, it is particularly important to control the pressure within a safe range for the stability of the operation of the gas-liquid two-phase carbon dioxide energy storage system.

[0003] The inventors discovered that when solar radiation increases during the day, on the one hand, the air supply fan needs to increase its frequency and / or invest in more units to increase the air supply volume in order to keep the air pressure difference stable, which will lead to an increase in the energy consumption of the air supply fan, and correspondingly increase the factory electricity consumption of the gas-liquid two-phase carbon dioxide energy storage system, and reduce the electricity-to-electricity conversion efficiency; on the other hand, the air pressure difference between the containment cavity and the interlayer cavity increases significantly. When this air pressure difference exceeds the safety value, it will cause the containment cavity to explode, causing a safety accident.

[0004] The information disclosed in this background section is only intended to enhance understanding of the overall background of the invention and should not be taken as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] In order to solve at least one of the above technical problems, an embodiment of the present invention provides a stable and energy-saving gas storage system and a physical energy storage system to effectively avoid additional increase in energy consumption, thereby improving the electric-to-electric conversion efficiency of the physical energy storage system; at the same time, it prevents solar radiation heat from being further transferred to the containing cavity to ensure the safety of the containing cavity.

[0006] Specifically, an embodiment of the present invention provides a stable and energy-saving gas storage system, comprising an inner membrane and an outer membrane covering the outer side of the inner membrane, a containing cavity being formed on the inner side of the inner membrane, the containing cavity being used to store gas, an interlayer cavity being formed between the inner membrane and the outer membrane, the interlayer cavity being configured to be in a non-closed state when the outer membrane is propped up, and the outer membrane is an infrared blocking film.

[0007] In one embodiment of the present invention, the reflectivity of the infrared blocking film to near-infrared light with a wavelength of 780nm-2125nm is greater than 70%.

[0008] In one embodiment of the present invention, the infrared blocking film is a multi-layer stacked structure, including: a base layer, a first planarization layer, a second planarization layer, an adhesive layer and an infrared blocking layer, the first planarization layer is located on the outside of the base layer, the second planarization layer is located on the inside of the base layer, and the infrared blocking layer is bonded to the side of the first planarization layer away from the base layer through the adhesive layer.

[0009] In one embodiment of the present invention, the base layer is a mesh layer, the infrared blocking layer includes an infrared reflective material, and the infrared reflective material is one of titanium dioxide, cesium tungstate, indium tin oxide, sodium zinc phosphate and bismuth molybdate, or any combination thereof.

[0010] In one embodiment of the present invention, the infrared blocking layer has a thickness ranging from 20 μm to 50 μm.

[0011] In one embodiment of the present invention, the air storage system further comprises an air supply device group, wherein the air supply device group is connected to the interlayer cavity and is used to supply air to the interlayer cavity so that the outer membrane is propped up upward.

[0012] In one embodiment of the present invention, the air supply device group includes one or more air supply devices, and is used to supply air to the interlayer cavity so that the pressure difference between the gas pressure in the interlayer cavity and the external atmospheric pressure is maintained at 50Pa-800Pa.

[0013] In one embodiment of the present invention, the gas storage system further comprises an exhaust device group, wherein the exhaust device group comprises one or more exhaust devices connected to the interlayer cavity and used for exhausting the interlayer cavity.

[0014] On the other hand, an embodiment of the present invention provides a physical energy storage system, comprising the gas storage system, energy storage component, energy storage container and energy release component described in any of the preceding embodiments, wherein the gas storage system, the energy storage component, the energy storage container and the energy release component are connected in a closed loop in sequence.

[0015] In one embodiment of the present invention, the physical energy storage system is a gas-liquid two-phase carbon dioxide energy storage system, and the containing cavity is used to store gaseous carbon dioxide as an energy storage working fluid.

[0016] The embodiment of the present invention can have at least one of the following beneficial effects: the embodiment of the present invention can timely reflect and block solar radiation when solar radiation is enhanced by using an infrared blocking film for the outer film, so that the air pressure of the interlayer cavity will not be reduced due to the enhanced solar radiation, and the pressure difference of the interlayer cavity relative to the outside will not be reduced, thereby maintaining the stability of the air pressure in the interlayer cavity and the stability of the working frequency and number of the air supply device group. When solar radiation is enhanced, the air supply device group does not need to consume or consume too much additional energy to maintain the relative stability of the pressure difference between the interlayer cavity and the outside, thereby saving energy and improving the electric-electric conversion efficiency of the physical energy storage system. When solar radiation is enhanced, the outer film uses an infrared blocking film to timely reflect and block solar radiation, and a very small part of the solar radiation heat is transferred to the containing cavity, which will not cause the temperature of the gas stored in the containing cavity to rise due to the influence of the solar radiation heat, and will not cause the air pressure of the gas stored in the containing cavity to rise accordingly, resulting in a significant increase in the pressure difference between the containing cavity and the interlayer cavity, causing a safety accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below; obviously, the accompanying drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a stable and energy-saving gas storage system according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 A partial structural cross-sectional view of the gas storage system shown.

[0020] Figure 3 The figure is a schematic diagram of the reflectivity-wavelength relationship of an infrared blocking film according to an embodiment of the present invention.

[0021] Figure 4 for Figure 1 A partial schematic diagram of a cross-sectional structure of the outer membrane shown.

[0022] Figure 5 A schematic diagram of the structure of a physical energy storage system according to an embodiment of the present invention.

[0023] Description of the main component symbols in the accompanying drawings:

[0024] 11-stable and energy-saving gas storage system, 1111-outer film, 1113-inner film, 1110-sandwich cavity, 1112-containing cavity, 1130-air supply device, 1150-exhaust device, 1115-ground film, 11110-base layer, 11112-first flattening layer, 11114-adhesive layer, 11116-infrared blocking layer, 11113-second flattening layer, 10-physical energy storage system, 13-energy storage component, 15-energy storage container, 17-energy release component. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and technical effect of the embodiment of the present invention clearer, the technical scheme in the embodiment of the present invention is clearly and completely described in combination with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention. Based on the embodiment disclosed in the present invention, other embodiments obtained by ordinary technicians in this field without making creative work should belong to the scope of protection of the present invention.

[0026] See also Figure 1 and Figure 2 A stable and energy-saving gas storage system 11 provided by an embodiment of the present invention includes: an inner film 1113 and an outer film 1111 covered on the outside of the inner film 1113, a containing cavity 1112 is formed on the inner side of the inner film 1113, the containing cavity 1112 is used to store gas, an interlayer cavity 1110 is formed between the inner film 1113 and the outer film 1111, the interlayer cavity 1110 is configured so that the outer film is in a non-closed state when it is propped up, and the outer film 1111 is an infrared blocking film.

[0027] The inventors have found through research that when solar radiation increases during the day, the pressure difference between the interlayer cavity and the outside world becomes smaller, and the air supply fan needs to increase its frequency and / or invest more units to increase the air supply volume to keep the pressure difference stable.

[0028] The embodiment of the present invention adopts an infrared blocking film through the outer film 1111, which can reflect and block solar radiation in time when solar radiation is enhanced, so that the air pressure in the interlayer cavity will not decrease due to the enhanced solar radiation, and the air pressure difference between the interlayer cavity and the outside world will not decrease, thereby maintaining the air pressure in the interlayer cavity 1110 stable, and there is no need to increase the air supply consumption or consume too much additional energy to maintain a relatively stable pressure difference between the interlayer cavity 1110 and the outside world, thereby saving energy and improving the electric-electric conversion efficiency of the energy storage system.

[0029] Since it is necessary to add gas into the interlayer cavity 1110 or discharge gas from the interlayer cavity 1110 to maintain the pressure difference between the gas pressure in the interlayer cavity 1110 of the gas storage system 11 and the external atmospheric pressure within a certain range, it can be understood that the interlayer cavity 1110 is connected to the atmosphere, and the interlayer cavity 1110 is not a closed space. In an open environment, the temperature rises, the density decreases, and the air pressure decreases. In order to maintain a stable air pressure difference between the interlayer cavity 1110 and the outside world, it is necessary to increase the air supply volume, thereby consuming more electricity. If the original air supply volume is maintained or the air supply volume is not increased in time, the pressure difference between the interlayer cavity 1110 and the outside world decreases, causing the outer film to collapse slightly and unable to maintain the original shape, and unable to resist strong winds and heavy snow; the pressure reduction of the interlayer cavity 1110 causes the pressure difference between the containing cavity and the interlayer cavity to increase. Once it exceeds the safety value of the inner film, the inner film may be torn, causing the containing cavity to burst and causing a safety accident.

[0030] In some embodiments, Figure 3 As shown, the reflectivity of the infrared blocking film to near-infrared light with a wavelength of 780nm-2125nm (i.e., 0.78μm-2.125μm) is greater than 70%, so as to achieve a good isolation effect on most infrared spectra. As is known to all, the main wavelength range of solar radiation includes infrared rays, and the main characteristic of infrared rays is thermal effect, which will generate heat energy after being absorbed by an object; the inventors have found that by setting the reflectivity of the infrared blocking film to near-infrared light to be greater than 70%, it can effectively inhibit the transfer of solar radiation heat to the inside of the gas storage system 11, and the air pressure of the interlayer cavity will not decrease due to the enhancement of solar radiation, and then the air pressure difference of the interlayer cavity relative to the outside will not decrease, thereby playing a role in maintaining the stability of the air pressure in the interlayer cavity 1110 and the stability of the working frequency and number of air supply devices in the air supply device group.

[0031] In some embodiments, Figure 4 As shown, the infrared blocking film is a multi-layer stacked structure, including: a base layer 11110, a first planarization layer 11112, a second planarization layer 11113, a bonding layer 11114, and an infrared blocking layer 11116. The first planarization layer 11112 is located on the outside of the base layer 11110, the second planarization layer 11113 is located on the inside of the base layer 11110, and the infrared blocking layer 11116 is bonded to the side of the first planarization layer 11112 away from the base layer 11110 through the bonding layer 11114.

[0032] More specifically, as an example, the base layer 11110 is a mesh layer, the first planarization layer 11112 and the second planarization layer 11113 are polyvinyl chloride (PVC) adhesive layers, the bonding layer 11114 is a glue layer, the glue of the glue layer is, for example, a polyester resin and ethyl acetate mixed glue, and the thickness of the glue layer is 5 to 10 microns. The infrared blocking layer 11116 includes an infrared reflective material, and the infrared reflective material is, for example, one of titanium dioxide, cesium tungstate, indium tin oxide, sodium zinc phosphate and bismuth molybdate or any combination thereof (for example, any combination of two or more), and of course, it can also be other infrared reflective materials. In this way, the infrared blocking film withstands the tensile force with the high strength of the mesh layer, and the PVC adhesive layer is evenly applied on the inner and outer sides of the mesh layer to evenly cover the mesh fibers on the inner and outer sides of the mesh layer to form a flat surface; the outer side of the PVC adhesive layer is evenly coated with glue to form a glue layer as the bonding layer 11114, and the outer side of the glue layer is the infrared blocking layer 11116. One function of the infrared blocking layer 11116 is to reflect infrared rays and block infrared transmission; another function is to form a dense protective film on the surface, which can prevent scratches and dirt from adhering to the surface, so that the film material has self-cleaning and anti-aging effects, and prolongs the service life of the film material. In some embodiments, the infrared blocking layer 11116 also includes polyvinylidene fluoride (PVDF) material, and PVDF mainly plays a self-cleaning role, so that the infrared blocking layer 11116 has a better self-cleaning effect.

[0033] In some embodiments, the infrared blocking layer 11116 has a thickness ranging from 20 μm to 50 μm. The thicker the infrared blocking layer 11116 is, the better the reflection effect is, but the cost is too high; on the contrary, the infrared blocking layer 11116 is too thin and is prone to cracking.

[0034] In some embodiments, Figure 1 As shown, the air storage system 11 further includes an air supply device group, which is connected to the interlayer cavity 1110 and is used to supply air to the interlayer cavity 1110 so that the outer membrane 1111 is propped up.

[0035] In some embodiments, the air supply device group includes one or more ( Figure 1The air supply device 1130 is used to supply air to the interlayer cavity 1110 between the outer film 1111 and the inner film 1113 so that the pressure difference between the gas pressure in the interlayer cavity 1110 and the external atmospheric pressure is maintained within a certain range, such as 50Pa-800Pa. The pressure difference range here can be calculated based on the strength of the outer film material and the meteorological conditions of the region. The lower limit is to ensure that the outer film 1111 is propped up and maintains its shape under the conditions of strong winds and heavy snow, and the upper limit is the safety value of the outer film material; if it is lower than the lower limit, the outer film 1111 will be deformed or even torn when strong winds come, and the outer film 1111 will be crushed when heavy snow comes. If it is higher than the upper limit, the outer film material will be damaged and the outer film material will be torn because it cannot withstand the tension. As an example, the air supply device 1130 can use an air supply fan, such as a blower.

[0036] Based on the above, the gas in the interlayer cavity 1110 is used to prop up the outer membrane 1111 to maintain its shape, so that the gas storage system 11 is not easy to collapse. By replenishing gas into the interlayer cavity 1110 or discharging gas from the interlayer cavity 1110, the pressure difference between the gas pressure in the interlayer cavity 1110 and the external atmospheric pressure can be maintained within a certain range, thereby meeting the ability of the outer membrane to resist wind and snow.

[0037] In some embodiments, Figure 1 As shown, the gas storage system 11 further includes an exhaust device group, which includes one or more exhaust devices 1150 connected to the interlayer cavity 1110 and used to exhaust the interlayer cavity 1110 . Figure 1 The exhaust device group includes three (for example only) exhaust devices 1150, and the exhaust device group can realize the exhaust of gas from the sandwich cavity 1110. For example, the exhaust device 1150 can be an exhaust valve.

[0038] Please see again Figure 1 and Figure 2, a receiving cavity 1112 is formed on the inner side of the inner membrane 1113 of the gas storage system 11, which is used to store gaseous energy storage medium. The receiving cavity 1112 is a closed space. The inner membrane 1113 is, for example, a flexible gas membrane made of a polymer material. In order to reduce the leakage of the gaseous energy storage medium stored in the receiving cavity 1112 into the interlayer cavity through the inner membrane 1113, further, the inner membrane 1113 includes a metal layer to reduce the leakage rate of the gaseous energy storage medium. The inner membrane 1113 can be an integrally formed membrane, and the inner membrane 1113 has a closed inner cavity, and the closed inner cavity is the receiving cavity 1112. When the inner membrane 1113 is installed, the integrally formed membrane is laid flat and fixed to the ground 1115. The inner membrane 1113 can be a detachable upper inner membrane and a ground membrane, and the upper inner membrane and the ground membrane are sealed and connected to jointly enclose the receiving cavity 1112, and the ground membrane is laid flat and fixed to the ground 1115. The inner membrane 1113 may be only an upper inner membrane, which is sealed and connected to the ground 1115, and the upper inner membrane and the ground 1115 together enclose a containing cavity 1112. After the containing cavity 1112 stores a gaseous energy storage medium such as gaseous carbon dioxide, the temperature change of the carbon dioxide in the containing cavity 1112 is maintained within the required range, such as -40°C-70°C, preferably 20°C-30°C. The containing cavity 1112 can maintain the internal carbon dioxide pressure within a small range of fluctuations through volume changes, so the carbon dioxide pressure in the containing cavity 1112 can be approximately regarded as a constant value. Usually, the gas pressure in the containing cavity 1112 is higher than the gas pressure in the interlayer cavity 1110. The ground may be a flat ground or a ground containing a recessed portion, which may be cast by concrete; wherein the recessed portion of the ground is concave relative to the inner membrane 1113, which can further increase the volume of the containing cavity 1112, thereby increasing the gas storage capacity. The air pressure difference between the containing cavity 1112 and the interlayer cavity 1110 needs to be controlled below an upper limit, and the upper limit value can be calculated based on the strength of the inner membrane material. If it is higher than the upper limit, the inner membrane will be damaged and the inner membrane material will be torn due to the inability to withstand the tension.

[0039] During the operation of the gas storage system 11, the interlayer cavity 1110 is filled with gas such as air, and the interlayer cavity 1110 is at a positive pressure relative to the outside atmosphere, which is maintained at a certain value. When the density of the gas in the interlayer cavity 1110 changes, the air pressure in the interlayer cavity 1110 will change. For example, when solar radiation gradually increases, the gas in the interlayer cavity 1110 is affected by the solar radiation, the temperature of the gas in the interlayer cavity 1110 will increase, the density of the gas in the interlayer cavity 1110 will decrease, and the air pressure in the interlayer cavity 1110 will decrease. Since the pressure difference between the gas pressure in the interlayer cavity 1110 of the gas storage system 11 and the external atmospheric pressure needs to be maintained within a certain range by replenishing or discharging gas from the interlayer cavity 1110, it can be understood that the interlayer cavity 1110 is connected to the atmosphere, and the interlayer cavity 1110 is not a closed space. In an open environment, the temperature rises, the density decreases, and the air pressure decreases. In order to maintain a stable air pressure difference between the interlayer cavity 1110 and the outside world, it is necessary to increase the air supply volume, thereby consuming more electric energy. In addition, if the original air supply volume is maintained or the air supply volume is not increased in time, the air pressure in the interlayer cavity decreases, causing the air pressure difference between the containment cavity and the interlayer cavity to increase. Once it exceeds the safety value of the inner membrane, the inner membrane may be torn, causing the containment cavity to burst and cause a safety accident.

[0040] At the same time, affected by solar radiation, a portion of the heat will be transferred to the accommodating cavity 1112, causing the temperature of the gaseous energy storage medium stored in the accommodating cavity 1112 to rise. Since the accommodating cavity 1112 stores the gaseous energy storage medium and is a closed space, the volume of the accommodating cavity 1112 is variable when it is not filled with the gaseous energy storage medium, and the volume of the accommodating cavity 1112 is unchanged when it is filled with the gaseous energy storage medium. The effect of the increase in the temperature of the gaseous energy storage medium stored in the accommodating cavity 1112 on the gas pressure of the accommodating cavity 1112 is described as follows:

[0041] Since the volume of the containment cavity 1112 is variable when it is not filled with gaseous energy storage medium, the temperature of the gaseous energy storage medium increases, the density decreases, and the volume expands (the volume of the containment cavity 1112 expands as the volume of the gaseous energy storage medium expands), the air pressure inside the containment cavity 1112 remains unchanged until it expands to the maximum volume. In a closed environment (the volume remains unchanged), the higher the gas temperature, the higher the air pressure. As the temperature of the gaseous energy storage medium continues to rise, the air pressure inside the containment cavity 1112 will gradually increase. Under the dual effects of the lowering of the air pressure in the interlayer cavity and the increasing of the air pressure in the containment cavity, the air pressure difference between the containment cavity and the interlayer cavity will become greater. Once it exceeds the safety value of the inner membrane, the inner membrane may tear, causing the containment cavity to burst and trigger a safety accident.

[0042] When the containing cavity 1112 is filled with gaseous energy storage medium, its volume remains unchanged. In a closed environment (volume remains unchanged), the higher the gas temperature, the higher the gas pressure. Therefore, the air pressure inside the containing cavity 1112 will increase. Under the dual effects of the lowering of the air pressure in the interlayer cavity and the increasing of the air pressure in the containing cavity, the air pressure difference between the containing cavity and the interlayer cavity will become larger. Once it exceeds the safety value of the inner membrane, the inner membrane may tear, causing the containing cavity to burst and triggering a safety accident.

[0043] Therefore, the gas storage system 11 of the embodiment of the present invention adopts an infrared blocking film through the outer film 1111 to replace the ordinary outer film in the prior art, so as to reduce the solar radiation heat entering the interlayer cavity 1110, thereby avoiding the temperature increase in the interlayer cavity 1110 to a certain extent, thereby causing the gas density in the interlayer cavity 1110 to decrease. In this way, the internal air pressure of the interlayer cavity 1110 will not be significantly reduced, and the air supply device group does not need to consume additional or excessive energy to maintain the pressure difference between the interlayer cavity 1110 and the outside world to be relatively stable, thereby saving energy and improving the electric-to-electric conversion efficiency of physical energy storage systems such as gas-liquid two-phase carbon dioxide energy storage systems; it also prevents the gas temperature in the containing cavity 1112 from rising, so that the air pressure in the containing cavity 1112 will not increase, and the air pressure difference between the containing cavity 1112 and the interlayer cavity 1110 will not increase beyond the safe value, and will not cause safety accidents. Specifically, the infrared blocking film used in the outer film 1111 can reduce the infrared transmittance, and to a certain extent avoid the obvious increase in the gas temperature in the interlayer cavity 1110 when the solar radiation is enhanced, thereby to a certain extent avoiding the decrease in the air pressure difference between the interlayer cavity 1110 and the outside world, thereby avoiding the consumption of more electric energy to increase the air supply volume in order to maintain a stable air pressure difference between the interlayer cavity 1110 and the outside world, and avoiding the air pressure difference between the containing cavity 1112 and the interlayer cavity 1110 exceeding the safe value and causing a safety accident. It also avoids the increase in gas temperature in the containing cavity 1112 when solar radiation is enhanced, causing the air pressure to increase, causing the air pressure difference between the containing cavity 1112 and the interlayer cavity 1110 to exceed the safe value and cause a safety accident.

[0044] In order to more clearly understand the stable and energy-saving gas storage system 11 of this embodiment, Figures 1 to 4 The following describes one of its working principles:

[0045] (1) When there is no solar radiation, the gas density in the interlayer cavity 1110 remains unchanged, the gas pressure in the interlayer cavity 1110 remains unchanged, and the working parameters (such as the working frequency) of the air supply device 1130 (such as the air supply fan) in the air supply device group remain unchanged;

[0046] (2) When solar radiation gradually increases, the gas in the interlayer cavity 1110 is affected by solar radiation, the temperature rises, the density decreases, the gas becomes thinner, and the air pressure decreases; after the outer film 1111 adopts the infrared blocking film, the outer surface of the infrared blocking film reflects a part of the radiant heat, and its high infrared blocking property makes it almost impossible for the radiant heat to penetrate into the interlayer cavity 1110; when the infrared blocking film is set to a multi-layer stacking structure, the external heat can rarely be conducted into the interlayer cavity 1110, and the temperature in the interlayer cavity 1110 will not change significantly, so that the air pressure of the interlayer cavity 1110 can be maintained stable, and the working parameters of the air supply device 1130 (such as the air supply fan) in the air supply device group can also remain unchanged, and the energy consumption of the air supply device group is stable. On the other hand, solar radiation will not be transmitted to the containment cavity 1112, causing the temperature of the containment cavity 1112 to rise and the air pressure to increase. The air pressure difference between the containment cavity 1112 and the interlayer cavity 1110 will not increase too high, and the inner film 1113 will not be torn due to excessive tension caused by the internal and external pressure difference.

[0047] It can be seen that the stable and energy-saving gas storage system 11 of this embodiment can reflect and block solar radiation in time when solar radiation increases, thereby maintaining the stability of the air pressure in the interlayer cavity 1110, the stability of the working frequency and number of the air supply device 1130, and the safety of the inner membrane 1113.

[0048] As an example, the gas storage system 11 may also include an inner base structure and an outer base structure. The inner base structure is arranged on the outside of the ground membrane (taking the detachable inner membrane as an example); the outer base structure is arranged on the outside of the inner base structure. The edge of the inner membrane 1113 is fixed to the inner base structure. The edge of the outer membrane 1111 is fixed to the outer base structure. It can be understood that the outer membrane can be directly set on the ground, or it can be set on the ground through the outer base structure, the ground membrane can be directly set on the ground, or it can be set on the ground through the inner base structure, and by setting the inner base structure and the outer base structure, the gas storage system 11 is better fixed in an open air environment.

[0049] As an example, the gas storage system 11 may also include an inner cable net (not shown) and an outer cable net (not shown). The inner cable net is arranged on the outer surface of the inner membrane, and the outer cable net is arranged on the outer surface of the outer membrane 1111. By providing the inner cable net to share the force exerted on the membrane material, the inner membrane 1113 is not easily torn, and its span can be designed to be larger, so that the volume of the accommodating cavity 1112 formed is larger, and the gas storage capacity is therefore greater. At the same time, since the outer surface of the outer membrane 1111 has an outer cable net to share the pressure exerted on the outer membrane 1111 by the gas in the interlayer cavity 1110, the pressure in the interlayer cavity 1110 can be greater, the overall hardness of the formed outer surface is higher, and the ability to resist strong winds and snow is stronger.

[0050] As an example, the inner cable net (not shown) is fixedly connected to the inner base structure. The outer cable net (not shown) is fixedly connected to the outer base structure. The inner base structure, the outer base structure, the inner cable net, and the outer cable net can refer to the inner base structure, the outer base structure, the inner cable net, and the outer cable net disclosed in the Chinese invention patent authorization announcement No. CN113280252B, and the relevant contents disclosed in these patents constitute part of this specification by reference, but the present invention is not limited thereto.

[0051] In summary, the above embodiments of the present invention utilize the different principles of reflection and transmission of solar radiation by different materials, and are simple in design, highly feasible, and easy to implement. Furthermore, they can be standard parts, detachable, and recyclable. In addition, the embodiments of the present invention have good thermal insulation effects, which can keep the gas pressure in the interlayer cavity 1110 of the gas storage system 11 basically unchanged, thereby reducing the extra energy consumption of the equipment.

[0052] Also, see Figure 5 The embodiment of the present invention also provides a physical energy storage system 10, which includes: a stable and energy-saving gas storage system 11, an energy storage component 13, an energy storage container 15 and an energy release component 17; the gas storage system 11, the energy storage component 13, the energy storage container 15 and the energy release component 17 are connected in a closed loop in sequence.

[0053] More specifically, for example, the physical energy storage system 10 is a gas-liquid two-phase carbon dioxide energy storage system, containing a cavity (see Figure 11112) is used to store gaseous energy storage medium such as carbon dioxide, and the inner membrane is, for example, a flexible membrane, so that its volume can be changed; according to the energy storage design requirements of the physical energy storage system 10, such as a gas-liquid two-phase carbon dioxide energy storage system, the gas storage system 11 can be a single gas storage unit or a plurality of gas storage units connected in series or in parallel or in series and parallel to increase the volume. The energy storage component 13 is used to store energy, which is connected between the gas storage system 11 and the energy storage container 13, and for example includes components such as a condenser, an energy storage heat exchanger, and a compressor. The energy storage container 15 is used to store liquid or gas-liquid mixed carbon dioxide. The energy release component 17 is used to release energy, which is connected between the energy storage container 15 and the gas storage system 11, and for example includes components such as an evaporator, an energy release heat exchanger, and an expander. The energy storage component 13, energy release component 17, and energy storage container 15 can refer to the energy storage components, energy release components, and liquid storage tanks disclosed in Chinese invention patent authorization announcement numbers CN112985143B, CN112985144B, CN114109549B, and CN112985145B, and the relevant contents disclosed in these patents constitute part of this specification by reference, but the physical energy storage system of the embodiments of the present invention is not limited thereto.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art can still modify or make equivalent substitutions to the specific implementations of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention.

Claims

1. A stable and energy-saving gas storage system, characterized in that: It includes an inner film and an outer film covering the outer side of the inner film, a containing cavity is formed on the inner side of the inner film, the containing cavity is used to store gas, an interlayer cavity is formed between the inner film and the outer film, the interlayer cavity is configured to be in a non-closed state when the outer film is propped up, and the outer film is an infrared blocking film.

2. The gas storage system according to claim 1, characterized in that: The reflectivity of the infrared blocking film to near infrared light with a wavelength of 780nm-2125nm is greater than 70%.

3. The gas storage system according to claim 1, characterized in that: The infrared blocking film is a multi-layer stacked structure, including: a base layer, a first planarization layer, a second planarization layer, an adhesive layer and an infrared blocking layer, the first planarization layer is located on the outside of the base layer, the second planarization layer is located on the inside of the base layer, and the infrared blocking layer is bonded to the side of the first planarization layer away from the base layer through the adhesive layer.

4. The gas storage system according to claim 3, characterized in that: The infrared blocking layer includes an infrared reflective material, and the infrared reflective material is one of titanium dioxide, cesium tungstate, indium tin oxide, sodium zinc phosphate and bismuth molybdate, or any combination thereof.

5. The gas storage system according to claim 4, characterized in that: The infrared blocking layer has a thickness ranging from 20 μm to 50 μm.

6. The gas storage system according to claim 1, characterized in that: It also includes an air supply device group, which is connected to the interlayer cavity and is used to supply air to the interlayer cavity so that the outer membrane is propped up upward.

7. The gas storage system according to claim 6, characterized in that: The air supply device group includes one or more air supply devices, and is used to supply air to the interlayer cavity so that the pressure difference between the gas pressure in the interlayer cavity and the external atmospheric pressure is maintained at 50Pa-800Pa.

8. The gas storage system according to any one of claims 1 to 7, characterized in that: The gas storage system further comprises an exhaust device group, wherein the exhaust device group comprises one or more exhaust devices connected to the interlayer cavity and used for exhausting the interlayer cavity.

9. A physical energy storage system, characterized in that: It comprises the gas storage system, energy storage component, energy storage container and energy release component as described in any one of claims 1 to 8, wherein the gas storage system, the energy storage component, the energy storage container and the energy release component are connected in a closed loop in sequence.

10. The physical energy storage system according to claim 9, characterized in that: The physical energy storage system is a gas-liquid two-phase carbon dioxide energy storage system, and the containing cavity is used to store gaseous carbon dioxide as an energy storage working fluid.

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