Pressurized container

Abstract

To reduce sloshing of liquid inside a pressurized container and prevent destruction of thermal stratification.SOLUTION: A pressurized container is provided, comprising a container body for storing a liquid with a gas phase in contact with a top surface of a liquid phase, and a suppression member provided in the container body at a position above a thermal stratification interface, or an interface between a first temperature layer of the liquid phase and a second temperature layer of the liquid phase formed at a temperature lower than that of the first temperature layer and at a position below the first temperature layer, to prevent sloshing of the liquid.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to pressurized containers. [Background technology]

[0002] There is known a technology for a pressurized container that stores a liquid under pressure. For example, Patent Document 1 describes a pressurized container that stores boric acid water in a container under pressure, in which the boric acid water above the middle part of the container is kept at a high temperature and the boric acid water below the middle part is kept at a low temperature, and when the pressure inside the container decreases when the boric acid water is released, the high-temperature boric acid water vaporizes, increasing the pressure inside the container, and the boric acid water inside the container can be continuously sent out of the container without using an external device such as a pump. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3477271 Summary of the Invention [Problem to be solved by the invention]

[0004] Such pressurized containers may vibrate due to external factors, causing the liquid inside to slosh, disrupting the temperature stratification and stirring the high-temperature and low-temperature liquids. This may make it difficult for the liquid inside the container to vaporize when the liquid is released, potentially reducing the effectiveness of the pressurized container in pumping the liquid out of the container. Therefore, there is a need for a pressurized container that suppresses sloshing of the liquid inside the container.

[0005] The present disclosure has been made in view of the above, and aims to provide a pressurized container that suppresses sloshing of liquid inside the container. [Means for solving the problem]

[0006] The pressurized container according to the present disclosure comprises a container body for storing a liquid with a gas phase in contact with the upper surface of the liquid phase, and a suppression member provided in the container body at a position above a temperature stratification interface, which is the boundary surface between a first temperature layer of the liquid phase and a second temperature layer formed below and at a lower temperature than the first temperature layer, for suppressing sloshing of the liquid. [Effects of the Invention]

[0007] According to the present disclosure, a pressurized container can be provided that suppresses sloshing of liquid within the container. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a pressurized container according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 3 is a schematic diagram of a pressurized container according to the second embodiment. [Figure 4] FIG. 4 is a schematic diagram of a pressurized container according to the third embodiment. [Figure 5] FIG. 5 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. 6 is a diagram illustrating the shape of a suppression member according to a first modification of the third embodiment. [Figure 7] FIG. 7 is a diagram illustrating the shape of a suppression member according to Modification 2 of the third embodiment. [Figure 8] FIG. 8 is a schematic diagram of a pressurized container according to the fourth embodiment. [Figure 9] FIG. 9 is a cross-sectional view taken along CC in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the present disclosure is not limited to these embodiments, and when there are multiple embodiments, the present disclosure also includes configurations in which the respective embodiments are combined.

[0010] (First embodiment) The configuration of the pressurized container will be described with reference to Fig. 1. Fig. 1 is a schematic diagram of the pressurized container according to this embodiment.

[0011] (Pressurized container) 1, the pressurized vessel 1 according to this embodiment includes a vessel body 10, a suppression member 20, a heat insulating material 2, a heater unit 3, and piping 4. The pressurized vessel 1 according to this embodiment is used as a storage vessel for cooling water in a nuclear power plant, but its use is not limited to nuclear power plants.

[0012] (Container body) The container body 10 is a pressure-resistant container that stores liquid R with a gas phase VL in contact with the upper surface of the liquid phase RL. Here, the liquid phase RL is a layer of liquid R, and the gas phase VL in contact with the upper surface of the liquid phase RL is a layer of gas containing vaporized liquid R. The gas phase VL may contain gases other than the vaporized liquid R (e.g., air). The container body 10 according to this embodiment is, for example, a sealable container that stores pressurized liquid R with the gas phase VL in contact with the upper surface of the liquid phase RL. Hereinafter, as shown in FIG. 1, the vertical direction is referred to as the Z direction. The Z1 direction, which is one of the Z directions, refers to the upward vertical direction, and the Z2 direction, which is the opposite direction to the Z1 direction, refers to the downward vertical direction. In this embodiment, the container body 10 is arranged so that its longitudinal direction is the Z direction, but this is not limited thereto and it may be arranged in any direction, and the shape of the container body 10 may also be any desired shape. Note that the liquid R according to this embodiment is boric acid water, but is not limited thereto.

[0013] (liquid phase) The liquid phase RL (liquid R) stored in the container body 10 is divided into two temperature layers: a temperature layer HW and a temperature layer CW. The temperature layer CW is a temperature layer that is lower in temperature than the temperature layer HW and is formed in the Z2 direction of the temperature layer HW. Hereinafter, the interface between the temperature layer HW and the temperature layer CW will be referred to as the temperature stratification interface TI. As will be described in detail later, when the liquid phase RL (liquid R) is heated by the heater unit 3, the temperature layer HW is formed, and the temperature layer CW is formed in the Z2 direction of the temperature layer HW.

[0014] (heater part) The heater unit 3 is a device attached to the container body 10 and heats the container body 10. The heater unit 3 of this embodiment generates heat when a current flows through it, and heats an object. The heater unit 3 heats the liquid R in the container body 10, thereby forming a temperature layer HW, and a temperature layer CW is formed in the Z2 direction of the temperature layer HW.

[0015] The heater unit 3 may be installed at any position, but in this embodiment, it is provided on the outer wall surface of the container body 10. Furthermore, in this embodiment, the heater unit 3 is provided at a position overlapping the temperature layer HW in the Z direction. That is, assuming that the Z2-direction end of the heater unit 3 is the lower end 3D and the Z1-direction end is the upper end 3U, and the heater unit 3 extends from the lower end 3D to the upper end 3U, it can be said that at least a portion of the Z-direction section of the heater unit 3 from the lower end 3D to the upper end 3U overlaps the temperature layer HW in the Z direction. Furthermore, in this embodiment, it is desirable that the lower end 3D of the heater unit 3 be located in the Z1 direction farther away from the bottom surface of the container body 10 in the Z2 direction than a position spaced apart in the Z1 direction by ⅓ of the total length of the container body 10 in the Z direction.

[0016] (Heat insulation material) The heat insulating material 2 is attached to the container body 10 and is a member that suppresses heat radiation from the container body 10. The heat insulating material 2 suppresses heat radiation from the liquid phase RL (temperature layer HW) heated by the heater section 3. This allows the container body 10 to store the liquid phase RL in a state where two temperature stratifications, the temperature layer HW and the temperature layer CW, are formed.

[0017] The heat insulating material 2 may be installed at any position, but in this embodiment, it is installed so as to cover the outer wall surface of the container body 10. In this case, it may be set so as to cover the entire outer wall surface of the container body 10, or it may be set so as to cover a portion of the outer wall surface of the container body 10. In this embodiment, the heat insulating material 2 is installed on the outer wall surface at a position overlapping with the temperature layer HW in the Z direction. That is, if the Z2-direction end of the heat insulating material 2 is defined as a lower end 2D, the Z1-direction end of the heat insulating material 2 is defined as an upper end 2U, and the heat insulating material 2 extends from the lower end 2D to the upper end 2U, it can be said that at least a portion of the Z-direction section of the heat insulating material 2 from the lower end 2D to the upper end 2U overlaps with the temperature layer HW in the Z direction. Furthermore, in this embodiment, the lower end 2D of the heat insulating material 2 is located on the Z2-direction side of the temperature layer interface TI. Furthermore, it is desirable that the lower end 2D of the heat insulating material 2 according to this embodiment be located in the Z1 direction at a position that is 1 / 3 of the total length in the Z direction of the container body 10 away from the bottom surface of the container body 10 in the Z2 direction. Furthermore, the lower end 2D of the heat insulating material 2 is located in the Z2 direction further than the lower end 3D of the heater section 3, and covers the heater section 3. Note that the material of the heat insulating material 2 according to this embodiment is rock wool, which has a high heat resistance temperature, but is not limited to rock wool.

[0018] (Plumbing) The pipe 4 connects the container body 10 with an external device or external facility and is a pipe for discharging the liquid R from the container body 10, and a valve 5 is connected midway along the pipe 4. As shown in FIG. 1 , there is one pipe 4 in this embodiment, but the number of pipes 4 is not limited to one and may be multiple. The valve 5 is a valve that controls the release of the liquid R from the container body 10. By opening the valve 5, the liquid R stored in the container body 10 is released to the outside. The type of the valve 5 is not limited to either a mechanical type or an electromagnetic type.

[0019] As described above, the liquid R in the container body 10 is heated by the heater unit 3 and separated into temperature layers HW and CW. When the valve 5 is opened while the liquid R containing the temperature layers HW and CW is stored, the liquid R in the temperature layer CW formed in the Z2 direction is released to the outside of the container through the pipe 4. As the release of the liquid R continues, the position of the water surface WS of the liquid R moves in the Z2 direction. This increases the volume of the gas phase VL, and the pressure inside the container decreases. As the pressure inside the container decreases, the liquid phase RL boils under reduced pressure in the temperature layer HW and vaporizes, forming a vapor pressure corresponding to the temperature of the temperature layer HW. This pressure allows the liquid R in the temperature layer CW to be continuously released to the outside. In this way, the pressurized container 1 stores the liquid R in a state in which high and low temperature layers are formed, allowing the liquid R to be continuously released to the outside at a predetermined pressure corresponding to the pressure inside the container without using an external device such as a pump.

[0020] (Sloshing) In a container storing liquid R separated into temperature layers HW and CW, such as the pressurized container 1 according to this embodiment, sloshing may occur, causing the temperature stratification interface TI to collapse. Sloshing refers to the swaying of liquid R within the container. In other words, sloshing of the liquid R inside the container agitates the temperature layers HW and CW of the liquid phase RL, causing the temperature of the temperature layer HW to drop. This may make it difficult for the liquid phase RL in the temperature layer HW inside the container to vaporize when the valve 5 is opened to release the liquid R, potentially reducing the force with which the pressurized container 1 pumps the liquid R out of the container. Furthermore, sloshing may generate a large force due to the mass of the stored liquid R against the container, potentially leading to unexpected damage to the container. In response to this, the pressurized container 1 according to this embodiment is provided with a suppression member 20 to suppress sloshing. Details of the suppression member 20 are described below.

[0021] (Restraining member) The suppression member 20 is a member that suppresses sloshing of the liquid R stored in the container body 10. The suppression member 20 is attached to the container body 10 so as to be located in the Z1 direction relative to the temperature stratification interface TI, which is the boundary surface between the temperature layer HW and the temperature layer CW. In other words, the suppression member 20 is attached to the container body 10 so that its lower end, which is the end of the suppression member 20 in the Z2 direction, is located in the Z1 direction relative to the temperature stratification interface TI. Furthermore, because the temperature layer HW is formed by the heater unit 3, it is desirable that the suppression member 20 be attached to the container body 10 so that its lower end is located in the Z1 direction relative to the lower end 3D of the heater unit 3.

[0022] The pressurized container 1 according to this embodiment includes a suppression member 20A as the suppression member 20. FIG. 2 is a cross section taken along line AA in FIG. 1. As shown in FIG. 2, the suppression member 20A is attached to the inner wall surface of the container body 10. Specifically, when the central axis of the container body 10 parallel to the Z direction is defined as the axial direction, the suppression member 20A according to this embodiment is attached to at least a portion of the entire circumferential section of the inner wall surface of the container body 10. Specifically, the suppression member 20A extends in the circumferential direction. When the radially inner side portion of the suppression member 20A is defined as 20Ab and the radially outer side portion is defined as 20Aa, the side portion 20Aa of the suppression member 20A is attached to the inner wall surface of the container body 10 and extends in the circumferential direction. Furthermore, it is preferable that a slit SL is formed in the suppression member 20A. The number of slits SL is arbitrary. However, when multiple slits SL are formed, the multiple slits SL are formed side by side in the circumferential direction. It is preferable that the slits SL have a very narrow gap. For example, the width (circumferential length) of the slit SL of the suppression member 20A in this embodiment may be less than 1 / 100 of the circumferential length of one suppression member 20A divided by the slit SL, or may be less than 1 / 100 of the outer diameter of the suppression member 20A.

[0023] In this embodiment, a plurality of suppression members 20A are provided in the Z direction. Of the plurality of suppression members 20A, the suppression member 20A attached furthest in the Z1 direction is attached so that its Z1-direction end face U1 is positioned further in the Z1 direction than the water surface WS. Furthermore, of the plurality of suppression members 20A, the suppression member 20A attached furthest in the Z2 direction is attached so that its Z2-direction end face D1 is positioned further in the Z1 direction than the temperature stratification interface TI.

[0024] Each of the multiple suppression members 20A is preferably made of a material that is rigid enough to avoid breakage or deformation due to the force generated by the sloshing of the liquid R, and that is corrosion-resistant enough to avoid corrosion by the liquid R. For example, the suppression members 20A according to this embodiment may be made of SUS304 material. Furthermore, the method of attaching the suppression members 20A to the container body 10 may be any method. For example, the suppression members 20A according to this embodiment may be attached to the container body 10 by welding.

[0025] (effect) As described above, the pressurized vessel 1 according to this embodiment includes the suppression member 20A located in the Z1 direction relative to the temperature stratification interface TI. This prevents the liquid phase RL from moving in the Z direction along the inner wall surface of the vessel body 10 when the pressurized vessel 1 is subjected to vibration due to an external factor. The suppression member 20A interferes with the liquid phase RL and inhibits it, thereby suppressing sloshing of the liquid R. In other words, the suppression member 20A according to this embodiment suppresses sloshing of the liquid R and prevents the temperature layers HW and CW of the liquid phase RL from mixing, i.e., the temperature stratification from collapsing. This prevents a decrease in the force of the pressurized vessel 1 to pump the liquid R out of the vessel. Furthermore, because all of the suppression members 20A located in the Z2 direction relative to the water surface WS are at the same temperature as the temperature layer HW, even if the valve 5 is opened, the liquid R is released to the outside, and the position of the water surface WS of the liquid R moves in the Z2 direction, no heat transfer occurs between the temperature layer HW of the liquid phase RL and the suppression member 20A located in the Z2 direction relative to the water surface WS. In other words, even if the valve 5 opens and the position of the water surface WS changes, the temperature of the temperature layer HW does not change, so the force that sends the liquid R out of the container is prevented from decreasing due to a drop in the temperature of the temperature layer HW.

[0026] Furthermore, when the container body 10 is heated by the heater unit 3, the suppression member 20A is also heated along with the wall surface of the container body 10. As a result, the heat from the heater unit 3 is transferred to the liquid-phase RL not only from the inner wall surface of the container body 10 but also from the surface of the suppression member 20A, and the suppression member 20A exerts a fin effect, which can improve the temperature rise rate of the liquid-phase RL, leading to earlier start-up of the pressurized container 1.

[0027] Furthermore, by forming the slits SL in the suppressing member 20A according to this embodiment, stress generated at the connection between the container body 10 and the suppressing member 20A due to differential thermal expansion when the temperature difference between the container body 10 and the suppressing member 20A is large, such as when the temperature of the liquid phase RL is rising, can be reduced, preventing damage to the container body 10. Furthermore, by reducing the stress generated at the connection between the container body 10 and the suppressing member 20A, the rate at which the temperature of the liquid phase RL rises can be improved, which can lead to earlier start-up of the pressurized container 1.

[0028] Furthermore, by making the slit SL of the suppression member 20A a very narrow gap, the liquid-phase RL in the temperature layer HW is prevented from leaking from the slit SL into the gas phase VL, thereby preventing the liquid-phase RL from scattering (vaporizing). As a result, when the liquid-phase RL is scattered (vaporized) into the gas phase VL, the temperature of the temperature layer HW drops due to the heat of vaporization, and it is possible to suppress a decrease in the ability of the pressurized vessel 1 to release the liquid-phase RL to the outside.

[0029] (Second embodiment) Next, a second embodiment will be described. The suppression member 20A according to the first embodiment is provided over at least a portion of the entire circumferential section of the inner wall surface of the container body 10, and multiple suppression members are arranged side by side in the Z direction, but the suppression member 20B according to the second embodiment has a porous structure. Note that in the second embodiment, a description of the configuration common to the first embodiment will be omitted.

[0030] Fig. 3 is a schematic diagram of a pressurized container according to this embodiment. As shown in Fig. 3, the pressurized container 1 according to this embodiment includes a suppressing member 20B, which is a porous structure, on the inner wall surface of the container body 10.

[0031] The suppression member 20B according to this embodiment has a porous structure. A porous structure is a member having a plurality of open holes. The suppression member 20B according to this embodiment extends in the circumferential direction and the Z direction. If the radially inner side of the suppression member 20B is designated 20Bb and the radially outer side is designated 20Ba, the side 20Ba is attached to the inner wall surface of the container body 10. The suppression member 20B is attached so that its Z1-direction end face U2 is located in the Z1 direction relative to the water surface WS. The suppression member 20B is attached to the container body 10 so that its Z2-direction end face D2 is located in the Z1 direction relative to the temperature stratification interface TI. The suppression member 20B is preferably attached to the container body 10 so that its end face D2 is located in the Z1 direction relative to the lower end 3D of the heater unit 3.

[0032] Here, the suppression member 20B according to this embodiment is desirably made of a material that is rigid enough to avoid breakage or deformation due to the force generated by the sloshing of the liquid R, and that is corrosion-resistant enough to avoid corrosion by the liquid R. For example, the suppression member 20B according to this embodiment is an aluminum porous metal structure. Furthermore, the suppression member 20B may be attached to the container body 10 by any method. For example, the suppression member 20B according to this embodiment is attached to the container body 10 by welding.

[0033] (effect) As described above, the pressurized container 1 according to this embodiment is provided with the suppression member 20B. When the pressurized container 1 is subjected to vibration due to an external factor, the liquid phase RL attempts to move along the suppression member 20B attached to the inner wall surface of the container body 10. This is impeded by frictional resistance with the suppression member 20B, which has a surface area larger than that of the inner wall surface of the container body 10, thereby suppressing sloshing of the liquid R. In other words, the suppression member 20B according to this embodiment suppresses sloshing of the liquid R and suppresses mixing of the temperature layer HW and temperature layer CW of the liquid phase RL, i.e., collapse of the temperature stratification. This makes it possible to suppress a decrease in the force of the pressurized container 1 to pump the liquid R out of the container.

[0034] (Third embodiment) In the first and second embodiments, sloshing of the liquid phase RL is suppressed by causing the suppression member 20 attached to the inner wall surface of the container body 10 to interfere with the liquid phase RL, or by changing the surface in contact with the liquid phase RL to a suppression member 20 with a high frictional resistance. In the third embodiment, when viewed from the Z direction of the container body 10, the internal space of the container body 10 is partitioned into multiple spaces, and the distance over which the liquid phase RL can move in each partitioned space (maximum distance between wall surfaces) is reduced. In addition, the area of ​​the wall in contact per volume of the liquid phase RL is increased, thereby increasing the relative frictional force between the liquid phase RL and the wall surfaces, thereby suppressing sloshing. Note that in the third embodiment, a description of the configuration common to the first embodiment will be omitted.

[0035] FIG. 4 is a schematic diagram of a pressurized container according to this embodiment. As shown in FIG. 4, the pressurized container 1 according to this embodiment includes a suppression member 20C as the suppression member 20. The suppression member 20C is a member extending in the Z direction. The suppression member 20C divides the internal space of the container body 10 into multiple spaces when viewed from the Z direction. The suppression member 20C is attached so that its Z1-direction end face U3 is located in the Z1 direction relative to the water surface WS. The suppression member 20C is also attached so that its Z2-direction end face D3 is located in the Z1 direction relative to the temperature stratification interface TI. It is also desirable that the suppression member 20C be attached so that its Z2-direction end face D2 is located in the Z1 direction relative to the lower end 3D of the heater unit 3.

[0036] (Communication hole) The multiple spaces partitioned by the suppression member 20C are connected to each other at locations other than those partitioned by the suppression member 20C. Specifically, communication holes are formed in the space inside the container body 10, connecting the spaces partitioned by the suppression member 20C to each other. In this embodiment, the communication holes are a communication hole UH1 and a communication hole DH1. The communication hole UH1 is an opening that connects the spaces partitioned by the suppression member 20C to each other, and the communication hole DH1 is formed in the Z2 direction from the communication hole UH1 to connect the spaces partitioned by the suppression member 20C to each other. By forming the communication hole UH1 and the communication hole DH1 in this manner, for example, the gas phase VL can move within the space via the communication hole UH1 on the Z1 direction side, and the liquid R can move within the space via the communication hole DH1 on the Z2 direction side.

[0037] The communicating holes UH1 and DH1 may have any shape and size. For example, in this embodiment, as shown in FIG. 4, the end face U3 of the suppressing member 20C does not contact the inner wall surface of the container body 10 on the Z1 side, and therefore the space between the end face U3 and the inner wall surface of the container body 10 on the Z1 side serves as the communicating hole UH1. Similarly, the end face D3 of the suppressing member 20C does not contact the inner wall surface of the container body 10 on the Z2 side, and therefore the space between the end face D3 and the inner wall surface of the container body 10 on the Z2 side serves as the communicating hole DH1. Alternatively, the communicating holes UH1 and DH1 may be formed in the suppressing member 20C itself.

[0038] FIG. 5 is a cross section taken along the line BB in FIG. 4. As shown in FIG. 5, the suppression member 20C (20) according to this embodiment is a flat plate-like member that extends in the Z direction of the container body 10 and divides the interior space of the container body 10 into four spaces as viewed from the Z direction. Here, the suppression member 20C is preferably made of a material that is rigid enough to withstand damage and deformation due to the force generated by sloshing of the liquid R and corrosion-resistant enough to withstand corrosion by the liquid R. For example, the suppression member 20C according to this embodiment is a member formed by connecting four SUS304 flat plates at the cross-sectional center O2 of the container body 10 in FIG. 5. The suppression member 20C may be attached to the container body 10 by any method. For example, the suppression member 20C according to this embodiment is attached to the container body 10 by welding.

[0039] 6 and 7 are diagrams illustrating the shape of a suppression member according to a modified example of the third embodiment. Up to this point, the third embodiment has been described in which the suppression member 20C (20) divides the space of the container body 10 into four spaces, but the number of spaces divided by the suppression member 20 is not limited to four. For example, as shown in FIG. 6, the suppression member 20C may divide the space into three spaces, or as shown in FIG. 7, it may divide the space into five spaces.

[0040] (effect) As described above, the pressurized container 1 according to this embodiment includes the suppression member 20C, which divides the internal space of the container body 10 into multiple sections when viewed in the Z direction. As a result, in the spaces divided by the suppression member 20C, the maximum distance the liquid phase RL can move (the maximum distance between the wall surfaces) is smaller than the inner diameter of the container body 10. Additionally, the area of ​​the wall in contact with the liquid phase RL per volume increases, thereby increasing the relative frictional force between the liquid phase RL and the wall surfaces, thereby suppressing sloshing of the liquid R. In other words, the suppression member 20C according to this embodiment suppresses sloshing of the liquid R and prevents the temperature layers HW and CW of the liquid phase RL from mixing, i.e., prevents the temperature stratification from collapsing. This prevents a decrease in the force with which the pressurized container 1 pumps the liquid R out of the container.

[0041] Furthermore, the spaces separated by the suppression member 20C according to this embodiment are connected to each other via the communication holes UH1 and DH1. Therefore, the gas phase VL and the liquid phase RL can move within the spaces via these communication holes UH1 and DH1. This allows the pressure in the gas phase VL at the top of each space to be equalized, even if the amount of gas generated by the decompression boiling of the temperature layer HW varies among the spaces separated by the suppression member 20C when the valve 5 is opened and the liquid R is released to the outside. Furthermore, the height of the water surface WS of the liquid phase RL in each space can be kept uniform. In other words, the temperature layers HW and CW of the liquid phase RL are prevented from mixing, i.e., the temperature stratification is prevented from collapsing, due to variations in the height of the water surface WS of the liquid phase RL among the separated spaces. This prevents a decrease in the force of the pressurized container 1 to pump the liquid R out of the container.

[0042] (Fourth embodiment) Next, a fourth embodiment will be described. A suppressing member 20F according to the fourth embodiment differs from the suppressing member 20C according to the third embodiment in that it has a cylindrical shape. In the fourth embodiment, descriptions of parts that are common to the third embodiment will be omitted.

[0043] FIG. 8 is a schematic diagram of a pressurized container according to this embodiment. As shown in FIG. 8, the pressurized container 1 according to this embodiment includes a suppression member 20F as the suppression member 20. The suppression member 20F is a tubular member that extends in the Z direction of the container body 10 and divides the interior space of the container body 10 into multiple spaces as viewed from the Z direction. In this embodiment, the suppression member 20F is a tubular member with open ends on the Z1 direction side and the Z2 direction side, and more specifically, is a cylindrical member. However, the shape of the suppression member 20F is not limited to a cylindrical shape and may be, for example, a rectangular tube. The suppression member 20F divides the interior space of the container body 10 into a space surrounded by the suppression member 20F and a space surrounded by the inner wall surface of the container body 10 and the outer wall surface of the suppression member 20F. Specifically, the suppression member 20F is attached so that its Z1-direction end face U4 is positioned in the Z1 direction relative to the water surface WS. The suppressing member 20F is attached so that its end face D4 in the Z2 direction is located further in the Z1 direction than the thermal stratification interface TI. It is also desirable that the suppressing member 20F is attached so that its end face D4 in the Z2 direction is located further in the Z1 direction than the lower end 3D of the heater unit 3.

[0044] Furthermore, the multiple spaces partitioned by the suppression member 20F are in communication with each other at locations other than those partitioned by the suppression member 20F. Specifically, the internal space of the container body 10 is formed with a communication hole UH1 and a communication hole DH1 that connect the spaces partitioned by the suppression member 20F to each other. In this embodiment, an opening formed at the end of the cylindrical suppression member 20F on the Z1 direction side serves as the communication hole UH1, and an opening formed at the end of the suppression member 20F on the Z2 direction side serves as the communication hole DH1. Alternatively, the communication hole UH1 and the communication hole DH1 may be formed in the suppression member 20F itself.

[0045] FIG. 9 is a cross section taken along CC in FIG. 8. As shown in FIG. 9, the center of the cross section of the suppression member 20F according to this embodiment coincides with the center of the cross section O5 of the vessel body 10 in FIG. 9. The suppression member 20F is fixed by four support rods 6 attached to the inner wall surface of the vessel body 10. The number of support rods 6 may be set arbitrarily. Here, the suppression member 20F is preferably made of a material that is rigid enough to withstand damage and deformation due to the force generated by the sloshing of the liquid R and corrosion-resistant enough to withstand corrosion by the liquid R. For example, the suppression member 20F according to this embodiment is a cylindrical member made of SUS304. The outer diameter of the suppression member 20F may be set arbitrarily, but it is desirable that the maximum distance that the liquid phase RL can move in the space between the inside and outside of the cylinder partitioned by the suppression member 20F be small. For example, as shown in Figure 9, when the cross-sectional shape of the container body 10 is a circle with an inner diameter of 3r when viewed from the Z direction, the outer diameter of the suppression member 20F in this embodiment is set to r so that the diameter of the container body 10 is divided into three equal parts by the suppression member 20F.

[0046] Similarly, the support rod 6 is also desirably made of a material that is rigid enough to avoid breakage or deformation due to the force generated by the sloshing of the liquid R, and that is corrosion-resistant enough to avoid corrosion by the liquid R. For example, the support rod 6 according to this embodiment is a cylindrical member made of SUS304.

[0047] Any method may be used to attach the suppression member 20F to the support rod 6 and the support rod 6 to the container body 10. For example, the suppression member 20F according to this embodiment is attached to the support rod 6 by welding, and the support rod 6 is attached to the inner wall surface of the container body 10 by welding.

[0048] (effect) As described above, the pressurized container 1 according to this embodiment includes the suppression member 20F, which divides the internal space of the container body 10 into multiple sections when viewed in the Z direction. As a result, in the spaces divided by the suppression member 20F, the maximum distance the liquid phase RL can move (the maximum distance between the wall surfaces) is smaller than the inner diameter of the container body 10. Additionally, the area of ​​the wall in contact with the liquid phase RL per volume increases, thereby increasing the relative frictional force between the liquid phase RL and the wall surfaces, thereby suppressing sloshing of the liquid R. In other words, the suppression member 20F according to this embodiment suppresses sloshing of the liquid R and prevents the temperature layers HW and CW of the liquid phase RL from mixing, i.e., the temperature stratification from collapsing. This prevents a decrease in the force with which the pressurized container 1 pumps the liquid R out of the container.

[0049] Furthermore, the spaces separated by the suppression member 20F according to this embodiment are connected to each other via the communication holes UH1 and DH1. Therefore, the gas phase VL and the liquid phase RL can move within the spaces via these communication holes UH1 and DH1. This allows the pressure in the gas phase VL at the top of each space to be equalized, even if the amount of gas generated by the decompression boiling of the temperature layer HW varies among the spaces separated by the suppression member 20F when the valve 5 is opened and the liquid R is released to the outside. Furthermore, the height of the water surface WS of the liquid phase RL in each space can be kept uniform. In other words, the temperature layers HW and CW of the liquid phase RL are prevented from mixing, i.e., the temperature stratification is prevented from collapsing, due to variations in the height of the water surface WS of the liquid phase RL among the separated spaces. This prevents a decrease in the force of the pressurized container 1 to pump the liquid R out of the container.

[0050] (Effects of the present disclosure) A pressurized container 1 according to a first aspect of the present disclosure includes a container body 10 that stores liquid R with a gas phase VL in contact with the upper surface of the liquid phase RL, and a suppression member 20A that is disposed on the container body 10 at a position on the Z1 side of a temperature stratification interface TI, which is the boundary between a first temperature layer HW of the liquid phase RL and a second temperature layer CW that is lower in temperature than the first temperature layer HW and is formed in the Z2 direction. The suppression member 20A suppresses sloshing of the liquid R. According to the present disclosure, sloshing of the liquid R inside the container body 10 can be suppressed. This suppresses agitation between the temperature layers HW and CW of the liquid phase RL, thereby suppressing a decrease in the force of the pressurized container 1 to pump the liquid R out of the container. Furthermore, because the suppression members 20A located in the Z2 direction above the water surface WS all have the same temperature as the temperature layer HW, even if the valve 5 is opened, the liquid R is released to the outside, and the position of the water surface WS of the liquid R moves in the Z2 direction, no heat transfer occurs between the temperature layer HW of the liquid phase RL and the suppression member 20A located in the Z2 direction above the water surface WS. In other words, even if the valve 5 opens and the position of the water surface WS changes, the temperature of the temperature layer HW does not change, so the force that sends the liquid R out of the container can be prevented from decreasing due to a drop in the temperature of the temperature layer HW.

[0051] A pressurized container 1 according to a second aspect of the present disclosure is the pressurized container 1 according to the first aspect, further comprising a heater unit 3 attached to the container body 10 for heating the container body 10, and a suppression member 20A disposed on the Z1 side of the lower end of the heater unit 3. According to the present disclosure, the suppression member 20A is disposed on the container body 10 at a position on the Z1 side of the lower end of the heater unit 3 and on the Z1 side of the temperature stratification interface TI. As a result, all of the suppression members 20A located in the Z2 direction from the water surface WS are at the same temperature as the temperature layer HW. Therefore, even if the valve 5 is opened and the liquid R is released to the outside, and the position of the water surface WS of the liquid R moves in the Z2 direction, no heat transfer occurs between the temperature layer HW of the liquid phase RL and the suppression member 20A located in the Z2 direction from the water surface WS. In other words, even if the valve 5 is opened and the position of the water surface WS changes, the temperature of the temperature layer HW does not change, and therefore, a decrease in the force that sends the liquid R out of the container due to a decrease in the temperature of the temperature layer HW can be suppressed.

[0052] A pressurized container 1 according to a third aspect of the present disclosure is the pressurized container 1 according to the first or second aspect, wherein the suppression member 20A is attached to the inner wall surface of the container body 10. According to the present disclosure, when the container body 10 is heated, the suppression member 20A is also heated along with the wall surface of the container body 10. As a result, heat from the heater unit 3 is transferred to the liquid-phase RL not only from the inner wall surface of the container body 10 but also from the surface of the suppression member 20A, and the suppression member 20A exerts a fin effect, which can improve the rate at which the temperature of the liquid-phase RL rises, leading to earlier start-up of the pressurized container 1.

[0053] A pressurized container 1 according to a fourth aspect of the present disclosure is the pressurized container 1 according to the third aspect, wherein the suppression member 20A is provided over at least a portion of the entire circumferential section of the inner wall surface of the container body 10, and a plurality of suppression members 20A are provided side by side in the Z direction of the container body 10. According to the present disclosure, when the pressurized container 1 is subjected to vibration due to an external factor, the suppression member 20A interferes with the liquid phase RL and inhibits it from moving in the Z direction along the inner wall surface of the container body 10, thereby suppressing sloshing of the liquid R. This suppresses mixing of the temperature layers HW and CW of the liquid phase RL, i.e., collapse of the temperature stratification, and suppresses a decrease in the force of the pressurized container 1 to pump the liquid R out of the container.

[0054] A pressurized container 1 according to a fifth aspect of the present disclosure is the pressurized container 1 according to the third aspect, wherein the suppression member 20B has a porous structure. According to the present disclosure, when the pressurized container 1 is subjected to vibration due to an external factor, the liquid phase RL attempts to move along the suppression member 20B attached to the inner wall surface of the container body 10, but the suppression member 20B, which is a porous structure with a larger surface area than the inner wall surface of the container body 10, inhibits the liquid phase RL from moving along the suppression member 20B by frictional resistance, thereby suppressing sloshing of the liquid R. This suppresses mixing of the temperature layers HW and CW of the liquid phase RL, i.e., collapse of the temperature stratification, and suppresses a decrease in the force of the pressurized container 1 to pump the liquid R out of the container.

[0055] A pressurized container 1 according to a sixth aspect of the present disclosure is the pressurized container 1 according to the third aspect, wherein the suppression member 20C extends in the Z direction of the container body 10 and divides the interior space of the container body 10 into multiple spaces as viewed from the Z direction, and the multiple spaces are in communication with each other at locations other than those divided by the suppression member 20C. According to the present disclosure, in the spaces divided by the suppression member 20C, the maximum distance over which the liquid phase RL can move (the maximum distance between the wall surfaces) is smaller than the inner diameter of the container body 10, thereby suppressing sloshing of the liquid R. This suppresses agitation of the temperature layers HW and CW of the liquid phase RL, and suppresses a decrease in the force with which the pressurized container 1 pumps the liquid R out of the container. Furthermore, even if there is a distribution in the amount of gas generated by decompression boiling of the temperature layer HW in each space separated by the suppression member 20C when releasing the liquid R to the outside, the pressure in the gas phase VL at the top of each space is made uniform, and the height position of the water surface WS of the liquid phase RL in each space can be kept uniform, and the position of the temperature stratification interface TI in each space can also be kept uniform. This prevents the temperature layers HW and CW of the liquid phase RL from mixing, i.e., prevents the temperature stratification from collapsing, and prevents a decrease in the force of the pressurized container 1 to send the liquid R out of the container.

[0056] A pressurized container 1 according to a seventh aspect of the present disclosure is the pressurized container 1 according to the sixth aspect, wherein the suppression member 20C is a flat member. According to the present disclosure, in the space partitioned by the suppression member 20C, the maximum distance that the liquid phase RL can move (the maximum distance between the wall surfaces) is smaller than the inner diameter of the container body 10, thereby suppressing sloshing of the liquid R. This suppresses mixing of the temperature layers HW and CW of the liquid phase RL, i.e., the collapse of the temperature stratification, and suppresses a decrease in the force of the pressurized container 1 to pump the liquid R out of the container.

[0057] A pressurized container 1 according to an eighth aspect of the present disclosure is the pressurized container 1 according to the sixth aspect, wherein the suppression member 20F is a cylindrical member. According to the present disclosure, in the space partitioned by the suppression member 20F, the maximum distance that the liquid phase RL can move (the maximum distance between the wall surfaces) is smaller than the inner diameter of the container body 10, thereby suppressing sloshing of the liquid R. This suppresses mixing of the temperature layers HW and CW of the liquid phase RL, i.e., collapse of the temperature stratification, and suppresses a decrease in the force of the pressurized container 1 to pump the liquid R out of the container. [Explanation of symbols]

[0058] 1. Pressurized container 2 Heat insulation material 3 Heater section 4 Piping 5 valves 6 Support rod 10 Container body 20 Restraining member SL Slit R liquid VL gas phase RL liquid phase HW temperature layer CW temperature layer TI Thermal Stratification Interface WS water surface Z direction Vertical direction

Claims

1. a container body that stores a liquid with a gas phase in contact with an upper surface of the liquid phase; a suppression member provided in the container body at a position above a temperature stratification interface, which is a boundary surface between a first temperature layer of the liquid phase and a second temperature layer formed below and at a lower temperature than the first temperature layer, and which suppresses sloshing of the liquid; Equipped with Pressurized container.

2. a heater unit attached to the container body to heat the container body, The suppression member is provided above a lower end of the heater unit.

2. The pressurized container of claim 1.

3. The suppression member is attached to the inner wall surface of the container body. The pressurized container according to claim 1 or claim 2.

4. The suppression member is provided over at least a portion of the entire circumferential section of the inner wall surface in the circumferential direction, and a plurality of suppression members are provided side by side in the vertical direction of the container body.

4. The pressurized container of claim 3.

5. The suppression member is a porous structure.

4. The pressurized container of claim 3.

6. the suppression member is a member that extends in the up-down direction of the container body and divides the space inside the container body into a plurality of spaces as viewed in the up-down direction, The plurality of spaces are in communication with each other at locations other than those partitioned by the suppression member.

4. The pressurized container of claim 3.

7. The suppression member is a flat plate-shaped member.

7. The pressurized container of claim 6.

8. The suppression member is a cylindrical member.

7. The pressurized container of claim 6.

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