Material moving type large-scale cold storage device

Abstract

The utility model provides a material moving type large-scale cold storage device which comprises a cold energy exchange channel with an air inlet end and an air outlet end, a material storage bin arranged on the circumferential outer side wall of the cold energy exchange channel, and a porous medium module used for storing cold energy. A heat preservation cavity capable of containing the multiple porous medium modules is formed in the material storage bin and communicates with the interior of the cold energy exchange channel. The material transfer mechanism acts on the porous medium module, so that the porous medium module is switched back and forth between the cold energy exchange channel and the heat preservation cavity, a plurality of holes allowing gas to pass through exist in the porous medium, and during heat exchange, a gas-phase medium in the cold energy heat exchange channel enters the porous medium module from the holes in one end of the porous medium module; the water flows through the interior of the porous medium module and penetrates out of the other opposite end; due to the arrangement of the porous medium module, the heat exchange process is a steady-state process, the thermocline dynamic effect is eliminated, and the running state of the system can be kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of renewable energy and liquid air energy storage, and in particular to a material-mobile large-scale cold storage device. Background Art

[0002] Liquid air energy storage technology is a very promising large-scale energy storage technology due to its high energy storage density, arbitrary deployment and scalability. Among them, the cold storage unit is the core of the liquid air energy storage system and has a profound impact on the system efficiency. Therefore, efficient cold storage technology can effectively promote the development and application of liquid air energy storage technology.

[0003] In addition, the recovery and utilization of cold energy involves all aspects of industrial processes, such as the recovery of LNG cold energy and the utilization of cold energy in VOCs processes. Under the current policy background of peak-valley electricity price differences, the effective storage and utilization of cold energy can not only effectively improve the utilization efficiency of energy, but also has good commercial and economic prospects.

[0004] At present, cold storage technology is mainly divided into liquid phase cold storage technology and solid phase cold storage technology. Liquid phase cold storage technology relies on alkane medium to store cold energy, while solid phase cold storage uses a packed bed filled with solid phase particles to store cold energy. Liquid phase cold storage faces safety risks and high investment problems, while solid phase cold storage faces the problem of reduced efficiency due to the dynamic effect of the thermocline layer. Utility Model Content

[0005] The utility model aims to use a solid phase cold storage medium and propose a cold storage technical solution to overcome the potential safety hazards and high investment problems faced by traditional liquid phase cold storage, and to overcome the problem of reduced efficiency caused by the dynamic effect of the inclined temperature layer faced by traditional solid phase cold storage.

[0006] In order to solve the above technical problems, the utility model provides a material-mobile large-scale cold storage device, which includes: a cold energy exchange channel with an air inlet end and an air outlet end, a material storage bin arranged on the circumferential outer wall of the cold energy exchange channel, a porous medium module for storing cold energy, a heat preservation chamber that can accommodate multiple porous medium modules is arranged in the material storage bin, and the heat preservation chamber is connected with the interior of the cold energy exchange channel; a material transfer mechanism, the material transfer mechanism acts on the porous medium module to move the multiple porous medium modules from the heat preservation chamber to the cold energy exchange channel or from the cold energy exchange channel to the heat preservation chamber, the porous medium module is a three-dimensional geometric structure of a solid medium, and there are many holes inside it that allow gas to pass through. During heat exchange, the axis of the porous medium module coincides with the axis of the cold energy exchange channel, and the gas-phase heat transfer medium in the cold energy heat exchange channel can enter the interior of the porous medium module from the holes at one end, flow through the interior of the porous medium module, and pass out from the other opposite end.

[0007] Furthermore, the heat preservation chamber is arranged in parallel with the cold energy exchange channel, with one end thereof close to the air inlet end of the cold energy exchange channel and the other end close to the air outlet end of the cold energy exchange channel.

[0008] Furthermore, the material transfer mechanism can drive the porous medium module to move perpendicularly to the axis of the cold energy exchange channel, so that the porous medium module moves from the insulation chamber to the cold energy exchange channel or from the cold energy exchange channel to the insulation chamber.

[0009] Furthermore, the insulation chamber is arranged directly above the cold energy exchange channel, and the material transfer mechanism is a linear moving device and an elevator arranged directly above the insulation chamber. The elevator is arranged on the linear moving device, and the elevator moves along the axis of the cold energy exchange channel and the insulation chamber through the linear moving device. The elevator has cables and hooks, and the hook can be connected or separated from the porous medium module through the cooperation of the cable lifting and moving device. After the hook is connected to the porous medium module, the elevator lifting cable moves the porous medium module from the insulation chamber to the cold energy exchange channel or from the cold energy exchange channel to the insulation chamber.

[0010] Furthermore, the insulation chamber is horizontally arranged on one side of the cold energy heat exchange channel, and its axis is on the same horizontal plane as the axis of the cold energy heat exchange channel. The material transfer mechanism is a horizontal moving device arranged on the material storage bin, and the horizontal moving device can drive the porous medium module in the insulation chamber to move in the horizontal direction, so that the porous medium module moves from the insulation chamber to the cold energy exchange channel, or from the cold energy exchange channel to the insulation chamber.

[0011] Furthermore, the linear moving device is a cable arranged just above the heat preservation chamber, and the elevator is slidably connected to the cable.

[0012] Furthermore, two groups of elevators are arranged on the cable, one group is close to the air inlet end of the cold energy exchange channel, and the other group is close to the air outlet end of the cold energy exchange channel.

[0013] Furthermore, the porosity of the porous medium module is between 0.3 and 0.7.

[0014] Furthermore, the porous medium module includes a porous shell and particles filled in the porous shell.

[0015] Furthermore, the particles may be selected from materials such as rocks, metals, and compounds.

[0016] It can be seen from the above technical scheme that the beneficial effects of the utility model are as follows: the gas-solid coupled heat exchange method eliminates the safety hazards caused by the flammable and explosive characteristics of the liquid medium itself, and the setting of the porous medium module makes the heat exchange process a steady-state process, eliminating the dynamic effect of the thermocline layer, and can keep the operating state of the system stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a material-mobile large-scale cold storage device provided in this application. DETAILED DESCRIPTION

[0018] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the above features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0020] In order to further illustrate the principle and structure of the present utility model, the preferred embodiments of the present utility model are now described in detail with reference to the accompanying drawings.

[0021] See also Figure 1, a material mobile large-scale cold storage device provided in this embodiment, including a cold energy exchange channel 5, a material storage bin 4, a porous medium module 3 and a material transfer mechanism, the cold energy exchange channel 5 has an air inlet end and an air outlet end, the gas phase heat transfer medium enters the cold energy exchange channel 5 from the air inlet end, and flows out of the cold energy exchange channel 5 from the air outlet end, the material storage bin is arranged on the circumferential outer side wall of the cold energy heat exchange channel, and a heat preservation chamber is formed in the material storage bin, and the heat preservation chamber is connected with the interior of the cold energy inlet exchange channel, and the porous medium module 3 is a solid phase medium of a three-dimensional geometric structure for storing cold energy. There are many holes inside that allow gaseous media to pass through. The insulation chamber can accommodate multiple porous medium modules 3. Multiple porous medium modules 3 are arranged in the insulation chamber along the axis of the insulation chamber. The insulation chamber can provide insulation for the porous medium modules 3 in a low-temperature state. The material transfer mechanism is used to transfer the porous medium modules 3. When cold storage is required, the material transfer mechanism transfers the porous medium modules 3 at room temperature to the cold energy exchange channel 5. When cold release is required, the material transfer mechanism transfers the low-temperature porous medium modules 3 in the insulation chamber to the cold energy exchange channel 5.

[0022] The above-mentioned insulation chamber is arranged parallel to the cold energy exchange channel 5. When the porous medium module 3 is moved into the cold energy exchange channel 5, the axis of the porous medium module 3 coincides with the axis of the cold energy exchange channel 5. During heat exchange, the gas phase heat transfer medium in the cold energy heat exchange channel can enter the interior of the porous medium module 3 from the holes at one end of the porous medium module 3, flow through the interior of the porous medium module 3, and pass through the other opposite end.

[0023] Furthermore, the axial cross-section of the porous medium module 3 is the same as the axial cross-section of the cold energy exchange channel 5, and the circumferential side wall of the porous medium module 3 is close to or fits the inner wall of the cold energy heat exchange channel to reduce the loss of gas phase heat transfer medium through the gap between the porous medium module 3 and the inner wall of the cold energy exchange channel 5. When the axial cross-section of the cold energy exchange channel 5 is rectangular, the axial cross-section of the porous medium module 3 is also rectangular.

[0024] The material transfer mechanism can drive the porous medium module 3 to move perpendicularly to the axis of the cold energy exchange channel 5, so that the porous medium module 3 moves from the heat preservation chamber into the cold energy exchange channel 5 or from the cold energy exchange channel 5 to the heat preservation chamber.

[0025] Specifically, the material transfer mechanism is a linear moving device and an elevator 1. The elevator 1 can lift or lower the porous medium module 3. The linear moving device is used to change the position of the elevator 1 so that the elevator 1 moves along the axis of the cold energy exchange channel 5 and the insulation chamber. When the material transfer mechanism is the elevator 1, referring to the attached drawings, the material storage bin is arranged above the cold energy exchange channel 5, and the insulation chamber of the material storage bin is arranged directly above the cold energy exchange channel 5. The elevator 1 and the linear moving device are arranged directly above the insulation chamber. The elevator 1 has cables and hooks. The hook can be connected or separated with the porous medium module 3 through the cooperation of the cable lifting and moving device. After the hook is connected with the porous medium module 3, the elevator 1 lifts the cable to move the porous medium module 3 from the insulation chamber to the cold energy exchange channel 5 or from the cold energy exchange channel 5 to the insulation chamber.

[0026] Optionally, when the material transfer mechanism is an elevator 1 , the material storage bin is not limited to being arranged above the cold energy exchange channel, and the material storage bin can also be arranged at the bottom of the cold energy exchange channel 5 .

[0027] Furthermore, the linear moving device may be a cable 2 arranged directly above the heat preservation chamber, and the elevator 1 is slidably connected to the cable 2 .

[0028] Furthermore, two groups of elevators 1 are arranged on the cable 2 , one group is close to the air inlet end of the cold energy exchange channel 5 , and the other group is close to the air outlet end of the cold energy exchange channel 5 .

[0029] Optionally, the material transfer mechanism may also be a horizontal moving device (not shown in the figure) arranged on the material storage bin 4. The horizontal moving device may drive the porous medium module 3 in the insulation chamber to move in the horizontal direction, so that the porous medium module 3 moves from the insulation chamber to the cold energy exchange channel 5, or from the cold energy exchange channel 5 to the insulation chamber. When the material transfer mechanism is a horizontal moving device, the insulation chamber is horizontally arranged on one side of the cold energy heat exchange channel, and its axis is on the same horizontal plane as the axis of the cold energy heat exchange channel. The horizontal moving device may be an existing device that performs driven reciprocating movement in the horizontal direction. The utility model does not involve improvements to the horizontal moving device, and the specific scheme of the horizontal moving device is not described in detail.

[0030] Since only the elevator 1 and the linear moving device are shown in the accompanying drawings of the present invention, only the scheme and process with the elevator 1 and the cable 2 will be described in detail below.

[0031] The utility model provides a material mobile large-scale cold storage device, which uses porous medium solid phase medium as cold storage material and gas-solid coupled heat exchange as technical principle to construct a cold storage system with excellent performance, safety and reliability and low investment cost.

[0032] The utility model provides a material mobile large-scale cold storage device, comprising a lift 1, a cable 2, a porous medium module 3, a material storage bin 4, and a cold energy exchange channel 5, wherein:

[0033] The above-mentioned elevator 1 is a device for lifting the porous medium module 3. Specifically, on the side close to the air inlet end, the elevator 1 continuously lifts the porous medium module 3 from the cold energy exchange channel 5 to the material storage bin 4, and the lifting time interval is adjusted according to the heat exchange rate. On the side close to the air outlet end, the elevator 1 continuously lowers the porous medium from the material storage bin 4 to the cold energy exchange channel 5, and the lowering time interval is adjusted according to the heat exchange rate.

[0034] The lift 1 is mounted on a cable 2 and has cables and hooks, which can lift or lower the porous medium module 3 .

[0035] The cables 2 are used to fix the elevator 1 and enable the elevator 1 to move on the cables 2 to lift or lower the porous medium modules 3 at different positions.

[0036] The porous medium module 3 is a medium for storing cold energy, which is a solid medium and has many holes inside, allowing gas to pass through. In addition, the porous medium module 3 has a uniform and similar shape to simplify the operation and can be operated in a modular manner.

[0037] The porous medium module 3 has various materials to choose from, and generally a medium with high specific heat capacity and low price is selected, and the porosity is generally between 0.3 and 0.7. It can be made of porous medium materials such as rock, ceramic, brick and tile. In addition, a granular medium can also be used to fill the porous shell to form a porous medium module 3, and the granular medium can be selected from materials such as rock, metal, and compound.

[0038] The gas phase heat transfer medium may be of various types, such as single gases such as nitrogen and argon, or mixed gases such as air.

[0039] The material storage bin 4 is a device for storing porous medium modules 3 in a non-heat exchange process, and is mainly used for storing porous medium modules 3 that have completed a cold storage process or a cold release process.

[0040] The material storage bin 4 needs strict thermal insulation, and the thermal insulation material may be polyester-ammonia foam wrapping, pearl sand interlayer filling, etc.

[0041] The cold energy exchange channel 5 is a place where the porous medium module 3 exchanges heat with the gas phase heat transfer medium. During the cold storage process, the porous medium module 3 obtains the cold energy carried by the gas phase heat transfer medium, and during the cold release process, the porous medium module 3 transfers its stored cold energy to the gas phase heat transfer medium.

[0042] In the above-mentioned cold energy exchange channel 5, the gas phase heat transfer medium is in direct contact with the porous medium module 3 for heat transfer, so as to expand the specific surface area of ​​heat transfer and increase the heat transfer efficiency.

[0043] In the above-mentioned cold energy exchange channel 5, the heat exchange process is a steady-state process, and stable gas phase and porous medium outlet temperatures can be obtained under stable gas phase and porous medium inlet temperatures and flow rates. This is conducive to the system working under steady-state conditions and avoiding the influence of non-steady-state characteristics on system performance.

[0044] The following is a further description of a mobile large-scale cold storage system based on medium packaging and transportation provided by the utility model in conjunction with the accompanying drawings.

[0045] During the cold storage process:

[0046] The gas phase heat transfer medium enters the cold energy exchange channel 5 from the right side of the cold energy exchange channel 5 .

[0047] The elevator 1 first lowers a specified number of room-temperature porous medium modules 3 close to the air inlet end from the material storage bin 4 to the cold energy exchange channel 5 in sequence.

[0048] Thereafter, a heat exchange process is carried out, and the gas phase heat transfer medium carrying cold energy transfers the cold energy to the porous medium module 3. When each porous medium module 3 located in the cold energy exchange channel 5 near the air inlet end has been converted into a low-temperature state, the elevator 1 lifts the porous medium module 3 and stores it into the material storage bin 4. At the same time, the elevator lowers the porous medium 3 module at room temperature near the air outlet end from the material storage bin 4 into the cold energy exchange channel 5.

[0049] By continuously performing the above-mentioned heat exchange process, the heat exchange position moves from right to left, and the elevator 1 continuously lowers the porous medium module 3 at room temperature from the material storage bin 4 to the cold energy exchange channel 5 to obtain cold energy, and then changes to a low-temperature state, and then the elevator 1 lifts the low-temperature porous medium module 3 from the cold energy exchange channel 5 to the material storage bin 4 to store the cold energy.

[0050] After the cold storage process is completed, the porous medium module 3 at room temperature is converted into low temperature in the cold energy exchange channel 5 and then stores the cold energy in the material storage bin 4, and the cold storage process is completed.

[0051] During the cooling process:

[0052] The gas phase heat transfer medium enters the cold energy exchange channel 5 from the left side of the cold energy exchange channel 5 .

[0053] The elevator 1 first lowers a specified number of low-temperature porous medium modules 3 close to the air inlet end from the material storage bin 4 to the cold energy exchange channel 5 in sequence.

[0054] After that, the heat exchange process is carried out, and the porous medium module 3 continuously transfers cold energy to the normal temperature gas phase heat transfer medium. When each porous medium module 3 located in the cold energy exchange channel 5 near the air inlet end has been converted to a normal temperature state, the elevator 1 lifts the porous medium module 3 and stores it into the material storage bin 4. At the same time, the elevator lowers the low-temperature porous medium 3 module near the air outlet end from the material storage bin 4 into the cold energy exchange channel 5.

[0055] By continuously performing the above-mentioned heat exchange process, the heat exchange position moves from left to right, and the elevator 1 continuously lowers the porous medium module 3 at room temperature from the material storage bin 4 to the cold energy exchange channel 5 to transfer the cold energy to the gas phase heat transfer medium, and then after it is converted to a room temperature state, the elevator 1 lifts the low-temperature porous medium module 3 from the cold energy exchange channel 5 to the material storage bin 4.

[0056] After the cold release process is completed, the low-temperature porous medium module 3 transfers the cold energy to the gas phase heat transfer medium in the cold energy exchange channel 5 and then returns to the material storage bin 4 for storage. The gas phase heat transfer medium carries the cold energy to the subsequent process, and the cold release process is completed.

[0057] The utility model provides a material-mobile large-scale cold storage device that adopts gas-solid coupled heat exchange. Compared with conventional partition-type heat exchange, it has a large heat exchange specific surface area, can effectively reduce the design size of the heat exchanger, and increase the heat transfer efficiency. Compared with the existing liquid phase cold storage technology, it eliminates the safety hazards caused by the flammable and explosive characteristics of the liquid phase medium itself. Compared with the existing solid phase cold storage technology, the heat exchange process is a steady-state process, which eliminates the dynamic effect of the inclined temperature layer, and can keep the operating state of the system stable. It has a simple structure and uses porous medium materials. It is environmentally friendly and inexpensive, and is easy to industrialize and promote.

[0058] In summary, the material-mobile large-scale cold storage device provided in this application fully guarantees heat exchange efficiency, environmental protection and safety, and is suitable as an optional and highly potential large-scale cold storage technology.

[0059] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A material-mobile large-scale cold storage device, characterized in that: The invention comprises a cold energy exchange channel having an air inlet end and an air outlet end, a material storage bin arranged on the circumferential outer side wall of the cold energy exchange channel, a porous medium module for storing cold energy, a heat preservation chamber for accommodating a plurality of porous medium modules arranged in the material storage bin, the heat preservation chamber being connected with the interior of the cold energy exchange channel; a material transfer mechanism, the material transfer mechanism acts on the porous medium module to move the plurality of porous medium modules from the heat preservation chamber to the cold energy exchange channel or from the cold energy exchange channel to the heat preservation chamber; The porous medium module is a three-dimensional geometric structure of solid medium, and there are many holes inside it that allow gas to pass through. During heat exchange, the axis of the porous medium module coincides with the axis of the cold energy exchange channel. The gas phase heat transfer medium in the cold energy heat exchange channel can enter the porous medium module from the holes at one end, flow through the interior of the porous medium module, and pass through the other opposite end.

2. The material mobile large-scale cold storage device according to claim 1, characterized in that: The heat preservation chamber is arranged in parallel with the cold energy exchange channel, one end of the heat preservation chamber is close to the air inlet end of the cold energy exchange channel, and the other end of the heat preservation chamber is close to the air outlet end of the cold energy exchange channel.

3. The material mobile large-scale cold storage device according to claim 2, characterized in that: The material transfer mechanism can drive the porous medium module to move perpendicularly to the axis of the cold energy exchange channel, so that the porous medium module moves from the heat preservation chamber to the cold energy exchange channel or from the cold energy exchange channel to the heat preservation chamber.

4. The material-mobile large-scale cold storage device according to claim 3 is characterized in that: The insulation chamber is arranged directly above the cold energy exchange channel. The material transfer mechanism is a linear moving device and an elevator arranged directly above the insulation chamber. The elevator is arranged on the linear moving device. The elevator moves along the axis of the cold energy exchange channel and the insulation chamber through the linear moving device. The elevator has cables and hooks. The hook can be connected or separated with the porous medium module through the cooperation of the cable lifting and moving device. After the hook is connected with the porous medium module, the elevator lifting cable moves the porous medium module from the insulation chamber to the cold energy exchange channel or from the cold energy exchange channel to the insulation chamber.

5. The material-mobile large-scale cold storage device according to claim 4, characterized in that: The insulation chamber is horizontally arranged on one side of the cold energy heat exchange channel, and its axis is on the same horizontal plane as the axis of the cold energy heat exchange channel. The material transfer mechanism is a horizontal moving device arranged on the material storage bin, and the horizontal moving device can drive the porous medium module in the insulation chamber to move in the horizontal direction, so that the porous medium module moves from the insulation chamber to the cold energy exchange channel, or from the cold energy exchange channel to the insulation chamber.

6. The material-mobile large-scale cold storage device according to claim 4, characterized in that: The linear moving device is a cable arranged just above the heat preservation chamber, and the elevator is slidably connected to the cable.

7. The material-mobile large-scale cold storage device according to claim 6, characterized in that: Two groups of elevators are arranged on the cable, one group is close to the air inlet end of the cold energy exchange channel, and the other group is close to the air outlet end of the cold energy exchange channel.

8. The material-mobile large-scale cold storage device according to claim 1, characterized in that: The porosity of the porous media module is between 0.3 and 0.

7.

9. The material-mobile large-scale cold storage device according to claim 8, characterized in that: The porous medium module comprises a porous shell and particles filled in the porous shell.

10. The material-mobile large-scale cold storage device according to claim 8, characterized in that: The particles are any of rock, metal, and compound substances.

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