Material moving type large-scale cold storage device

Abstract

The invention 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 porous medium modules used for storing cold energy. The heat preservation cavity 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 present invention relates to the technical fields of renewable energy and liquid air energy storage, and particularly relates to a material mobile large-scale cold energy storage device. Background Art

[0002] Due to its high energy storage density, arbitrary deployment and scalability, the liquid air energy storage technology is a very promising large-scale energy storage technology. Among them, the cold energy storage unit is the core of the liquid air energy storage system, which deeply affects the system efficiency. Therefore, an efficient cold energy storage technology can effectively promote the development and application of the 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 the VOCs process. Under the current policy background of the peak-valley electricity price difference, the effective storage and utilization of cold energy can not only effectively improve the energy utilization efficiency, but also have good commercial and economic prospects.

[0004] At present, the cold energy storage technology is mainly divided into liquid-phase cold energy storage technology and solid-phase cold energy storage technology. The liquid-phase cold energy storage technology relies on alkane media for cold energy storage, while the solid-phase cold energy storage uses a packed bed filled with solid-phase particles for cold energy storage. The liquid-phase cold energy storage faces the problems of safety hazards and high investment, and the solid-phase cold energy storage faces the problem of reduced efficiency caused by the dynamic effect of the thermocline. Summary of the Invention

[0005] The invention purpose of the present invention is to use a solid-phase cold energy storage medium and propose a cold energy storage technical solution to overcome the safety hazards and high investment problems faced by traditional liquid-phase cold energy storage, and to overcome the problem of reduced efficiency caused by the dynamic effect of the thermocline faced by traditional solid-phase cold energy storage.

[0006] To solve the above technical problems, the present invention provides a material mobile large-scale cold energy storage device, which includes: a cold energy exchange channel having 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 capable of accommodating a plurality of porous medium modules is arranged in the material storage bin, and the heat preservation chamber is internally communicated with the cold energy exchange channel; a material transfer mechanism, the material transfer mechanism acts on the porous medium module to move a 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 a solid-phase medium, and there are many holes allowing gas to pass through inside. During heat exchange, the axis of the porous medium module coincides with the axis of the cold energy exchange channel, and the gas heat transfer medium in the cold energy exchange channel can enter the inside of the porous medium module from the holes at one end of the porous medium module, flow through the inside of the porous medium module, and exit from the opposite end.

[0007] Furthermore, the heat preservation chamber is arranged in parallel with the cold energy exchange channel, with one end 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 perpendicular to the axis of the cold energy exchange channel, so that the porous medium module moves from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation chamber.

[0009] Furthermore, the heat preservation chamber is arranged directly above the cold energy exchange channel. The material transfer mechanism is a linear moving device and a lift arranged directly above the heat preservation chamber. The lift is arranged on the linear moving device and can move along the axis of the cold energy exchange channel and the heat preservation chamber through the linear moving device. The lift is equipped with a cable and a hook. The hook can be connected or separated from the porous medium module through the cooperation of the cable lifting and the moving device. After the hook is connected to the porous medium module, the lift lifts the cable to move the porous medium module from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation chamber.

[0010] Furthermore, the heat preservation 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. The horizontal moving device can drive the porous medium module in the heat preservation chamber to move horizontally, so that the porous medium module moves from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation chamber.

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

[0012] Furthermore, two sets of lifts are arranged on the cable, one set is close to the air inlet end of the cold energy exchange channel, and the other set 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 outer shell and particles filled in the porous outer shell.

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

[0016] As can be seen from the above technical solutions, the beneficial effects of the present invention are as follows: The gas-solid coupling heat exchange method eliminates the potential safety hazards caused by the flammable and explosive characteristics of the liquid phase medium itself. Moreover, the setting of the porous medium module makes the heat exchange process a steady-state process, eliminates the dynamic effect of the thermocline, and can keep the operation state of the system stable. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of a material mobile large-scale cold storage device provided by this application. Detailed implementation manners

[0018] Typical implementation manners reflecting 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 implementation manners, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are for illustrative purposes in essence and are not used to limit the present invention.

[0019] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this 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, so it cannot be understood as a limitation to this 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 quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the above features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0020] To further illustrate the principle and structure of the present invention, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] Please refer to Figure 1, A material mobile large-scale cold storage device provided for this embodiment includes 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 wall of the cold energy heat exchange channel, and a heat preservation chamber is formed inside the material storage bin. The heat preservation chamber is internally communicated with the cold energy inlet exchange channel. The porous medium module 3 is a three-dimensional geometric structure of a solid phase medium for storing cold energy, and there are numerous holes inside it that allow the gas-phase medium to pass through. The heat preservation chamber can accommodate multiple porous medium modules 3, and the multiple porous medium modules 3 are arranged along the axis of the heat preservation chamber in the heat preservation chamber. The heat preservation chamber can provide heat preservation for the porous medium module 3 in a low-temperature state. The material transfer mechanism is used to transfer the porous medium module 3. When cold storage is required, the material transfer mechanism transfers the porous medium module 3 at normal temperature into the cold energy exchange channel 5. When cold release is required, the material transfer mechanism transfers the low-temperature porous medium module 3 in the heat preservation chamber into the cold energy exchange channel 5.

[0022] The above heat preservation 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 inside of the porous medium module 3 from the holes at one end of the porous medium module 3, flow through the inside of the porous medium module 3, and exit from the 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 in contact with the inner wall of the cold energy heat exchange channel to reduce the loss of the 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 above material transfer mechanism can drive the porous medium module 3 to move perpendicular to the axis of the cold energy exchange channel 5, so that the porous medium module 3 moves from the heat preservation chamber to the cold energy exchange channel 5 or from the cold energy exchange channel 5 to the heat preservation chamber.

[0025] Specifically, the above-mentioned material transfer mechanism is a linear moving device and a lift 1. The lift 1 can lift or lower the porous medium module 3. The linear moving device is used to change the position of the lift 1 so that the lift 1 moves along the axis of the cold energy exchange channel 5 and the insulation chamber. When the material transfer mechanism is the lift 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 lift 1 and the linear moving device are arranged directly above the insulation chamber. The lift 1 has a cable and a hook. The hook can be lifted and lowered through the cable and connected or separated from the porous medium module 3 in cooperation with the moving device. After the hook is connected to the porous medium module 3, the lift 1 lifts and lowers the cable to move the porous medium module 3 from the insulation chamber into the cold energy exchange channel 5 or from the cold energy exchange channel 5 into the insulation chamber.

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

[0027] Furthermore, the above-mentioned linear moving device can be a cable 2 arranged directly above the insulation chamber, and the lift 1 is slidably connected to the cable 2.

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

[0029] Optionally, the above-mentioned material transfer mechanism can also be a horizontal moving device (not shown in the figure) arranged on the material storage bin 4. The horizontal moving device can drive the porous medium module 3 in the insulation chamber to move horizontally, 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 the 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 can be an existing device that makes a driving reciprocating movement in the horizontal direction. The present invention does not involve the improvement of the horizontal moving device, and the specific scheme of the horizontal moving device will not be described in detail.

[0030] Since only the lift 1 and the linear moving device are shown in the attached drawings of the present invention, the following will only describe in detail the scheme and process in which the lift 1 and the cable 2 exist.

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

[0032] The present invention provides a material mobile large-scale cold energy storage device, including 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 lift 1 is a device used to lift and lower the porous medium module 3. Specifically, on one side close to the intake end, the lift 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 outlet end, the lift 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 above-mentioned lift 1 is installed on the cable 2, and it has a cable and a hook, which can lift or lower the porous medium module 3.

[0035] The above-mentioned cable 2 is used to fix the lift 1 and enable the lift 1 to move on the cable 2 to lift or lower the porous medium module 3 at different positions.

[0036] The above-mentioned porous medium module 3 is a medium for storing cold energy. It is a solid-phase medium with numerous pores inside, allowing gas to pass through. In addition, the above-mentioned porous medium module 3 has a uniform and similar shape, making the operation simple and allowing modular operation.

[0037] The material of the above-mentioned porous medium module 3 can be selected in various ways. Generally, a medium with a high specific heat capacity and low price is selected, and the porosity is generally between 0.3 and 0.7. It can use porous medium materials such as rocks, ceramics, and bricks and tiles. In addition, granular media can also be filled into a porous outer shell to form the porous medium module 3. The above-mentioned granular media can be selected from substances such as rocks, metals, and compounds.

[0038] There can be various types of the above-mentioned gas-phase heat transfer media, such as single gases like nitrogen and argon, or mixed gases like air.

[0039] The above-mentioned material storage bin 4 is a device for storing the porous medium module 3 during the non-heat exchange process, and it is mainly used to store the porous medium module 3 that has completed the cold energy storage process or the cold energy release process.

[0040] The above-mentioned material storage bin 4 requires strict heat insulation, and the heat insulation material can be selected such as being wrapped with polyurethane foam or filled with perlite sand interlayer.

[0041] The above-mentioned 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 energy storage process, the porous medium module 3 obtains the cold energy carried by the gas-phase heat transfer medium therein. During the cold energy release process, the porous medium module 3 transfers the 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 directly contacts and transfers heat with the porous medium module 3 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. Under the stable gas-phase and porous medium inlet temperatures and flow rates, stable gas-phase and porous medium outlet temperatures can be obtained. This is conducive to the system operating under steady-state conditions and avoiding the influence of non-steady-state characteristics on the system performance.

[0044] The following further describes a mobile large-scale cold energy storage system based on medium encapsulation and transportation provided by the present invention with reference to the accompanying drawings.

[0045] During the cold energy 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 sequentially lowers a specified number of normal-temperature porous medium modules 3 near the air inlet end from the material storage bin 4 into the cold energy exchange channel 5.

[0048] Thereafter, a heat exchange process is carried out. 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 near the air inlet end located in the cold energy exchange channel 5 has been transformed into a low-temperature state, the elevator 1 raises the porous medium module 3 and stores it in the material storage bin 4. At the same time, the elevator lowers the normal-temperature porous medium module 3 near the air outlet end from the material storage bin 4 into the cold energy exchange channel 5.

[0049] By continuously carrying out the above heat exchange process, the heat exchange position shifts from right to left. The elevator 1 continuously lowers the normal-temperature porous medium module 3 from the material storage bin 4 into the cold energy exchange channel 5 to obtain cold energy, and then after being transformed into a low-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 to store the cold energy.

[0050] After the cold energy storage process ends, the normal-temperature porous medium module 3 is transformed into a low temperature in the cold energy exchange channel 5 and stores the cold energy in the material storage bin 4, and the cold energy storage process is completed.

[0051] During the cold energy release 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 sequentially lowers a specified number of low-temperature porous medium modules 3 near the air inlet end from the material storage bin 4 into the cold energy exchange channel 5.

[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 in 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 cold energy to the gas phase heat transfer medium. Then, after the temperature is converted to room temperature, 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 material-mobile large-scale cold storage device provided by the present invention adopts gas-solid coupled heat exchange. Compared with conventional partition-type heat exchange, it has a large heat exchange specific surface area, which 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 properties of the liquid 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 temperature gradient layer, and can keep the system's operating state stable. It has a simple structure and uses porous medium materials, which is environmentally friendly and low-cost, 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] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A material-mobile large-scale cold storage device, characterized in that, It 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 arranged in the material storage bin and capable of accommodating a plurality of porous medium modules, and the heat preservation chamber is internally communicated with the cold energy exchange channel; a material transfer mechanism, which acts on the porous medium module to move a plurality of porous medium modules from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation chamber. The porous medium module is a three-dimensional geometric structure of a solid phase medium, and there are numerous 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 heat transfer medium in the cold energy heat exchange channel can enter its interior from the holes at one end of the porous medium module, flow through the interior of the porous medium module, and exit from the opposite end.

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

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 perpendicular to the axis of the cold energy exchange channel, so that the porous medium module moves from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation chamber.

4. The material mobile large-scale cold storage device according to claim 3, wherein, The heat preservation chamber is arranged directly above the cold energy exchange channel. The material transfer mechanism is a linear moving device and a lift arranged directly above the heat preservation chamber. The lift is arranged on the linear moving device, and the lift moves along the axes of the cold energy exchange channel and the heat preservation chamber through the linear moving device. The lift has a cable and a hook. The hook can be connected or separated from the porous medium module through the cooperation of the cable lifting and the moving device. After the hook is connected to the porous medium module, the lift lifts the cable to move the porous medium module from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation chamber.

5. The material mobile large-scale cold storage device according to claim 4, wherein, The heat preservation 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 heat preservation chamber to move in the horizontal direction, so that the porous medium module moves from the heat preservation chamber into the cold energy exchange channel or from the cold energy exchange channel into the heat preservation 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 directly above the heat preservation chamber, and the lift is slidably connected to the cable.

7. The material mobile large-scale cold storage device according to claim 6, characterized in that, There are two groups of lifts 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 mobile material large-scale cold storage device according to claim 1, characterized in that The porosity of the porous medium 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 includes a porous outer shell and particles filled in the porous outer shell.

10. The material mobile large-scale cold storage device according to claim 8, characterized in that, The particles can be selected from substances such as rock type, metal type, compound type, etc.

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