Water distribution type phase change energy storage tank

Abstract

The utility model provides a water distribution type phase change energy storage tank which solves the problems that contact between phase change heat storage pipes (heat exchange pipes) and media to be subjected to heat exchange is not uniform, and the heat exchange efficiency is low. The water distribution type phase change energy storage tank comprises a tank body, phase change heat storage pipes and a water distributor, the upper end and the lower end of the tank body are provided with an upper communication opening and a lower communication opening which are communicated with an inner cavity of the tank body respectively, the number of the phase change heat storage pipes is two or more, a pipe gap exists between every two adjacent phase change heat storage pipes, and the water distributor is located above and / or below the phase change heat storage pipes; the water distributor comprises a water distribution pipe, through holes are densely distributed in the water distribution pipe, and a fluid medium entering the tank body from the upper communication port or the lower communication port can enter the corresponding water distributor, flow out of the through holes of the water distribution pipe and then penetrate through pipe gaps; the water distributor achieves the effect of uniform water flow of water outlet and water inlet, so that disturbance of the water surface of the system is avoided, and the temperature gradient disorder phenomenon is avoided; according to the water distribution type phase change energy storage tank, heat exchange between a fluid medium and the phase change heat storage pipes is uniform, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat storage devices, in particular to a water distribution type phase change energy storage tank. Background Art

[0002] Phase-change energy storage devices (PCESs) utilize phase transitions to store and release energy. These devices are increasingly used in residential buildings, particularly in utilizing off-peak electricity and solar thermal energy, demonstrating significant potential and value. PCESs not only effectively conserve energy and improve efficiency, but also regulate energy use to a certain extent, thereby achieving energy conservation and emission reduction goals.

[0003] The packaging volume of the phase change heat storage tube (heat exchange tube) in the prior art is generally about 1.5 meters, and is thrown into the water tank in an unorganized manner.

[0004] The applicant has found that the prior art has at least the following technical problems: the phase change heat storage tubes in the prior art have uneven heat exchange and water contact surfaces, and some phase change heat storage tubes (heat exchange tubes) cannot effectively perform phase change heat storage, or have the disadvantage of a long heat exchange time. Utility Model Content

[0005] The purpose of the present invention is to provide a water-distributed phase-change energy storage tank to solve the technical problems in the prior art of uneven contact between the phase-change heat storage tube (heat exchange tube) and the heat exchange medium to be exchanged, resulting in low heat exchange efficiency; the various technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The utility model provides a water-distributing phase-change energy storage tank, comprising a tank body, a phase-change heat storage tube located inside the tank body, and a water distributor, wherein:

[0008] The upper and lower ends of the tank body are respectively provided with an upper communication port and a lower communication port connected to the inner cavity of the tank body, the number of the phase change heat storage tubes is two or more, there is a tube gap between adjacent phase change heat storage tubes, and the water distributor is located above and / or below the phase change heat storage tubes;

[0009] The water distributor includes a water distribution pipe, which is densely covered with through holes. The fluid medium entering the tank body through the upper connecting port or the lower connecting port can enter the corresponding water distributor, and can flow out from the through holes of the water distribution pipe and pass through the pipe gap.

[0010] Preferably, the water distribution pipe includes a main pipe and a straight pipe, wherein:

[0011] The mother pipe is communicated with the upper communication port or the lower communication port, all the straight pipes are connected with the mother pipe, the straight pipes are arranged horizontally, and the through holes are densely distributed on the straight pipes.

[0012] Preferably, the mother pipe and the straight pipe are perpendicular to each other, and the mother pipe is connected with a connecting pipe portion.

[0013] Preferably, the water distributor includes an upper water distributor and a lower water distributor, the upper water distributor is located above all the phase-change heat storage tubes, and the lower water distributor is located below all the phase-change heat storage tubes.

[0014] Preferably, a support isolation structure is fixed in the tank body, and the support isolation structure includes a support rod or a support plate. An accommodation space is constructed between adjacent support rods or support plates, and the phase change heat storage tube is inserted into the corresponding accommodation space. One or more phase change heat storage tubes are inserted in each accommodation space.

[0015] Preferably, at least two supporting isolation structures are provided, which are respectively located at the upper part and the lower part of the phase-change heat storage tube.

[0016] Preferably, the inner ring of the tank body is fixed with a supporting inner eave, and the supporting isolation structure is erected on the corresponding supporting inner eave;

[0017] And / or, a support grid is fixed to the inner circle of the tank body, and the support isolation structure is erected on the corresponding support grid.

[0018] Preferably, a maintenance space is provided in the tank body, and the maintenance space is located in the middle of the tank body, and all the phase change heat storage tubes are evenly spaced around the maintenance space.

[0019] Preferably, a porous plate is provided at the bottom of the tank body, and the porous plate is used for allowing the fluid medium to pass through, and the porous plate supports the bottom of the phase-change heat storage tube.

[0020] Preferably, a manhole cover is provided on the upper portion of the tank body, and an exhaust pipe is provided on the manhole cover;

[0021] A sewage pipe is provided at the bottom of the tank body, and the sewage pipe is communicated with the inner cavity of the tank body.

[0022] Compared with the prior art, the water-distributing phase-change energy storage tank provided by the present invention has the following beneficial effects: the fluid medium entering the tank body from the upper connecting port or the lower connecting port can enter the corresponding water distributor, and can flow out from the through-hole of the water distribution pipe and pass through the gap between the pipes, thereby exchanging heat with the phase-change heat storage pipe; the phase-change heat storage material is stored in the phase-change heat storage pipe, and the phase change temperature of the phase-change heat storage material is selected according to the heat storage temperature. According to the solid-liquid phase change heat absorption and heat release, energy is stored in the phase-change material within a set time, and then the energy stored in the phase-change material is released within a set time. The water distributor ensures that the water flow at the outlet and inlet is uniform, so as not to cause disturbances on the water surface of the system and cause temperature gradient chaos; the fluid medium of the water-distributing phase-change energy storage tank is evenly distributed, and the fluid medium and the phase-change heat storage pipe exchange heat evenly, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of the water-distributed phase-change energy storage tank;

[0025] Figure 2 It is a structural diagram of the water distributor;

[0026] Figure 3 It is a top view schematic diagram of the tank;

[0027] Figure 4 Schematic diagram of the cross-sectional structure of the phase change heat storage tube;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure at the porous plate.

[0029] In the figure, 1. Phase change heat storage tube; 2. Support rod; 3. Perforated plate; 4. Support grid; 5. Upper water distributor; 6. Lower water distributor; 7. Connecting pipe; 8. Tank body; 9. Drain pipe; 10. Bottom plate; 11. Support inner eaves; 12. Water supply hole; 13. Straight pipe; 14. Main pipe; 15. Manhole cover; 16. Exhaust pipe; 17. Ladder; 18. Maintenance space. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center," "length," "width," "height," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and "side" and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] The embodiment of the utility model provides a water-distributed phase-change energy storage tank, in which the fluid medium is evenly distributed, and the fluid medium and the phase-change heat storage tube exchange heat evenly, thereby improving the heat exchange efficiency.

[0034] The following combination Figure 1-Figure 5 The technical solution provided by the utility model is described in more detail.

[0035] like Figure 1-Figure 5 As shown, the water-distributing phase-change energy storage tank provided by the present invention comprises a tank body 8, a phase-change heat storage tube 1 located in the tank body 8, and a water distributor, wherein: the upper and lower ends of the tank body 8 are respectively provided with an upper connecting port and a lower connecting port connected to the inner cavity of the tank body 8, the number of the phase-change heat storage tubes 1 is more than two, there is a tube gap between adjacent phase-change heat storage tubes 1, and the water distributor is located above and / or below the phase-change heat storage tube 1; the water distributor comprises a water distribution pipe, which is densely covered with through holes, and the fluid medium entering the tank body 8 from the upper connecting port or the lower connecting port can enter the corresponding water distributor, and can flow out from the through holes of the water distribution pipe and pass through the tube gap.

[0036] Phase-change thermal storage tube 1 stores a phase-change thermal storage material, such as fatty acids, crystalline hydrated salts, or molten salts, as is conventionally known in the art and is not limited here. The phase-change thermal storage material is stored in phase-change thermal storage tube 1. The phase change temperature of the phase-change thermal storage material is selected based on the thermal storage temperature. Energy is stored in the phase-change thermal storage material within a set time period based on the heat absorption and release of the solid-liquid phase transition. The energy stored in the phase-change material is then released within the set time period.

[0037] The phase change heat storage material can be low temperature heat storage material or high temperature heat storage material, so that the heat storage temperature is between 8°C and 60°C. The phase change heat storage tube 1 is a stainless steel tube or a thin-walled aluminum alloy tube, and the length is adjusted according to the height of the water tank (1.0m to 6.0m).

[0038] The water-distributed phase-change energy storage tank can be used to heat or cool a fluid medium. The following description assumes water as the fluid medium. Low-temperature water can enter the tank body 8 through the lower connecting hole and flow upward. High-temperature water can enter the tank body 8 through the upper connecting hole and flow downward. During this flow, the water passes through the gaps between adjacent phase-change thermal storage tubes 1, exchanging heat with them.

[0039] In the water-distributing phase-change energy storage tank of this embodiment, the fluid medium enters the tank body 8 from the upper connecting port or the lower connecting port, can enter the corresponding water distributor, and can flow out from the through hole of the water distribution pipe and pass through the pipe gap, thereby exchanging heat with the phase-change heat storage pipe 1; the water distributor plays a role in uniform water outflow and water inflow, so as not to cause disturbance of the water surface of the system and cause temperature gradient chaos; the fluid medium of the water-distributing phase-change energy storage tank is evenly distributed, and the fluid medium and the phase-change heat storage pipe 1 are evenly exchanged, thereby improving the heat exchange efficiency.

[0040] As an alternative embodiment, see Figure 1 and Figure 2 As shown, the water distribution pipe includes a main pipe 14 and straight pipes 13, wherein: the main pipe 14 is connected to the upper connecting port or the lower connecting port, and all straight pipes 13 are connected to the main pipe 14. The straight pipes 13 are arranged horizontally, and the through holes are densely distributed on the straight pipes 13. The main pipe 14 and the straight pipes 13 are perpendicular to each other, and the main pipe 14 is connected to the connecting pipe portion 7.

[0041] See also Figure 1 As shown, the water distributor of this embodiment includes an upper water distributor 5 and a lower water distributor 6 . The upper water distributor 5 is located above all phase-change heat storage tubes 1 , and the lower water distributor 6 is located below all phase-change heat storage tubes 1 .

[0042] The aforementioned "upper communication port" can be located in the upper portion of the tank's outer shell, or at the inlet of the main pipe 14 in the upper water distributor 5. The aforementioned "lower communication port" can be located in the lower portion of the tank's outer shell, or at the inlet of the main pipe 14 in the lower water distributor 6. External water enters the main pipe 14 of the upper water distributor 5 through the upper communication port, where it is then diverted to each of the straight tubes 13. Water then flows evenly through the inter-tube gaps between the phase-change thermal storage tubes 1 through the water replenishment holes 12 on the straight tubes 13, thereby exchanging heat with the phase-change thermal storage tubes 1.

[0043] Alternatively, external water enters the main pipe 14 of the lower water distributor 6 from the lower connecting port, is diverted from the main pipe 14 to each straight pipe 13, and evenly passes through the tube gaps between the phase change heat storage tubes 1 from the water supply holes 12 on the straight tubes 13, thereby exchanging heat with the phase change heat storage tubes 1.

[0044] The water distributor can be of circular ring type, plate type, branch plate type, or double helix curve type.

[0045] As an alternative embodiment, see Figure 1 and Figure 4 As shown, a support isolation structure is fixed in the tank body 8, and the support isolation structure includes a support rod 2 or a support plate. There is a receiving space between adjacent support rods 2 or support plates, and the phase change heat storage tube 1 is inserted into the corresponding receiving space (such as Figure 4 As shown), one or more phase-change heat storage tubes 1 are inserted into each accommodation space.

[0046] See also Figure 1 As shown, in this embodiment, at least two supporting isolation structures are provided, which are respectively located at the upper and lower parts of the phase change heat storage tube 1. Figure 4 As shown, a supporting inner eave 11 is fixed to the inner circle of the tank body 8 , and the supporting isolation structure located at the upper inner part of the tank body 8 is erected on the corresponding supporting inner eave 11 .

[0047] See also Figure 4 As shown, all phase-change heat storage tubes 1 are arranged vertically and supported by upper and lower support isolation structures, so that the tube gaps between adjacent phase-change heat storage tubes 1 are uniform in size, ensuring uniform heat exchange.

[0048] As an alternative embodiment, see Figure 1 As shown, there are at least two supporting isolation structures, which are respectively located at the upper part and the lower part of the phase-change heat storage tube 1 .

[0049] The phase-change heat storage tubes 1 can ensure stability under the support limit of the support isolation structure, and the tube gaps between the phase-change heat storage tubes 1 are of the same size, which facilitates improving the uniformity of heat exchange.

[0050] As an alternative embodiment, see Figure 1 As shown, a support grid 4 is fixed to the inner circle of the tank body 8 , and the support isolation structure is erected on the corresponding support grid 4 .

[0051] The supporting isolation structure located at the lower inner portion of the tank body 8 is erected on the corresponding supporting grid 4, which is convenient for fixation and can improve the stability of the structure.

[0052] As an alternative embodiment, see Figure 4 As shown, a maintenance space 18 is provided in the tank body 8 , and the maintenance space 18 is located in the middle of the tank body 8 , and all the phase change heat storage tubes 1 are evenly spaced around the maintenance space 18 .

[0053] The maintenance space inside the tank body 8 is convenient for maintenance personnel to inspect and repair, and is convenient for maintenance inside the tank body 8.

[0054] As an alternative embodiment, see Figure 1 As shown, a porous plate 3 is provided at the bottom of the tank body 8 , and the porous plate 3 is used for allowing the fluid medium to pass through, and the porous plate 3 supports the bottom of the phase-change heat storage tube 1 .

[0055] The porous plate 3 plays a supporting role, and water can pass through the porous plate 3 without affecting the normal heat exchange between water and the phase-change heat storage tube 1 .

[0056] As an alternative embodiment, see Figure 1 As shown, the upper portion of the tank body 8 is provided with a manhole cover 15, on which an exhaust pipe 16 is installed. The bottom of the tank body 8 is sealed by a bottom plate 10, and a sewage pipe 9 is provided at the bottom of the tank body 8. The sewage pipe 9 is connected to the inner cavity of the tank body 8 for discharging dirt. The tank body 8 is provided with a ladder 17 to facilitate maintenance personnel to reach the top of the tank body 8.

[0057] In this embodiment of the water-distributed phase-change energy storage tank, when low-temperature water needs to be heated, the low-temperature water can enter the tank body 8 through the lower connecting hole, flowing upward from bottom to top. During this flow, the water passes through the gaps between adjacent phase-change thermal storage tubes 1, exchanging heat with the phase-change thermal storage tubes 1. When high-temperature water needs to be cooled, the high-temperature water can enter the tank body 8 through the upper connecting hole, flowing downward from top to bottom. During this flow, the water passes through the gaps between adjacent phase-change thermal storage tubes 1, exchanging heat with the phase-change thermal storage tubes 1.

[0058] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A water distribution type phase change energy storage tank, characterized in that: It includes a tank body, a phase-change heat storage tube located inside the tank body, and a water distributor, wherein: The upper and lower ends of the tank body are respectively provided with an upper communication port and a lower communication port connected to the inner cavity of the tank body, the number of the phase change heat storage tubes is two or more, there is a tube gap between adjacent phase change heat storage tubes, and the water distributor is located above and / or below the phase change heat storage tubes; The water distributor includes a water distribution pipe, which is densely covered with through holes. The fluid medium entering the tank body through the upper connecting port or the lower connecting port can enter the corresponding water distributor, and can flow out from the through holes of the water distribution pipe and pass through the pipe gap.

2. The water-distributed phase-change energy storage tank according to claim 1, characterized in that: The water distribution pipe includes a main pipe and a straight pipe, wherein: The mother pipe is communicated with the upper communication port or the lower communication port, all the straight pipes are connected with the mother pipe, the straight pipes are arranged horizontally, and the through holes are densely distributed on the straight pipes.

3. The water-distributed phase-change energy storage tank according to claim 2, characterized in that: The mother pipe and the straight pipe are perpendicular to each other, and the mother pipe is connected with a connecting pipe portion.

4. The water-distributed phase-change energy storage tank according to claim 1, characterized in that: The water distributor includes an upper water distributor and a lower water distributor. The upper water distributor is located above all the phase-change heat storage tubes, and the lower water distributor is located below all the phase-change heat storage tubes.

5. The water-distributed phase-change energy storage tank according to claim 1, characterized in that: A support isolation structure is fixed inside the tank body, and the support isolation structure includes support rods or support plates. Accommodation spaces are constructed between adjacent support rods or support plates. The phase change heat storage tubes are inserted into the corresponding accommodation spaces, and one or more phase change heat storage tubes are inserted in each accommodation space.

6. The water-distributed phase-change energy storage tank according to claim 5, characterized in that: At least two supporting and isolating structures are provided, which are respectively located at the upper part and the lower part of the phase-change heat storage tube.

7. The water-distributed phase-change energy storage tank according to claim 5, characterized in that: The inner ring of the tank body is fixed with a supporting inner eave, and the supporting isolation structure is erected on the corresponding supporting inner eave; And / or, a support grid is fixed to the inner circle of the tank body, and the support isolation structure is erected on the corresponding support grid.

8. The water-distributed phase-change energy storage tank according to claim 1, characterized in that: A maintenance space is provided in the tank body, and the maintenance space is located in the middle of the tank body. All the phase-change heat storage tubes are evenly spaced around the maintenance space.

9. The water-distributed phase-change energy storage tank according to claim 1, characterized in that: A porous plate is provided at the bottom of the tank body, and the porous plate is used for allowing the fluid medium to pass through, and the porous plate supports the bottom of the phase-change heat storage tube.

10. The water-distributed phase-change energy storage tank according to claim 1, characterized in that: A manhole cover is provided on the upper portion of the tank body, and an exhaust pipe is provided on the manhole cover; A sewage pipe is provided at the bottom of the tank body, and the sewage pipe is communicated with the inner cavity of the tank body.

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