Modularized coil pipe type phase change energy storage heat exchanger

Abstract

The utility model relates to the technical field of energy storage heat exchangers, in particular to a modularized coil pipe type phase change energy storage heat exchanger which comprises a top end energy storage box, heat insulation supporting plates are fixedly installed in the middles of the interiors of the top end energy storage box, a middle energy storage box and a bottom end energy storage box, and a plurality of coil pipe type heat exchange pipes are arranged in the heat insulation supporting plates in a penetrating mode. Fins are fixedly connected to the pipe wall of the coil pipe type heat exchange pipe, and a first fluid inlet and outlet pipe communicating with the coil pipe type heat exchange pipe is fixedly installed on the outer wall of the front end of the top end energy storage box. The detachable multi-layer structure is adopted, more middle energy storage boxes can be additionally arranged between the first fluid inlet and outlet pipe and the second fluid inlet and outlet pipe, and the number of the middle energy storage boxes and the types of internal phase-change materials can be freely selected, regulated and controlled according to energy storage and heat exchange requirements; in the maintenance period, the energy storage boxes are independent, so that the energy storage boxes can be conveniently and directly maintained in a replacement mode, and the maintenance time and cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage heat exchangers, in particular to a modular coil-type phase-change energy storage heat exchanger. Background Art

[0002] In the field of heat exchange technology, an energy storage heat exchanger is a device that uses phase change or heat conduction to absorb, store, and release thermal energy. It can store heat when energy supply is in excess and release it when energy demand peaks, thereby achieving efficient energy management and utilization.

[0003] The operating principle of a coil-type phase-change energy storage heat exchanger is primarily based on the heat conduction of the coil wall and the energy storage properties of the phase-change material. During the heat exchange process, hot and cold media flow through the pipes within the coil and exchange heat with the phase-change material outside the coil. As the phase-change material absorbs or releases heat, it undergoes phase changes, such as solid-to-liquid or liquid-to-gas, thereby storing or releasing large amounts of thermal energy. The performance of the energy storage heat exchanger directly affects the energy efficiency and stability of the entire system.

[0004] Traditional energy storage heat exchangers are bulky and complex to maintain, making them difficult to modularize, enabling energy storage and release through heat exchange between built-in coil-type heat exchange channels and phase change materials. Therefore, developing a modular, easy-to-maintain energy storage heat exchanger has become a key research direction in the field of heat exchange technology. Summary of the Invention

[0005] The purpose of the present utility model is to provide a modular coil-type phase-change energy storage heat exchanger, which adopts a detachable multi-layer structure. More intermediate energy storage boxes can be added between the first fluid inlet and outlet pipes and the second fluid inlet and outlet pipes. The number of intermediate energy storage boxes and the type of internal phase change materials can be freely selected and regulated according to the energy storage and heat exchange requirements. During maintenance, the energy storage boxes are independent of each other, which facilitates direct replacement and substitution for maintenance, saving maintenance time and cost, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a modular coil-type phase change energy storage heat exchanger, comprising a top energy storage box, a middle energy storage box being detachably mounted on the lower end of the top energy storage box, a bottom energy storage box being detachably mounted on the lower end of the middle energy storage box, a heat insulation support plate being fixedly mounted at the middle position inside the top energy storage box, the middle energy storage box, and the bottom energy storage box, a plurality of coil-type heat exchange tubes being passed through the interior of the heat insulation support plate, fins being fixedly connected to the tube walls of the coil-type heat exchange tubes, a first fluid inlet and outlet pipe being fixedly mounted on the front end outer wall of the top energy storage box, and a second fluid inlet and outlet pipe being fixedly mounted on the front end outer wall of the bottom energy storage box.

[0007] Preferably, a filling hole is opened in the middle position of the front end surface of the top energy storage box, the middle energy storage box and the bottom energy storage box, and the interiors of the top energy storage box, the middle energy storage box and the bottom energy storage box are all filled with phase change material through the filling hole.

[0008] Preferably, positioning columns are fixedly installed at the four corners of the bottom ends of the top energy storage box and the middle energy storage box, and fitting holes are opened at the four corners of the top ends of the middle energy storage box and the bottom energy storage box corresponding to the positioning columns.

[0009] Preferably, the coil heat exchange tube has a coil connection end fixedly welded to one end away from the first and second fluid inlet and outlet pipes, and a coil inlet end fixedly welded to one end of the coil heat exchange tube close to the first and second fluid inlet and outlet pipes.

[0010] Preferably, the coil-type heat exchange tube is made of stainless steel, copper alloy, or titanium alloy, and the coil-type heat exchange tube adopts a serpentine layout in a continuous bending form.

[0011] Preferably, the heat-insulating support plate is made of ceramic fiber, aerogel and low thermal conductivity material, and the end surface of the heat-insulating support plate is provided with neatly arranged coil channel holes.

[0012] Preferably, the phase change material is PCM, water, or crystalline hydrated salt phase change material; the top energy storage box, the middle energy storage box, and the bottom energy storage box are made of carbon steel or stainless steel; and an insulation layer may be installed on the outer end surfaces of the top energy storage box, the middle energy storage box, and the bottom energy storage box.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The top energy storage box, middle energy storage box, and bottom energy storage box of the present invention adopt a rectangular shape that is easy to assemble and transport, and a constraint structure of ribs and insulation support plates as the overall mechanical structure, which can better cooperate with the building structure while improving the mechanical strength of the equipment and the utilization rate of the building space.

[0015] 2. The utility model adopts a detachable multi-layer structure. More intermediate energy storage boxes can be added between the first fluid inlet and outlet pipes and the second fluid inlet and outlet pipes. The number and type of internal phase change materials can be freely selected and adjusted according to the energy storage and heat exchange requirements. During maintenance, the energy storage boxes are independent, which facilitates direct replacement and substitution for maintenance, saving maintenance time and cost.

[0016] 3. The utility model divides the heat exchange unit into a layered structure with a smaller height through the fins and the heat insulation support plate intersecting the coil-type heat exchange tube. In conjunction with the protrusions of the coil-type heat exchange tube on the fins, it limits the convective heat transfer caused by phase separation inside the phase change material, reduces the density difference caused by the phase change, and relatively improves the thermal stability of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is the overall structural view of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the energy storage box of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the intermediate energy storage box of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the bottom energy storage box of the utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the energy storage box of the utility model.

[0023] Description of reference numerals:

[0024] 1. Top energy storage box; 2. Middle energy storage box; 3. Bottom energy storage box; 4. Filling hole; 5. First fluid inlet and outlet pipe; 6. Second fluid inlet and outlet pipe; 7. Coil heat exchange tube; 701. Coil connection end; 702. Coil inlet end; 8. Ribs; 9. Insulation support plate; 10. Positioning column; 11. Fitting hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 5A modular coil-type phase-change energy storage heat exchanger includes a top energy storage box 1, a middle energy storage box 2 is detachably mounted on the lower end of the top energy storage box 1, a bottom energy storage box 3 is detachably mounted on the lower end of the middle energy storage box 2, and a heat insulation support plate 9 is fixedly mounted at the middle position inside the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3. A plurality of coil-type heat exchange tubes 7 are passed through the interior of the heat insulation support plate 9, and fins 8 are fixedly connected to the tube wall of the coil-type heat exchange tube 7. A first fluid inlet and outlet pipe 5 communicating with the coil-type heat exchange tube 7 is fixedly mounted on the front end outer wall of the top energy storage box 1, and a second fluid inlet and outlet pipe communicating with the coil-type heat exchange tube 7 is fixedly mounted on the front end outer wall of the bottom energy storage box 3. 6. A filling hole 4 is provided in the middle of the front end surface of the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3. The interiors of the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3 are all filled with phase change material through the filling hole 4. Positioning posts 10 are fixedly installed at the four corners of the bottom ends of the top energy storage box 1 and the middle energy storage box 2. Fitting holes 11 are provided at the four corners of the top ends of the middle energy storage box 2 and the bottom energy storage box 3 corresponding to the positioning posts 10. A coil connection end 701 is fixedly welded to one end of the coil-type heat exchange tube 7 away from the first fluid inlet and outlet pipe 5 and the second fluid inlet and outlet pipe 6. A coil inlet end 702 is fixedly welded to one end of the coil-type heat exchange tube 7 close to the first fluid inlet and outlet pipe 5 and the second fluid inlet and outlet pipe 6.

[0028] By adopting the above technical solution, the connections between the coil-type heat exchange tubes 7 inside the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3 are connected by welding or flange connection, and the outer layer is wrapped with insulation material. The intersection of the outer walls of the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3 and the outer wall of the coil-type heat exchange tube 7 is welded. Positioning columns 10 and interlocking holes 11 that can support the overall mechanical structure are arranged between the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3. The positioning and support functions are achieved through the positioning and interlocking of the positioning columns 10 and interlocking holes 11. The number of top energy storage boxes 1, middle energy storage boxes 2, and bottom energy storage boxes 3 is set according to the energy storage requirements. If two energy storage chambers are required, only the top energy storage box 1 and the bottom energy storage box 3 are required. If three energy storage boxes are required, one middle energy storage box 2 is required, and so on. The top energy storage box 1, the middle energy storage box 2 and the bottom energy storage box 3 adopt a rectangular chamber that is easy to assemble and transport as the overall mechanical structure. At the same time, high mechanical strength insulation materials are selected to achieve efficient energy storage.

[0029] Specifically, such as Figures 2 to 5As shown, the coil-type heat exchange tube 7 is made of stainless steel, copper alloy, or titanium alloy metal materials, and adopts a serpentine layout in the form of continuous bending; the thermal insulation support plate 9 is made of ceramic fiber and aerogel low thermal conductivity material, and the end surface of the thermal insulation support plate 9 is provided with neatly arranged coil channel holes, allowing the coil-type heat exchange tube 7 to pass through and maintain the overall structure; the phase change material is made of PCM, water, and crystalline hydrated salt phase change material, and the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3 are made of carbon steel and stainless steel metal materials. The outer end surfaces of the top energy storage box 1, the middle energy storage box 2, and the bottom energy storage box 3 can be installed with an insulation layer.

[0030] By adopting the above technical solution, the coil-type heat exchange tube 7 adopts a serpentine layout in the form of continuous bending. According to the limited space of the top energy storage box 1, the middle energy storage box 2 and the bottom energy storage box 3, by arranging multiple layers of coils, the fluid flow length is increased, a multi-fold dense heat exchange area is formed, and the heat exchange efficiency is improved.

[0031] Working principle: The use of modular coil phase change energy storage heat exchanger can be divided into three processes:

[0032] Charging process: The heat transfer fluid flows into the bottom energy storage tank 3 through the second fluid inlet and outlet pipe 6 of the bottom energy storage tank 3, transfers its own cooling or heat energy to the fins 8 through the coil-type heat exchange tubes 7. The fins 8 enhance heat transfer and transfer cooling or heat energy to the phase change material. The coil-type heat exchange tubes 7 inside the top energy storage tank 1, the middle energy storage tank 2, and the bottom energy storage tank 3 are interconnected through the coil connection end 701, and then the fluid is combined and flows out from the first fluid inlet and outlet pipe 5 of the top energy storage tank 1;

[0033] Energy storage process: There is no heat transfer fluid entering or exiting. The top energy storage tank 1, the middle energy storage tank 2, and the bottom energy storage tank 3 dissipate cold energy or heat energy to the outside through the outer insulation layer. At the same time, cold energy or heat energy is transferred between the phase change materials in the top energy storage tank 1, the middle energy storage tank 2, and the bottom energy storage tank 3.

[0034] Energy release process: The heat transfer fluid flows from the first fluid inlet and outlet pipe 5 of the top energy storage tank 1 to the coil-type heat exchange tube 7, exchanges heat through the fins 8, and the phase change material transfers its own cold or heat energy to the heat transfer fluid. The coil-type heat exchange tube 7 inside the top energy storage tank 1, the middle energy storage tank 2, and the bottom energy storage tank 3 are interconnected through the coil connection end 701, and the fluid is combined and discharged from the second fluid inlet and outlet pipe 6 of the bottom energy storage tank 3.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular coil-type phase-change energy storage heat exchanger, comprising a top energy storage box (1), characterized in that: The lower end of the top energy storage box (1) is detachably mounted with an intermediate energy storage box (2), and the lower end of the intermediate energy storage box (2) is detachably mounted with a bottom energy storage box (3). A heat insulation support plate (9) is fixedly mounted at the middle position inside the top energy storage box (1), the intermediate energy storage box (2), and the bottom energy storage box (3). A plurality of coil-type heat exchange tubes (7) are passed through the interior of the heat insulation support plate (9), and ribs (8) are fixedly connected to the tube wall of the coil-type heat exchange tube (7). A first fluid inlet and outlet pipe (5) communicating with the coil-type heat exchange tube (7) is fixedly mounted on the front end outer wall of the top energy storage box (1), and a second fluid inlet and outlet pipe (6) communicating with the coil-type heat exchange tube (7) is fixedly mounted on the front end outer wall of the bottom energy storage box (3).

2. The modular coil-type phase-change energy storage heat exchanger according to claim 1, characterized in that: A filling hole (4) is provided at the middle position of the front end surface of the top energy storage box (1), the middle energy storage box (2), and the bottom energy storage box (3); the interiors of the top energy storage box (1), the middle energy storage box (2), and the bottom energy storage box (3) are all filled with phase change material through the filling hole (4).

3. The modular coil-type phase-change energy storage heat exchanger according to claim 1, characterized in that: Positioning columns (10) are fixedly mounted at the four bottom corners of the top energy storage box (1) and the middle energy storage box (2), and fitting holes (11) are provided at the four top corners of the middle energy storage box (2) and the bottom energy storage box (3) corresponding to the positioning columns (10).

4. The modular coil-type phase-change energy storage heat exchanger according to claim 1, characterized in that: The coil-type heat exchange tube (7) has a coil connection end (701) fixedly welded to one end thereof that is away from the first fluid inlet and outlet tube (5) and the second fluid inlet and outlet tube (6), and the coil inlet end (702) fixedly welded to one end thereof that is close to the first fluid inlet and outlet tube (5) and the second fluid inlet and outlet tube (6).

5. The modular coil-type phase-change energy storage heat exchanger according to claim 1, characterized in that: The coil-type heat exchange tube (7) is made of stainless steel, copper alloy or titanium alloy metal material, and the coil-type heat exchange tube (7) adopts a serpentine layout in a continuous bending form.

6. The modular coil-type phase-change energy storage heat exchanger according to claim 1, characterized in that: The heat-insulating support plate (9) is made of ceramic fiber, aerogel and low thermal conductivity materials, and the end surface of the heat-insulating support plate (9) is provided with neatly arranged coil channel holes.

7. The modular coil-type phase-change energy storage heat exchanger according to claim 2, characterized in that: The phase change material is selected from PCM, water or crystallized hydrated salt phase change material; the top energy storage box (1), the middle energy storage box (2) and the bottom energy storage box (3) are made of carbon steel or stainless steel metal materials; and the outer end surfaces of the top energy storage box (1), the middle energy storage box (2) and the bottom energy storage box (3) can be installed with a thermal insulation layer.

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