CN115854764A - Integrated finned tube phase-change heat storage heat exchanger - Google Patents
Integrated finned tube phase-change heat storage heat exchanger Download PDFInfo
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Abstract
An integrated finned tube phase change heat storage heat exchanger belongs to the technical field of heat exchangers and energy storage. The heat storage and extraction device comprises a metal shell, a heat storage fluid pipeline, a heat extraction fluid pipeline and fins, wherein the heat storage fluid pipeline and the heat extraction fluid pipeline are arranged in the metal shell, a plurality of fins are arranged in the metal shell from top to bottom, the heat storage fluid pipeline and the heat extraction fluid pipeline penetrate through the fins, the fins are in simultaneous junction with the outer wall surfaces of the heat storage fluid pipeline and the heat extraction fluid pipeline, the fins separate the interior of the metal shell from top to bottom to form a plurality of heat storage layers, and solid-liquid phase change materials are stored in the heat storage layers. The integrated fin structure can transfer heat by using the surface of the other pipeline in the heat storage and heat extraction modes respectively, so that the contact area between the metal wall surface and the phase-change material is increased, and the heat storage and release rates are improved; under the mode of heat storage and heat extraction simultaneously, the heat exchange efficiency can be improved through heat conduction among the integrated fins.
Description
Technical Field
The invention relates to the technical field of heat exchangers and energy storage, in particular to an integrated finned tube phase change heat storage heat exchanger.
Background
The traditional shell-and-tube heat exchanger is widely used in industry, but the working principle of the traditional shell-and-tube heat exchanger is that fluid on the cold side and the hot side simultaneously carries out convection heat transfer, and the storage and the transfer of heat energy on time and space cannot be met.
The energy storage heat exchanger is used as a novel heat energy conversion device combining two functions of heat exchange and heat storage, and can store unstable, uncontrollable and low-density solar heat energy and industrial waste heat energy in a phase change latent heat mode through a solid-liquid phase change material; and then phase change latent heat is released through heat release fluid when heat energy is required, so that stable output of release temperature and release heat flow is realized.
The solar energy resource and the industrial waste heat resource show the characteristics of non-uniformity, instability and uncontrollable distribution in time and space. And on the user demand side, a continuous, stable, controllable heat flow input is required. Also, the heat source supply and demand often exhibit a spatiotemporal mismatch relationship. The efficient utilization of dispersed and unstable solar energy, and the recovery of intermittent and multiform industrial waste heat are one of the important technical paths for achieving the goals of carbon neutralization and carbon peak-reaching as early as possible.
Currently, most of the research on solid-liquid phase change energy storage heat exchangers focuses on the research on material properties and the design of a single storage unit. The research and design of how to realize a compact heat storage heat exchanger integrating the functions of heat storage, heat storage and heat release in a large scale and high efficiency are key steps from research to engineering application. And the phase interface and phase separation generated by the solid-liquid phase change energy storage material during phase change are also important design considerations.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a high-efficiency compact phase-change heat storage heat exchanger capable of storing heat in a large scale, and can effectively solve the problem of phase interface and phase separation of phase-change materials. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an integration finned tube phase transition heat-retaining heat exchanger, including metal casing, the hot-medium entry, the hot-medium export, the cold-medium entry, the cold-medium export, the heat-storage fluid pipeline, get hot fluid pipeline and fin, install in the metal casing and arrange the heat-storage fluid pipeline and get hot fluid pipeline, heat-storage fluid pipeline and get hot fluid pipeline are snakelike fluid pipeline, heat-storage fluid pipeline's both ends communicate hot-medium entry and hot-medium export respectively, get hot fluid pipeline's both ends and communicate cold-medium entry and cold-medium export respectively, install a plurality of fins from top to bottom in the metal casing, heat-storage fluid pipeline and get hot fluid pipeline and pass a plurality of fins, a plurality of fins are juncture simultaneously with the outer wall face of heat-storage fluid pipeline and heat-getting fluid pipeline, a plurality of the fin separates the inside of metal casing from top to bottom and forms a plurality of heat storage layers, each other not communicate with each other between the adjacent heat storage layer, solid-liquid phase transition material is put in the heat storage layer.
Further scheme: the heat storage fluid pipelines and the heat taking fluid pipelines which are arranged in the metal shell are arranged in a parallel and staggered mode.
Further scheme: the quantity of storing hot fluid pipeline and getting hot fluid pipeline is a plurality of, and a plurality of storing hot fluid pipelines and a plurality of getting hot fluid pipeline are alternately staggered arrangement in proper order.
Further scheme: the two ends of the heat storage fluid pipelines are respectively connected with a heat medium inlet flow dividing pipe and a heat medium outlet return pipe, the heat medium inlets are communicated with the heat medium inlet flow dividing pipes, and the heat medium outlets are communicated with the heat medium outlet return pipes; and two ends of the hot fluid taking pipelines are respectively connected with a cold medium inlet shunt pipe and a cold medium outlet collecting pipe, the cold medium inlet is used for communicating the cold medium inlet shunt pipe, and the cold medium outlet is communicated with the cold medium outlet collecting pipe.
Further scheme: the number of the heat storage fluid pipelines and the number of the heat taking fluid pipelines are 3-15.
Further scheme: the heat storage fluid pipeline and the heat taking fluid pipeline vertically penetrate through the plurality of fins, and the fins are fixedly connected with the outer wall surfaces of the heat storage fluid pipeline and the heat taking fluid pipeline in a welding mode.
Further scheme: the metal shell is a square shell or a round shell.
The invention has the beneficial effects that:
1. the invention adopts an integrated fin structure to connect cold and hot pipelines, on one hand, the contact area between the solid wall surface and the phase-change material can be increased through the fin wall surface, on the other hand, the contact area between the solid wall surface and the phase-change material can be increased by means of the pipeline wall surface at the other side, thereby realizing the efficient phase-change heat storage between the solid and the liquid of the phase-change material; and when the fluid on the cold side and the fluid on the hot side enter the heat exchanger at the same time, the integrated fin structure can also improve the heat exchange rate through direct heat conduction between the two tube walls. In addition, the phase change material has a problem of phase separation due to a density difference between solid and liquid phases, which leads to a decrease in thermal stability of the material.
2. According to the invention, the heat exchanger is divided into a multilayer structure with smaller height through the integrated fin structure, so that in each interlayer during heat exchange, because the wall surface temperatures of the upper fin and the lower fin are consistent, the height of the phase change material is smaller, and thus the natural convection causing phase separation in the phase change material is smaller.
3. Compared with the traditional phase-change heat storage heat exchanger with an interrupted fin structure, the integrated finned tube phase-change heat storage heat exchanger can reduce the thermal resistance between fluids at the cold side and the hot side to 1/3 under the steady-state working condition of heat storage and heat release at the same time, and the instantaneous heat flow can be improved by more than 3 times. In addition, under the working condition of heat storage only, the temperature of the phase change material in the integral finned tube phase change heat storage heat exchanger is more uniform, and the heat storage time required by the phase change material is about 40% of that of the original heat exchanger with the discontinuous finned structure.
Drawings
FIG. 1 is a three-dimensional schematic view of an integrated finned tube phase change heat storage heat exchanger;
fig. 2 is a schematic structural view of a phase change heat storage heat exchanger in a third embodiment;
FIG. 3 is a two-dimensional schematic view of an integrated finned tube phase change heat storage heat exchanger;
FIG. 4 is a schematic diagram of heat transfer within a phase change heat storage heat exchanger according to a second embodiment;
FIG. 5 is a schematic diagram of the internal structure of a conventional heat exchanger in the fifth embodiment;
FIG. 6 is a schematic diagram of the internal structure of a conventional heat exchanger in the fifth embodiment;
FIG. 7 is a schematic diagram of the internal structure of a conventional heat exchanger in the fifth embodiment;
FIG. 8 is a heat source simulation analysis chart of the heat exchange process of the conventional intermittent finned heat exchanger and the integrated finned tube heat exchanger of the invention;
FIG. 9 is a temperature rise plot of the heat storage material of a conventional interrupted finned heat exchanger and an integrated finned tube heat exchanger of the present invention;
the feature names indicated by the respective reference numerals in the drawings are as follows:
the heat storage device comprises a metal shell 1, a heat medium inlet 2, a heat medium outlet 3, a cold medium inlet 4, a cold medium outlet 5, a heat storage fluid pipeline 6, a heat taking fluid pipeline 7, fins 8, a heat storage layer 9, a heat medium inlet shunt pipe 10, a heat medium outlet return pipe 11, a cold medium inlet shunt pipe 12 and a cold medium outlet manifold 13.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
The first specific implementation way is as follows:
the embodiment is described by combining fig. 1-5, and discloses an integrated finned tube phase change heat storage heat exchanger, which comprises a metal shell 1, a heat medium inlet 2, a heat medium outlet 3, a cold medium inlet 4, a cold medium outlet 5, a heat storage fluid pipeline 6, a heat taking fluid pipeline 7 and fins 8, wherein the metal shell 1 is a square shell or a round shell, the metal shell 1 is internally provided with the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7, the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7 are both serpentine fluid pipelines, two ends of the heat storage fluid pipeline 6 are respectively communicated with the heat medium inlet 2 and the heat medium outlet 3, two ends of the heat taking fluid pipeline 7 are respectively communicated with the cold medium inlet 4 and the cold medium outlet 5, the metal shell 1 is internally provided with a plurality of fins 8 from top to bottom, the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7 pass through the plurality of fins 8, the plurality of fins 8 are simultaneously communicated with outer wall surfaces of the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7, the plurality of fins 8 separate the metal shell 1 from top to bottom to form a plurality of heat storage layers 9, adjacent heat storage fluid layers are not communicated with each other, and the heat storage fluid layers are not communicated with each other: higher aliphatic hydrocarbons (n-hexadecane, n-octadecane, paraffin, etc.), fatty acids and esters thereof (stearic acid, palmitic acid, etc.), crystalline hydrated salts (Na 2SO 4.10H 2O, mn (NO 3) 2.6H 2O, etc.), molten salts (LiF, naF, caF2, etc.), metals and alloys (lead-tin alloy, etc.), or polymers (polyethylene glycol, etc.). So set up, the realization mode that phase transition heat-retaining heat exchanger "heat-retaining" and "get heat" is:
heat storage (heat storage): the heat-releasing heat medium enters from the heat medium inlet 2, flows through the multi-path snake-shaped heat storage fluid pipeline 6, exchanges heat with the phase-change material on the shell side, is changed from a solid state to a liquid state, stores a large amount of heat energy in a latent heat mode and has a part of sensible heat (namely, the heat energy is added to cause the change of the temperature of the material and not to change the phase), flows out from the heat medium outlet 3 after releasing the heat, and is subjected to heat preservation treatment on the outer surface of the metal shell, namely, coated with heat preservation rock wool, so that the heat storage material can keep the storage of the heat energy for a long time on the shell side due to the effect of the heat preservation material;
heat removal (exotherm): when heat energy is needed, the cold medium for heat taking enters from the cold medium inlet 4, flows through the other set of multi-path snakelike heat taking fluid pipeline 7, exchanges heat with the phase change material on the shell side at the same time, the material is changed from a liquid state to a solid state to release a large amount of latent heat energy, and the fluid for heat taking flows out from the cold medium outlet 5.
The fluid on the two sides can enter the energy storage heat exchanger simultaneously to realize real-time heat storage and heat extraction, and can also finish the two processes of heat storage and heat extraction at the same time;
in this embodiment, fin 8 borders with the outer wall of heat-storage fluid pipe 6 and heat-extraction fluid pipe 7, and fin 8 borders with the inner wall of metal casing 1 all around, separates metal casing 1 inside from top to bottom and forms a plurality of heat storage layers 9, and each other does not communicate with each other between adjacent heat storage layers 9, from this at the inside "integrated fin structure" that forms of metal casing 1, fin is connected heat-storage fluid pipe 6 and heat-extraction fluid pipe 7 promptly, realizes metal casing 1's layering again. When the shell-side phase-change material is subjected to solid-liquid phase-change conversion in the conventional heat exchanger, a layer of liquid film or wax film is generated on the heat exchange wall surface first, and the existence of the liquid film or wax film reduces the heat exchange performance between the solid wall surface and the internal material. Therefore, in the embodiment, an integrated fin structure is adopted to connect the cold and heat pipelines (the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7), so that on one hand, the contact area between the solid wall surface and the phase-change material can be increased through the fin wall surface, and on the other hand, the contact area between the solid wall surface and the phase-change material can be increased by means of the pipeline wall surface on the other side, thereby realizing efficient phase-change heat storage between the solid and liquid phase-change materials; moreover, when fluids on the cold side and the hot side enter the heat exchanger simultaneously, the integrated fin structure can also improve the heat exchange rate through direct heat conduction between the two tube walls.
In addition, in the conventional heat exchanger, the phase-change material has a density difference during solid-liquid phase change, so that the phase separation problem occurs, and the thermal stability of the material is reduced. In the embodiment, the heat exchanger is divided into a multi-layer structure with small height through the integrated fin structure, so that in each interlayer when heat exchange occurs, because the wall surface temperatures of the upper fin and the lower fin are consistent, the height of the phase change material is small, and the natural convection causing phase separation in the phase change material is small.
The second embodiment is as follows:
the embodiment is described with reference to fig. 1 to 5, and discloses an integrated finned tube phase change heat storage heat exchanger, wherein heat storage fluid pipes 6 and heat taking fluid pipes 7 arranged in a metal shell 1 are arranged in a parallel and staggered manner. The heat storage fluid pipeline 6 and the heat taking fluid pipeline 7 are uniformly arranged in the metal shell 1, so that heat storage and heat taking are uniform, and the heat exchange efficiency is high. In addition, when the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7 are combined, the structure of the integrated fin is combined, when heat storage or heat taking is carried out independently, the contact area between the solid wall surface and the phase change material can be increased by means of the pipeline wall surface on the other side, so that efficient phase change heat storage between solid and liquid of the phase change material is realized, for example, the heat storage process is carried out, no medium flows into the heat taking fluid pipeline 7 due to independent heat storage, at the moment, heat-releasing heat medium enters from the heat medium inlet 2 and flows through the multi-path snakelike heat storage fluid pipeline 6, the heat is transferred to the fin 8 by the heat storage fluid pipeline 6, the fin 8 carries heat, in addition, under the action of the integrated fin 8, the heat carried by the heat storage fluid pipeline 6 is transferred to the heat taking fluid pipeline 7 through the fin 8, so that the heat is also carried by the heat taking fluid pipeline 7 (the heat storage fluid pipeline 7 is also put into the heat storage process, as shown in fig. 4), the heat storage fluid pipeline 6, the fin 8 and the heat taking fluid 7 jointly generate heat with the phase change material in the shell, so that heat storage can be heat exchange is realized, and the heat storage efficiency can be improved by the heat storage metal shell body 1 which is improved due to the heat taking pipeline 8 and the heat pipe 7 which are arranged in parallel and are staggered. Otherwise, in the same way, the heat extraction process is carried out, and the heat storage fluid pipeline 6 is put into the heat extraction work.
The third concrete implementation mode:
the embodiment is described with reference to fig. 1 to 5, and discloses an integrated finned tube phase change heat storage heat exchanger, wherein the number of the heat storage fluid pipelines 6 and the heat taking fluid pipelines 7 is multiple, and the multiple heat storage fluid pipelines 6 and the multiple heat taking fluid pipelines 7 are sequentially arranged in an alternating and staggered manner.
Furthermore, two ends of the heat storage fluid pipelines 6 are respectively connected with a heat medium inlet shunt pipe 10 and a heat medium outlet return pipe 11, the heat medium inlet 2 is communicated with the heat medium inlet shunt pipe 10, and the heat medium outlet 3 is communicated with the heat medium outlet return pipe 11; and two ends of the heat taking fluid pipelines 7 are respectively connected with a cold medium inlet shunt pipe 12 and a cold medium outlet collecting pipe 13, the cold medium inlet 4 is used for communicating the cold medium inlet shunt pipe 12, and the cold medium outlet 5 is communicated with the cold medium outlet collecting pipe 13. So set up, in metal casing 1's inside, carry out the heat-retaining and get hot process, the hot medium of heat-retaining and the cold medium who gets hot are respectively through hot medium entry shunt tubes 10 and cold medium entry shunt tubes 12, enter into a plurality of heat-storing fluid pipelines 6 and a plurality of hot fluid pipeline 7 of getting through the reposition of redundant personnel mode, a plurality of heat-storing fluid pipelines 6 and a plurality of hot fluid pipeline 7 of getting realize the heat-retaining respectively and get hot work to this improves the heat-retaining and gets hot efficiency.
Further scheme: the number of the heat storage fluid pipelines 6 and the number of the heat taking fluid pipelines 7 are 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15.
The fourth concrete implementation mode is as follows:
the embodiment is described with reference to fig. 1 to 5, and discloses an integrated finned tube phase change heat storage heat exchanger, wherein the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7 vertically penetrate through a plurality of fins 8, the junctions of the fins 8 and the outer wall surfaces of the heat storage fluid pipeline 6 and the heat taking fluid pipeline 7 are fixedly connected in a welding mode, and the junctions of the fins 8 and the inner wall surfaces of the metal shell 1 are also fixedly connected in a welding mode. So set up, fin 8 forms integrated fin structure with heat-retaining fluid pipeline 6 and get hot fluid pipeline 7, when carrying out the heat-retaining alone or getting hot, can improve solid wall and phase change material's area of contact with the help of opposite side pipeline wall to realize the high-efficient phase change heat-retaining between phase change material solid, liquid.
For example, a heat storage process is carried out independently, no medium flows into the heat taking fluid pipeline 7, at the moment, heat releasing heat medium enters from the heat medium inlet 2 and flows through the multi-path snakelike heat storage fluid pipeline 6, the heat storage fluid pipeline 6 transfers heat to the fins 8, the fins 8 carry part of heat, in addition, under the action of the integrated fins 8, "heat" carried by the heat storage fluid pipeline 6 is transferred to the heat taking fluid pipeline 7 through the fins 8, the heat taking fluid pipeline 7 also carries part of "heat" (namely, the heat taking fluid pipeline 7 is also put into the heat storage process), and the heat storage fluid pipeline 6, the fins 8 and the heat taking pipeline 7 exchange heat with the shell-side phase change material together to realize heat storage.
In addition, the heat exchanger of this embodiment also can carry out the heat-retaining simultaneously and get hot, when cold, hot both sides fluid gets into the heat exchanger simultaneously in, integration fin structure also can promote heat transfer rate through the direct heat conduction between two pipe walls. Namely, the heat of the hot medium in the heat storage fluid pipeline 6 is directly transferred to the cold medium in the heat taking pipeline 7 through the fins 8, and the heat is not required to be transferred to the phase change heat storage material in the metal shell 1 and then transferred to the cold medium in the heat taking pipeline 7 in the process, so that the heat loss is indirectly avoided.
The fifth concrete implementation mode:
the embodiment is described with reference to fig. 1 to 7 in the specification, in the embodiment, the fin 8 is used to separate the metal shell 1 into a multi-layer structure, and each layer is not communicated with each other, and the design mode has the advantages that:
in a conventional heat exchanger, a phase-change material has a density difference during solid-liquid phase change, so that a phase separation problem occurs, and the thermal stability of the material is reduced. As shown in fig. 5 and 6, a heat exchange pipeline of the conventional heat exchanger in fig. 5 does not adopt a fin structure, when heat storage/heat extraction is generated in the heat exchanger, the span L1 of a fluid from top to bottom is large, the flow of a temperature field or a concentration field of a phase-change material per se is uneven, the uneven temperature field or the concentration field causes an uneven density field, so that the problem of phase separation occurs, the thermal stability of the material is reduced, and the heat storage and heat extraction effects are poor; as shown in fig. 6, in the conventional heat exchanger, there is also a structure in which fins are mounted on the wall of a heat exchange tube, but because the fins do not form a layer inside the heat exchanger, a span L2 from top to bottom of fluid in the heat exchanger still exists, and although the fins in the heat exchanger can conduct heat and improve heat exchange efficiency, the flow of a temperature field or a concentration field of a phase change material is still uneven, and the phase separation phenomenon cannot be fundamentally solved.
In this embodiment, the heat exchanger is divided into a plurality of layers with smaller height by the integrated fin structure, as shown in fig. 7 (H in the figure represents the height of each layer), so that in each interlayer when heat exchange occurs, because the wall surface temperatures of the upper fin and the lower fin are the same, the height of the phase change material is smaller, the natural convection causing phase separation inside the phase change material is smaller, the heat exchange efficiency is higher, and the heat exchange effect is obvious.
In addition, in the embodiment, through carrying out heat source analysis simulation on the traditional discontinuous fin structure heat storage heat exchanger and the integrated fin tube phase change heat storage heat exchanger in the processes of realizing heat storage and heat extraction, compared with the traditional discontinuous fin structure phase change heat storage heat exchanger, the integrated fin tube phase change heat storage heat exchanger can reduce the thermal resistance between fluids at the cold side and the hot side to 1/3 under the steady state working condition of heat storage and heat release at the same time, and the instantaneous heat flow can be improved by more than 3 times. Meanwhile, as shown in fig. 8, under the heat storage working condition only, the temperature change condition of the phase change material near the hot fluid pipeline is shown in the upper left corner in fig. 8, and the temperature change condition of the phase change material near the cold fluid pipeline is shown in the lower left corner in fig. 8, so that the temperature of the phase change material inside the integrated finned tube phase change heat storage heat exchanger is more uniform, the temperature change material near the hot fluid pipeline with an intermittent fin structure is shown in the upper right corner in fig. 8, the temperature change material near the cold fluid pipeline with an intermittent fin structure is shown in the lower right corner in fig. 8, and it can be seen that when the intermittent fin structure is adopted, the temperature uniformity of the phase change material inside the phase change heat storage heat exchanger is poor; although the heat transfer effect can be improved and the average temperature rise of the heat storage material can be improved by installing the fins on the fluid pipeline, it can be seen from fig. 8 that the average temperature rise of the heat storage material is 40 ℃ by adopting an integrated fin pipeline heat exchanger structure, while the average temperature rise of the heat storage material is 29 ℃ by adopting a traditional discontinuous fin pipeline heat exchanger structure, and better heat resistance reduction and temperature rise effects can be obtained by adopting the integrated fin pipeline heat exchanger structure.
In addition, as shown in fig. 9, when the temperature rises to 60 ℃, the heat storage time of the integrated finned tube phase change heat storage heat exchanger is about 60 minutes, and the heat storage time of the heat storage heat exchanger adopting the traditional interrupted finned structure is about 150 minutes, so that when the integrated finned tube phase change heat storage heat exchanger is adopted, the heat storage time required by the phase change material is about 40% of that of the original interrupted finned structure heat exchanger.
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides an integration finned tube phase transition heat-retaining heat exchanger, including metal casing (1), hot medium entry (2), hot medium export (3), cold medium entry (4), cold medium export (5), heat-retaining fluid pipe (6), get hot fluid pipeline (7) and fin (8), the installation has arranged in metal casing (1) and has stored up hot fluid pipe way (6) and get hot fluid pipe way (7), heat-retaining fluid pipe way (6) and get hot fluid pipe way (7) and be snakelike fluid pipe way, the both ends of heat-retaining fluid pipe way (6) communicate hot medium entry (2) and hot medium export (3) respectively, the both ends of getting hot fluid pipe way (7) communicate cold medium entry (4) and cold medium export (5) respectively, its characterized in that: install a plurality of fins (8) from top to bottom in metal casing (1), heat-retaining fluid pipe (6) and get hot fluid pipe (7) and pass a plurality of fins (8), and a plurality of fins (8) and heat-retaining fluid pipe (6) and get the outer wall juncture of hot fluid pipe (7), a plurality of fin (8) separate the inside of metal casing (1) from top to bottom and form a plurality of heat storage layers (9), do not communicate with each other between adjacent heat storage layer (9), have placed solid-liquid phase change material in heat storage layer (9).
2. The integrated finned tube phase-change heat storage heat exchanger of claim 1, characterized in that: the heat storage fluid pipeline (6) and the heat taking fluid pipeline (7) which are arranged in the metal shell (1) are arranged in a parallel and staggered mode.
3. The integrated finned tube phase change heat storage heat exchanger of claim 1, wherein: the number of the heat storage fluid pipelines (6) and the heat taking fluid pipelines (7) is multiple, and the plurality of heat storage fluid pipelines (6) and the plurality of heat taking fluid pipelines (7) are arranged in an alternate and staggered mode in sequence.
4. The integrated finned tube phase change heat storage heat exchanger of claim 1, wherein: two ends of the heat storage fluid pipelines (6) are respectively connected with a heat medium inlet shunt pipe (10) and a heat medium outlet return pipe (11), the heat medium inlet (2) is communicated with the heat medium inlet shunt pipe (10), and the heat medium outlet (3) is communicated with the heat medium outlet return pipe (11); the two ends of the hot fluid taking pipelines (7) are respectively connected with a cold medium inlet shunt pipe (12) and a cold medium outlet collecting pipe (13), the cold medium inlet (4) is used for communicating with the cold medium inlet shunt pipe (12), and the cold medium outlet (5) is communicated with the cold medium outlet collecting pipe (13).
5. The integrated finned tube phase change heat storage heat exchanger of claim 4, wherein: the number of the heat storage fluid pipelines (6) and the number of the heat taking fluid pipelines (7) are 3-15.
6. The integrated finned tube phase change heat storage heat exchanger of claim 1, wherein: the heat storage fluid pipeline (6) and the heat taking fluid pipeline (7) vertically penetrate through the plurality of fins (8), and the fins (8) are fixedly connected with the outer wall surfaces of the heat storage fluid pipeline (6) and the heat taking fluid pipeline (7) in a welding mode.
7. The integrated finned tube phase change heat storage heat exchanger of claim 1, wherein: the metal shell (1) is a square shell or a round shell.
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| CN202211395866.8A CN115854764A (en) | 2022-11-08 | 2022-11-08 | Integrated finned tube phase-change heat storage heat exchanger |
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