A spiral phase change energy storage heat exchanger

Abstract

The present invention discloses a spiral phase-change energy storage heat exchanger, comprising a shell; a first channel in a plane spiral shape is arranged in the shell, and the axial ends of the first channel are blocked; a first fluid inlet pipe connected to the spiral inner circle inlet of the first channel is arranged at the upper part of the shell, and a first fluid outlet pipe connected to the spiral outer circle outlet of the first channel is arranged at the middle part of the shell; a plurality of phase-change energy storage units are arranged in the first channel; a second channel in a plane spiral structure is formed between adjacent spiral circle flow channels of the first channel, and the axial ends of the second channel are open; a second fluid inlet pipe connected to the second channel is arranged at the upper part of the shell, and a second fluid outlet pipe connected to the second channel is arranged at the lower part of the shell. The spiral phase-change energy storage heat exchanger of the present invention adopts a double spiral channel, and a phase-change energy storage unit is arranged in the first channel. Energy storage can be realized by utilizing the heat absorption and release characteristics of the phase-change material in the phase-change energy storage unit.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a spiral phase-change energy storage heat exchanger. Background Art

[0002] At present, phase change energy storage technology has been applied due to its advantages such as high heat storage density and basically stable storage / release temperature. Phase change materials have the characteristics of high latent heat release or absorption when phase change occurs. Using phase change materials as heat storage media in heat exchangers can greatly improve the heat storage capacity.

[0003] Based on this, the present application proposes a spiral phase change energy storage heat exchanger, which adopts a double spiral channel, arranges a phase change energy storage unit in the first channel, and utilizes the heat absorption and release characteristics of the phase change material in the phase change energy storage unit to achieve energy storage. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a spiral phase-change energy storage heat exchanger.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A spiral phase-change energy storage heat exchanger comprises a shell;

[0007] The shell is provided with a first channel in a plane spiral shape, and the axial ends of the first channel are blocked; the upper part of the shell is provided with a first fluid inlet pipe connected to the inlet of the spiral inner circle of the first channel, and the middle part of the shell is provided with a first fluid outlet pipe connected to the outlet of the spiral outer circle of the first channel;

[0008] A plurality of phase change energy storage units are arranged in the first channel;

[0009] A second channel with a planar spiral structure is formed between adjacent spiral flow channels of the first channel, and both axial ends of the second channel are open; a second fluid inlet pipe connected to the second channel is arranged at the upper part of the shell, and a second fluid outlet pipe connected to the second channel is arranged at the lower part of the shell.

[0010] Preferably, two channel plates in a planar spiral structure for enclosing the first channel and the second channel are arranged in the shell, and the two channel plates are nested with each other and arranged in parallel;

[0011] A first partition plate extending along the axial direction of the shell is provided in the middle of the shell, and two ends of the first partition plate along the radial direction of the shell are fixedly connected to the spiral inner ends of the two channel plates respectively;

[0012] A second partition plate extending along the axial direction of the shell and used to block the spiral outer ends of the first channel and the second channel is arranged in the shell, and the second partition plate is fixedly connected to the spiral outer ends of the two channel plates;

[0013] The top and bottom ends of the first channel are provided with cover plates for sealing the corresponding axial ends of the first channel.

[0014] Preferably, a spiral twisted belt with a conical spiral structure is provided in the second channel, and both ends of the spiral twisted belt in the width direction are fixedly connected to the corresponding channel walls of the second channel;

[0015] The spiral twisted belt is provided with flow holes.

[0016] Preferably, both ends of the spirally twisted band in the width direction are welded to the channel wall of the second channel.

[0017] Preferably, a horizontal cover plate is fixedly arranged at the center of the top end of the second channel, and the horizontal cover plate is fixedly connected to the spiral head end of the spiral twisted belt.

[0018] Preferably, the phase-change energy storage unit comprises an energy storage shell, and the energy storage shell is provided with a through hole for facilitating the passage of fluid;

[0019] The interior of the energy storage shell is filled with phase change material.

[0020] Preferably, the shell comprises a main body in a cylindrical structure, an upper cover is arranged at the top end of the main body, and a lower cover is arranged at the bottom end of the main body;

[0021] The first fluid inlet pipe is arranged on the upper cover, and the central axis of the first fluid inlet pipe is parallel to the central axis of the body;

[0022] The first fluid outlet pipe is arranged on the body, and the central axis of the first fluid outlet pipe is perpendicular to the central axis of the body;

[0023] The second fluid inlet pipe is arranged on the upper cover, and the central axis of the second fluid inlet pipe is perpendicular to the central axis of the body;

[0024] The second fluid outlet pipe is arranged on the lower cover, and the central axis of the second fluid outlet pipe is perpendicular to the central axis of the body.

[0025] Preferably, a drain pipe is provided at the bottom end of the lower cover.

[0026] Preferably, the upper cover and the body, as well as the lower cover and the body, are flange-connected.

[0027] The beneficial effects of the present invention are:

[0028] The spiral phase-change energy storage heat exchanger of the present invention adopts a double spiral channel, and a phase-change energy storage unit is arranged in the first channel. The heat absorption and release characteristics of the phase-change material in the phase-change energy storage unit are utilized to realize energy storage.

[0029] A spiral twisted belt is arranged in the second channel to generate secondary circulation when the fluid flows, increase thermal disturbance and improve heat exchange efficiency; at the same time, flow holes are punched on the spiral twisted belt, which is conducive to reducing flow resistance and accelerating the discharge of condensate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0031] Figure 1 It is a schematic structural stereogram of the spiral phase-change energy storage heat exchanger of the present invention;

[0032] Figure 2 It is a schematic front view of the structure of the spiral phase-change energy storage heat exchanger of the present invention;

[0033] Figure 3 yes Figure 2 AA section view;

[0034] Figure 4 It is a schematic diagram of the internal structure of the housing in the present invention;

[0035] Figure 5 It is a schematic diagram of the internal structure of the shell after the spiral twisted band is removed in the present invention;

[0036] Figure 6 is a schematic three-dimensional diagram of the structure of the spiral twisted tape in the present invention;

[0037] Figure 7 It is a schematic front view of the structure of the spiral twisted belt in the present invention;

[0038] Figure 8 is a schematic top view of the structure of the spiral twisted tape in the present invention;

[0039] Fig. 9 is a cross-sectional view of a phase change energy storage unit in the present invention;

[0040] in:

[0041] 1-shell, 11-body, 12-upper cover, 13-lower cover, 14-drain pipe, 15-channel plate, 16-first partition plate, 17-second partition plate, 18-covering plate;

[0042] 2-first channel, 21-first fluid inlet pipe, 22-first fluid outlet pipe;

[0043] 3-phase change energy storage unit, 31-energy storage shell, 32-through hole;

[0044] 4-second channel, 41-second fluid inlet pipe, 42-second fluid outlet pipe;

[0045] 5- spiral twisted belt, 51- flow hole, 52- horizontal cover plate. DETAILED DESCRIPTION

[0046] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0049] In the present invention, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meaning of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0050] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0051] like Figure 1-3 As shown, a spiral phase-change energy storage heat exchanger comprises a shell 1;

[0052] The housing 1 is provided with a first channel 2 in a plane spiral shape, and the first channel 2 is blocked at both axial ends; the upper part of the housing 1 is provided with a first fluid inlet pipe 21 connected to the spiral inner circle inlet of the first channel 2, and the middle part of the housing 1 is provided with a first fluid outlet pipe 22 connected to the spiral outer circle outlet of the first channel 2; since the first channel 2 is blocked at both axial ends, the flow path of the fluid entering through the first fluid inlet pipe 21 is: moving from the spiral inner circle inlet of the first channel 2 along the plane spiral direction to the first fluid outlet pipe 22 at the spiral outer circle outlet;

[0053] A plurality of phase change energy storage units 3 are arranged in the first channel 2. Energy storage can be realized by utilizing the heat absorption and release characteristics of the phase change material in the phase change energy storage unit 3. The heat storage capacity of the energy storage heat exchanger can be changed by increasing or decreasing the number of phase change energy storage units 3.

[0054] A second channel 4 with a planar spiral structure is formed between adjacent spiral flow channels of the first channel 2, and the second channel 4 is open at both axial ends; a second fluid inlet pipe 41 connected to the second channel 4 is provided at the upper part of the housing 1, and a second fluid outlet pipe 42 connected to the second channel 4 is provided at the lower part of the housing 1. Since both axial ends of the second channel 4 are open, the flow path of the fluid entering through the second fluid inlet pipe 41 is: moving from the end where the second fluid inlet pipe 41 is located to the second fluid outlet pipe 42 along the axial direction of the second channel 4.

[0055] Preferably, Figure 3-5 As shown, two channel plates 15 in a planar spiral structure are arranged in the housing 1 to enclose the first channel 2 and the second channel 4. The two channel plates 15 are nested and arranged in parallel with each other. The two channel plates 15 enclose two planar spiral channels. The outer spiral circles of the two planar spiral channels close to the outer wall of the housing 1 are the first channels 2.

[0056] A first partition plate 16 extending axially along the shell 1 is provided in the middle of the shell 1. Both ends of the first partition plate 16 along the radial direction of the shell 1 are fixedly connected to the spiral inner ends of the two channel plates 15, respectively, so as to block the spiral inner ends of the first channel 2 and the second channel 4.

[0057] The housing 1 is provided with a second partition plate 17 extending axially along the housing 1 and used to block the spiral outer ends of the first channel 2 and the second channel 4. The second partition plate 17 is fixedly connected to the spiral outer ends of the two channel plates 15.

[0058] The top and bottom ends of the first channel 2 are provided with cover plates 18 for sealing the corresponding axial ends of the first channel 2 .

[0059] Preferably, a spiral twisted belt 5 with a conical spiral structure is arranged in the second channel 4, such as Figure 6-8 As shown, both ends of the spiral twisted band 5 in the width direction are fixedly connected to the corresponding channel walls of the second channel 4;

[0060] The spirally twisted belt 5 is provided with a flow hole 51 .

[0061] The arrangement of the spiral twisted belt 5 in the second channel 4 generates secondary circulation when the fluid moves from the end where the second fluid inlet pipe 41 is located to the second fluid outlet pipe 42 along the axial direction of the second channel 4, thereby increasing thermal disturbance and improving heat exchange efficiency.

[0062] Preferably, the two ends of the spiral twisted band 5 in the width direction are welded to the channel wall of the second channel 4. The two sides of the spiral twisted band 5 are welded to the channel wall to play a role of reinforcement and spacing, so that the strength of the spiral body is improved.

[0063] Preferably, a horizontal cover plate 52 is fixedly disposed at the center of the top end of the second channel 4 , and the horizontal cover plate 52 is fixedly connected to the spiral head end of the spiral twisted belt 5 .

[0064] Preferably, Fig. 9 As shown, the phase-change energy storage unit 3 includes an energy storage shell 31, and the energy storage shell 31 is provided with a through hole 32 for fluid to pass through;

[0065] The energy storage housing 31 is filled with phase change material.

[0066] Preferably, the housing 1 comprises a main body 11 of a cylindrical structure, an upper cover 12 is disposed at the top end of the main body 11, and a lower cover 13 is disposed at the bottom end of the main body 11;

[0067] The first fluid inlet pipe 21 is disposed on the upper cover 12, and the central axis of the first fluid inlet pipe 21 is parallel to the central axis of the body 11;

[0068] The first fluid outlet pipe 22 is disposed on the body 11, and the central axis of the first fluid outlet pipe 22 is perpendicular to the central axis of the body 11;

[0069] The second fluid inlet pipe 41 is disposed on the upper cover 12, and the central axis of the second fluid inlet pipe 41 is perpendicular to the central axis of the body 11;

[0070] The second fluid outlet pipe 22 is disposed on the lower cover 13 , and the central axis of the second fluid outlet pipe 22 is perpendicular to the central axis of the body 11 .

[0071] Preferably, a drain pipe 14 is provided at the bottom end of the lower cover 13 .

[0072] Preferably, the upper cover 12 and the body 11 , as well as the lower cover 13 and the body 11 , are flange-connected.

[0073] A spiral phase-change energy storage heat exchanger, the specific implementation of which is as follows:

[0074] The first fluid is a cold source. The first fluid enters the first channel 2 from the first fluid inlet pipe 21, flows in a spiral in the horizontal direction, turns from the center to the periphery, and flows out from the first fluid outlet pipe 22. The first channel 2 is encapsulated with a phase change energy storage unit 3. When the phase change material in the phase change energy storage unit 3 undergoes a phase change, it absorbs or releases heat.

[0075] The second fluid is a heat source, which enters through the second fluid inlet pipe 41 and flows axially downward through the open second channel 4. A spiral twisted belt 5 is installed in the second channel 4. When the second fluid flows in the second channel 4 equipped with the spiral twisted belt 5, secondary circulation will be generated to increase thermal disturbance and improve heat exchange efficiency. In the process of the second fluid flowing downward along the second channel 4, heat is absorbed and condensed. The condensate is discharged from the drain pipe 14, and the uncondensed fluid is discharged from the second fluid outlet pipe 42.

[0076] In the present application, the second channel 4 is open at both axial ends and has a large flow area. On the one hand, it solves the problem of small flow space, and on the other hand, it facilitates the discharge of condensate. At the same time, flow holes 51 are punched on the spiral twisted band 5, which is beneficial to reduce flow resistance and accelerate the discharge of condensate.

[0077] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the protection scope of the present invention.

Claims

1. A spiral phase change energy storage heat exchanger, characterized in that: including a housing; The shell is provided with a first channel in a plane spiral shape, and the axial ends of the first channel are blocked; the upper part of the shell is provided with a first fluid inlet pipe connected to the inlet of the spiral inner circle of the first channel, and the middle part of the shell is provided with a first fluid outlet pipe connected to the outlet of the spiral outer circle of the first channel; A plurality of phase change energy storage units are arranged in the first channel; A second channel with a planar spiral structure is formed between adjacent spiral flow channels of the first channel, and both axial ends of the second channel are open; a second fluid inlet pipe connected to the second channel is provided at the upper part of the shell, and a second fluid outlet pipe connected to the second channel is provided at the lower part of the shell; A spiral twisted band with a conical spiral structure is arranged in the second channel, and both ends of the spiral twisted band in the width direction are fixedly connected to the corresponding channel wall of the second channel; The spiral twisted belt is provided with a flow hole; Both ends of the spiral twisted band in the width direction are welded to the channel wall of the second channel; The phase-change energy storage unit comprises an energy storage shell, and the energy storage shell is provided with a through hole for fluid to pass through; The interior of the energy storage shell is filled with phase change material.

2. The spiral phase-change energy storage heat exchanger according to claim 1, characterized in that: Two channel plates in a planar spiral structure for forming a first channel and a second channel are arranged in the shell, and the two channel plates are nested with each other and arranged in parallel; A first partition plate extending along the axial direction of the shell is provided in the middle of the shell, and two ends of the first partition plate along the radial direction of the shell are fixedly connected to the spiral inner ends of the two channel plates respectively; A second partition plate extending along the axial direction of the shell and used to block the spiral outer ends of the first channel and the second channel is arranged in the shell, and the second partition plate is fixedly connected to the spiral outer ends of the two channel plates; The top and bottom ends of the first channel are provided with cover plates for sealing the corresponding axial ends of the first channel.

3. The spiral phase-change energy storage heat exchanger according to claim 1, characterized in that: A horizontal cover plate is fixedly arranged at the center of the top end of the second channel, and the horizontal cover plate is fixedly connected to the spiral head end of the spiral twisted belt.

4. The spiral phase-change energy storage heat exchanger according to claim 1, characterized in that: The shell comprises a main body in a cylindrical structure, an upper cover is arranged at the top end of the main body, and a lower cover is arranged at the bottom end of the main body; The first fluid inlet pipe is arranged on the upper cover, and the central axis of the first fluid inlet pipe is parallel to the central axis of the body; The first fluid outlet pipe is arranged on the body, and the central axis of the first fluid outlet pipe is perpendicular to the central axis of the body; The second fluid inlet pipe is arranged on the upper cover, and the central axis of the second fluid inlet pipe is perpendicular to the central axis of the body; The second fluid outlet pipe is arranged on the lower cover, and the central axis of the second fluid outlet pipe is perpendicular to the central axis of the body.

5. The spiral phase-change energy storage heat exchanger according to claim 4, characterized in that: A liquid discharge pipe is arranged at the bottom end of the lower cover.

6. The spiral phase-change energy storage heat exchanger according to claim 4, characterized in that: The upper cover and the body, as well as the lower cover and the body, are all flange-connected.

Images