Multi-side energy storage and heat exchange energy circulation system

Abstract

The utility model relates to a multi-side energy storage heat exchange energy circulation system which comprises a ground source heat pump unit, a first energy storage buried box and a second energy storage buried box, the first energy storage buried box and the second energy storage buried box are arranged on the two sides of the ground source heat pump unit, and a first water inlet pipeline and a first water outlet pipeline are arranged between the ground source heat pump unit and the first energy storage buried box. A first heat exchanger is arranged on the first water outlet pipeline, a second water inlet pipeline is arranged between the tail end of the first water outlet pipeline and an inlet of the second energy storage buried box, a second water outlet pipeline is arranged between an outlet of the second energy storage buried box and the first water inlet pipeline, a second heat exchanger is arranged on the second water outlet pipeline, and a cooling capacity displacer is arranged on the second water inlet pipeline. The technical key point is that the second water inlet pipeline is provided with a phase change energy storage pipe section in front of an inlet of the cooling capacity displacer. Ground source heat is fully utilized, energy waste is avoided, and energy supply is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage heat exchange, and particularly relates to an energy circulation system for multi-side energy storage heat exchange. Background Technique

[0002] At present, the research on energy storage heat exchange of ground source heat energy is becoming more and more extensive. The existing energy storage heat exchange system collects heat or cold through ground pipes vertically arranged in the soil. In winter, the heat energy in the stratum soil is exchanged with the above-ground heat exchange system, and in summer, the cold energy in the stratum soil is exchanged with the above-ground heat exchange system.

[0003] For example, CN 118242919 A discloses an energy circulation system for bilateral energy storage heat exchange. The left and right sides of a ground source heat pump are respectively connected to an energy storage end. Any one of the energy storage ends includes at least one energy storage ground box, and the other energy storage end includes an energy storage water tank and / or an energy storage ground box. The energy storage end is respectively connected to the ground source heat pump and the application end through a circulation pipeline. The ground box includes a box body structure and a heat exchange pipe network wall perpendicular to the bottom of the box body structure. The wall is provided with a heat exchange pipe network horizontally penetrating the wall. Each pipe network is provided with a pair of liquid inlet and outlet ports. A circulation pump is provided at the liquid outlet, and the start and stop of each pump are controlled by a control system. The pipe network is filled with a liquid circulation medium. The purpose of this system is to increase the energy storage density and improve the heat exchange efficiency, but there are the following problems: In winter, a large amount of ground source heat is wasted during the energy supply process, and the energy storage system still needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a structurally reasonable and reliable energy circulation system for multi-side energy storage heat exchange to solve the above problems, make full use of ground source heat, avoid energy waste, and improve energy supply.

[0005] The technical solution of the utility model is as follows:

[0006] An energy cycle system with multi-sided energy storage and heat exchange, comprising a ground source heat pump unit, a first energy storage buried box and a second energy storage buried box arranged on both sides of the ground source heat pump unit. A first water inlet pipeline and a first water outlet pipeline are provided between the ground source heat pump unit and the first energy storage buried box. A first heat exchanger is provided on the first water outlet pipeline. A second water inlet pipeline is provided between the end of the first water outlet pipeline and the inlet of the second energy storage buried box. A second water outlet pipeline is provided between the outlet of the second energy storage buried box and the first water inlet pipeline. A second heat exchanger is provided on the second water outlet pipeline. A cold quantity replacement device is provided on the second water inlet pipeline. The technical key point is that a phase change energy storage pipe section is provided in front of the inlet of the cold quantity replacement device on the second water inlet pipeline. The phase change energy storage pipe section comprises a plurality of pipe units connected end to end. The pipe unit comprises an outer pipe, an inner pipe, a phase change material arranged in the inner pipe, and a support column connecting the outer pipe and the inner pipe. The front end of the inner pipe is provided with a front reduced diameter port, and the rear end is provided with a rear reduced diameter port. Sealing membranes are provided at the inner ends of the front reduced diameter port and the rear reduced diameter port. The front reduced diameter port is provided with a first stop port connected to the rear reduced diameter port of the inner pipe of the adjacent pipe unit. The front end of the outer pipe is provided with a second stop port connected to the rear end of the outer pipe of the adjacent pipe unit. The outer pipe at the front end of the phase change energy storage pipe section is communicated with the second water inlet pipeline, and the outer pipe at the rear end is communicated with the inlet pipeline of the cold quantity replacement device. A bypass pipeline is connected between the front and rear ends of the phase change energy storage pipe section. An external heat exchange inlet pipe is provided on the side wall of the outer pipe at the front end of the phase change energy storage pipe section, and an external heat exchange outlet pipe is provided on the side wall of the outer pipe at the rear end.

[0007] In the above-mentioned energy cycle system with multi-sided energy storage and heat exchange, reversing valves are provided at both the starting point and the ending point of the bypass pipeline.

[0008] In the above-mentioned energy cycle system with multi-sided energy storage and heat exchange, phase change material extraction pipelines are respectively provided in each inner pipe of the phase change energy storage pipe section, and the outer ends of the respective phase change material extraction pipelines pass through the top surface of the outer pipe and are communicated by a converging pipeline.

[0009] In the above-mentioned energy cycle system with multi-sided energy storage and heat exchange, an anti-tilting platform is provided at the bottom of the phase change energy storage pipe section.

[0010] In the above-mentioned energy cycle system with multi-sided energy storage and heat exchange, a first sealing ring is provided on the bottom surface of the first stop port, and a second sealing ring is provided on the bottom surface of the second stop port.

[0011] The beneficial effects of the present utility model are:

[0012] On the basis of the prior art, a phase change energy storage pipe section is provided in front of the inlet of the cold energy replacement device in the second water inlet pipeline, further absorbing the waste heat in the second water inlet pipeline, and transferring the waste heat to the heat-using terminal in a timely manner through an external heat exchange inlet pipe and an external heat exchange outlet pipe. The phase change energy storage pipe section, the first heat exchanger, the second heat exchanger and the cold energy replacement device jointly form a multi-side energy storage heat exchange structure, making full use of the ground source heat, avoiding energy waste and improving the energy supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 a schematic structural diagram of the phase change energy storage pipe section in

[0015] Figure 3 a cross-sectional view of a pipe unit.

[0016] In the figure: 1. First energy storage buried box, 2. First water outlet pipeline, 3. Ground source heat pump unit, 4. Bypass pipeline, 5. Reversing valve, 6. External heat exchange inlet pipe, 7. Phase change energy storage pipe section, 701. Outer pipe, 702. Inner pipe, 703. Support column, 704. Interface, 705. Rear reduced diameter port, 706. Phase change material extraction and replacement pipeline, 707. Confluence pipeline, 708. Encapsulation and sealing film, 709. Encapsulation and sealing film, 710. Front reduced diameter port, 711. Second sealing ring, 712. First sealing ring, 713. Interface, 714. Anti-tilting platform; 8. External heat exchange outlet pipe, 9. Cold energy replacement device, 10. Second water inlet pipeline, 11. Second energy storage buried box, 12. Second water outlet pipeline, 13. Second heat exchanger, 14. Second lifting pump, 15. First lifting pump, 16. First water outlet pipeline, 17. First heat exchanger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0018] As Figures 1 to 3 shown, the energy circulation system for multi-side energy storage heat exchange includes a ground source heat pump unit 3, a first energy storage buried box 1 and a second energy storage buried box 11 provided on both sides of the ground source heat pump unit 3. A first water inlet pipeline 2 and a first water outlet pipeline 16 are provided between the ground source heat pump unit 3 and the first energy storage buried box 1. A first heat exchanger 17 is provided on the first water outlet pipeline 2. A second water inlet pipeline 10 is provided between the end of the first water outlet pipeline 2 and the inlet of the second energy storage buried box 11. A second water outlet pipeline 12 is provided between the outlet of the second energy storage buried box 11 and the first water inlet pipeline 2. A second heat exchanger 13 is provided on the second water outlet pipeline 12. A cold energy replacement device 9 is provided on the second water inlet pipeline 10.

[0019] Among them, a phase change energy storage pipe section 7 is provided in front of the inlet of the cold energy replacement device 9 on the second water inlet pipeline 10. The phase change energy storage pipe section 7 includes a plurality of pipe units connected end to end. The pipe unit includes an outer pipe 701, an inner pipe 702, a phase change material arranged in the inner pipe 702, and a support column 703 connecting the outer pipe 701 and the inner pipe 702.

[0020] A front reduced diameter port 710 is provided at the front end of the inner pipe 702, and a rear reduced diameter port 705 is provided at the rear end. Sealing membranes 708 and 709 are provided at the inner ends of the front reduced diameter port 710 and the rear reduced diameter port 705. The front reduced diameter port 710 is provided with a first stop port connected to the rear reduced diameter port 705 of the inner pipe 702 of the adjacent pipe unit, and the front end of the outer pipe 701 is provided with a second stop port connected to the rear end of the outer pipe 701 of the adjacent pipe unit. A first sealing ring 712 is provided on the bottom surface of the first stop port, and a second sealing ring 711 is provided on the bottom surface of the second stop port.

[0021] The outer pipe 701 at the front end of the phase change energy storage pipe section 7 is communicated with the second water inlet pipeline 10, and the outer pipe 701 at the rear end is communicated with the inlet pipeline of the cold energy replacement device 9. A bypass pipeline 4 is connected between the front and rear ends of the phase change energy storage pipe section 7. An interface 713 is provided on the side wall of the outer pipe 701 at the front end of the phase change energy storage pipe section 7 to be connected with an external heat exchange inlet pipe 6, and an interface 704 is provided on the side wall of the outer pipe 701 at the rear end to be connected with an external heat exchange outlet pipe 8. Commutating valves 5 are provided at both the starting point and the ending point of the bypass pipeline 4. Phase change material extraction pipelines 706 are respectively provided in the inner pipes 702 of the phase change energy storage pipe section 7, and the outer ends of the phase change material extraction pipelines 706 penetrate through the top surface of the outer pipe 701 and are communicated by a converging pipeline 707. In order to ensure the stable laying of the phase change energy storage pipe section 7, an anti-tilting platform 714 is provided at the bottom of the phase change energy storage pipe section 7 to ensure that the lower end of the phase change material extraction pipeline 706 faces downward.

[0022] Working principle:

[0023] The inlet of the heat exchange tube bundle in the first energy storage buried box 1 is communicated with the first water inlet pipeline 2, and the outlet is communicated with the first water outlet pipeline 16. Water enters through the first water inlet pipeline 2, exchanges heat through the heat exchange tube bundle in the first energy storage buried box 1, and is then discharged through the first water outlet pipeline 16. Under the action of the first lifting pump 15, it is sent to the first heat exchanger 17. The shell side of the first heat exchanger 17 absorbs heat and supplies heat to the first heat using terminal; the phase change energy storage pipe section 7 connected to the end of the first water outlet pipeline 16 absorbs the waste heat for the second heat using terminal; the water temperature of the water led out from the outer pipe 701 at the very end of the phase change energy storage pipe section 7 drops significantly, and the cold energy replacement device 9 absorbs the cold energy therein for the cold using terminal; finally, the water enters the heat exchange tube bundle in the second energy storage buried box 11 to store heat, and then is discharged through the second water outlet pipeline 12. Under the action of the second lifting pump 14, it is sent to the second heat exchanger 13. The shell side of the second heat exchanger 13 absorbs heat and supplies heat to the third heat using terminal.

[0024] When the water temperature of the water flow is relatively low after heat exchange in the first heat exchanger 17, such as in extremely low temperatures in winter, the water flowing out of the first heat exchanger 17 directly enters the cold energy replacement device 9 through the bypass pipeline 7.

[0025] When the heat storage amount in the phase change energy storage pipe section 7 is high, first, the water flowing out of the first heat exchanger 17 directly enters the cold energy replacement device 9 through the bypass pipeline 4. During this process, heat exchange water is injected into the outer pipe 701 through the external heat exchange inlet pipe 6 and the external heat exchange outlet pipe 8 and supplied to the second heat utilization terminal.

[0026] After the phase change material expires, the phase change material in each inner pipe 702 is first extracted through the phase change material extraction and replacement pipeline 706, and then new phase change material is injected through the phase change material extraction and replacement pipeline 706. Among them, the encapsulation and sealing films 708 and 709 have a certain volume compensation function, can adapt to the temperature difference change of the environment, and can also adapt to the volume change of the injected material.

[0027] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as used to limit the implementation scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope covered by this patent.

Claims

1. An energy circulation system with multi-side energy storage and heat exchange, comprising a ground source heat pump unit, a first energy storage underground box and a second energy storage underground box arranged on both sides of the ground source heat pump unit, a first water inlet pipeline and a first water outlet pipeline are arranged between the ground source heat pump unit and the first energy storage underground box, a first heat exchanger is arranged on the first water outlet pipeline, a second water inlet pipeline is arranged between the end of the first water outlet pipeline and the inlet of the second energy storage underground box, a second water outlet pipeline is arranged between the outlet of the second energy storage underground box and the first water inlet pipeline, a second heat exchanger is arranged on the second water outlet pipeline, and a cold capacity displacer is arranged on the second water inlet pipeline, characterized in that: The second water inlet pipeline is provided with a phase-change energy storage pipe section in front of the inlet of the cold displacer, and the phase-change energy storage pipe section includes a plurality of pipe units connected end to end, and the pipe unit includes an outer pipe, an inner pipe, a phase-change material arranged in the inner pipe, and a support column connected between the outer pipe and the inner pipe. The front end of the inner pipe is provided with a front reduction opening, and the rear end is provided with a rear reduction opening, and the inner ends of the front reduction opening and the rear reduction opening are provided with a packaging sealing film, the front reduction opening is provided with a first stop opening connected to the rear reduction opening of the inner pipe of the adjacent pipe unit, and the front end of the outer pipe is provided with a second stop opening connected to the rear end of the outer pipe of the adjacent pipe unit. The outer pipe at the front end of the phase-change energy storage pipe section is connected with the second water inlet pipeline, and the outer pipe at the rear end is connected with the inlet pipeline of the cold displacer, and a bypass pipeline is connected between the front and rear ends of the phase-change energy storage pipe section, and an external heat exchange inlet pipe is provided on the side wall of the outer pipe at the front end of the phase-change energy storage pipe section, and an external heat exchange outlet pipe is provided on the side wall of the outer pipe at the rear end.

2. The energy circulation system with multi-side energy storage and heat exchange according to claim 1 is characterized in that: The starting point and the end point of the bypass pipeline are both provided with reversing valves.

3. The energy circulation system with multi-side energy storage and heat exchange according to claim 1 is characterized in that: Phase change material extraction pipelines are respectively arranged in each inner tube of the phase change energy storage tube section, and the outer ends of each phase change material extraction pipeline pass through the top surface of the outer tube and are connected by a converging pipeline.

4. The energy circulation system with multi-side energy storage and heat exchange according to claim 1 is characterized in that: An anti-tilt platform is provided at the bottom of the phase-change energy storage pipe section.

5. The energy circulation system with multi-side energy storage and heat exchange according to claim 1 is characterized in that: A first sealing ring is disposed on the bottom surface of the first stop, and a second sealing ring is disposed on the bottom surface of the second stop.

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