A cold-heat compensation type metro station enclosure coupled energy plate-heat pump air conditioning system

Abstract

The utility model discloses a cold and hot compensation type subway station enclosure structure coupling type energy board - heat pump air conditioning system, including heat pump unit, user end, enclosure structure coupling type energy board, cooling tower, solar energy hot water system, user inlet pipe, user outlet pipe, user water pump, source side outlet water main pipe, source side inlet water main pipe, energy board inlet pipe, energy board outlet pipe, energy board water pump, cooling tower inlet pipe, cooling tower outlet pipe, cooling tower water pump, solar energy inlet pipe, solar energy outlet pipe, solar energy water pump and three -way regulating valve. The system can realize the heat release or heat absorption to the rock and soil around the subway station by the pipe -in -pipe heat exchange in the subway station enclosure structure, and further efficiently supplies heat and refrigeration for the subway station, and simultaneously realizes the heat balance control of the system through the combined operation of the solar energy hot water system and the cooling tower.

Description

Technical Field

[0001] This utility model relates to the field of geothermal energy high-efficiency utilization technology, specifically to a cold and heat compensation type subway station enclosure structure coupled energy plate-heat pump air conditioning system. Background Technology

[0002] Shallow and medium-deep geothermal energy development are key areas for large-scale geothermal energy development. Ground source heat pump technology is the primary utilization form of shallow geothermal energy development, a mature technology widely used in North America and Europe. However, this technology suffers from problems such as large land area requirements for borehole-buried pipes, uneven heating and cooling, difficulty in achieving 100% groundwater reinjection, impact on surface water resources, and high initial investment, severely hindering its further promotion in urban areas. To address the problems of traditional ground source heat pump technology in practical applications, the underground energy structure ground source heat pump system is derived from buried pipe ground source heat pump engineering. The difference lies in using an underground energy structure instead of a buried pipe heat exchanger. By embedding an underground loop pipe system in the building foundation components and underground structures, an underground heat exchanger is formed, extracting or releasing energy from the strata at a certain depth within the underground structure itself, which maintains a constant temperature year-round.

[0003] By replacing heat pipes within the underground civil structure of subway stations, shallow geothermal energy can be fully utilized to provide heating and cooling for the stations. Due to diverse climates, subway stations that only provide cooling throughout the year or whose cooling and heating demands are inconsistent may experience an imbalance between heating and cooling loads. Over long-term operation, this can lead to fluctuations in the constant temperature of the soil layer, which may in turn affect the system's heat exchange efficiency. Utility Model Content

[0004] To achieve the above technical objectives, this utility model provides a cooling and heating compensation type subway station enclosure structure coupled energy plate-heat pump air conditioning system, including a heat pump unit, civil structure, source-side heat exchange loop, user-side heat exchange loop, auxiliary cooling and heating compensation loop and monitoring and control system; The civil engineering structure is equipped with heat exchange pipes, which are arranged in at least one series pipe unit. The source-side heat exchange loop is as follows: the outlet of the series buried pipe unit is connected to the source-side water inlet pipe of the heat pump unit through the energy plate water outlet pipe, and the source-side water outlet pipe of the heat pump unit is connected to the inlet of the series buried pipe unit through the energy plate water inlet pipe, thus forming a source-side heat exchange loop. The user-end heat exchange loop: The user inlet water pipe and user outlet water pipe of the heat pump unit are connected to the user terminal to form a user-end heat exchange loop; The auxiliary hot and cold compensation circuit: the cooling tower is connected in parallel between the source-side outlet main pipe and the source-side inlet main pipe through the cooling tower inlet pipe and the cooling tower outlet pipe; the solar water heating system is connected in parallel between the source-side outlet main pipe and the source-side inlet main pipe through the solar water inlet pipe and the solar water outlet pipe. The monitoring and control system includes sensors for monitoring water temperature and flow rate on the source-side inlet pipe, source-side outlet pipe, energy plate outlet pipe, cooling tower outlet pipe, and solar water outlet pipe. The data collected by the sensors is transmitted to the intelligent monitoring platform. Pumps regulated by frequency converters are installed on the energy plate outlet pipe, solar water outlet pipe, cooling tower outlet pipe, and user outlet pipe.

[0005] Furthermore, the civil engineering structure includes the subway station floor slab, top and bottom continuous underground walls; the heat exchange buried pipes are laid at intervals of 1 m.

[0006] Furthermore, the cooling tower is a closed-loop tower.

[0007] Furthermore, regulating valves are provided on the energy panel water outlet pipe, solar water outlet pipe, cooling tower water outlet pipe, user water outlet pipe, source-side water inlet main pipe, source-side water outlet main pipe, user water inlet pipe, and user water outlet pipe.

[0008] The cold and heat compensation type subway station enclosure structure coupled energy panel-heat pump air conditioning system provided by this utility model can achieve a relatively constant soil temperature during long-term operation. The specific strategy is as follows: (1) The annual cooling load is equal to the annual heating load, so an independent heating and cooling strategy using energy panels is recommended; (2) If the annual cooling load is greater than the annual heating load, a combined operation strategy of cooling towers should be adopted, and the cooling towers should be turned on for auxiliary heat dissipation during the summer cooling operation. (3) If the annual cooling load is less than the annual heating load, a combined operation strategy of solar water heating system should be adopted, and the solar water heating system should be turned on for auxiliary heating during the winter heating season; (4) At the same time, the daily operation strategy is flexibly adjusted according to the monitoring data of the monitoring sensor to ensure that the water temperature of the buried pipe in the summer cooling condition does not exceed 33℃.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) By using the enclosure structure of the subway station (such as the base plate and continuous wall) to implant heat exchange tubes, an energy plate heat exchanger is formed, which saves the additional drilling and land occupation required by the traditional ground source heat pump, and greatly saves urban underground space.

[0010] (2) By introducing a combined compensation mechanism of cooling tower and solar water heating system, the soil is actively heated or discharged, which effectively solves the problem of soil thermal imbalance caused by uneven heating and cooling loads of subway stations and ensures the long-term efficient and stable operation of the system.

[0011] (3) The closed-loop buried pipe heat exchange method is adopted, which only exchanges heat with the soil and rock and does not extract groundwater at all, thus fundamentally avoiding the problem that traditional groundwater source heat pump systems are difficult to reinject and affect groundwater resources.

[0012] (4) The intelligent monitoring platform uses deep neural network algorithms to optimize and control frequency converters such as heat pumps, water pumps, and cooling towers and three-way valves in real time, realizing intelligent and efficient operation of the system and significantly reducing energy consumption and operating costs.

[0013] (5) The heat exchange system is designed and constructed in an integrated manner with the subway civil structure, which saves the expensive drilling costs, reduces the initial investment, and is more economical, providing a solution for the large-scale promotion of ground source heat pump technology in urban subways. Attached Figure Description

[0014] Figure 1 Schematic diagram of a coupled energy panel-heat pump air conditioning system for the enclosure structure of a subway station with heat and cold compensation.

[0015] 1-Heat pump unit; 2-User terminal; 3-Envelope coupled energy panel; 4-Cooling tower; 5-Solar water heating system; 6-User inlet pipe; 7-User outlet pipe; 8-User water pump; 9-Source-side main inlet pipe; 10-Source-side main outlet pipe; 11-Energy panel inlet pipe; 12-Energy panel outlet pipe; 13-Energy panel water pump; 14-Cooling tower inlet pipe; 15-Cooling tower outlet pipe; 16-Cooling tower water pump; 17-Solar water inlet pipe; 18-Solar water outlet pipe; 19-Solar water pump; 20-Three-way regulating valve; 21-Monitoring sensor; 22-Smart monitoring platform Figure 2 One method for arranging buried pipes in coupled energy plate heat exchangers within the building envelope.

[0016] Figure 3 Method 2: Coupled Energy Plate Heat Exchanger Buried Pipe Layout in Enclosure Structure

[0017] Figure 4 The third method is the arrangement of buried pipes for coupled energy plate heat exchangers in the building envelope.

[0018] Figure 5 The arrangement of embedded pipes for coupled energy plate heat exchangers in the enclosure structure of subway stations.

[0019] Figure 6 The impact of buried pipe spacing on the cooling capacity of the energy plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0021] Example 1: This example describes a cooling and heating compensation type subway station enclosure structure coupled with an energy panel-heat pump air conditioning system, such as... Figure 1As shown, it includes a heat pump unit 1, a user terminal 2, an envelope-coupled energy panel 3, a cooling tower 4, a solar water heating system 5, a user inlet pipe 6, a user outlet pipe 7, a user water pump 8, a source-side inlet main pipe 9, a source-side outlet main pipe 10, an energy panel inlet pipe 11, an energy panel outlet pipe 12, an energy panel water pump 13, a cooling tower inlet pipe 14, a cooling tower outlet pipe 15, a cooling tower water pump 16, a solar water inlet pipe 17, a solar water outlet pipe 18, a solar water pump 19, and a three-way regulating valve 20.

[0022] The energy plate inlet pipe 11 and energy plate outlet pipe 12 of the coupled energy plate 3 of the enclosure structure are respectively connected to the source-side outlet water main pipe 10 and the source-side inlet water main pipe 9 of the heat pump unit 1 to form a source-side heat exchange loop. The source-side outlet water main pipe 10 supplies water to the cooling tower 4 and the solar water heating system 5 through the cooling tower inlet water pipe 14 and the solar water inlet water pipe 17, respectively. The cooling tower outlet water pipe 15 of the cooling tower inlet water pipe 14 and the solar water outlet water pipe 18 of the solar water inlet water pipe 17 are respectively connected to the source-side inlet water main pipe 9 through a three-way regulating valve 20. The cooling tower outlet water pipe 15 and the solar water outlet water pipe 18 are respectively equipped with a cooling tower water pump 16 and a solar water pump 19. The user inlet water pipe 6 and the user outlet water pipe 7 of the heat pump unit 1 are connected to the user terminal 2 to form a user-side heat exchange loop. The source-side heat exchange loop and the user-side heat exchange loop exchange heat in the heat pump unit 1.

[0023] Monitoring sensors 21 are installed on the source-side water inlet pipe 9, the source-side water outlet pipe 10, the energy plate water outlet pipe 12, the cooling tower water outlet pipe 15, and the solar water outlet pipe 18. The monitoring sensors 21 include sensors that monitor water temperature and flow rate. The data collected by the monitoring sensors 21 are all transmitted to the intelligent monitoring platform 22.

[0024] like Figure 5 As shown, the enclosing structure coupled energy panel 3 includes a civil structure 302 and heat exchange pipes 301 laid in the civil structure 302. The civil structure 302 includes the subway station floor slab, top and bottom diaphragm walls. The heat exchange pipes 301 are arranged in series as pipe units with a spacing of 1m. The outlet and inlet of the series pipe unit are connected to the energy panel outlet pipe 12 and the energy panel inlet pipe 11, respectively.

[0025] The cooling tower 4 is a closed tower.

[0026] The user water pump 8, energy plate water pump 13, cooling tower water pump 16, and solar water pump 19 are all regulated by frequency converters; the three-way regulating valve 20 has the ability to adjust the flow ratio of the outlet branch pipe; the equipment operation information of the heat pump unit 1, cooling tower 4, user water pump 8, energy plate water pump 13, cooling tower water pump 16, solar water pump 19, and three-way regulating valve 20 are all transmitted to the intelligent monitoring platform 22; The specific adjustment methods are as follows: when the annual cooling load equals the annual heating load, the independent heating and cooling strategy of the building envelope coupled energy panel 3 is adopted; when the annual cooling load is greater than the annual heating load, the cooling tower joint operation strategy should be adopted, and the cooling tower 4 should be turned on for auxiliary heat dissipation during the summer cooling operation; when the annual cooling load is less than the annual heating load, the solar water heating system 5 should be adopted, and the solar water heating system should be turned on for auxiliary heat supplementation during the winter heating operation.

[0027] The daily operating strategy is flexibly adjusted based on the monitoring data from the sensors to ensure that the outlet water temperature of the buried pipes does not exceed 33℃ during summer cooling operation.

[0028] Comparative Example 1 The heat exchanger buried pipes 301 are arranged in series as buried pipe units with a spacing of 2 m, while other conditions remain unchanged. For example... Figure 6 As shown, when the pipe spacing is 1 m, the cooling capacity of the energy plate is significantly greater than that when the pipe spacing is 2 m.

[0029] Although the above embodiments have described the present utility model and its implementation in detail, it should be noted that for those skilled in the art, any changes, modifications, substitutions, combinations, simplifications, etc., made to the corresponding conditions without departing from the technical principles of the present utility model should be considered as equivalent substitutions, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A cooling and heating compensation type subway station envelope coupled energy panel-heat pump air conditioning system, characterized in that, This includes heat pump units, civil engineering structures, source-side heat exchange loops, user-side heat exchange loops, auxiliary cooling and heating compensation loops, and monitoring and control systems. The civil engineering structure is equipped with heat exchange pipes, which are arranged in at least one series pipe unit. The source-side heat exchange loop is as follows: the outlet of the series buried pipe unit is connected to the source-side water inlet pipe of the heat pump unit through the energy plate water outlet pipe, and the source-side water outlet pipe of the heat pump unit is connected to the inlet of the series buried pipe unit through the energy plate water inlet pipe, thus forming a source-side heat exchange loop. The user-end heat exchange loop: The user inlet water pipe and user outlet water pipe of the heat pump unit are connected to the user terminal to form a user-end heat exchange loop; The auxiliary hot and cold compensation circuit includes a cooling tower and a solar water heating system. The cooling tower is connected in parallel between the source-side outlet main pipe and the source-side inlet main pipe through a cooling tower inlet pipe and a cooling tower outlet pipe. The solar water heating system is connected in parallel between the source-side outlet main pipe and the source-side inlet main pipe through a solar water inlet pipe and a solar water outlet pipe. The monitoring and control system includes sensors for monitoring water temperature and flow rate on the source-side inlet pipe, source-side outlet pipe, energy plate outlet pipe, cooling tower outlet pipe, and solar water outlet pipe. The data collected by the sensors is transmitted to the intelligent monitoring platform. Pumps regulated by frequency converters are installed on the energy plate outlet pipe, solar water outlet pipe, cooling tower outlet pipe, and user outlet pipe.

2. The system according to claim 1, characterized in that, The civil engineering structure includes the subway station floor slab, top and bottom continuous underground walls; the heat exchange buried pipes are laid at 1 m intervals.

3. The system according to claim 1, characterized in that, The cooling tower is a closed-type tower.

4. The system according to claim 1, characterized in that, The energy panel water outlet pipe, solar water outlet pipe, cooling tower water outlet pipe, user water outlet pipe, source-side water inlet main pipe, source-side water outlet main pipe, user water inlet pipe, and user water outlet pipe are all equipped with regulating valves.

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