Railway station building deep geothermal coupling light storage and heat storage heating system

Abstract

The utility model relates to a kind of railway station building middle-deep geothermal coupling light storage and heat storage heating system, including middle-deep geothermal coupling heat storage heating system, user end and light storage unit, middle-deep geothermal coupling heat storage heating system includes heat pump, heat exchanger, heat storage water tank and buried pipe, user end includes radiation coil, and light storage unit includes photovoltaic module and power grid;Buried pipe is accessed heat pump and heat exchanger, heat pump is accessed heat storage water tank and radiation coil, heat exchanger is accessed heat storage water tank, heat storage water tank is accessed radiation coil, and multiple heat supply cycles are formed;Light storage unit is accessed middle-deep geothermal coupling heat storage heating system and user end, and electrical energy is provided using photovoltaic module and power grid.The utility model combines middle-deep geothermal energy, solar energy and energy system flexible energy supply technology, energy storage technology in depth, meets building heating demand, effectively improves the energy utilization efficiency of middle-deep buried pipe heating system, realizes renewable energy reasonable configuration, achieves the effect of complementary advantages between different energy.

Description

Technical Field

[0001] This utility model relates to the field of railway station heating technology, specifically to a deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in railway station buildings. Background Technology

[0002] As a typical example of public transportation buildings, railway station buildings present a particularly prominent energy supply and demand contradiction due to their unique characteristics, such as large building footprint, high passenger density and frequent flow, and complex functional zoning. Against this backdrop, exploring clean and renewable energy supply systems adapted to the operational characteristics of railway station buildings has become a key issue that urgently needs to be addressed in the field of building energy conservation.

[0003] In recent years, the medium-deep geothermal energy extraction device-ground source heat pump coupled system has emerged as a new geothermal energy utilization technology, achieving a breakthrough in geothermal energy development models. This system deploys dedicated heat extraction devices at depths of 2-3 km underground, extracting low-grade heat energy from deep soil and rock using closed-loop heat exchange technology. Leveraging the energy quality enhancement function of the ground source heat pump, this low-grade heat energy is converted into high-grade heat energy that can directly meet the heating needs of buildings. Compared to traditional shallow geothermal energy utilization technologies, this system offers significant technical advantages such as high heat extraction intensity, stable and continuous heating, small land footprint, and no risk of groundwater disturbance, providing a feasible technical solution for large-scale clean heating of large public buildings (such as railway stations).

[0004] While the combined "medium-deep geothermal energy + solar energy" energy supply model offers a new approach to clean heating for railway stations, the current technological system still faces three key challenges: First, the challenge of coordinating and regulating energy output fluctuations. Solar energy is significantly affected by meteorological factors such as day-night cycles and weather changes, exhibiting inherent defects such as strong randomness in energy output, poor supply continuity, and difficulty in regulation. In contrast, medium-deep geothermal energy heating systems possess the technical characteristics of high output stability and strong continuity. How to effectively mitigate solar energy fluctuations through medium-deep geothermal energy and construct a complementary energy balance mechanism of "stable energy supply - intermittent energy supply" is the core challenge in ensuring the overall reliability of the system's energy supply. Second, the issue of optimizing the operational energy efficiency of medium-deep geothermal energy systems. Railway stations are affected by the work and rest patterns of personnel, exhibiting a typical operating condition characterized by a sharp drop in heating load at night. How to fully exploit the intermittent heat storage characteristics of medium-deep geothermal pipes, establish a system operation strategy that adapts to the load change patterns of the station, and achieve synergistic optimization of the heat extraction, heat storage, and heat release processes of medium-deep geothermal energy, thereby improving the overall energy utilization efficiency of the system, remains a weak link in current technological research. Summary of the Invention

[0005] The purpose of this invention is to provide a deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system for railway stations, in order to mitigate the fluctuations in renewable energy and improve energy utilization efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A medium-deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system is provided for railway station buildings. The system includes a medium-deep geothermal coupled thermal energy storage heating system, a user terminal, and a photovoltaic energy storage unit. The medium-deep geothermal coupled thermal energy storage heating system includes a heat pump, a heat exchanger, a hot water storage tank, and buried pipes. The user terminal includes radiant coils. The photovoltaic energy storage unit includes photovoltaic modules and a power grid.

[0008] The buried pipe is connected to the heat pump and the heat exchanger, the heat pump is connected to the hot water storage tank and the radiant coil, the heat exchanger is connected to the hot water storage tank, and the hot water storage tank is connected to the radiant coil, forming multiple heating cycles;

[0009] The photovoltaic energy storage unit is connected to the medium-deep geothermal coupled thermal energy storage and heating system and the user terminal, and uses the photovoltaic modules and the power grid to provide electricity.

[0010] Furthermore, the buried pipe, the heat exchanger, the hot water storage tank, and the radiant coil form the first heating cycle.

[0011] Furthermore, the buried pipe, the heat pump, and the radiant coil form a second heating cycle.

[0012] Furthermore, the underground pipe, the heat pump, and the hot water storage tank constitute a third heating cycle.

[0013] Furthermore, the buried pipe, the heat pump, the hot water storage tank, and the radiant coil form a fourth heating cycle, wherein the heat pump and the hot water storage tank are simultaneously connected to the radiant coil.

[0014] Furthermore, the hot water storage tank and the radiant coil form a fifth heating cycle.

[0015] Furthermore, electric regulating valves are installed in the pipelines of multiple heating cycles.

[0016] Furthermore, a heat source-side water pump is installed on the pipeline at the output end of the buried pipe, a user-side water pump is installed on the pipeline at the output end of the heat pump, a hot water storage pump is installed on the pipeline at the input end of the hot water storage tank, and a hot water discharge pump is installed on the pipeline at the output end of the hot water storage tank.

[0017] Furthermore, a temperature monitoring instrument is installed on the pipeline at the output end of the buried pipe.

[0018] Furthermore, an indoor temperature monitoring instrument is installed in the heating space of the user terminal.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model discloses and provides a heating system for railway station buildings that couples deep geothermal energy with solar energy storage and thermal energy storage. Its core lies in the organic integration and deep consolidation of renewable deep geothermal energy, solar energy, flexible energy supply technology, and energy storage technology. On the one hand, the system fully utilizes deep geothermal energy resources to meet the building's heating needs. On the other hand, it combines the energy storage characteristics of deep geothermal energy, hot water storage tanks, and the large space to construct and formulate targeted, dedicated operation and control strategies. This deeply explores the flexible energy supply potential of deep geothermal energy and leverages the thermal inertia of the large space in railway station buildings to achieve precise demand response during the heating process, effectively improving the energy utilization efficiency of the deep geothermal buried pipe heating system. Simultaneously, by utilizing the stability of deep geothermal energy and the heat load characteristics of the station building, the system can effectively absorb fluctuating photovoltaic power, forming and constructing a flexible interaction mode and mechanism with the power grid, ultimately achieving efficient and rational utilization and optimized allocation of renewable energy, and achieving complementary advantages among multiple energy sources. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a system schematic diagram of this utility model.

[0023] Figure 2 This is a schematic diagram of intermittent thermal storage and preheating in medium-deep underground pipes.

[0024] Figure 3 This is a schematic diagram of a medium-deep underground pipe heat pump heating system.

[0025] Figure 4 This is a schematic diagram of the heat storage of a medium-deep underground pipe heating system.

[0026] Figure 5 This is a schematic diagram of a combined heating system for a medium-deep underground pipe heat pump coupled with a thermal storage device.

[0027] Figure 6 This is a diagram showing a separate heating system for a hot water storage tank.

[0028] The diagram is labeled as follows:

[0029] 1-Heat pump, 2-Heat exchanger, 3-Hot water storage tank, 4-Buried pipe, 5-Radiant coil, 6-High space, 7-Photovoltaic module, 8-Energy storage unit, 9-Inverter, 10-Distribution cabinet, 11-Power grid, 12-Temperature monitoring instrument, 13-Heat source side water pump, 14-First electric regulating valve, 15-Second electric regulating valve, 16-Third electric regulating valve, 17-Fourth electric regulating valve, 18-Fifth electric regulating valve, 19-Sixth electric regulating valve, 20-User side water pump, 21-Seventh electric regulating valve, 22-Indoor temperature monitoring instrument, 23-Eighth electric regulating valve, 24-Ninth electric regulating valve, 25-Tenth electric regulating valve, 26-Hot water storage pump, 27-Hot water discharge pump;

[0030] 101-Medium-deep geothermal coupled thermal storage and heating system, 102-User end, 103-Photovoltaic storage unit. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] In the description of this utility model, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0033] It should also be noted that although the order of steps is mentioned in the method description, in some cases, steps may be performed in a different order than that described here, and this should not be interpreted as a restriction on the order of steps.

[0034] This invention couples medium-deep geothermal heating technology, solar photovoltaic technology, and energy storage technology to achieve efficient heating for high-speed railway stations. It utilizes the intermittent heat storage characteristics of the medium-deep buried pipes to achieve efficient utilization of the medium-deep geothermal heating system, realize the efficient and rational utilization and optimized allocation of renewable energy, achieve the complementary advantages among multiple energy sources, and balance the impact of electricity price changes on costs.

[0035] Specifically, this utility model provides a deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system for railway station buildings, such as... Figure 1 The system includes a medium-deep geothermal coupled thermal storage and heating system 101, a user terminal 102, and a photovoltaic energy storage unit 103.

[0036] The medium-deep geothermal coupled thermal storage and heating system 101 includes a heat pump 1, a heat exchanger 2, a hot water storage tank 3, and a buried pipe 4, and is equipped with related pipelines, electric regulating valves, and water pumps.

[0037] User terminal 102 is the railway station building of the high-speed rail station. Radiation coils 5 are installed in the high space 6, along with related pipelines, electric regulating valves and water pumps.

[0038] The photovoltaic-storage unit 103 includes photovoltaic modules 7 and a power grid 11. Photovoltaic modules 7 are connected to an energy storage unit 8 and an inverter 9, with the inverter 9 connected to a distribution cabinet 10. Simultaneously, the power grid 11 is connected to the distribution cabinet 10. The distribution cabinet 10 controls the output of electrical energy.

[0039] In the above system, the buried pipe 4 is connected to the heat pump 1 and the heat exchanger 2. The heat pump 1 is connected to the hot water storage tank 3 and the radiant coil 5. The heat exchanger 2 is connected to the hot water storage tank 3, and the hot water storage tank 3 is connected to the radiant coil 5, forming multiple heating cycles. The photovoltaic-storage unit 103 is connected to the medium-deep geothermal coupled thermal storage and heating system 101 and the user terminal 102, and uses photovoltaic modules 7 and the power grid 11 to provide electricity.

[0040] The deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in railway station buildings of this utility model specifically includes the following heating cycles:

[0041] The first heating cycle consists of 1, 4 buried pipes, 2 heat exchangers, 3 hot water storage tanks, and 5 radiant coils.

[0042] 2. The underground pipe 4, heat pump 1, and radiant coil 5 form the second heating cycle.

[0043] 3. The underground pipe 4, the heat pump 1, and the hot water storage tank 3 form the third heating cycle.

[0044] 4. The buried pipe 4, heat pump 1, hot water storage tank 3 and radiant coil 5 form the fourth heating cycle, wherein heat pump 1 and hot water storage tank 3 are connected to radiant coil 5 at the same time.

[0045] 5. The hot water storage tank 3 and the radiant coil 5 form the fifth heating cycle.

[0046] Each cycle consists of related equipment and pipeline connections. By opening and closing the electric regulating valves installed on the pipelines, it is possible to switch between different cycles to achieve the switching of different operating modes.

[0047] In addition, a temperature monitoring instrument 12 is installed at the output end of the buried pipe 4 in the system to detect the output temperature of the buried pipe 4, and an indoor temperature monitoring instrument 22 is installed at the input end of the radiant coil to detect the input temperature of the radiant coil. The operating mode of the system can also be switched based on the temperature detection results.

[0048] The deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in the aforementioned railway station buildings has the following operating modes, and its operation is controlled through targeted control strategies.

[0049] 1. Intermittent thermal storage and preheating mode of medium-deep buried pipes

[0050] S1: As Figure 2 In the evening, the electric regulating valves at the input and output ends of heat pump 1 are closed, and the medium-deep geothermal coupling heat storage and heating system 101 uses the medium-deep buried pipe 4 as a high-temperature hot water storage tank to absorb high-temperature ground heat.

[0051] S2: Before the railway station building is put into operation, the first electric regulating valve 14 and the fourth electric regulating valve 17 on the source side are opened, and the eighth electric regulating valve 23 and the ninth electric regulating valve 24 on the user side are opened to start the first heating cycle. The high temperature water in the buried pipe 4 is exchanged through the heat exchanger 2 in the form of small flow on the buried pipe side and large flow on the hot water storage tank side. The heat is stored in the hot water storage tank 3 and the railway station building is preheated through the hot water storage tank 3.

[0052] Specifically, considering the characteristic of reduced heating temperature in railway station buildings at night, when the medium-deep geothermal heating system maintains a low-load operation at night, only a few buried pipes in the medium-deep buried pipe group need to be opened, and the circulating fluid in the remaining medium-deep buried pipes no longer flows. At this time, the medium-deep buried pipes can be regarded as high-temperature hot water storage tanks, and the medium water in buried pipe 4 continuously absorbs the heat from the high-temperature stratum. One hour before the official operation of the high-speed railway station, the second electric regulating valve 15, the third electric regulating valve 16, the tenth electric regulating valve 25, and the sixth electric regulating valve 19 are closed. The heat source side water pump 13, the hot water storage tank pump 26, the first electric regulating valve 14, and the fourth electric regulating valve 17 are turned on. High-temperature water in the buried pipe 4 is transferred through the heat exchanger 2 at a low flow rate on the buried pipe side and a high flow rate through the heat storage device, storing the heat in the hot water storage tank 3. The fifth electric regulating valve 18, the seventh electric regulating valve 21, the eighth electric regulating valve 23, and the ninth electric regulating valve 24 are then turned on to preheat the railway station building through the hot water storage tank 3, raising the waiting hall temperature to 20℃. The temperature of the water outlet from the buried pipe is measured using the temperature monitoring instrument 12. When the temperature drops to 35℃, the first electric regulating valve 14 and the fourth electric regulating valve 17 are closed to stop the direct heat release process from the buried pipe 4 and prevent further decrease in the water outlet temperature. After the high-speed railway station officially begins operation, the thermal inertia of the geothermal coil enclosure structure installed in the high space will be utilized to maintain indoor thermal comfort (room temperature 20℃), while reducing the power exchange with the power grid during this period. Indoor temperature monitoring instrument 22 monitors the temperature of the waiting hall. When the indoor temperature drops to 16℃, heat pump 1 will be turned on for heating, which is the second heating cycle mode.

[0053] 2. Medium-deep buried pipe heat pump heating mode

[0054] S1: As Figure 3 When the railway station building begins operation, and the output temperature of the underground pipe 4 measured by the temperature monitoring instrument 12 drops to the preset temperature, the first electric regulating valve 14 and the fourth electric regulating valve 17 are further closed to stop the underground pipe 4 from storing heat in the hot water storage tank 3.

[0055] S2: When the input temperature of the radiant coil 5 drops to the preset temperature, open part of the electric regulating valve at the output end of the heat pump 1 to start the second heating cycle and heat the railway station building through the heat pump 1.

[0056] Specifically, turn on the heat source side water pump 13, the second electric regulating valve 15, the third electric regulating valve 16, and the user side water pump 20, the sixth electric regulating valve 19, the ninth electric regulating valve 24, the eighth electric regulating valve 23, and the tenth electric regulating valve 25 to start the heat pump 1 for heating and maintain the indoor temperature at 16℃-18℃.

[0057] 3. Thermal storage mode of medium-deep underground pipe heating system

[0058] S1: As Figure 4 During periods of low electricity prices, some of the electric regulating valves at the input and output ends of heat pump 1 are opened, and the electric regulating valve on the heat release side of hot water storage tank 3 is also opened to start the third heating cycle.

[0059] S2: Use the electrical energy from the power grid 11 in the photovoltaic energy storage unit 103 to drive the heat pump 1 and store the thermal energy in the hot water storage tank 3.

[0060] Specifically, after the high-speed rail station closes for the day, the second electric regulating valve 15, the third electric regulating valve 16, the heat source side water pump 13 are opened, the tenth electric regulating valve 25, the fifth electric regulating valve 18, the seventh electric regulating valve 21, the sixth electric regulating valve 19, and the user side water pump 20 are opened, and the first electric regulating valve 14, the fourth electric regulating valve 17, the eighth electric regulating valve 23, and the ninth electric regulating valve 24 are closed. At night, the heat pump 1 is driven by off-peak electricity to generate heat and store it in the hot water storage tank 3, using the peak-valley electricity price difference for demand response.

[0061] 4. Combined heating mode of medium-deep buried pipe heat pump coupled with thermal storage device

[0062] S1: As Figure 5 The fourth heating cycle is started, and the railway station building is heated by the underground pipe 4, heat pump 1 and hot water storage tank 3.

[0063] S2: When the heat load is at its lowest and solar radiation is strong, the solar energy storage unit 103 provides power to the heat pump 1 and heats the railway station building at the same time. Excess heat is stored in the hot water storage tank 3.

[0064] S3: When the heat load is at its peak and the solar radiation is weak, the railway station building is heated simultaneously by the heat pump 1 and the hot water storage tank 3. The electricity from the photovoltaic module 7 in the photovoltaic storage unit 103 and the power grid 11 provide power for the operation of the heat pump 1.

[0065] Specifically, the peak of photovoltaic power generation on sunny days is generally at noon, while the peak heat load of railway station buildings occurs in the morning and evening. This mismatch means that excess photovoltaic power can be used to drive heat pumps to produce excess hot water, which is then stored in thermal storage devices. The remaining electricity is stored in batteries. In the morning and evening, the thermal storage devices can provide some of the heat load, reducing the need for deep underground pipes and the installed capacity of heat pumps. More specifically, since the lowest heat load in station buildings typically occurs at noon in winter, when outdoor temperatures are higher and solar radiation is at its peak, a mismatch exists between photovoltaic power and the station's electricity demand, leading to a large amount of photovoltaic power being connected to the grid. At this time, the heat source side closes the first electric regulating valve 14 and the fourth electric regulating valve 17, and opens the second electric regulating valve 15 and the third electric regulating valve 16. On the heat user side, the tenth electric regulating valve 25, the eighth electric regulating valve 23, and the ninth electric regulating valve 24 are opened. The sixth electric regulating valve 19, the user-side water pump 20, and the heat pump unit operate at full load. When the user-side temperature 22 reaches the corresponding temperature, the fifth electric regulating valve 18 and the seventh electric regulating valve 21 are opened, allowing excess heat to be stored in the hot water storage tank 3. The heat storage device assists the energy storage device in absorbing excess photovoltaic power generation. In addition, in the afternoon, as the outdoor temperature gradually decreases and the heat load of the station increases, the heat pump alone can no longer meet the full heat load demand of the station. At this time, the seventh electric regulating valve 21 is closed, and the hot water discharge pump 27 on the heating side of the water tank is opened. The medium-deep buried pipe heat pump is coupled with the heat storage device for joint heating. The medium-deep buried pipe heat pump provides the base load, and the heat storage device performs peak shaving.

[0066] 5. Individual heating mode for thermal storage tanks

[0067] like Figure 6 During peak electricity price periods, the electric regulating valve at the input end of heat pump 1 is closed, and the electric regulating valve on the heat release side of hot water storage tank 3 is opened to start the fifth heating cycle, which heats the railway station building through hot water storage tank 3.

[0068] Specifically, during peak electricity price periods and when photovoltaic power generation begins to fall below the power demand of the station, the heat pump's heat storage mode for the hot water tank is stopped. Instead, the heat stored during the midday period from absorbing photovoltaic power is used for heating, improving the system's operational economy. At this time, the first electric regulating valve 14, the second electric regulating valve 15, the third electric regulating valve 16, the fourth electric regulating valve 17, the seventh electric regulating valve 21, the tenth electric regulating valve 25, and the sixth electric regulating valve 19 are closed, while the fifth electric regulating valve 18, the eighth electric regulating valve 23, and the ninth electric regulating valve 24 are opened. The hot water pump 27 of the hot water tank is then turned on, allowing the hot water tank 3 to provide independent power.

[0069] This utility model's system combines renewable energy sources such as deep geothermal energy and solar energy, flexible energy supply technology, and energy storage technology. It fully utilizes deep geothermal energy resources for building heating and proposes an operation control strategy based on the energy storage characteristics of deep geothermal energy, hot water storage tanks, and large spaces. It possesses the following technical advantages:

[0070] 1. Considering the actual operating conditions of the medium-deep geothermal system and the reduced heating demand at railway stations during nighttime: During the nighttime heat pump shutdown period, the medium-deep buried pipe can be equivalent to a "high-temperature hot water storage tank." During this stage, the circulating medium water inside the pipe will continuously absorb the heat released by the high-temperature strata, which can effectively increase the evaporation temperature on the heat source side of the heat pump and further optimize the overall energy utilization efficiency of the medium-deep buried pipe heating system.

[0071] 2. The thermal storage function of the medium-deep heating system can specifically address the pain point of "temporal and spatial mismatch between photovoltaic output and heat load." Its core technological advantages are reflected in three aspects: First, it resolves the supply-demand mismatch and improves energy utilization. When there is surplus photovoltaic power at noon, the excess electricity drives the heat pump to produce hot water, which is then stored in the thermal storage device. The remaining electricity is stored in the battery, avoiding waste due to "asynchronous generation and consumption" and improving the photovoltaic absorption rate. Second, it ensures load stability and reduces system dependence. During the peak heat load periods in the morning and evening, the stored heat is directly released to meet the demand, ensuring stable heating and avoiding the risk of heating interruption caused by fluctuations in solar energy resources. Third, it optimizes equipment configuration and controls investment costs. By "storing heat at noon and releasing heat in the morning and evening," the installed capacity of medium-deep underground pipes can be reduced, achieving the triple value of "high energy efficiency, stable load, and controllable cost."

[0072] 3. To address the heating demands of high-ceilinged spaces in railway station buildings, a preheating strategy based on medium-deep underground pipes is proposed. Before the station opens, the underground pipe system operates intermittently, leveraging its heat storage capacity to preheat the building space and envelope. After the station opens, factors such as infiltration winds and surges in passenger traffic can easily cause a sharp increase in heat load. At this time, the thermal inertia of the high-ceilinged space can be utilized to release the heat preheated and stored in the underground pipe envelope, effectively smoothing out peak heat load fluctuations. This strategy reduces the instantaneous heating pressure of the system without requiring additional heat sources. It eliminates the "cold inertia" of the envelope, significantly improves energy efficiency, reduces total building energy consumption, and possesses good technical and economic advantages.

[0073] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system for railway station buildings, characterized in that: The system includes a medium-deep geothermal coupled thermal storage and heating system (101), a user terminal (102), and a photovoltaic energy storage unit (103). The medium-deep geothermal coupled thermal storage and heating system (101) includes a heat pump (1), a heat exchanger (2), a hot water storage tank (3), and a buried pipe (4). The user terminal (102) includes a radiant coil (5). The photovoltaic energy storage unit (103) includes a photovoltaic module (7) and a power grid (11). The buried pipe (4) is connected to the heat pump (1) and the heat exchanger (2), the heat pump (1) is connected to the hot water storage tank (3) and the radiant coil (5), the heat exchanger (2) is connected to the hot water storage tank (3), and the hot water storage tank (3) is connected to the radiant coil (5), forming multiple heating cycles; The photovoltaic storage unit (103) is connected to the medium-deep geothermal coupled thermal storage and heating system (101) and the user terminal (102), and uses the photovoltaic module (7) and the power grid (11) to provide electrical energy.

2. The deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in a railway station building according to claim 1, characterized in that: The underground pipe (4), the heat exchanger (2), the hot water storage tank (3), and the radiant coil (5) constitute the first heating cycle.

3. The deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in a railway station building according to claim 2, characterized in that: The buried pipe (4), the heat pump (1), and the radiant coil (5) form the second heating cycle.

4. The deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in a railway station building according to claim 3, characterized in that: The underground pipe (4), the heat pump (1), and the hot water storage tank (3) form the third heating cycle.

5. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system for railway station buildings according to claim 4, characterized in that: The buried pipe (4), the heat pump (1), the hot water storage tank (3) and the radiant coil (5) form the fourth heating cycle, wherein the heat pump (1) and the hot water storage tank (3) are simultaneously connected to the radiant coil (5).

6. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system for railway station buildings according to claim 5, characterized in that: The hot water storage tank (3) and the radiant coil (5) form the fifth heating cycle.

7. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system for railway station buildings according to claim 6, characterized in that: Electric regulating valves are installed in the pipelines of multiple heating cycles.

8. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in a railway station building according to claim 7, characterized in that: A heat source side water pump (13) is installed on the pipeline at the output end of the buried pipe (4), a user side water pump (20) is installed on the pipeline at the output end of the heat pump (1), a hot water storage pump (26) is installed on the pipeline at the input end of the hot water storage tank (3), and a hot water discharge pump (27) is installed on the pipeline at the output end of the hot water storage tank (3).

9. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in a railway station building according to claim 8, characterized in that: A temperature monitoring instrument (12) is installed on the pipeline at the output end of the underground pipe (4).

10. A deep geothermal coupled photovoltaic energy storage and thermal energy storage heating system in a railway station building according to claim 9, characterized in that: An indoor temperature monitoring instrument (22) is installed in the heating space of the user terminal (102).

Images