Dual-media inter-seasonal thermal storage, inter-seasonal combined heating system, and inter-seasonal combined heating method

Abstract

This invention relates to a tiered, dual-medium, inter-seasonal thermal storage tank, an inter-seasonal combined heating system, and an inter-seasonal combined heating method. The tiered, dual-medium, inter-seasonal thermal storage tank includes a storage pool, inlet pipes, outlet pipes, and aluminum tube collectors. The storage pool contains a first, second, and third thermal storage layer, located at the bottom, middle, and top of the storage pool, respectively. The tops of the first, second, and third thermal storage layers are hardened to form a first hardened layer, a second hardened layer, and a third hardened layer, respectively. Each of these hardened layers has a first opening and a first outlet, a second opening and a second outlet, and a third opening and a third outlet. This invention achieves tiered utilization of thermal energy quality by dividing the storage pool into layers, utilizing thermal energy sequentially from the first to the third thermal storage layer, thus realizing dual-medium thermal storage and inter-seasonal comprehensive utilization.

Description

Technical Field

[0001] This invention relates to the field of building energy conservation technology, and in particular to building heating technology, specifically to a dual-medium cross-seasonal thermal storage facility with cascaded utilization, a cross-seasonal combined heating system, and a cross-seasonal combined heating method. Background Technology

[0002] In recent years, due to the constraints of fossil fuels and the drive for carbon peaking and carbon neutrality, renewable energy has received unprecedented attention. However, the instability, discontinuity, and seasonality of renewable energy are the most prominent unfavorable factors for its large-scale consumption and utilization, and large-scale, low-cost energy storage technology has become one of the key means to solve this problem.

[0003] In cold and frigid regions, houses are equipped with heating systems, and the comfortable ambient temperature for humans is between 18°C ​​and 25°C. Common heating methods include central heating, radiant floor heating, gas heating, air conditioning heating, and air source heat pump heating. Traditional heating methods all have problems such as high consumption of fossil fuels and inability to utilize the abundant heat energy in summer. The use of renewable energy for heating and cross-seasonal heat storage heating are receiving increasing attention from countries and academic institutions, and have become a hot research topic in the construction industry.

[0004] In related technologies, cross-seasonal thermal storage heating suffers from significant drawbacks. The storage tanks are typically over 10 meters deep, with the tops covered by insulation materials. This results in unused top areas and potential safety hazards. Furthermore, the storage tanks are difficult to stratify, leading to water convection that lowers the thermal quality and hinders the efficient use of high-quality stored water. Direct heating from the storage tanks requires temperatures above 35°C; otherwise, the required heating temperature is not met. Given that the stored water temperature range is 35°C to 100°C, excessive heating wastes heat, and the thermal potential of water within the 0-35°C temperature range remains unutilized. Insufficient heating negatively impacts indoor temperatures for users in the heating area. The use of glass vacuum tube collectors fails to absorb air energy, leaving abundant air energy unused during the high summer months. Therefore, improvements are needed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention first provides a dual-medium cross-seasonal thermal storage facility, aiming to achieve dual-medium thermal storage, cascade utilization of thermal energy in the storage facility, and comprehensive utilization of cross-seasonal thermal storage.

[0006] Another technical problem to be solved by the present invention is to provide a cross-seasonal combined heating system and a cross-seasonal combined heating method to achieve cross-seasonal heat storage and heating and improve overall heating energy efficiency.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a dual-medium, cross-seasonal thermal storage facility utilizing cascaded technologies, comprising a thermal storage pool, an inlet pipe, an outlet pipe, and an aluminum tube collector, wherein: the thermal storage pool contains a first thermal storage layer, a second thermal storage layer, and a third thermal storage layer, which are respectively located at the bottom, middle, and top of the thermal storage pool; the tops of the first, second, and third thermal storage layers are hardened to form a first hardened layer, a second hardened layer, and a third hardened layer, respectively; and the first, second, and third hardened layers are respectively provided with a first opening and a first outlet, a second opening and a second outlet, and a third opening and a third outlet; the inlet pipe includes a first inlet pipe, a second inlet pipe, and a third inlet pipe, wherein the first inlet pipe passes through the third opening. The system includes a second opening, a first opening extending to the bottom of the first thermal storage layer, a second inlet pipe passing through the third opening and extending to the bottom of the second thermal storage layer, and a third inlet pipe passing through the third opening and extending to the bottom of the third thermal storage layer. The outlet pipe includes a first outlet pipe, a second outlet pipe, and a third outlet pipe, wherein the first outlet pipe passes through the third outlet, the second outlet, and the first outlet and extends to the top of the first thermal storage layer; the second outlet pipe passes through the third outlet and extends to the top of the second thermal storage layer; and the third outlet pipe passes through the third outlet and extends to the top of the third thermal storage layer. The aluminum tube collector is installed on top of the thermal storage tank and is connected to the inlet and outlet pipes via a heat exchanger, forming a parallel connection with the thermal storage tank.

[0009] In some embodiments, the first heat storage layer, the second heat storage layer, and the third heat storage layer are formed by accumulating waste concrete blocks in the heat storage pool, and water is filled into the gaps between the waste concrete blocks.

[0010] In some embodiments, the first hardening layer, the second hardening layer, and the third hardening layer are formed by hardening the waste concrete blocks on top of each layer using cement mortar or concrete.

[0011] In some embodiments, one end of the first water inlet pipe, the second water inlet pipe, the third water inlet pipe, the first water outlet pipe, the second water outlet pipe, and the third water outlet pipe is bent into a 90° right-angle water pipe.

[0012] A second aspect of the present invention provides a cross-seasonal combined heating system, comprising a thermal storage heating system, a water source heat pump heating system, an aluminum pipe multi-source heat pump heating system, and a water supply pipeline and a return pipeline connecting to the user end of a building, wherein: the thermal storage heating system includes the dual-medium cross-seasonal thermal storage tank, the water supply pipeline is connected to the inlet pipeline of the dual-medium cross-seasonal thermal storage tank, and the outlet pipeline of the dual-medium cross-seasonal thermal storage tank is connected to the return pipeline; the water source heat pump heating system is connected between the water supply pipeline and the return pipeline, and includes a water source heat pump unit, the water source heat pump unit and the thermal storage tank... The reservoirs are connected in parallel; the aluminum pipe multi-source heat pump heating system is connected between the water supply pipeline and the return water pipeline, including an aluminum pipe multi-source heat pump unit and an aluminum pipe collector; the water supply pipeline is connected to the first inlet pipe, the second inlet pipe, and the third inlet pipe of the dual-medium inter-seasonal heat storage reservoir through a first inlet pipe solenoid valve, a second inlet pipe solenoid valve, and a third inlet pipe solenoid valve, respectively; the first outlet pipe, the second outlet pipe, and the third outlet pipe of the dual-medium inter-seasonal heat storage reservoir are connected to the return water pipeline through a first outlet pipe solenoid valve, a second outlet pipe solenoid valve, and a third outlet pipe solenoid valve, respectively.

[0013] In some embodiments, the heating system for the thermal storage facility further includes a thermal storage heating circulation pump and a thermal storage direct heating circulation solenoid valve, wherein the thermal storage heating circulation pump and the thermal storage direct heating circulation solenoid valve are disposed between the outlet water pipeline and the return water pipeline of the dual-medium inter-seasonal thermal storage facility.

[0014] In some embodiments, the water source heat pump heating system further includes a water source heat pump unit heating circulation pump, a water source heat pump unit heating circulation check valve, and a heat storage-water source heat pump unit circulation solenoid valve. The water source heat pump unit heating circulation pump and the water source heat pump unit heating circulation check valve are disposed between the water source heat pump unit and the return water pipeline, and the heat storage-water source heat pump unit circulation solenoid valve is disposed between the heat storage heating circulation pump and the water source heat pump unit.

[0015] In some embodiments, the aluminum pipe multi-source heat pump heating system further includes an aluminum pipe collector heat transfer medium circulation pump, an aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve, an aluminum pipe multi-source heat pump unit heating circulation pump, and an aluminum pipe multi-source heat pump unit heating circulation check valve. The aluminum pipe collector heat transfer medium circulation pump and the aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve are disposed between the aluminum pipe collector and the aluminum pipe multi-source heat pump unit, and the aluminum pipe multi-source heat pump unit heating circulation pump and the aluminum pipe multi-source heat pump unit heating circulation check valve are disposed between the aluminum pipe multi-source heat pump unit and the return water pipeline.

[0016] Preferably, a summer energy storage aluminum pipe collector-heat exchanger circulation solenoid valve is provided between the heat transfer medium circulation pump of the aluminum pipe collector and the heat exchanger. The heat exchanger is connected to the outlet and inlet water pipes of the dual-medium inter-seasonal thermal storage tank, and a summer energy storage aluminum pipe collector-thermal storage tank circulation pump is provided between the heat exchanger and the outlet water pipe of the dual-medium inter-seasonal thermal storage tank.

[0017] A third aspect of the present invention proposes a cross-seasonal combined heating method, comprising supplemental heating during the non-heating season and heating during the heating season, wherein: during the non-heating season, the aluminum pipe collector supplements heat to the dual-medium cross-seasonal heat storage facility; during the heating season, the cross-seasonal combined heating system provides heating to the building user end, including direct heating from the heat storage heating system, heating from the water source heat pump heating system, and heating from the aluminum pipe multi-source heat pump heating system, the three of which operate individually or in combination.

[0018] In some embodiments, the aluminum tube collector's supplemental heating to the dual-medium inter-seasonal thermal storage includes an aluminum tube collector-heat exchanger heat transfer medium circulation and a heat exchanger-thermal storage hot water circulation, wherein:

[0019] The heat transfer medium circulation of the aluminum tube collector-heat exchanger includes: starting the heat transfer medium circulation pump of the aluminum tube collector, opening the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve, and the heat transfer medium of the aluminum tube collector returning to the heat transfer medium circulation pump of the aluminum tube collector via the heat transfer medium circulation pump of the aluminum tube collector through the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve → heat exchanger → aluminum tube collector.

[0020] The heat exchanger-heat storage hot water circulation includes: starting the summer energy storage aluminum pipe collector-heat storage circulation pump, opening the third outlet pipe solenoid valve and the first inlet pipe solenoid valve, and the heat storage hot water is transported from the aluminum pipe collector-heat storage circulation pump through the third outlet pipe solenoid valve → third outlet pipe → heat storage → first inlet pipe → first inlet pipe solenoid valve → heat exchanger → summer energy storage aluminum pipe collector-heat storage circulation pump.

[0021] In some embodiments, the direct heating system of the hot storage facility includes:

[0022] If the temperature of the hot storage water is higher than the temperature threshold, the hot storage heating system will provide direct heating, the hot storage heating circulation pump will start, the hot storage direct heating circulation solenoid valve will open, the hot storage-water source heat pump unit circulation solenoid valve will close, and the hot storage water will circulate between the dual-medium inter-seasonal hot storage and the building user end through the water supply pipeline and the return water pipeline.

[0023] Preferably, the first heat storage layer directly supplies heat, the first outlet pipe solenoid valve and the first inlet pipe solenoid valve are opened, and the second outlet pipe solenoid valve, the second inlet pipe solenoid valve, the third outlet pipe solenoid valve and the third inlet pipe solenoid valve are closed at the same time, and the heat storage water circulates between the dual-medium inter-seasonal heat storage and the building user end through the first heat storage layer;

[0024] When the temperature of the hot water in the first thermal storage layer is lower than the temperature threshold and the temperature of the hot water in the second thermal storage layer is higher than the temperature threshold, the second thermal storage layer directly provides heating. The second outlet pipe solenoid valve and the second inlet pipe solenoid valve open, while the first outlet pipe solenoid valve, the first inlet pipe solenoid valve, the third outlet pipe solenoid valve, and the third inlet pipe solenoid valve close. The hot water circulates through the second thermal storage layer between the dual-medium inter-seasonal thermal storage and the building user end.

[0025] When the water temperature in the first and second thermal storage layers is below the temperature threshold, and the water temperature in the third thermal storage layer is above the temperature threshold, the third thermal storage layer directly provides heating. The third outlet pipe solenoid valve and the third inlet pipe solenoid valve open, while the first outlet pipe solenoid valve, the first inlet pipe solenoid valve, the second outlet pipe solenoid valve, and the second inlet pipe solenoid valve close. The thermal storage water circulates through the third thermal storage layer between the dual-medium inter-seasonal thermal storage and the building user end.

[0026] In some embodiments, the heating provided by the water source heat pump heating system includes:

[0027] When the temperature of the hot water in the thermal storage facility is below the temperature threshold, heating is provided by a water source heat pump heating system, which includes a thermal storage-water source heat pump unit cycle and a water source heat pump unit heating cycle, wherein:

[0028] The circulation of the hot storage-water source heat pump unit is as follows: the hot storage heating circulation pump starts, the hot storage-water source heat pump unit circulation solenoid valve opens, the hot storage direct heating circulation solenoid valve closes, the first inlet pipe solenoid valve and the third outlet pipe solenoid valve open, and the hot storage water circulates between the dual-medium inter-seasonal hot storage and the water source heat pump unit. The low-temperature heat energy from the hot storage pool is transferred to the water source heat pump unit.

[0029] The heating cycle of the water source heat pump unit involves starting the heating cycle pump of the water source heat pump unit, opening the heating cycle check valve of the water source heat pump unit, and circulating the hot water in the heat storage through the water supply pipeline and the return pipeline between the water source heat pump unit and the building user end, so that the heat energy of the water source heat pump unit can be delivered to the building user end.

[0030] In some embodiments, the heating system of the aluminum pipe multi-source heat pump includes a heat transfer medium circulation of the aluminum pipe collector-aluminum pipe multi-source heat pump unit and a heating circulation of the aluminum pipe multi-source heat pump unit, wherein:

[0031] The heat transfer medium circulation of the aluminum tube collector-aluminum tube multi-source heat pump unit includes: starting the heat transfer medium circulation pump of the aluminum tube collector, opening the circulation solenoid valve of the aluminum tube collector-aluminum tube multi-source heat pump unit, closing the circulation solenoid valve of the energy storage aluminum tube collector-heat exchanger in summer, circulating the heat transfer medium of the aluminum tube collector between the aluminum tube collector and the aluminum tube multi-source heat pump unit, and transferring the heat energy from the aluminum tube collector to the aluminum tube multi-source heat pump unit.

[0032] The heating cycle of the aluminum pipe multi-source heat pump unit includes: starting the heating cycle pump of the aluminum pipe multi-source heat pump unit, opening the heating cycle check valve of the aluminum pipe multi-source heat pump unit, circulating the hot water between the aluminum pipe multi-source heat pump unit and the building user end, and delivering the heat energy of the aluminum pipe multi-source heat pump unit to the building user end.

[0033] The dual-medium cross-seasonal thermal storage tank according to the embodiments of the present invention has at least the following effects: (1) By dividing the thermal storage tank into layers, the thermal storage tank is divided into multiple layers according to the height difference using cement mortar or concrete. The thermal energy of the lowest layer of the thermal storage tank is used for heating first, and the thermal energy of the highest layer of the thermal storage tank is used for heating last. The thermal energy of the thermal storage tank is used sequentially from the bottom layer to the top layer to prevent the high-grade thermal energy of the thermal storage tank from being degraded due to the convection of the water medium in the thermal storage tank. This achieves the graded utilization of the thermal energy of the thermal storage tank; (2) Waste concrete blocks are piled up in the thermal storage tank. The volumetric heat capacity of concrete is relatively large, and water can flow freely in the gaps between the waste concrete blocks. Due to the long time span, the waste concrete blocks and the water flowing in the gaps between them can fully exchange heat, thus realizing dual-medium thermal storage and cross-seasonal comprehensive utilization of concrete blocks and water.

[0034] According to the cross-seasonal combined heating system and method of the present invention, during the summer non-heating season, the solar energy and air energy absorbed by the aluminum pipe collector are stored in the heat storage to achieve cross-seasonal heat storage and heating; during the winter heating season, through temperature setting and heating control, the system can operate in combination or individually, with direct heating from the heat storage, heating from the water source heat pump, and heating from the aluminum pipe multi-source heat pump; this expands the heat storage potential of water in the temperature range of 0-40℃; regardless of whether the three are used for combined heating or individual heating, the system optimizes operation by leveraging the advantages of each, reducing the capacity of the aluminum pipe multi-source heat pump and the water source heat pump, as well as the heat storage volume, thereby improving overall heating energy efficiency, making it green, environmentally friendly, and resource-saving. Attached Figure Description

[0035] To more clearly illustrate the embodiments of the present invention or the technical solutions in 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 merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0036] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0037] Figure 1 This is a top view of the thermal storage tank provided in an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the thermal storage facility along line AA.

[0039] Figure 3 This is a top view schematic diagram of the opening of the hardened layer of the hot water storage, the water inlet pipe and the water outlet pipe provided in the embodiment of the present invention;

[0040] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the thermal storage along line BB.

[0041] Figure 5 This is a schematic diagram of a building heating system provided in an embodiment of the present invention;

[0042] Figure 6 yes Figure 5 A schematic diagram of a building heating system for a thermal storage facility.

[0043] Figure 7 yes Figure 5 The diagram shows a water source heat pump heating system for a building.

[0044] Figure 8 yes Figure 5 The diagram shows a multi-source heat pump heating system with aluminum pipes for a building heating system.

[0045] Figure 9 yes Figure 5 The diagram shows a summer energy storage system for a building's heating system.

[0046] The markings in the diagram mean:

[0047] 100. Dual-media inter-seasonal thermal storage facility;

[0048] 10. Thermal storage pool; 11. Top hardened and insulation layer; 12. Platform; 13. Stacking platform; 14. First thermal storage layer; 15. Second thermal storage layer; 16. Third thermal storage layer; 17. First hardened layer; 18. Second hardened layer; 19. Third hardened layer;

[0049] 20. Water inlet pipe; 21. First water inlet pipe; 22. Second water inlet pipe; 23. Third water inlet pipe;

[0050] 30. Water outlet pipe; 31. First water outlet pipe; 32. Second water outlet pipe; 33. Third water outlet pipe;

[0051] 200. Heating system for hot storage facilities; 201. First inlet solenoid valve; 202. Second inlet solenoid valve; 203. Third inlet solenoid valve; 204. First outlet solenoid valve; 205. Second outlet solenoid valve; 206. Third outlet solenoid valve; 207. Heating circulation pump for hot storage facilities; 208. Direct heating circulation solenoid valve for hot storage facilities;

[0052] 300. Water source heat pump heating system; 301. Water source heat pump unit; 302. Water source heat pump unit heating circulation pump; 303. Water source heat pump unit heating circulation check valve; 304. Heat storage-water source heat pump unit circulation solenoid valve;

[0053] 400. Aluminum pipe multi-source heat pump heating system; 401. Aluminum pipe multi-source heat pump unit; 402. Aluminum pipe collector; 403. Heat exchanger; 404. Aluminum pipe collector heat transfer medium circulation pump; 405. Aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve; 406. Aluminum pipe multi-source heat pump unit heating circulation pump; 407. Aluminum pipe multi-source heat pump unit heating circulation check valve; 408. Summer energy storage aluminum pipe collector-heat exchanger circulation solenoid valve; 409. Summer energy storage aluminum pipe collector-heat storage circulation pump;

[0054] 500. Building user end; 501. Water supply pipeline; 502. Return water pipeline.

[0055] 1000. Cross-seasonal combined heating system. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0059] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] The implementation of the present invention will be described in detail below with reference to preferred embodiments.

[0062] See Figures 1 to 4 and combined Figure 5 The present invention first provides a dual-medium inter-seasonal thermal storage 100, including a thermal storage pool 10, an inlet water pipe 20, an outlet water pipe 30, and an aluminum tube collector 402.

[0063] like Figure 1 Soil excavated from below ground level into the heat storage pool 10 is piled around the pool to form a platform 13. A platform 12 with a height of more than 3 meters is formed on top of the platform 13. This process not only handles the excavated soil from the heat storage pool 10 but also expands the heat storage volume. The outer perimeter of the platform 13 forms a slope, which is beneficial for stability. The top of the heat storage pool is hardened and insulated to form a hardened and insulated top layer 11, which is beneficial for heat preservation of the heat storage pool 10.

[0064] In this invention, waste concrete blocks are piled up in the heat storage pool 10. These waste concrete blocks are readily available and vary widely in size, ranging from 1 cm to 1 meter, and even up to 2 meters. Due to their isotropic nature, a 2-meter-sized waste concrete block will only have a 1-meter dimension for both heat storage and heat release. The heat storage system stores heat throughout the summer, allowing the concrete blocks to fully absorb heat; and because the heat release occurs throughout the winter, the heat energy within the concrete blocks is also fully released.

[0065] The waste concrete blocks piled up in the heat storage pool 10 directly harden on top to form a hardened layer. The piled waste concrete blocks support this hardened layer. Water is filled into the gaps between the waste concrete blocks, creating a dual-medium heat storage system with the waste concrete blocks and water. The volumetric specific heat capacity of the concrete reaches 1840 KJ / (m³). 3 ·℃) is one of the highest volumetric heat capacities among common solids. Water can flow freely in the gaps between waste concrete blocks. Due to the long time span, the waste concrete blocks and the water flowing in the gaps can fully exchange heat; a dual-medium heat storage tank of waste concrete and water is called a heat reservoir or heat storage pool.

[0066] See Figures 2 to 4 , Figure 2 yes Figure 1 A cross-sectional view of the heat storage pool along line AA shows that the heat storage pool 10 is provided with a first heat storage layer 14, a second heat storage layer 15, and a third heat storage layer 16. The first heat storage layer 14, the second heat storage layer 15, and the third heat storage layer 16 are respectively located at the bottom, middle, and top of the heat storage pool 10. Since the density of water is inversely proportional to temperature in the range of 4℃ to 100℃, the natural temperature gradient of the thermal storage pool 10 is that the temperature is higher at the top and lower at the bottom. In order to prevent the temperature at the top of the thermal storage pool 10 from decreasing due to water convection between the upper and lower parts of the thermal storage pool 10, thereby reducing the heat energy grade of the thermal storage pool 10, the thermal storage pool 10 is divided into layers using cement mortar or concrete. In practical applications, it can be divided into multiple layers. Without losing generality, this embodiment of the invention divides the thermal storage pool into three layers: the first thermal storage layer 14 is the upper layer of the thermal storage pool, the second thermal storage layer 15 is the middle layer of the thermal storage pool, and the third thermal storage layer 16 is the lower layer of the thermal storage pool. By dividing the pool into layers, the water convection between the upper and lower parts of the pool is reduced, thus reducing the heat storage grade and realizing the cascade utilization of the stored hot water, giving full play to the energy efficiency of the high-grade stored hot water.

[0067] In this invention, a first hardened layer 17, a second hardened layer 18, and a third hardened layer 19 are formed on the top of the first thermal storage layer 14, the second thermal storage layer 15, and the third thermal storage layer 16, respectively. The first hardened layer 17 has a first opening and a first outlet; the second hardened layer 18 has a second opening and a second outlet; and the third hardened layer 19 has a third opening and a third outlet (not shown in the figure). Openings are made in the top hardened partition layers of the upper, middle, and lower thermal storage layers to allow communication between the upper and lower water layers, thus eliminating the stress caused by thermal expansion and contraction of the water in the hardened partition layers. The size of the openings is negligible relative to the entire hardened layer, and their impact on the insulation effect of the hardened layer on the upper and lower thermal storage layers is negligible; the size of the openings only needs to allow for necessary orderly flow of water between the upper and lower thermal storage layers.

[0068] like Figure 3 , Figure 4 The water inlet pipe 20 includes a first water inlet pipe 21, a second water inlet pipe 22, and a third water inlet pipe 23. The first water inlet pipe 21 extends from top to bottom through the third opening, the second opening, and the first opening to the bottom of the first heat storage layer 14. The second water inlet pipe 22 extends from top to bottom through the third opening and the second opening to the bottom of the second heat storage layer 15. The third water inlet pipe 23 extends from the third opening to the bottom of the third heat storage layer 16. Correspondingly, the water outlet pipe 30 includes a first water outlet pipe 31, a second water outlet pipe 32, and a third water outlet pipe 33. The first water outlet pipe 31 extends from top to bottom through the third outlet, the second outlet, and the first outlet to the top of the first heat storage layer 14. The second water outlet pipe 32 extends from top to bottom through the third outlet and the second outlet to the top of the second heat storage layer 15. The third water outlet pipe 33 extends from the third outlet to the top of the third heat storage layer 16.

[0069] It is easy to understand that the temperature gradient of each heat storage layer is that the temperature is high at the top and low at the bottom. The inlet of the first water inlet pipe 21 is installed at the bottom of the first heat storage layer 14, which is conducive to the entry of low-grade water into the bottom of the first heat storage layer 14. The outlet of the first water outlet pipe 31 is installed at the top of the first heat storage layer 14, which is conducive to the flow of high-grade water from the top of the first heat storage layer 14 for heating.

[0070] When the water temperature in the first heat storage layer 14 is lower than the set temperature and the water temperature in the second heat storage layer 15 is higher than the set temperature, the hot water from the second heat storage layer 15 is used directly for heating. Similarly, the temperature gradient of the second heat storage layer 15 is that the temperature is higher at the top and lower at the bottom. The inlet of the second inlet pipe 22 is installed at the bottom of the second heat storage layer 15, which facilitates the entry of low-grade water into the bottom of the second heat storage layer 15; the outlet of the second outlet pipe 32 is installed at the top of the second heat storage layer 15, which facilitates the outflow of high-grade water from the top of the second heat storage layer 15 for heating.

[0071] When the water temperatures in the first and second heat storage layers 14 and 15 are both below the set temperature, while the water temperature in the third heat storage layer 16 is above the set temperature, the hot water from the third heat storage layer 16 is used directly for heating. Similarly, the temperature gradient in the third heat storage layer 16 is that the temperature is higher at the top and lower at the bottom. The inlet of the third inlet pipe 23 is installed at the bottom of the third heat storage layer 16, which facilitates the entry of low-grade water into the bottom of the third heat storage layer 16; the outlet of the third outlet pipe 33 is installed at the top of the third heat storage layer 16, which facilitates the outflow of high-grade water from the top of the third heat storage layer 16 for heating.

[0072] Preferably, the inlet ends of the first inlet pipe 21, the second inlet pipe 22, and the third inlet pipe 23, as well as the outlet ends of the first outlet pipe 31, the second outlet pipe 32, and the third outlet pipe 33, are bent into 90° right-angle pipes. For example, elbows are installed at the inlets of the first inlet pipe 21, the second inlet pipe 22, and the third inlet pipe 23 to change the direction of water flow and make the water flow horizontally. Elbows are also installed at the outlets of the first outlet pipe 31, the second outlet pipe 32, and the third outlet pipe 33 to change the direction of water flow and make the water flow horizontally, thereby reducing vertical convection of water in the thermal storage layer.

[0073] The dual-medium inter-seasonal thermal storage tank 100 of the present invention also has an aluminum pipe collector, which is installed on the top of the thermal storage tank. The aluminum pipe collector is installed on the top of the huge thermal storage tank. In summer, when the temperature is high, it not only utilizes solar energy but also air energy, realizing the inter-seasonal storage and utilization of abundant air energy and improving the overall heating energy efficiency.

[0074] Combination Figure 5 The aluminum tube collector 402 is connected to the inlet pipe 20 and outlet pipe 30 via a heat exchanger 403, forming a parallel connection with the heat storage pool 10. During the non-heating season in summer, the heat storage pool 10 must be supplemented with heat to maintain thermal balance throughout the year. This invention utilizes the aluminum tube collector 502 to achieve this. The aluminum tube collector 402 is installed on the hardened and insulated layer 11 at the top of the heat storage pool 10. The tilt angle and orientation of the aluminum tube collector 402 are referenced to the photovoltaic modules to maximize solar energy absorption and transfer the absorbed solar and air energy to the heat storage pool 10. The aluminum tube collector 402 can absorb both solar and air energy, overcoming the limitation of glass vacuum tube water heaters that cannot absorb air energy, and reducing the area of ​​the aluminum tube collector 402.

[0075] See also Figures 5 to 9 The present invention further provides a cross-seasonal combined heating system 1000 based on the aforementioned dual-medium cross-seasonal heat storage 100, including a heat storage heating system 200, a water source heat pump heating system 300, an aluminum pipe multi-source heat pump heating system 400, and a water supply pipeline 501 and a return water pipeline 502 connecting the building user end 500.

[0076] The thermal storage heating system 200 includes the aforementioned thermal storage tank 10. A water supply pipeline 501 is connected to the inlet pipeline 20 of the dual-medium inter-seasonal thermal storage tank 100, and an outlet pipeline 30 of the dual-medium inter-seasonal thermal storage tank 100 is connected to the return pipeline 502. This enables the hot water from the thermal storage tank 10 to be circulated and supplied to the building user end 500.

[0077] The water source heat pump heating system 300 is connected between the supply water pipeline 501 and the return water pipeline 502, and includes a water source heat pump unit 301, which is connected in parallel with the heat storage tank 10. This allows the water source heat pump unit 301 to independently circulate heat to the building user end 500, and the heat from the water source heat pump unit 301 is provided by the heat storage tank 10 under certain conditions, thus expanding the energy storage temperature utilization range of the heat storage tank 10.

[0078] The aluminum pipe multi-source heat pump heating system 400 is connected between the water supply pipe 501 and the return water pipe 502, and includes the aluminum pipe multi-source heat pump unit 401 and the aluminum pipe collector 402. This allows the aluminum pipe multi-source heat pump unit 401 to independently circulate heat to the building user end 500. The heat of the aluminum pipe multi-source heat pump unit 401 comes from the solar energy and air energy absorbed and stored by the aluminum pipe collector 402. In addition, as mentioned above, the aluminum pipe collector 402 can also supplement the heat storage pool 10 during the non-heating season in summer, enabling the heat storage pool 10 to achieve thermal balance throughout the year and realize cross-seasonal comprehensive utilization.

[0079] In this invention, for the heating system 200, a first inlet pipe solenoid valve 201, a second inlet pipe solenoid valve 202, and a third inlet pipe solenoid valve 203 are respectively installed on the first inlet pipe 21, the second inlet pipe 22, and the third inlet pipe 23 of the corresponding inlet pipes 20, such as... Figure 5 As shown, the water supply pipeline 501 is connected to the first inlet pipe 21, the second inlet pipe 22, and the third inlet pipe 23 of the dual-medium inter-seasonal thermal storage tank 100 via the first inlet pipe solenoid valve 201, the second inlet pipe solenoid valve 202, and the third inlet pipe solenoid valve 203, respectively. Similarly, the first outlet pipe solenoid valve 204, the second outlet pipe solenoid valve 205, and the third outlet pipe solenoid valve 206 are installed on the corresponding outlet pipes 30. The first outlet pipes 31, the second outlet pipes 32, and the third outlet pipes 33 of the dual-medium inter-seasonal thermal storage tank 100 are connected to the return water pipeline 502 via the first outlet pipe solenoid valve 204, the second outlet pipe solenoid valve 205, and the third outlet pipe solenoid valve 206, respectively. This allows for the selective use of hot water from the first thermal storage layer 14, the second thermal storage layer 15, or the third thermal storage layer 16 in the thermal storage tank 10, according to actual conditions and setting requirements.

[0080] In this invention, see also Figure 5 and combined Figure 6 The heating system 200 also includes a heating circulation pump 207 and a direct heating circulation solenoid valve 208, which are installed between the outlet pipe 30 and the return pipe 502 of the dual-medium inter-seasonal heating storage 100. When the heating system 200 is used for heating alone, the heating circulation pump 207 starts and the direct heating circulation solenoid valve 208 opens, which will be explained in detail later.

[0081] In this invention, see also Figure 5 and combined Figure 7 The water source heat pump heating system 300 also includes a water source heat pump unit heating circulation pump 302, a water source heat pump unit heating circulation check valve 303, and a hot storage-water source heat pump unit circulation solenoid valve 304. The water source heat pump unit heating circulation pump 302 and the water source heat pump unit heating circulation check valve 303 are located between the water source heat pump unit 301 and the return water pipeline 502, and the hot storage-water source heat pump unit circulation solenoid valve 304 is located between the hot storage heating circulation pump 207 and the water source heat pump unit 301. When the water source heat pump heating system 300 is used for heating alone, the heating circulation pump 207 of the hot storage starts, the direct heating circulation solenoid valve 208 of the hot storage closes, the circulation solenoid valve 304 of the hot storage-water source heat pump unit opens, the heating circulation pump 302 of the water source heat pump unit starts, the heating circulation check valve 303 of the water source heat pump unit opens, the water source heat pump unit 301 receives the waste heat from the hot storage pool 10 and raises its temperature, and the hot storage water circulates and transfers heat between the water source heat pump unit 301 and the building user end 500 through the water supply pipeline 501 and the return water pipeline 502.

[0082] In this invention, see also Figure 5 and combined Figure 8 The aluminum pipe multi-source heat pump heating system 400 also includes an aluminum pipe collector heat transfer medium circulation pump 404, an aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve 405, an aluminum pipe multi-source heat pump unit heating circulation pump 406, and an aluminum pipe multi-source heat pump unit heating circulation check valve 407. The aluminum pipe collector heat transfer medium circulation pump 404 and the aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve 405 are located between the aluminum pipe collector 402 and the aluminum pipe multi-source heat pump unit 401. The aluminum pipe multi-source heat pump unit heating circulation pump 406 and the aluminum pipe multi-source heat pump unit heating circulation check valve 407 are located between the aluminum pipe multi-source heat pump unit 401 and the return water pipe 502. When the aluminum pipe multi-source heat pump heating system 400 is used for heating alone, the aluminum pipe multi-source heat pump unit 401 receives heat from the aluminum pipe collector 402, and the heat storage water circulates between the aluminum pipe multi-source heat pump unit 401 and the building user end 500 through the water supply pipeline 501 and the return water pipeline 502.

[0083] See also Figure 9 A summer energy storage aluminum pipe collector-heat exchanger circulation solenoid valve 408 is installed between the aluminum pipe collector heat transfer medium circulation pump 404 and the heat exchanger 403. The heat exchanger 403 is connected to the outlet pipe 30 and inlet pipe 20 of the dual-medium inter-seasonal heat storage tank 100, and a summer energy storage aluminum pipe collector-heat storage tank circulation pump 409 is installed between the heat exchanger 403 and the outlet pipe 30 of the dual-medium inter-seasonal heat storage tank 100. During the summer non-heating season, the aluminum pipe collector 402 supplements heat to the heat storage pool 10 of the dual-medium inter-seasonal heat storage tank 100 through the heat exchanger 403, which will be described in detail later.

[0084] Based on the above cross-seasonal combined heating system, the present invention provides a cross-seasonal combined heating method. During the summer non-heating season, the solar energy and air energy absorbed by the aluminum pipe collector are stored in the heat storage pool to achieve cross-seasonal heat storage and heating. During the winter heating season, the heat storage pool directly provides heating, water source heat pump provides heating, and aluminum pipe multi-source heat pump provides heating in combination, or each can be operated individually for heating.

[0085] During the summer non-heating season, the aluminum pipe collector 402 supplements heat to the dual-medium inter-seasonal thermal storage tank 100 so that the thermal storage tank 10 can reach thermal balance throughout the year, so as to realize inter-seasonal thermal storage and heating.

[0086] Since the heat transfer medium of the hot storage pool 10 is water, while the heat transfer medium of the aluminum pipe collector 402 is antifreeze, these two heat transfer media are isolated by the heat exchanger 403. Therefore, the heat replenishment from the aluminum pipe collector 402 to the dual-medium inter-seasonal hot storage pool 100 includes two cycles: the heat transfer medium cycle of the aluminum pipe collector and the heat exchanger cycle of the hot water stored in the hot storage pool.

[0087] See Figure 5 , Figure 9 The heat transfer medium circulation of the aluminum tube collector-heat exchanger includes: starting the aluminum tube collector heat transfer medium circulation pump 404, closing the aluminum tube collector-aluminum tube multi-source heat pump unit circulation solenoid valve 405, opening the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve 408, and the aluminum tube collector heat transfer medium circulating from the aluminum tube collector heat transfer medium circulation pump 404 through the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve 408 → heat exchanger 403 → aluminum tube collector 402 back to the aluminum tube collector heat transfer medium circulation pump 404, completing the circulation of the antifreeze in the aluminum tube collector 402, thereby transferring the heat collected by the aluminum tube collector 402 to the heat exchanger 403.

[0088] The heat exchanger-hot water storage circulation process includes: starting the summer energy storage aluminum pipe collector-hot water storage circulation pump 409, opening the third outlet pipe solenoid valve 206 and the first inlet pipe solenoid valve 201, and the hot water in the hot water storage is transferred from the aluminum pipe collector-hot water storage circulation pump 409 through the third outlet pipe solenoid valve 206 → third outlet pipe 33 → hot water storage pool 10 → first inlet pipe 21 → first inlet pipe solenoid valve 201 → heat exchanger 403 → summer energy storage aluminum pipe collector-hot water storage circulation pump 409. In this way, the heat transferred from the aluminum pipe collector 402 to the heat exchanger 403 is exchanged with the hot water in the hot water storage pool 10.

[0089] As can be seen from the above description, during the release of heat in winter, the water in the thermal reservoir circulates in a positive direction. The water in the upper layer first enters the recycling process, and the water that has been used then returns to the lower layer of the thermal reservoir through the recycling process. During summer heat storage, the collector water temperature is higher than the reservoir water temperature. Water is transported from the collector to the upper layer of the reservoir, and the water in the reservoir flows downwards. The lower layer water returns to the collector for heating. Therefore, the circulating water flow direction of the reservoir pool 10 during the summer non-heating period is opposite to that during the winter heating period. Through the circulation of antifreeze in the aluminum tube collector 402, the reverse-flowing stored hot water is circulated from the third outlet pipe 33 through the third heat storage layer 16, the second heat storage layer 15, the first heat storage layer 14, and then through the first inlet pipe 21. This ensures that each heat storage layer receives the circulation of stored hot water, thus storing heat and transferring the absorbed solar and air energy to the reservoir pool 10. The aluminum tube collector 402 can absorb both solar and air energy, overcoming the disadvantage that glass vacuum tube water heaters cannot absorb air energy and reducing the area of ​​the aluminum tube collector 402.

[0090] During the winter heating season, the cross-seasonal combined heating system 1000 supplies heating to 500 building users, including a 200-unit hot storage heating system for direct heating, a 300-unit water source heat pump heating system for heating, and a 400-unit aluminum pipe multi-source heat pump heating system for heating. The three systems can operate in combination or individually.

[0091] See Figure 5 , Figure 6 The direct heating system 200 for the hot storage includes: if the temperature of the hot storage water is higher than the set temperature, such as 40℃, the hot storage heating system directly heats the water, the hot storage heating circulation pump 207 starts, the hot storage direct heating circulation solenoid valve 208 opens, the hot storage-water source heat pump unit circulation solenoid valve 304 closes, and the hot storage water circulates between the dual-medium inter-seasonal hot storage 100 and the building user end 500 through the water supply pipeline 20 and the return water pipeline 30.

[0092] Based on the temperature gradient of the hot water in the reservoir, which is higher at the top and lower at the bottom, the heating system first utilizes the heat energy from the lower layer of the reservoir, then the heat energy from the middle layer, and finally the heat energy from the upper layer.

[0093] When the water temperature in the lower layer of the thermal storage, i.e. the first thermal storage layer 14, is higher than 40℃, the first thermal storage layer 14 firstly provides direct heating. The first outlet pipe solenoid valve 204 and the first inlet pipe solenoid valve 201 are opened, while the second outlet pipe solenoid valve 205, the second inlet pipe solenoid valve 202, the third outlet pipe solenoid valve 206, and the third inlet pipe solenoid valve 23 are closed. The thermal storage water circulates between the dual-medium inter-seasonal thermal storage 100 and the building user end 500 through the first thermal storage layer 14.

[0094] When the water temperature in the first thermal storage layer 14 is below 40℃ and the water temperature in the second thermal storage layer 15 is above 40℃, the second thermal storage layer 15 directly provides heating. The second outlet pipe solenoid valve 205 and the second inlet pipe solenoid valve 202 are opened, while the first outlet pipe solenoid valve 204, the first inlet pipe solenoid valve 201, the third outlet pipe solenoid valve 206, and the third inlet pipe solenoid valve 23 are closed. The thermal storage water circulates between the dual-medium inter-seasonal thermal storage 100 and the building user end 500 through the second thermal storage layer 15.

[0095] Similarly, when the water temperature in the first thermal storage layer 14 and the second thermal storage layer 15 is below 40℃, and the water temperature in the third thermal storage layer 16 is above 40℃, the third thermal storage layer 16 directly provides heating. The third outlet pipe solenoid valve 206 and the third inlet pipe solenoid valve 23 are opened, while the first outlet pipe solenoid valve 204, the first inlet pipe solenoid valve 201, the second outlet pipe solenoid valve 205, and the second inlet pipe solenoid valve 202 are closed. The thermal storage water circulates between the dual-medium inter-seasonal thermal storage 100 and the building user end 500 through the third thermal storage layer 16.

[0096] According to the above operation and control, the thermal storage is layered and the thermal energy of the thermal storage is utilized in stages according to grade. The temperature sensors and controllers are conventional and will not be described in detail in this invention.

[0097] See also Figure 4 Because the temperature gradient is higher at the top and lower at the bottom, the inlet of the first inlet pipe 21 is installed at the bottom of the lower layer of the thermal storage, i.e., the first thermal storage layer 14, which facilitates the entry of low-grade water into the bottom of the lower layer. The outlet of the first outlet pipe 31 is installed at the top of the lower layer of the thermal storage, which facilitates the outflow of high-grade water from the top of the lower layer for heating. The same principle applies to the middle layer of the thermal storage, i.e., the second thermal storage layer 15, and the upper layer of the thermal storage, i.e., the third thermal storage layer 16.

[0098] In this invention, the inlet ends of the first inlet pipe 21, the second inlet pipe 22, and the third inlet pipe 23, as well as the outlet ends of the first outlet pipe 31, the second outlet pipe 32, and the third outlet pipe 33, are bent into 90° right-angle water pipes. For example, elbows are installed at the inlets of the first inlet pipe 21, the second inlet pipe 22, and the third inlet pipe 23 to change the direction of water flow and make the water flow horizontally. Elbows are also installed at the outlets of the first outlet pipe 31, the second outlet pipe 32, and the third outlet pipe 33 to change the direction of water flow and make the water flow horizontally, thereby reducing the vertical convection of water in the thermal storage layer.

[0099] When the temperature of the hot water in the reservoir is below 40℃, a water source heat pump heating system is used for heating. The heat energy of the water source heat pump comes from the heat storage of the hot water pool 10 in the range of 0℃ to 40℃. At 0℃, the hot water in the reservoir does not undergo a phase change and remains in a liquid state.

[0100] See Figure 5 , Figure 7 The 300 heating system of the water source heat pump includes two circulation paths: the heat storage-water source heat pump unit circulation and the water source heat pump unit heating circulation.

[0101] The hot water stored in the heat storage tank 10 has a temperature gradient from top to bottom, with higher temperatures at the top and lower temperatures at the bottom. Priority is given to utilizing the hotter stored water. During the circulation of the heat storage-water source heat pump unit, the first inlet solenoid valve 201 and the third outlet solenoid valve 206 are open, while the first outlet solenoid valve 204, the second inlet solenoid valve 202, the second outlet solenoid valve 205, and the third inlet solenoid valve 203 are closed. The heat storage heating circulation pump 207 starts, and the heat storage-water source heat pump unit circulation solenoid valve 304 opens, and the heat... When the direct heating circulation solenoid valve 208 of the heat storage tank is closed, the heat storage-water source heat pump unit circulation becomes: heat storage heating circulation pump 207 → heat storage-water source heat pump unit circulation solenoid valve 304 → water source heat pump unit 301 → first inlet pipe solenoid valve 201 → first inlet pipe 21 → heat storage tank 10 → third outlet pipe 33 → third outlet pipe solenoid valve 206 → heat storage heating circulation pump 207, forming a complete heat storage-water source heat pump unit circulation, which delivers the low-temperature heat energy from the heat storage tank 10 to the water source heat pump unit 301.

[0102] In the heating cycle of the water source heat pump unit, the heating circulation pump 302 of the water source heat pump unit starts, and the heating circulation check valve 303 of the water source heat pump unit opens. The heating cycle of the water source heat pump unit is as follows: heating circulation pump 302 → heating circulation check valve 303 → return water pipeline 502 → building user end 500 → supply water pipeline 501 → water source heat pump unit 301 → heating circulation pump 302 of the water source heat pump unit, forming a complete heat storage water cycle, delivering the heat energy generated by the water source heat pump unit to the building. The water source heat pump unit utilizes the heat storage temperature range of 0℃ to 40℃ in the heat storage pool 10, expanding the energy storage temperature range of the heat storage pool 10. The heating and heat dissipation facilities at the building user end are conventional and commonly used, and will not be shown or described in detail in this invention.

[0103] During the heating season, aluminum pipe multi-source heat pumps can be used for heating. The heat energy of the aluminum pipe multi-source heat pump unit 401 comes from the aluminum pipe collector 402. The operating temperature of the aluminum pipe collector 402 is lower than the air temperature, and air energy can be transferred to the aluminum pipe collector 402. The aluminum pipe collector 402 can absorb both solar energy and air energy, therefore the aluminum pipe heat pump is a multi-source heat pump.

[0104] See Figure 5 , Figure 8 The aluminum pipe multi-source heat pump heating system 400 heating system includes two cycles: the heat transfer medium circulation of the aluminum pipe collector-aluminum pipe multi-source heat pump unit and the heating circulation of the aluminum pipe multi-source heat pump unit.

[0105] The heat transfer medium circulation of the aluminum tube collector-aluminum tube multi-source heat pump unit includes: starting the aluminum tube collector heat transfer medium circulation pump 404, opening the aluminum tube collector-aluminum tube multi-source heat pump unit circulation solenoid valve 405, closing the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve 408, the aluminum tube collector heat transfer medium circulation pump 404 → aluminum tube collector-aluminum tube multi-source heat pump unit circulation solenoid valve 405 → aluminum tube multi-source heat pump unit 401 → aluminum tube collector 402 → aluminum tube collector heat transfer medium circulation pump 404, the aluminum tube collector heat transfer medium circulates between the aluminum tube collector 402 and the aluminum tube multi-source heat pump unit 401, and the heat energy from the aluminum tube collector 402 is transferred to the aluminum tube multi-source heat pump unit 401.

[0106] The heating cycle of the aluminum pipe multi-source heat pump unit includes: starting the heating circulation pump 406, opening the heating circulation check valve 407, and then proceeding through the following steps: heating circulation pump 406 → heating circulation check valve 407 → return water pipeline 502 → building user end 500 → supply water pipeline 501 → aluminum pipe multi-source heat pump unit 401 → heating circulation pump 406. The building heating and heat dissipation facilities are conventional and commonly used, and will not be shown or described in detail in this invention. The hot water circulates between the aluminum pipe multi-source heat pump unit 401 and the building user end 500. The energy transfer path is: solar energy and air energy → aluminum pipe collector 402 → aluminum pipe multi-source heat pump unit 401 → building heating and heat dissipation facilities.

[0107] like Figures 5 to 8 During the winter heating season, heating is provided by a combination of direct heating from the heat storage facility, water source heat pump heating, and aluminum pipe multi-source heat pump heating. One of these three methods can be used for heating, or multiple methods can be used in parallel operation.

[0108] This invention uses cement mortar or concrete to divide the heat storage into multiple layers according to height differences, for example, three layers. The heat energy of the lower layer is used for heating first, then the heat energy of the middle layer is used for heating, and finally the heat energy of the upper layer is used for heating. The heat energy of the heat storage is used sequentially from the lower layer to the upper layer to prevent the high-grade heat energy of the heat storage from being degraded due to the convection of the water medium in the heat storage, thus realizing the cascade utilization of the heat energy of the heat storage.

[0109] The circulating water return of the heating system flows in the return water pipe 502 at the building user end. When the temperature of the return water is lower than the temperature of a certain heat storage layer in the heat storage pool 10, the heat energy of that heat storage layer can be directly used for heating. The heat storage pool 10 is directly heated when the temperature is above 40℃, and the heat of the lower heat storage layer is used preferentially when the heat storage pool is directly heated. When the temperature is below 40℃, the water source heat pump is used for heating. The heat energy of the water source heat pump comes from the heat storage of the heat storage pool 10 in the temperature range of 0℃ to 40℃. At 0℃, the water in the heat storage pool has not undergone a phase change and is still in a liquid state. The heating system prioritizes the use of the heat energy of the heat storage pool for direct heating. When the temperature of all layers of the heat storage pool is below 40℃, the water source heat pump is used for heating. The operation of the water source heat pump heating is also to utilize the heat energy of the heat storage pool sequentially from the lower layer to the middle layer and then to the upper layer. The water source heat pump heating is also a cascade utilization of the heat energy of the heat storage pool.

[0110] During the heating season, aluminum pipe multi-source heat pumps are used for heating during the day. Due to the presence of solar energy and the high temperature, the energy efficiency of aluminum pipe multi-source heat pumps is relatively high. At night, aluminum pipe multi-source heat pumps and water source heat pumps are used in combination for direct heating of the heat storage facility and combined heating of multi-source heat pumps and water source heat pumps. Optimizing the operation mode can reduce the capacity of multi-source heat pumps and water source heat pumps and the volume of the heat storage facility.

[0111] In the hot storage pool 10, the waste concrete block filling material can be completely or partially replaced by non-metallic solid waste from construction or rocks with a size greater than 1 cm. The volume of the hot storage pool 10 only needs to be designed based on the volumetric specific heat capacity of the solid substitute for the waste concrete block filling material.

[0112] It will be readily understood by those skilled in the art that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cross-seasonal combined heating system based on a dual-medium cross-seasonal thermal storage facility with cascaded utilization, characterized in that, This includes a thermal storage heating system, a water source heat pump heating system, an aluminum pipe multi-source heat pump heating system, and water supply and return pipelines connecting to the building's user terminals, among which: The heating system includes a dual-medium inter-seasonal thermal storage tank; the dual-medium inter-seasonal thermal storage tank includes a thermal storage pool, inlet water pipes, outlet water pipes, and aluminum tube collectors, wherein: The heat storage pool is provided with a first heat storage layer, a second heat storage layer, and a third heat storage layer. The first heat storage layer, the second heat storage layer, and the third heat storage layer are respectively located at the bottom, middle, and top of the heat storage pool. The tops of the first heat storage layer, the second heat storage layer, and the third heat storage layer are hardened to form a first hardened layer, a second hardened layer, and a third hardened layer, respectively. The first hardened layer, the second hardened layer, and the third hardened layer are respectively provided with a first opening and a first outlet, a second opening and a second outlet, and a third opening and a third outlet. The water inlet pipeline includes a first water inlet pipe, a second water inlet pipe, and a third water inlet pipe, wherein the first water inlet pipe extends through the third opening, the second opening, and the first opening to the bottom of the first heat storage layer, the second water inlet pipe extends through the third opening and the second opening to the bottom of the second heat storage layer, and the third water inlet pipe extends through the third opening to the bottom of the third heat storage layer; The water outlet pipeline includes a first water outlet pipe, a second water outlet pipe, and a third water outlet pipe, wherein the first water outlet pipe extends through the third outlet, the second outlet, and the first outlet to the top of the first heat storage layer, the second water outlet pipe extends through the third outlet and the second outlet to the top of the second heat storage layer, and the third water outlet pipe extends through the third outlet to the top of the third heat storage layer; The aluminum tube collector is installed on the top of the heat storage tank and is connected to the inlet and outlet water pipes through a heat exchanger, forming a parallel connection with the heat storage tank. The water supply pipeline is connected to the inlet pipeline of the dual-medium inter-seasonal thermal storage facility, and the outlet pipeline of the dual-medium inter-seasonal thermal storage facility is connected to the return pipeline. The water source heat pump heating system is connected between the water supply pipeline and the return water pipeline, and includes a water source heat pump unit, which is connected in parallel with the heat storage tank; The aluminum pipe multi-source heat pump heating system is connected between the water supply pipeline and the return water pipeline, and includes an aluminum pipe multi-source heat pump unit and an aluminum pipe collector. The water supply pipeline is connected to the first, second, and third inlet pipes of the dual-medium inter-seasonal thermal storage tank via a first inlet pipe solenoid valve, a second inlet pipe solenoid valve, and a third inlet pipe solenoid valve, respectively. The first, second, and third outlet pipes of the dual-medium inter-seasonal thermal storage tank are connected to the return water pipeline via a first outlet pipe solenoid valve, a second outlet pipe solenoid valve, and a third outlet pipe solenoid valve, respectively.

2. The cross-seasonal combined heating system according to claim 1, characterized in that, The heating system of the hot storage facility also includes a hot storage heating circulation pump and a hot storage direct heating circulation solenoid valve, which are installed between the outlet water pipeline and the return water pipeline of the dual-medium inter-seasonal hot storage facility.

3. The cross-seasonal combined heating system according to claim 2, characterized in that, The water source heat pump heating system also includes a water source heat pump unit heating circulation pump, a water source heat pump unit heating circulation check valve, and a heat storage-water source heat pump unit circulation solenoid valve. The water source heat pump unit heating circulation pump and the water source heat pump unit heating circulation check valve are located between the water source heat pump unit and the return water pipeline, and the heat storage-water source heat pump unit circulation solenoid valve is located between the heat storage heating circulation pump and the water source heat pump unit.

4. The inter-seasonal combined heating system according to claim 1, characterized in that, The aluminum pipe multi-source heat pump heating system also includes an aluminum pipe collector heat transfer medium circulation pump, an aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve, an aluminum pipe multi-source heat pump unit heating circulation pump, and an aluminum pipe multi-source heat pump unit heating circulation check valve. The aluminum pipe collector heat transfer medium circulation pump and the aluminum pipe collector-aluminum pipe multi-source heat pump unit circulation solenoid valve are located between the aluminum pipe collector and the aluminum pipe multi-source heat pump unit. The aluminum pipe multi-source heat pump unit heating circulation pump and the aluminum pipe multi-source heat pump unit heating circulation check valve are located between the aluminum pipe multi-source heat pump unit and the return water pipeline.

5. The cross-seasonal combined heating system according to claim 4, characterized in that, A summer energy storage aluminum pipe collector-heat exchanger circulation solenoid valve is installed between the heat transfer medium circulation pump of the aluminum pipe collector and the heat exchanger. The heat exchanger is connected to the outlet and inlet water pipes of the dual-medium inter-seasonal thermal storage tank, and a summer energy storage aluminum pipe collector-thermal storage tank circulation pump is installed between the heat exchanger and the outlet water pipe of the dual-medium inter-seasonal thermal storage tank.

6. A method for cross-seasonal combined heating based on the cross-seasonal combined heating system according to any one of claims 1 to 5, characterized in that, This includes supplemental heating during the non-heating season and heating during the heating season, among which: During the non-heating season, the aluminum pipe collector provides supplemental heat to the dual-medium inter-seasonal thermal storage tank; During the heating season, the cross-seasonal combined heating system provides heating to building users, including direct heating from the thermal storage heating system, heating from the water source heat pump system, and heating from the aluminum pipe multi-source heat pump system, which can operate individually or in combination.

7. The cross-seasonal combined heating method according to claim 6, characterized in that, The aluminum pipe collector's heat supply to the dual-medium inter-seasonal thermal storage includes a heat transfer medium circulation between the aluminum pipe collector and the heat exchanger, and a hot water circulation between the heat exchanger and the thermal storage, wherein: The heat transfer medium circulation of the aluminum tube collector-heat exchanger includes: starting the heat transfer medium circulation pump of the aluminum tube collector, opening the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve, and the heat transfer medium of the aluminum tube collector returning to the heat transfer medium circulation pump of the aluminum tube collector via the heat transfer medium circulation pump of the aluminum tube collector through the summer energy storage aluminum tube collector-heat exchanger circulation solenoid valve → heat exchanger → aluminum tube collector. The heat exchanger-heat storage hot water circulation includes: starting the summer energy storage aluminum pipe collector-heat storage circulation pump, opening the third outlet pipe solenoid valve and the first inlet pipe solenoid valve, and the heat storage hot water is transported from the aluminum pipe collector-heat storage circulation pump through the third outlet pipe solenoid valve → third outlet pipe → heat storage → first inlet pipe → first inlet pipe solenoid valve → heat exchanger → summer energy storage aluminum pipe collector-heat storage circulation pump.

8. The cross-seasonal combined heating method according to claim 6, characterized in that, The direct heating system of the hot storage facility includes: If the temperature of the hot water in the hot storage is higher than the temperature threshold, the hot storage heating system will provide direct heating, the hot storage heating circulation pump will start, the hot storage direct heating circulation solenoid valve will open, and the hot storage-water source heat pump unit circulation solenoid valve will close. The hot storage water will circulate between the dual-medium inter-seasonal hot storage and the building user end through the water supply pipeline and the return water pipeline.

9. The cross-seasonal combined heating method according to claim 8, characterized in that, First, the first thermal storage layer directly supplies heating. The first outlet pipe solenoid valve and the first inlet pipe solenoid valve are opened, while the second outlet pipe solenoid valve, the second inlet pipe solenoid valve, the third outlet pipe solenoid valve, and the third inlet pipe solenoid valve are closed. The hot water circulates between the dual-medium inter-seasonal thermal storage and the building user end through the first thermal storage layer. When the temperature of the hot water in the first thermal storage layer is lower than the temperature threshold and the temperature of the hot water in the second thermal storage layer is higher than the temperature threshold, the second thermal storage layer directly provides heating. The second outlet pipe solenoid valve and the second inlet pipe solenoid valve open, while the first outlet pipe solenoid valve, the first inlet pipe solenoid valve, the third outlet pipe solenoid valve, and the third inlet pipe solenoid valve close. The hot water circulates through the second thermal storage layer between the dual-medium inter-seasonal thermal storage and the building user end. When the water temperature in the first and second thermal storage layers is below the temperature threshold, and the water temperature in the third thermal storage layer is above the temperature threshold, the third thermal storage layer directly provides heating. The third outlet pipe solenoid valve and the third inlet pipe solenoid valve open, while the first outlet pipe solenoid valve, the first inlet pipe solenoid valve, the second outlet pipe solenoid valve, and the second inlet pipe solenoid valve close. The thermal storage water circulates through the third thermal storage layer between the dual-medium inter-seasonal thermal storage and the building user end.

10. The cross-seasonal combined heating method according to claim 6, characterized in that, The heating provided by the water source heat pump heating system includes: When the temperature of the hot water in the thermal storage facility is below the temperature threshold, heating is provided by a water source heat pump heating system, which includes a thermal storage-water source heat pump unit cycle and a water source heat pump unit heating cycle, wherein: The circulation of the hot storage-water source heat pump unit is as follows: the hot storage heating circulation pump starts, the hot storage-water source heat pump unit circulation solenoid valve opens, the hot storage direct heating circulation solenoid valve closes, the first inlet pipe solenoid valve and the third outlet pipe solenoid valve open, and the hot storage water circulates between the dual-medium inter-seasonal hot storage and the water source heat pump unit. The low-temperature heat energy from the hot storage pool is transferred to the water source heat pump unit. The heating cycle of the water source heat pump unit involves starting the heating cycle pump of the water source heat pump unit, opening the heating cycle check valve of the water source heat pump unit, and circulating the hot water in the heat storage through the water supply pipeline and the return pipeline between the water source heat pump unit and the building user end, so that the heat energy of the water source heat pump unit can be delivered to the building user end.

11. The cross-seasonal combined heating method according to claim 6, characterized in that, The aluminum pipe multi-source heat pump heating system includes a heat transfer medium circulation between the aluminum pipe collector and the aluminum pipe multi-source heat pump unit, and a heating circulation of the aluminum pipe multi-source heat pump unit, wherein: The heat transfer medium circulation of the aluminum tube collector-aluminum tube multi-source heat pump unit includes: starting the heat transfer medium circulation pump of the aluminum tube collector, opening the circulation solenoid valve of the aluminum tube collector-aluminum tube multi-source heat pump unit, closing the circulation solenoid valve of the energy storage aluminum tube collector-heat exchanger in summer, circulating the heat transfer medium of the aluminum tube collector between the aluminum tube collector and the aluminum tube multi-source heat pump unit, and transferring the heat energy from the aluminum tube collector to the aluminum tube multi-source heat pump unit. The heating cycle of the aluminum pipe multi-source heat pump unit includes: starting the heating cycle pump of the aluminum pipe multi-source heat pump unit, opening the heating cycle check valve of the aluminum pipe multi-source heat pump unit, circulating the hot water between the aluminum pipe multi-source heat pump unit and the building user end, and delivering the heat energy of the aluminum pipe multi-source heat pump unit to the building user end.

Images