Cold and hot storage shaft type rotary buried pipe energy supply system

Abstract

The utility model provides a cold and heat storage shaft type rotary buried pipe energy supply system. The system comprises a pipe network, a rotary buried pipe energy storage assembly, a cold storage assembly, a heat storage assembly, an energy supply assembly and a hot water supply assembly. Compared with a system in the prior art, four operation modes of cold storage, heat storage, energy supply and hot water supply can be achieved. Particularly, the rotary buried pipe energy storage assembly is additionally arranged and used in cooperation with other assemblies, and the energy supply efficiency can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to clean energy supply field, especially a kind of wellbore type rotary buried pipe energy supply system of cold and hot dual storage. BACKGROUND

[0002] As a key technical means, ground source heat pump technology has been widely used in the exploitation of geothermal energy. Among them, the ground source heat pump system is a closed loop system that uses the heat of underground rock-soil or groundwater, and realizes heat transfer between the system and the earth through the flow of circulating liquid in the closed underground buried pipe. It releases heat to the earth and absorbs cold in summer, and releases cold to the earth and absorbs heat in winter by investing a small amount of high potential energy. It is an energy-saving and environment-friendly heating and refrigeration technology, which is widely used in building heating and refrigeration.

[0003] However, the initial condition of the underground is warm in winter and cool in summer. The newly built ground source heat pump system has high energy efficiency in the first few years. As the running time of the ground source heat pump system increases, the underground temperature deviates from the original ground temperature, resulting in the accumulation of cold / heat year by year, reducing the running efficiency of the ground source heat pump system, and even unable to run. Therefore, artificial heating or cooling is needed to maintain the cold and heat balance of the underground. In addition, the traditional vertical U-shaped buried pipe commonly used in ground source heat pump systems has problems such as large number of drillings, high cost, and slow heat storage speed, which is not conducive to the construction of energy storage systems. Therefore, how to speed up the rate of cold storage / heat storage to improve the utilization efficiency of ground source heat pump is more important. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems existing in the prior art, the utility model provides a kind of wellbore type rotary buried pipe energy supply system of cold and hot dual storage, comprising:

[0005] Pipe network;

[0006] Rotary buried pipe energy storage assembly communicated with the water inlet end and water outlet end of pipe network respectively, the rotary buried pipe energy storage assembly is used to store cold or heat;

[0007] Cold storage assembly for cold storage cycle communicated with the water inlet end and water outlet end of rotary buried pipe energy storage assembly, the water outlet end of the cold storage assembly is communicated with the water inlet end of rotary buried pipe energy storage assembly, and the water inlet end of the cold storage assembly is communicated with the water outlet end of rotary buried pipe energy storage assembly;

[0008] Heat storage assembly for heat storage cycle communicated with the water inlet end and water outlet end of rotary buried pipe energy storage assembly, the water outlet end of the heat storage assembly is communicated with the water inlet end of rotary buried pipe energy storage assembly, and the water inlet end of the heat storage assembly is communicated with the water outlet end of rotary buried pipe energy storage assembly;

[0009] Energy supply assembly for heating cycle or cooling cycle for user side communicated with the water inlet end and water outlet end of rotary buried pipe energy storage assembly.

[0010] and a hot water supply component in communication with the heat storage component for supplying water to users.

[0011] Based on the above scheme, the rotating buried pipe energy storage assembly includes a wellbore pile buried in the inner layer of the soil, a double-layer steel cage for support arranged inside the wellbore pile, and a double-layer water pipe spirally wound on the double-layer steel cage for water circulation.

[0012] On the basis of the above solution, the double-layer steel cage includes an outer steel cage and an inner steel cage arranged inside the outer steel cage;

[0013] The double-layer water pipe includes an outer water pipe spirally wound around the outer steel cage in a clockwise manner and an inner water pipe spirally wound around the inner steel cage in a clockwise manner.

[0014] Based on the above scheme, it also includes: an energy storage component water inlet pipe connected to the water inlet end of the double-layer water pipe through an inlet pipe tee and an energy storage component water outlet pipe connected to the water inlet end and the water outlet end of the double-layer water pipe through an outlet pipe tee.

[0015] Based on the above solution, the cold storage component includes a cooling tower;

[0016] The water outlet of the cooling tower is connected to the cooling tower water outlet pipe, and the water inlet of the cooling tower is connected to the cooling tower water inlet pipe;

[0017] The water outlet end of the cooling tower water outlet pipe is connected to the water inlet end of the energy storage component water inlet pipe for outputting cold water after spraying and cooling. The water inlet end of the cooling tower water inlet pipe is connected to the water outlet end of the energy storage component water outlet pipe for inputting water whose temperature is increased by the rotating buried pipe energy storage component.

[0018] On the basis of the above solution, the cooling tower outlet pipe is provided with a cold storage component water outlet solenoid valve for opening and closing the cooling tower outlet pipe and controlling the opening and closing degree of the flow path in the cooling tower outlet pipe, a first three-way valve for connecting the water outlet end of the thermal storage component, a second three-way valve for connecting the water outlet end of the energy supply component, and an energy storage component water inlet control valve for opening and closing the energy storage component water inlet pipe in sequence along the fluid flow direction;

[0019] The cooling tower water inlet pipe is sequentially provided with an energy storage component water outlet control valve for opening and closing the energy storage component water outlet pipe, a third tee for circulating the water inlet end of the energy supply component, a fourth tee for connecting the water inlet end of the heat storage component, a cold storage component water inlet solenoid valve for opening and closing the cooling tower water inlet pipe and controlling the opening and closing degree of the flow path in the cooling tower water inlet pipe, and a cooling tower circulating water pump for providing water supply power for the cooling tower.

[0020] Based on the above solution, the heat storage component includes a solar collector and a heat storage tank;

[0021] Among them, the water outlet end of the solar thermal collector is connected to the water inlet end of the hot water storage tank through the collector water outlet pipe, and the water inlet end of the solar thermal collector is connected to the water outlet end of the hot water storage tank through the collector water inlet pipe; the water outlet end of the hot water storage tank is connected to the first tee through the hot water storage tank outlet pipe for flowing high-temperature water into the rotating buried pipe energy storage assembly for storage, and the water inlet end of the hot water storage tank is connected to the fourth tee through the hot water storage tank inlet pipe for inputting low-temperature water from the rotating buried pipe energy storage assembly.

[0022] On the basis of the above solution, the water outlet pipe of the hot water storage tank is provided with a fifth three-way connection for connecting to the water inlet end of the hot water supply assembly and a water outlet solenoid valve of the heat storage assembly for opening and closing the water outlet pipe of the hot water storage tank and controlling the opening degree of the flow path in the water outlet pipe of the hot water storage tank in sequence along the fluid flow direction;

[0023] The water inlet pipe of the hot water storage tank is provided with a heat storage component water inlet control valve for opening and closing the water inlet pipe of the hot water storage tank, a sixth three-way valve for connecting to the water outlet end of the hot water supply component, and a heat storage component circulating water pump for providing water supply power to the hot water storage tank in sequence along the fluid flow direction;

[0024] The collector outlet pipe is provided with a collector outlet control valve for opening and closing the collector outlet pipe, and the collector inlet pipe is provided with a collector inlet control valve for opening and closing the collector inlet pipe.

[0025] Based on the above solution, the energy supply component includes a ground source heat pump and a user side;

[0026] Among them, the underground side of the ground source heat pump is connected to the rotating buried pipe energy storage assembly through the ground source heat pump water inlet pipe and the ground source heat pump water outlet pipe; the air conditioning side of the ground source heat pump is connected to the user side through the energy supply module water supply pipe and the energy supply module return pipe.

[0027] Based on the above solution, the hot water supply assembly includes a plate heat exchanger;

[0028] The first water inlet end of the plate heat exchanger is connected to the fifth tee through the first heat exchanger water inlet pipe for inputting high-temperature water in the hot water storage tank; the second water inlet end of the plate heat exchanger is connected to the second heat exchanger water inlet pipe for inputting low-temperature water for heat exchange;

[0029] The first water outlet end of the plate heat exchanger is connected to the sixth tee through the first plate heat exchanger outlet pipe to flow the low-temperature water in the plate heat exchanger to the hot water storage tank for reheating; the second water outlet end of the plate heat exchanger is connected to the second heat exchanger outlet pipe to supply high-temperature water to users.

[0030] Compared to existing systems, the present invention maximizes the use of natural energy sources such as dry air, solar energy, and geothermal energy, resolving the problem of underground heat and cold imbalances. It achieves integrated energy supply and storage, enabling sustainable utilization of geothermal resources and enabling four operating modes: cold storage, heat storage, energy supply, and hot water supply. This truly achieves integrated supply and storage, while also being simple and easy to install and maintain. In particular, the rotating buried pipe energy storage assembly effectively addresses the issues of traditional ground-source heat pump systems, such as the large number of drilled holes, high cost, and slow heat storage rate associated with the U-shaped tubes. The combined use of the cold and heat storage assemblies with the rotating buried pipe energy storage assembly improves cold and heat storage rates and efficiency compared to conventional U-shaped buried pipe energy storage assemblies. Furthermore, the use of transitional cooling towers for cold storage and solar heat storage for "dual cold and heat storage" overcomes the limitations of traditional single-energy storage methods. Furthermore, cross-seasonal energy storage improves heat pump efficiency, facilitating long-term stable operation of the system and enabling sustainable utilization of geothermal resources. Furthermore, the components of the present invention are easy to purchase and assemble, resulting in low production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of the wellbore type rotary buried pipe energy supply system with dual cold and hot storage in Example 1 of the present utility model;

[0032] Figure 2 This is a schematic structural diagram of the rotary buried pipe energy storage assembly in Example 1 of the present utility model (showing a cross-sectional view);

[0033] Figure 3 This is a schematic structural diagram of the rotary buried pipe energy storage assembly in Example 1 of the present utility model;

[0034] Figure 4 This is a schematic diagram of the cold storage mode in Example 1 of the present utility model (showing the cold storage component);

[0035] Figure 5 This is a schematic diagram of the heat storage mode in Example 1 of the present utility model (showing the heat storage component);

[0036] Figure 6 This is a schematic diagram of the energy supply mode in Example 1 of the present utility model (showing the energy supply components);

[0037] Figure 7 This is a schematic diagram of the hot water supply mode in Example 1 of the present utility model (showing the hot water supply components). DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments described below are intended to facilitate understanding of the present invention and do not have any limiting effect on the present invention.

[0039] Example 1

[0040] like Figure 1 As shown, the utility model provides a wellbore type rotary buried pipe energy supply system with dual cold and hot storage, comprising:

[0041] Pipeline network 1;

[0042] A rotating buried pipe energy storage assembly 2 for storing cold or heat, connected to the water inlet and outlet of the pipe network 1 respectively;

[0043] A cold storage component 3 for cold storage circulation, connected to the water inlet and outlet of the rotary buried pipe energy storage component 2;

[0044] A heat storage component 4 for heat storage cycle, which is in communication with the water inlet and outlet of the rotary buried pipe energy storage component 2;

[0045] An energy supply component 5 connected to the water inlet and outlet of the rotary buried pipe energy storage component 2 for performing a heating cycle or a cooling cycle for the user side;

[0046] A hot water supply component 6 is connected to the heat storage component 4 and is used to supply water to users.

[0047] Among them, the water outlet end of the heat storage component 4 and the water outlet end of the cold storage component 3 are connected to the water inlet end of the rotating buried pipe energy storage component 2, and the water outlet end of the rotating buried pipe energy storage component 2 is connected to the water inlet end of the cold storage component 3 and the water inlet end of the heat storage component 4.

[0048] The above-mentioned system of the present invention includes a dry air energy cold storage component, a solar energy heat storage component, a rotating buried pipe energy storage component and a ground source heat pump energy supply component, which can provide users with cold storage, heat storage, energy supply or hot water supply, and can provide one energy supply mode alone or both heat storage and hot water supply.

[0049] like Figure 2 As shown, as a specific implementation scheme, the rotating buried pipe energy storage assembly 2 includes a wellbore pile 2-1 buried in the inner layer of the soil, a double-layer steel cage 2-2 for support arranged inside the wellbore pile 2-1, and a double-layer water pipe 2-3 spirally wound on the double-layer steel cage 2-2 for water circulation.

[0050] The double-layer steel cage 2-2 includes an outer steel cage 2-2-1 and an inner steel cage 2-2-2 arranged inside the outer steel cage 2-2-1.

[0051] The double-layer water pipe 2-3 includes an outer water pipe 2-3-1 spirally wound clockwise around the outer steel cage 2-2-1, and an inner water pipe 2-3-2 spirally wound clockwise around the inner steel cage 2-2-2. Specifically, the outer water pipe 2-3-1 is spirally wound clockwise downward from the top of the outer steel cage 2-2-1, spirally wound to the bottom of the outer steel cage 2-2-1, and then vertically extended along the inner side of the shaft pile 2-1 to the ground. The inner water pipe 2-3-2 is spirally wound clockwise downward from the top of the inner steel cage 2-2-2, spirally wound to the bottom of the inner steel cage 2-2-2, and then vertically extended along the inner side of the shaft pile 2-1 to the ground.

[0052] like Figure 2-Figure 3 As shown, in order to realize the diversion of the fluid, it also includes: an energy storage component water inlet pipe 2-5 that is interconnected with the water inlet end of the outer water pipe 2-3-1 and the water inlet end of the inner water pipe 2-3-2 through the water inlet pipe tee 2-4, and an energy storage component water outlet pipe 2-7 that is interconnected with the water outlet end of the outer water pipe 2-3-1 and the water outlet end of the inner water pipe 2-3-2 through the water outlet pipe tee 2-6.

[0053] The shaft pile 2-1 is a double-layer cylindrical structure, and the space between the double-layer cylindrical walls is filled with original soil as a medium layer 2-16 for energy storage and heat preservation.

[0054] To further monitor parameters such as pressure, temperature, and flow, the system also includes a water inlet valve 2-8, a water inlet flow meter 2-9, a water inlet pressure gauge 2-10, and a water inlet thermometer 2-11, arranged along the fluid flow direction on the water inlet pipe 2-5 of the energy storage assembly. The wellbore pile 2-1 is internally equipped with a data acquisition device 2-17, a temperature measurement optical fiber 2-18, and a temperature probe 2-19 for measuring the cold and hot storage temperatures and collecting data.

[0055] It also includes: a water outlet pipe thermometer 2-12, a water outlet pipe pressure gauge 2-13, a water outlet pipe flow meter 2-14 and a water outlet pipe valve 2-15 arranged on the water outlet pipe 2-7 of the energy storage component along the fluid flow direction.

[0056] In this embodiment, the energy storage component water inlet pipe 2-5, the energy storage component water outlet pipe 2-7, the input end of the outer water pipe 2-3-1, the input end of the inner water pipe 2-3-2, the output end of the outer water pipe 2-3-1, and the output end of the inner water pipe 2-3-2 are all PE pipes with a diameter of 32 cm.

[0057] The rotating buried pipe energy storage assembly 2 utilizes the thermal insulation properties of the ground to store solar heat underground. Unlike traditional spiral buried pipe heat storage devices, the present invention provides a wellbore-type double-layer rotating buried pipe heat storage system that uses two pipes wrapped around the outer and inner steel cages, increasing the heat storage capacity, speed, and performance.

[0058] like Figure 4 As shown, as a specific implementation scheme, the cold storage component 3 includes a cooling tower 3-1, wherein the water outlet end of the cooling tower 3-1 is connected to the cooling tower water outlet pipe 3-1-1, and the water inlet end of the cooling tower 3-1 is connected to the cooling tower water inlet pipe 3-1-2; the water outlet end of the cooling tower water outlet pipe 3-1-1 is connected to the water inlet end of the energy storage component water inlet pipe 2-5 for outputting cold water after spraying and cooling, and the water inlet end of the cooling tower water inlet pipe 3-1-2 is connected to the water outlet end of the energy storage component water outlet pipe 2-7 for inputting water after the temperature is increased by the rotating buried pipe energy storage component 2.

[0059] On the basis of the above scheme, the cooling tower outlet pipe 3-1-1 is provided with a cold storage component water outlet solenoid valve 3-2 for opening and closing the cooling tower outlet pipe 3-1-1 and controlling the opening and closing degree of the flow path in the cooling tower outlet pipe 3-1-1, a first three-way valve 3-3 for connecting the water outlet end of the heat storage component 4, a second three-way valve 3-4 for connecting the water outlet end of the energy supply component 5 and an energy storage component water inlet control valve 3-10 for opening and closing the energy storage component water inlet pipe 2-5 in sequence along the fluid flow direction.

[0060] The cooling tower water inlet pipe 3-1-2 is sequentially provided with an energy storage component water outlet control valve 3-5 for opening and closing the energy storage component water outlet pipe 2-7, a third three-way valve 3-6 for circulating the water inlet end of the energy supply component 5, a fourth three-way valve 3-7 for connecting the water inlet end of the heat storage component 4, a cold storage component water inlet solenoid valve 3-8 for opening and closing the cooling tower water inlet pipe 3-1-2 and controlling the opening degree of the flow path in the cooling tower water inlet pipe 3-1-2, and a cooling tower circulating water pump 3-9 for providing water supply power for the cooling tower 3-1.

[0061] When the cold storage mode is running, the cold storage component water inlet solenoid valve 3-8, the cooling tower circulating water pump 3-9, the cold storage component water outlet solenoid valve 3-2, the energy storage component water inlet control valve 3-10 and the energy storage component water outlet control valve 3-5 are opened, and the other valves and water pumps are closed. The cold water generated by the cooling tower 3-1 flows through the cooling tower outlet pipe 3-1-1, the first tee 3-3 and the second tee 3-4, and is diverted through the water inlet pipe tee 2-4 to the water inlet ends of the inner and outer water pipes 2-3-1 and the inner water pipe 2-3-2 of the rotating buried pipe energy storage assembly 2, and flows into the underground rotating pipe. When flowing through the rotating pipe, the cold water dissipates the cold energy to the medium layer 2-16 for storage. The cold water with increased temperature passes through the outlet ends of the inner and outer water pipes 2-3-1 and the inner water pipe 2-3-2 of the energy storage assembly, and is merged through the water outlet pipe tee 2-6 to the energy storage assembly outlet pipe 2-7, and then flows into the cooling tower 3-1 through the cooling tower inlet pipe 3-1-2, where water is sprayed for cooling, and the next cold storage cycle begins.

[0062] like Figure 5As shown, as a specific implementation scheme, the heat storage component 4 includes a solar collector 4-1 and a hot water storage tank 4-2, and the heat collected by the solar collector 4-1 is stored in the hot water storage tank 4-2, wherein the water outlet end of the solar collector 4-1 is connected to the water inlet end of the hot water storage tank 4-2 through the collector water outlet pipe 4-1-1, and the water inlet end of the solar collector 4-1 is connected to the water outlet end of the hot water storage tank 4-2 through the collector water inlet pipe 4-1-2; the water outlet end of the hot water storage tank 4-2 is connected to the first tee 3-3 through the hot water storage tank outlet pipe 4-2-1 for flowing high-temperature water into the rotary buried tube energy storage component 2 for storage, and the water inlet end of the hot water storage tank 4-2 is connected to the fourth tee 3-7 through the hot water storage tank inlet pipe 4-2-2 for inputting low-temperature water into the rotary buried tube energy storage component 2.

[0063] Based on the above solution, the hot water tank outlet pipe 4-2-1 is provided with a fifth three-way valve 4-3 for connecting to the water inlet of the hot water supply assembly 6, and a thermal storage assembly water outlet solenoid valve 4-4 for opening and closing the hot water tank outlet pipe 4-2-1 and controlling the opening degree of the flow path within the hot water tank outlet pipe 4-2-1. The hot water tank inlet pipe 4-2-2 is provided with a thermal storage assembly water inlet control valve 4-5 for opening and closing the hot water tank inlet pipe 4-2-2, a sixth three-way valve 4-6 for connecting to the water outlet of the hot water supply assembly 6, and a thermal storage assembly circulating water pump 4-7 for providing water supply power to the hot water tank 4-2.

[0064] On the basis of the above scheme, a collector outlet control valve 4-8 for opening and closing the collector outlet pipe 4-1-1 is provided on the collector outlet pipe 4-1-1, and a collector inlet control valve 4-9 for opening and closing the collector inlet pipe 4-1-2 is provided on the collector inlet pipe 4-1-2.

[0065] When the heat storage mode is in operation: open the collector water outlet control valve 4-8, the heat storage component water outlet solenoid valve 4-4, the energy storage component water inlet control valve 3-10, the energy storage component water outlet control valve 3-5, the heat storage component water inlet control valve 4-5, the collector water inlet control valve 4-9 and the heat storage component circulating water pump 4-7, and the remaining valves and water pumps are closed. The water in the heat storage water tank 4-2 flows into the solar collector 4-1 through the collector inlet pipe 4-1-2, absorbs solar energy in the solar collector 4-1, and then passes through the collector outlet pipe 4-1-1 to increase the water temperature and enter the heat storage water tank 4-2, completing the solar energy collection; the hot water stored in the heat storage water tank 4-2 flows in turn through the heat storage tank outlet pipe 4-2-1, the cooling tower outlet pipe 3-1-1, the energy storage component inlet pipe 2-5, and passes through the inlet pipe tee. The hot water 2-4 is divided into the outer water pipe 2-3-1 and the inner water pipe 2-3-2, and flows into the underground rotating pipe. When the hot water flows through the rotating pipe, it dissipates heat into the medium layer 2-16 for storage. The hot water with reduced temperature passes through the outer water pipe 2-3-1 and the inner water pipe 2-3-2, and is combined through the outlet pipe tee 2-6 to the energy storage component outlet pipe 2-7. Then, it flows into the hot water storage tank 4-2 through the hot water storage tank inlet pipe 4-2-2 to start the next heat storage cycle.

[0066] like Figure 6 As shown, as a specific implementation scheme, the energy supply component 5 includes a ground source heat pump 5-1 and a user side 5-2, wherein the underground side of the ground source heat pump 5-1 is connected to the rotating buried pipe energy storage component 2 through the ground source heat pump water inlet pipe 5-1-1 and the ground source heat pump water outlet pipe 5-1-2; the air-conditioning side of the ground source heat pump 5-1 is connected to the user side 5-2 through the energy supply module water supply pipe 5-2-2 and the energy supply module return pipe 5-2-1.

[0067] On the basis of the above scheme, at the water inlet end of the ground source heat pump 5-1, a ground source heat pump circulating water pump 5-3 for providing water supply power for the ground source heat pump 5-1 and a ground source heat pump water inlet control valve 5-4 for opening and closing the ground source heat pump water inlet pipe 5-1-1 are sequentially arranged along the fluid flow direction; an energy supply module return water control valve 5-5 for opening and closing the energy supply module return water pipe 5-2-1 is arranged on the energy supply module return water pipe 5-2-1. At the water outlet of the ground source heat pump 5-1, a ground source heat pump outlet control valve 5-6 for opening and closing the ground source heat pump outlet pipe 5-1-2 is provided on the ground source heat pump outlet pipe 5-1-2; an energy supply component water supply control valve 5-7 for opening and closing the energy supply module water supply pipe 5-2-2 and an energy supply component circulating water pump 5-8 for providing water supply power to the user side 5-2 are sequentially provided on the energy supply module water supply pipe 5-2-2 along the fluid flow direction.

[0068] When the energy supply component 5 is in use: open the energy storage component water inlet control valve 3-10, the energy storage component water outlet control valve 3-5, the ground source heat pump water inlet control valve 5-4, the energy supply component return water control valve 5-5, the energy supply component water supply control valve 5-7, the ground source heat pump water outlet control valve 5-6, the ground source heat pump circulating water pump 5-3 and the energy supply component circulating water pump 5-8, and the remaining valves and water pumps are all closed. During summer cooling, the ground source heat pump 5-1 transfers the heat from the user side 5-2 to the rotary buried pipe energy storage assembly 2 below the ground through the ground source heat pump outlet pipe 5-1-2 and the energy storage assembly inlet pipe 2-5, extracts the cold energy in the rotary buried pipe energy storage assembly 2 to the ground source heat pump 5-1 through the energy storage assembly outlet pipe 2-7 and the ground source heat pump inlet pipe 5-1-1, and supplies it to the user side 5-2 through the energy supply module water supply pipe 5-2-2. During winter heating, the ground source heat pump 5-1 extracts the cold energy from the rotary buried pipe energy storage assembly 2 below the ground through the energy storage assembly outlet pipe 2-7 and the ground source heat pump inlet pipe 5-1-1, and supplies it to the user side 5-2 through the energy supply module water supply pipe 5-2-2. Heat is extracted from the rotating buried pipe energy storage assembly 2, and hot water enters the ground source heat pump 5-1 through the energy storage assembly outlet pipe 2-7 and the ground source heat pump inlet pipe 5-1-1. After further temperature increase in the ground source heat pump 5-1, it is transported to the user side 5-2 for heating. The ground source heat pump 5-1 transports the cold energy from the user side 5-2 through the ground source heat pump outlet pipe 5-1-2 and the energy storage assembly inlet pipe 2-5 to the medium layer 2-16 of the rotating buried pipe energy storage assembly 2 below the ground, completing the cooling and heating cycle.

[0069] like Figure 7 As shown in a specific embodiment, the hot water supply assembly 6 includes a plate heat exchanger 6-1. The first water inlet of the plate heat exchanger 6-1 is connected to the fifth tee 4-3 via the first heat exchanger inlet pipe 6-1-1 for inputting high-temperature water from the hot water storage tank 4-2. The second water inlet of the plate heat exchanger 6-1 is connected to the second heat exchanger inlet pipe 6-1-2 for inputting low-temperature water for heat exchange. The first water outlet of the plate heat exchanger 6-1 is connected to the sixth tee 4-6 via the first plate heat exchanger outlet pipe 6-1-3 for flowing the low-temperature water from the plate heat exchanger 6-1 to the hot water storage tank 4-2 for reheating. The second water outlet of the plate heat exchanger 6-1 is connected to the second heat exchanger outlet pipe 6-1-4 for supplying high-temperature water to the user.

[0070] Based on the above solution, a first control valve 6-2 for opening and closing the first heat exchanger inlet pipe 6-1-1 is provided on the first heat exchanger inlet pipe 6-1-1, and a second control valve 6-3 for opening and closing the second heat exchanger inlet pipe 6-1-2 is provided on the second heat exchanger inlet pipe 6-1-2. A third control valve 6-4 for opening and closing the first plate heat exchanger outlet pipe 6-1-3 is provided on the first plate heat exchanger outlet pipe 6-1-3, and a fourth control valve 6-5 for opening and closing the second heat exchanger outlet pipe 6-1-4 is provided on the second heat exchanger outlet pipe 6-1-4.

[0071] When operating in hot water supply mode: open the collector water outlet control valve 4-8, the collector water inlet control valve 4-9, the first control valve 6-2, the third control valve 6-4, the second control valve 6-3, the fourth control valve 6-5 and the heat storage component circulating water pump 4-7, and the remaining valves and water pumps are closed. The water in the hot water storage tank 4-2 flows into the solar collector 4-1 through the collector inlet pipe 4-1-2, absorbs solar energy in the solar collector 4-1 to raise the water temperature, and then enters the hot water storage tank 4-2 through the collector outlet pipe 4-1-1, completing the solar energy collection. The hot water in the hot water storage tank 4-2 enters the plate heat exchanger 6-1 through the hot water storage tank outlet pipe 4-2-1 and the first heat exchanger inlet pipe 6-1-1, and exchanges heat with the water from the second heat exchanger inlet pipe 6-1-2 (the return water of domestic hot water). The water with a lower temperature after the heat exchange enters the hot water storage tank 4-2 through the first plate heat exchanger outlet pipe 6-1-3 and the hot water storage tank inlet pipe 4-2-2, and is heated again. The water in the second heat exchanger inlet pipe 6-1-2 is heated by the hot water from the hot water storage tank 4-2 and is supplied to users through the second heat exchanger outlet pipe 6-1-4, thus realizing the supply of domestic hot water.

[0072] The above-mentioned system of the present invention can realize four operation modes of cold storage, heat storage, energy supply and hot water supply, truly realizing the integration of supply and storage, and the system is simple and easy to install and maintain.

[0073] Example 2

[0074] A method for supplying energy to a wellbore type rotary buried pipe with dual cold and heat storage is disclosed. The device adopts the device in Example 1. In this embodiment, the cold storage mode is operated in spring, the dry air energy cold storage component 3 and the rotary buried pipe energy storage component 2 are turned on, and the ground source heat pump energy supply component 5 and the solar heat storage component 4 are turned off; specifically, the cooling tower 3-1 is connected to the cooling tower water inlet pipe 3-1-2 and the cooling tower water outlet pipe 3-1-1. The cooling tower 3-1 is used for cooling in spring, and the produced cold water is transported to the rotary buried pipe energy storage component 2 through the cooling tower water outlet pipe 3-1-1.

[0075] In autumn, the heat storage mode is operated. The heat storage mode and the hot water supply mode can be operated at the same time. The solar heat storage component 4 and the rotary buried pipe energy storage component 2 are turned on, and the ground source heat pump energy supply component 5 and the dry air energy cold storage component 3 are turned off.

[0076] In the energy supply mode in summer and winter, the ground source heat pump energy supply component 5 and the rotary buried pipe energy storage component 2 are turned on, and the dry air energy cold storage component 3 and the solar energy heat storage component 4 are turned off.

[0077] In this embodiment, the solar thermal storage assembly 4 includes a solar thermal collector 4-1, a hot water storage tank 4-2, and a plate heat exchanger 6-1. The solar thermal collector 4-1 and the hot water storage tank 4-2 are connected via the collector inlet pipe 4-1-2 and the collector outlet pipe 4-1-1. The heat collected by the solar thermal collector 4-1 is stored in the hot water storage tank 4-2. The hot water stored in the hot water storage tank 4-2 is output via the hot water storage tank outlet pipe 4-2-1. A portion of the hot water is delivered to the rotary buried pipe energy storage assembly 2 via the cooling tower outlet pipe 3-1-1, and the other portion is delivered to the plate heat exchanger 6-1 via the first heat exchanger inlet pipe 6-1-1. In the plate heat exchanger 6-1, heat is exchanged with the domestic hot water return water from the second heat exchanger inlet pipe 6-1-2. The hot water from the rotary buried pipe The return water of the buried pipe energy storage assembly 2 and the return water from the plate heat exchanger 6-1 return to the hot water storage tank 4-2 through the hot water storage tank inlet pipe 4-2-2 and the first plate heat exchanger outlet pipe 6-1-3 respectively; the collector inlet pipe 4-1-2 and the collector outlet pipe 4-1-1 are respectively provided with a collector inlet control valve 4-9 and a collector outlet control valve 4-8; the hot water storage tank outlet pipe 4-2-1 and the hot water storage tank inlet pipe 4-2-2 are respectively provided with a heat storage assembly water outlet solenoid valve 4-4 and a heat storage assembly water inlet control valve 4-5; the hot water storage tank inlet pipe 4-2-2 is provided with a heat storage assembly circulating water pump 4-7.

[0078] In this embodiment, the energy storage device of the rotary buried pipe energy storage assembly 2 is an underground shaft type rotary pipe accumulator. The water outlet of the shaft type rotary pipe accumulator is output through the energy storage assembly outlet pipe 2-7, part of which is output to the dry air energy cold storage / solar energy storage assembly 4, and the other part is output to the ground source heat pump energy supply assembly 5 through the ground source heat pump inlet pipe 5-1-1. The return water of the dry air energy cold storage / solar energy storage assembly entering the cooling tower outlet pipe 3-1-1 and the return water of the ground source heat pump energy supply assembly 5 entering the ground source heat pump outlet pipe 5-1-2 are returned to the energy storage assembly inlet pipe 2-5 and then return to the shaft type rotary pipe accumulator, completing the water supply and return cycle of the rotary buried pipe energy storage assembly; the shaft type rotary pipe accumulator is provided with an inner layer steel cage 2-2-2 and the outer steel cage 2-2-1; the energy storage component water inlet pipe 2-5 is connected to the water inlet ends of the outer water pipe 2-3-1 and the inner water pipe 2-3-2 through the water inlet pipe tee 2-4; the energy storage component water outlet pipe 2-7 is connected to the water outlet ends of the outer water pipe 2-3-1 and the inner water pipe 2-3-2 through the water outlet pipe tee 2-6; the energy storage component water inlet pipe 2-5 is provided with an energy storage component water inlet control valve 3-10 and an energy storage component water outlet control valve 3-5; the outer water pipe 2-3-1 and the inner water pipe 2-3-2 are respectively wound around the surface of the double-layer steel cage 2-2.

[0079] By using the system and method of this embodiment, natural energy sources such as dry air energy, solar energy and geothermal energy are utilized to the greatest extent, the problem of underground cold and heat imbalance is solved, the integration of energy supply and energy storage is realized, the sustainable utilization of geothermal resources is achieved, and four operating modes of cold storage, heat storage, energy supply and hot water supply are realized, truly realizing the integration of supply and storage, and the system is simple and easy to install and maintain; in particular, the rotary buried pipe energy storage assembly 2 effectively solves the problems of the traditional ground source heat pump system's U-shaped pipe with a large number of drilling holes, high cost, and slow heat storage speed.

[0080] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hot and cold dual storage wellbore rotary buried pipe energy supply system, characterized in that: include: Pipeline network (1); A rotating buried pipe energy storage assembly (2) connected to the water inlet and the water outlet of the pipe network (1), respectively, wherein the rotating buried pipe energy storage assembly (2) is used for storing cold or heat; A cold storage component (3) for cold storage circulation, which is in communication with the water inlet and water outlet of the rotary buried tube energy storage component (2), wherein the water outlet of the cold storage component (3) is in communication with the water inlet of the rotary buried tube energy storage component (2), and the water inlet of the cold storage component (3) is in communication with the water outlet of the rotary buried tube energy storage component (2); a heat storage component (4) for heat storage circulation, which is in communication with the water inlet and water outlet of the rotary buried pipe energy storage component (2), the water outlet of the heat storage component (4) being in communication with the water inlet of the rotary buried pipe energy storage component (2), and the water inlet of the heat storage component (4) being in communication with the water outlet of the rotary buried pipe energy storage component (2); An energy supply component (5) connected to the water inlet and the water outlet of the rotary buried pipe energy storage component (2) for performing a heating cycle or a cooling cycle on the user side; and a hot water supply component (6) in communication with the heat storage component (4) for supplying water to users.

2. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 1 is characterized in that: The rotary buried pipe energy storage assembly (2) comprises a wellbore pile (2-1) buried in the inner layer of soil, a double-layer steel cage (2-2) provided inside the wellbore pile (2-1) for support, and a double-layer water pipe (2-3) spirally wound on the double-layer steel cage (2-2) for water circulation.

3. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 2 is characterized in that: The double-layer steel cage (2-2) comprises an outer steel cage (2-2-1) and an inner steel cage (2-2-2) arranged inside the outer steel cage (2-2-1); The double-layer water pipe (2-3) comprises an outer-layer water pipe (2-3-1) spirally wound clockwise on the outer-layer steel cage (2-2-1) and an inner-layer water pipe (2-3-2) spirally wound clockwise on the inner-layer steel cage (2-2-2).

4. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 2 is characterized in that: Also includes: An energy storage component water inlet pipe (2-5) is connected to the water inlet end of the double-layer water pipe (2-3) through a water inlet pipe tee (2-4), and an energy storage component water outlet pipe (2-7) is connected to the water inlet end and the water outlet end of the double-layer water pipe (2-3) through a water outlet pipe tee (2-6).

5. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 4 is characterized in that: The cold storage component (3) includes a cooling tower (3-1); The water outlet of the cooling tower (3-1) is connected to the cooling tower water outlet pipe (3-1-1), and the water inlet of the cooling tower (3-1) is connected to the cooling tower water inlet pipe (3-1-2). The outlet end of the cooling tower water outlet pipe (3-1-1) is connected to the water inlet end of the energy storage component water inlet pipe (2-5) for outputting cold water after spraying and cooling; the water inlet end of the cooling tower water inlet pipe (3-1-2) is connected to the water outlet end of the energy storage component water outlet pipe (2-7) for inputting water whose temperature has been raised by the rotating buried pipe energy storage component (2).

6. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 5 is characterized in that: The cooling tower outlet pipe (3-1-1) is provided with a cold storage component outlet solenoid valve (3-2) for opening and closing the cooling tower outlet pipe (3-1-1) and controlling the opening and closing degree of the flow path in the cooling tower outlet pipe (3-1-1), a first three-way valve (3-3) for connecting to the outlet end of the heat storage component (4), a second three-way valve (3-4) for connecting to the outlet end of the energy supply component (5), and an energy storage component water inlet control valve (3-10) for opening and closing the energy storage component water inlet pipe (2-5) in sequence along the fluid flow direction; The cooling tower water inlet pipe (3-1-2) is provided with an energy storage component water outlet control valve (3-5) for opening and closing the energy storage component water outlet pipe (2-7), a third three-way valve (3-6) for circulating the water inlet end of the energy supply component (5), a fourth three-way valve (3-7) for connecting the water inlet end of the heat storage component (4), a cold storage component water inlet solenoid valve (3-8) for opening and closing the cooling tower water inlet pipe (3-1-2) and controlling the opening and closing degree of the flow path in the cooling tower water inlet pipe (3-1-2), and a cooling tower circulating water pump (3-9) for providing water supply power for the cooling tower (3-1).

7. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 6 is characterized in that: The heat storage component (4) comprises a solar heat collector (4-1) and a heat storage tank (4-2); The water outlet of the solar thermal collector (4-1) is connected to the water inlet of the heat storage tank (4-2) through the collector water outlet pipe (4-1-1), and the water inlet of the solar thermal collector (4-1) is connected to the water outlet of the heat storage tank (4-2) through the collector water inlet pipe (4-1-2); the water outlet of the heat storage tank (4-2) is connected to the first tee (3-3) through the heat storage tank water outlet pipe (4-2-1) for flowing high-temperature water into the rotary buried pipe energy storage assembly (2) for storage; the water inlet of the heat storage tank (4-2) is connected to the fourth tee (3-7) through the heat storage tank water inlet pipe (4-2-2) for inputting low-temperature water from the rotary buried pipe energy storage assembly (2).

8. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 7 is characterized in that: A fifth three-way valve (4-3) for connecting to the water inlet of the hot water supply assembly (6) and a heat storage assembly water outlet solenoid valve (4-4) for opening and closing the hot water storage tank outlet pipe (4-2-1) and controlling the opening degree of the flow path in the hot water storage tank outlet pipe (4-2-1) are sequentially arranged on the water outlet pipe (4-2-1) along the fluid flow direction. A heat storage component water inlet control valve (4-5) for opening and closing the heat storage tank water inlet pipe (4-2-2), a sixth three-way valve (4-6) for connecting to the water outlet of the hot water supply component (6), and a heat storage component circulating water pump (4-7) for providing water supply power to the heat storage tank (4-2) are sequentially arranged on the water inlet pipe (4-2-2) along the fluid flow direction. The collector outlet pipe (4-1-1) is provided with a collector outlet control valve (4-8) for opening and closing the collector outlet pipe (4-1-1), and the collector inlet pipe (4-1-2) is provided with a collector inlet control valve (4-9) for opening and closing the collector inlet pipe (4-1-2).

9. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 1 is characterized in that: The energy supply component (5) includes a ground source heat pump (5-1) and a user side (5-2); The underground side of the ground source heat pump (5-1) is connected to the rotating buried pipe energy storage assembly (2) via a ground source heat pump water inlet pipe (5-1-1) and a ground source heat pump water outlet pipe (5-1-2); the air conditioning side of the ground source heat pump (5-1) is connected to the user side (5-2) via an energy supply module water supply pipe (5-2-2) and an energy supply module return pipe (5-2-1).

10. The hot and cold dual storage wellbore rotary buried pipe energy supply system according to claim 8, characterized in that: The hot water supply assembly (6) includes a plate heat exchanger (6-1); The first water inlet end of the plate heat exchanger (6-1) is connected to the fifth tee (4-3) via the first heat exchanger water inlet pipe (6-1-1) for inputting high-temperature water in the heat storage tank (4-2); the second water inlet end of the plate heat exchanger (6-1) is connected to the second heat exchanger water inlet pipe (6-1-2) for inputting low-temperature water for heat exchange; The first water outlet end of the plate heat exchanger (6-1) is connected to the sixth tee (4-6) via the first plate heat exchanger water outlet pipe (6-1-3) for circulating low-temperature water in the plate heat exchanger (6-1) to the hot water storage tank (4-2) for reheating; the second water outlet end of the plate heat exchanger (6-1) is connected to the second heat exchanger water outlet pipe (6-1-4) for supplying high-temperature water to users.

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