Multi-energy coupling supply and storage system capable of storing heat across seasons and time

Abstract

The utility model relates to the field of clean energy supply technology research, in particular to a multi-energy coupling supply and storage system capable of storing heat across seasons and time, which comprises a pipe network, a solar module, a geothermal energy module, a user side and an air energy module. Compared with the system in the prior art, the system provided by the utility model can integrate a plurality of renewable energy sources, complementarily utilize the renewable energy sources at different time and under different conditions, and improve the overall stability. Meanwhile, solar energy is utilized for heat storage in the non-energy-supply period and the energy-supply period and the non-energy-supply period, the problem of underground cold accumulation is solved, and energy supply and energy storage integration is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to multi -energy coupling technical field relates to the underground energy storage and ground energy supply technology research field, concretely is a kind of multi-energy coupling supply and storage system of cross-season cross-time heat storage. BACKGROUND

[0002] Single renewable energy supply form such as solar energy, geothermal energy, air energy is susceptible to environmental factors, there is volatility, indirectness, cannot realize long-term stable and continuous energy supply.For example, solar energy cannot obtain enough energy to continuously supply energy on cloudy days or at night, geothermal heat pump system is prone to cause soil cold and hot accumulation to reduce energy extraction efficiency when long-term operation, air source heat pump unit is prone to start-up and shutdown difficulty when low-temperature operation.

[0003] Multi-energy complementary demand increases, and energy system is experiencing deep changes from single energy supply to multi-energy complementarity.Multi-energy coupling system can realize the coordinated mutual aid of multiple energies by utilizing the mutual coupling and conversion characteristics between energies, and improve the utilization efficiency of overall energy system.But the existing technology mainly focuses on the improvement of single link, lacks multi-energy coupling overall system optimization;In addition, the separation of energy supply system and energy storage device leads to poor synergy, causing energy loss.

[0004] To solve the above problems of large fluctuation of single renewable energy supply such as solar energy, geothermal energy, air energy, and overloading of underground heat extraction in cold or severe cold regions, the utility model provides a multi-energy coupling supply and storage system of cross-season cross-time heat storage. UTILITY MODEL CONTENTS

[0005] The utility model provides a multi-energy coupling supply and storage system of cross-season cross-time heat storage based on the problems in the prior art.

[0006] The utility model provides a multi-energy coupling supply and storage system of cross-season cross-time heat storage, comprising:

[0007] Pipe network;

[0008] Solar module for heat supply and heat storage in communication with the water inlet end and the water outlet end of the pipe network respectively, the solar module includes solar collector for collecting solar energy and heating water;

[0009] Geothermal energy module for heat supply cycle and cooling cycle on user side in communication with the water inlet end and the water outlet end of the solar module, the geothermal energy module includes ground source heat pump unit for energy conversion and temperature regulation;

[0010] User side in communication with the water inlet end and the water outlet end of the solar module and geothermal energy module, the user side includes water supply main pipe for supplying water for users and return water main pipe for returning water for users;

[0011] and an air energy module for heating cycle or cooling cycle in communication with the water inlet end and the water outlet end of the user side, the air energy module comprising an air source heat pump unit.

[0012] On the basis of the above scheme, the solar collector, the ground source heat pump unit and the air source heat pump unit are used for combined heating in the heating period.

[0013] The ground source heat pump unit and the air source heat pump unit are used for combined cooling in the cooling period.

[0014] The solar module is used for soil heat storage in the non-energy supply period and the non-energy supply period of the energy supply period.

[0015] On the basis of the above scheme, the solar module further comprises:

[0016] A first heat exchanger connected with the solar collector through the solar collector outlet pipe and the solar collector inlet pipe, for indirectly transferring the heat of the solar collector to the return water in the open water tank.

[0017] An open water tank connected with the first heat exchanger through the first water inlet pipe and the first heat exchanger outlet pipe and the first water outlet pipe and the first heat exchanger inlet pipe, for storing hot water, balancing temperature fluctuation and providing buffer.

[0018] And a second heat exchanger connected with the open water tank through the second water outlet pipe and the second water inlet pipe, for transferring the heat in the open water tank to the return water of the user side.

[0019] On the basis of the above scheme, the solar module further comprises: a first three-way valve connected between the first heat exchanger outlet pipe and the open water tank first water inlet pipe, for connecting with the water outlet end of the geothermal energy module, and a fourth three-way valve arranged on the open water tank first water outlet pipe, for connecting with the water inlet end of the geothermal energy module.

[0020] On the basis of the above scheme, the geothermal energy module further comprises:

[0021] A water distributor connected with the water outlet end of the ground source heat pump unit, for distributing and controlling the water flow direction.

[0022] And a water collector connected with the water inlet end of the ground source heat pump unit, for collecting the return water and transporting to the underground circulation.

[0023] On the basis of the above scheme, further comprising: a geothermal energy module water supply pipe arranged on the water outlet end of the ground source heat pump unit and a geothermal energy module return water pipe arranged on the water inlet end of the ground source heat pump unit.

[0024] On the basis of the above-mentioned scheme, the water outlet end of the ground source heat pump unit is communicated with the water inlet end of the ground source heat pump unit along the fluid flow direction through the water distributor fourth water inlet pipe and the water distributor water inlet main pipe.

[0025] On the basis of the above-mentioned scheme, the water outlet end of the water collector is communicated with the water inlet end of the ground source heat pump unit along the fluid flow direction through the water collector water outlet main pipe and the water collector first water outlet pipe;

[0026] A sixth water pump for driving the circulating water flow between the water collector and the ground source heat pump unit is arranged on the water collector first water outlet pipe, wherein the water collector collects the backwater of the ground heat exchanger through the water collector water inlet main pipe.

[0027] On the basis of the above-mentioned scheme, the air energy module further comprises:

[0028] An air energy module water supply pipe communicated with the water inlet end of the pipe network;

[0029] And an air energy module backwater pipe communicated with the water outlet end of the pipe network.

[0030] Compared with the prior art system, the utility model makes the most of solar energy, geothermal energy and air energy, solves the problems of large fluctuation of single renewable energy supply, intermittent start and stop of equipment, realizes coordinated mutual aid of multiple energy, reduces the dependence on standby energy, improves the utilization efficiency of the overall energy system, realizes stable and continuous energy supply, combines the energy supply system and the energy storage device, enhances the synergy, and avoids energy loss. In addition, the utility model is modularized, can be flexibly configured according to local resource endowment, is especially suitable for areas with sufficient light, cold or severe cold; on the basis of realizing heat supply and cold supply, the utility model utilizes solar energy to store heat in soil across seasons and time during the non-energy supply period and the non-energy supply period of the energy supply period, solves the problems of underground heat overload and low operation efficiency of the ground source heat pump unit in cold or severe cold areas, realizes sustainable utilization of geothermal resources, realizes time storage, can fastest speed replenish soil heat loss caused by energy supply, speeds up soil temperature recovery, and makes up the temperature attenuation of cross-season heat storage. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structure schematic view of the multi-energy coupling supply and storage system of the utility model cross season and time heat storage;

[0032] Figure 2 It is a heat supply and cold supply mode schematic view of the multi-energy coupling supply and storage system of the utility model cross season and time heat storage;

[0033] Figure 3 It is a heat storage mode schematic view of the multi-energy coupling supply and storage system of the utility model cross season and time heat storage. DETAILED DESCRIPTION

[0034] The utility model will be described in further detail below in combination with the drawings and examples. It should be pointed out that the following examples are intended to facilitate the understanding of the utility model and do not limit it in any way.

[0035] As shown in Figure 1 The utility model provides a kind of multi-energy coupling supply and storage system of cross-season and cross-time heat storage, comprising:

[0036] Pipe network;

[0037] Solar module for heat supply and heat storage, which is communicated with the water inlet end and the water outlet end of pipe network respectively;

[0038] Geothermal energy module for heat supply cycle and cooling cycle for user side, which is communicated with the water inlet end and the water outlet end of solar module;

[0039] User side, which is communicated with the water inlet end and the water outlet end of solar module and geothermal energy module;

[0040] And air energy module for heat supply cycle or cooling cycle, which is communicated with the water inlet end and the water outlet end of user side.

[0041] The above system of the utility model, including solar module, geothermal energy module and air energy module, has two modes of heat supply and heat storage: in winter (heating period) solar collector, ground source heat pump unit and air source heat pump unit are used to jointly heat, in summer (cooling period) ground source heat pump unit and air source heat pump unit are used to jointly cool, and in non-energy supply period and non-energy supply time period, soil heat storage is carried out using solar energy.

[0042] The working principle of the heat supply and cooling mode of the multi-energy coupling supply and storage system of cross-season and cross-time heat storage is as follows: in winter, solar energy, geothermal energy and air energy are used to jointly heat, and the heat source form can be switched according to the end load demand; solar collector collects heat to raise the water temperature of water tank, ground source heat pump unit extracts underground heat, and air source heat pump unit extracts heat in air to supply end users in the form of hot water. In summer, geothermal energy and air energy are used to jointly cool, and the cold source form can be switched according to the end load demand; ground source heat pump unit extracts underground cold, and air source heat pump unit extracts cold in air to supply end users in the form of cold water.

[0043] As a specific embodiment, the user side includes water supply main pipe 22 for supplying water to users and backwater main pipe 26 for returning water to users;Wherein, first water pump 23 and water supply control valve 24 are sequentially arranged on the water supply main pipe 22 along the fluid flow direction;Backwater control valve 25 is arranged on the backwater main pipe 26.

[0044] As shown in Figure 2 As a specific embodiment, the solar module comprises:

[0045] a solar collector 1 for collecting solar energy and heating water;

[0046] a first heat exchanger 2 connected with the solar collector 1 through the solar collector outlet pipe 10 and the solar collector inlet pipe 40 for indirectly transferring the heat of the solar collector 1 to the return water in the open-type water tank 3; wherein the first heat exchanger 2 is connected with the first heat exchanger outlet pipe 11 at the water outlet side close to the open-type water tank 3, and the first heat exchanger 2 is connected with the first heat exchanger inlet pipe 38 at the water inlet side close to the open-type water tank 3;

[0047] an open-type water tank 3 connected with the first heat exchanger outlet pipe 11 through the open-type water tank first inlet pipe 13 and connected with the first heat exchanger inlet pipe 38 through the open-type water tank first outlet pipe 35 for storing hot water, balancing temperature fluctuations and providing buffering;

[0048] and a second heat exchanger 4 connected with the open-type water tank 3 through the open-type water tank second outlet pipe 16 and the open-type water tank second inlet pipe 33 for transferring the heat in the open-type water tank 3 to the user-side return water; wherein the outlet end of the second heat exchanger 4 is provided with the second heat exchanger outlet pipe 17, the second heat exchanger outlet pipe 17 is communicated with the water inlet side of the user side through the solar module water supply pipe 20 for water supply, and the water return side of the user side is communicated with the water inlet side of the second heat exchanger 4 through the solar module return water pipe 28 and the second heat exchanger inlet pipe 31 in turn for water return. Wherein, the second water pump 29 is arranged on the second heat exchanger inlet pipe 31.

[0049] As shown in Figure 2 The solar module further comprises: a solar collector outlet valve 9 arranged on the solar collector outlet pipe 10 for opening and closing the solar collector 1; a fifth water pump 39 and a solar collector inlet valve 41 arranged on the solar collector inlet pipe 40 in turn along the fluid flow direction for driving the circulating water flow of the solar collector 1 and for controlling the start and stop of the solar collector 1; wherein the solar collector outlet valve 9 and the solar collector inlet valve 41 cooperate to jointly control the complete passage of the collector circulation (the outlet valve 9 is open, the inlet valve 41 is open → circulating operation; both are closed → circulating stop), and also link with other valves (such as the return water control valve 25, the water supply control valve 24, etc.) of the system to ensure that the water flow flows along the designed path.

[0050] A fourth water pump 37 arranged on the first heat exchanger inlet pipe 38 for driving the circulating water flow between the first heat exchanger 2 and the open-type water tank 3;

[0051] A water outlet control valve 15 for controlling the opening and closing of the open water tank 3 is arranged on the second water outlet pipe 16 of the open water tank.

[0052] A third water pump 32 for driving the circulation of water between the second heat exchanger 4 and the open water tank 3 and an open water tank water inlet control valve 34 for controlling the opening and closing of the open water tank 3 are arranged in sequence along the fluid flow direction on the second water inlet pipe 33 of the open water tank.

[0053] In order to connect the solar module with the geothermal energy module, a first tee joint 12 for connecting with the water outlet end of the geothermal energy module is connected between the first heat exchanger water outlet pipe 11 and the open water tank first water inlet pipe 13, and a fourth tee joint 36 for connecting with the water inlet end of the geothermal energy module is arranged on the open water tank first water outlet pipe 35.

[0054] The above-mentioned solar module heating use method: open the solar collector water outlet valve 9, the first tee joint 12AB, the open water tank water outlet control valve 15, the second tee joint 18AB, the first four-way valve 21AC, the first water pump 23, the water supply control valve 24, the water return control valve 25, the second four-way valve 27AC, the second water pump 29, the third tee joint 30AB, the third water pump 32, the open water tank water inlet control valve 34, the fourth tee joint 36AB, the fourth water pump 37, the fifth water pump 39, the solar collector water inlet valve 41, and the remaining valves, tee joints and water pumps are in closed state. In winter daytime, the solar collector 1 collects heat, which is transported to the first heat exchanger 2 through the solar collector water outlet pipe 10, indirectly exchanges heat with the return water from the open water tank 3, and the water with reduced temperature after heat exchange returns to the solar collector 1 through the solar collector water inlet pipe 40 to circulate and collect heat; the return water from the open water tank 3 absorbs heat in the first heat exchanger 2, and after being heated, enters the open water tank 3 through the first heat exchanger water outlet pipe 11 and the open water tank first water inlet pipe 13 to realize the temperature rise of the water tank; the hot water of the open water tank 3 is transported to the second heat exchanger 4 through the open water tank second water outlet pipe 16, exchanges heat with the return water from the user side end, and returns to the open water tank 3; the return water from the user side end enters the second heat exchanger 4 in sequence through the return water main pipe 26, the solar module return water pipe 28 and the second heat exchanger water inlet pipe 31, exchanges heat with the hot water from the open water tank 3 in the second heat exchanger 4, and is heated, and then enters the end in sequence through the second heat exchanger water outlet pipe 17, the solar module water supply pipe 20 and the water supply main pipe 22 to supply heat to the end.

[0055] As a specific embodiment, the geothermal energy module comprises: a ground source heat pump unit 8 for energy conversion and temperature regulation, a water distributor 6 connected with the water outlet end of the ground source heat pump unit 8 for distributing and controlling the direction of water flow, and a water collector 7 connected with the water inlet end of the ground source heat pump unit 8 for collecting return water and transporting it to the underground circulation.

[0056] Specifically, the water outlet end of the ground source heat pump unit 8 is communicated with the water distributor 6 along the fluid flow direction through the water distributor fourth water inlet pipe 47 and the water distributor water inlet main pipe 45, wherein the water distributor 6 supplies water to the ground buried pipe through the water distributor water outlet main pipe 46;

[0057] The water outlet end of the water collector 7 is communicated with the water inlet end of the ground source heat pump unit 8 along the fluid flow direction through the water collector water outlet main pipe 51 and the water collector first water outlet pipe 49; the sixth water pump 48 for driving the circulation of water flow between the water collector 7 and the ground source heat pump unit 8 is arranged on the water collector first water outlet pipe 49, wherein the water collector 7 collects the backwater of the ground buried pipe through the water collector water inlet main pipe 52.

[0058] In order to meet the communication between the geothermal energy module and the air energy module, the geothermal energy module water supply pipe 59 is arranged on the water outlet end of the ground source heat pump unit 8 and the geothermal energy module backwater pipe 60 is arranged on the water inlet end; wherein the ground source heat pump unit water outlet control valve 58 for opening and closing the water outlet of the ground source heat pump unit 8 is arranged on the geothermal energy module water supply pipe 59, the ground source heat pump unit water inlet control valve 61 for opening and closing the water inlet of the ground source heat pump unit 8 and the eighth water pump 62 for driving the circulation between the air energy module and the ground source heat pump unit 8 are arranged on the geothermal energy module backwater pipe 60 along the fluid flow direction.

[0059] As Figure 2As shown, the above-mentioned method for heating and cooling using the geothermal energy module: open the first four-way valve 21DC, the first water pump 23, the water supply control valve 24, the return water control valve 25, the second four-way valve 27CD, the sixth three-way valve 44BC, the sixth water pump 48, the seventh three-way valve 50AC, the ground source heat pump unit water outlet control valve 58, the ground source heat pump unit water inlet control valve 61, the eighth water pump 62, and the remaining valves, three-way valves and water pumps are in closed state. In winter, the ground source heat pump unit 8 extracts underground heat through the water collector 7, the water collector outlet pipe 51, and the first water collector outlet pipe 49, and further warms up in the ground source heat pump unit 8. The water reaching the supply temperature after warming up is supplied to the end user through the geothermal energy module water supply pipe 59 and the water supply main pipe 22. The return water from the end user returns to the ground source heat pump unit 8 through the return water main pipe 26 and the geothermal energy module return water pipe 60, and then returns to the ground through the water distributor fourth inlet pipe 47, the water distributor inlet pipe 45, and the water distributor 6. The heating cycle is completed. In summer, the ground source heat pump unit 8 extracts underground cold energy through the water collector 7, the water collector outlet pipe 51, and the first water collector outlet pipe 49, and further cools down in the ground source heat pump unit 8. The water reaching the supply temperature after cooling down is supplied to the user side through the geothermal energy module water supply pipe 59 and the water supply main pipe 22. The return water from the user side returns to the ground source heat pump unit 8 through the return water main pipe 26 and the geothermal energy module return water pipe 60, and then returns to the ground through the water distributor fourth inlet pipe 47, the water distributor inlet pipe 45, and the water distributor 6. The cooling cycle is completed.

[0060] As a specific embodiment, the air energy module includes: an air source heat pump unit 5, an air energy module water supply pipe 63 in communication with the geothermal energy module water supply pipe 59, and an air energy module return water pipe 65 in communication with the geothermal energy module return water pipe 60. The air source heat pump unit 5 absorbs air heat in winter and releases heat to the air in summer, and realizes energy transmission to the end through the air energy module water supply pipe 63 and the air energy module return water pipe 65. The air energy module return water pipe 65 is provided with a ninth water pump 64.

[0061] As Figure 2As shown, the above-mentioned air energy module heating and cooling method: open the first four-way 21BC to, the first water pump 23, water supply control valve 24, return water control valve 25, the second four-way 27BC to, the ninth water pump 64, the rest of the valve, three-way and water pump are closed state. In winter, the air source heat pump unit 5 absorbs air heat supply, hot water through air energy module water supply pipe 63 and water supply main pipe 22 to supply user side, the return water from the user side through the return water main pipe 26 and air energy module return water pipe 65 returns to the air source heat pump unit 5, completes the heating cycle. In summer, the air source heat pump unit 5 absorbs air cooling, cold water through air energy module water supply pipe 63 and water supply main pipe 22 to supply user side, the return water from the user side through the return water main pipe 26 and air energy module return water pipe 65 returns to the air source heat pump unit 5, completes the cooling cycle.

[0062] In order to utilize solar energy storage in non-energy supply period and non-energy supply period of energy supply period, solve the problem of underground cold accumulation, first, through the first heat exchanger 2 for heat storage, also includes: the first water distributor first water inlet pipe 14 and the third water distributor third water inlet pipe 43 are arranged between the first three-way valve 12 and the water distributor 6 along the fluid flow direction; The second water collector second water outlet pipe 54 and the third water collector third water outlet pipe 56 are arranged between the water collector 7 and the fourth three-way valve 36 along the fluid flow direction; Wherein, the seventh water pump 53 is arranged on the water collector second water outlet pipe 54;

[0063] Secondly, the second heat exchanger 4 is used for heat storage, further comprising: the second heat exchanger outlet pipe 17 and the third water distributor third water inlet pipe 43 are communicated through the second water distributor second water inlet pipe 19 and the fifth three-way valve 42 for conveying the hot water output by the second heat exchanger 4 to the water distributor 6;

[0064] And the second heat exchanger second water outlet pipe 54 and the second heat exchanger inlet pipe 31 are communicated through the eighth three-way valve 55 and the fourth water collector fourth water outlet pipe 57 for conveying the return water of the water collector 7 to the second heat exchanger 4.

[0065] In addition to the above-mentioned three-way, the system also includes: for connecting the second heat exchanger outlet pipe 17 and solar module water supply pipe 20 of the second three-way 18; for connecting the solar module water supply pipe 20, geothermal energy module water supply pipe 59, air energy module water supply pipe 63 and water supply main pipe 22 of the first four-way 21; for connecting the return water main pipe 26 and air energy module return water pipe 65, geothermal energy module return water pipe 60, solar module return water pipe 28 of the second four-way 27; for connecting the solar module return water pipe 28, the fourth outlet pipe 57 of the water collector and the inlet pipe 31 of the second heat exchanger of the third three-way 30; for connecting the first inlet pipe 14 of the water distributor, the second inlet pipe 19 of the water distributor and the third inlet pipe 43 of the water distributor of the fifth three-way 42; for connecting the third inlet pipe 43 of the water distributor, the inlet main pipe 45 of the water distributor and the fourth inlet pipe 47 of the water distributor of the sixth three-way 44; and for connecting the first outlet pipe 49 of the water collector, the second outlet pipe 54 of the water collector and the outlet main pipe 51 of the water collector of the seventh three-way 50.

[0066] As shown in Figure 3 A multi-energy coupling supply and storage system based on geothermal and solar cross-season and cross-time heat storage is used for soil heat storage by solar energy. The heat storage mode uses the following method:

[0067] During the day in the non-energy supply period and the non-energy supply period in the energy supply period: open the solar collector outlet valve 9, the first three-way 12AC, the open water tank outlet control valve 15, the fourth three-way 36CB, the fourth water pump 37, the fifth water pump 39, the solar collector inlet valve 41, the fifth three-way 42AB, the sixth three-way 44AC, the seventh three-way 50CB, the seventh water pump 53, the eighth three-way 55AB, and the rest of the valves, three-ways, four-ways and water pumps are in closed state.

[0068] The solar collector 1 collects heat during the day, and after the water in the open water tank 3 is heated to the set temperature, it passes through the first three-way 12AC, the first inlet pipe 14 of the water distributor, the fifth three-way 42AB, the third inlet pipe 43 of the water distributor, the sixth three-way 44AC, the inlet main pipe 45 of the water distributor, enters the water distributor 6 to deliver heat to the ground, and the return water passes through the water collector 7, respectively through the outlet main pipe 51 of the water collector, the seventh three-way 50CB, the second outlet pipe 54 of the water collector, the eighth three-way 55AB, the third outlet pipe 56 of the water collector, the fourth three-way 36CB, the inlet pipe 38 of the first heat exchanger, enters the first heat exchanger 2 to exchange heat with the hot water from the solar collector outlet pipe 10, completes the cycle and realizes heat storage.

[0069] Non-energy supply period and energy supply period non-energy supply time night heat storage: open water tank outlet control valve 15, second three-way 18AC to, third three-way 30AC to, third water pump 32, open water tank inlet control valve 34, fifth three-way 42CB to, sixth three-way 44AC to, seventh three-way 50CB to, seventh water pump 53, eighth three-way 55AC to, the rest of the valve, three-way, four-way and water pump are closed state.

[0070] Night heat stored in open water tank 3 is used to store heat in the ground, and the hot water in open water tank 3 exchanges heat with the return water from the underground heat storage in second heat exchanger 4. After heat exchange, the water with increased temperature passes through second heat exchanger outlet pipe 17, second three-way 18AC to, water distributor second inlet pipe 19, fifth three-way 42CB to, water distributor third inlet pipe 43, sixth three-way 44AC to, water distributor inlet main pipe 45, enters water distributor 6 to deliver heat to the ground, and the return water passes through water collector 7, respectively through water collector outlet main pipe 51, seventh three-way 50CB to, water collector second outlet pipe 54, eighth three-way 55AC to, water collector fourth outlet pipe 57, third three-way 30AC to, second heat exchanger inlet pipe 31, enters second heat exchanger 4, and completes the cycle to realize heat storage.

[0071] In this embodiment, the heating and cooling mode of the multi-energy coupling supply and storage system for cross-season and cross-time heat storage can simultaneously realize solar energy, geothermal energy and air energy heating in winter, and can also switch the heating source form according to the terminal load demand; in summer, it can simultaneously realize geothermal energy and air energy cooling, and can also switch the cooling source form according to the terminal load demand.

[0072] In this embodiment, the solar module includes solar collector 1, first heat exchanger 2, open water tank 3 and second heat exchanger 4. Solar collector 1 and first heat exchanger 2 are connected through solar collector outlet pipe 10 and solar collector inlet pipe 40 to realize heat taking cycle, which is a separate circulation loop. Fifth water pump 39 is arranged on solar collector inlet pipe 40. Solar collector outlet valve 9 and solar collector inlet valve 41 are respectively arranged on solar collector outlet pipe 10 and solar collector inlet pipe 40. First heat exchanger 2 and open water tank 3 are connected through first heat exchanger outlet pipe 11, open water tank first inlet pipe 13 and open water tank first outlet pipe 35, first heat exchanger inlet pipe 38 to realize heat exchange cycle, which is a separate circulation loop. Fourth water pump 37 is arranged on first heat exchanger inlet pipe 38. Open water tank 3 and second heat exchanger 4 are connected through open water tank second outlet pipe 16 and open water tank second inlet pipe 33 to realize heat taking cycle, which is a separate circulation loop. Third water pump 32 is arranged on open water tank second inlet pipe 33. Open water tank outlet control valve 15 and open water tank inlet control valve 34 are respectively arranged on open water tank second outlet pipe 16 and open water tank second inlet pipe 33.

[0073] In the embodiment, the geothermal energy module comprises a water distributor 6, a water collector 7 and a ground source heat pump unit 8; the ground source heat pump unit 8 realizes an underground energy taking cycle through the fourth water inlet pipe 47 of the water distributor, the water inlet main pipe 45 of the water distributor, the water outlet main pipe 51 of the water collector and the first water outlet pipe 49 of the water collector, is a separate cycle loop, and the sixth water pump 48 is arranged on the first water outlet pipe 49 of the water collector; the ground source heat pump unit 8 realizes an energy supply cycle through the geothermal energy module water supply pipe 59 and the geothermal energy module water return pipe 60, is a separate cycle loop, the eighth water pump 62 is arranged on the geothermal energy module water return pipe 60, and the ground source heat pump unit water outlet control valve 58 and the ground source heat pump unit water inlet control valve 61 are arranged on the geothermal energy module water supply pipe 59 and the geothermal energy module water return pipe 60 respectively.

[0074] The system can have two modes of heat supply and heat storage, and the heat supply and heat storage mode can realize heat supply in winter and heat supply in summer, and the heat storage mode can realize cross-time and cross-season heat storage. Meanwhile, the utility model is modular design, and is realized by combination of solar module, geothermal energy module and air energy module. Among them, the solar module only supplies heat, and the geothermal energy module and the air energy module can realize heat supply and heat supply, and the system is simple and easy to install and maintain.

[0075] The ground source heat pump unit 8 of the geothermal energy module absorbs the heat of the stratum through the buried pipe heat exchange and the heat transfer medium (water or antifreeze) collected by the water collector 7 in winter, generates hot water to supply heat to the end, and releases the cold to the stratum through the water distributor 6 and the buried pipe; in summer, the heat transfer medium collected by the water collector 7 exchanges heat through the buried pipe heat exchange, takes away the heat of the end and releases the heat to the stratum through the water distributor 6 and the buried pipe.

[0076] The air energy module absorbs air heat in winter and releases heat to the air in summer, and realizes energy transmission to the end through the air energy module water supply pipe and the air energy module water return pipe.

[0077] The solar module, the geothermal energy module and the air energy module make hot / cold water, and the solar module water supply pipe, the geothermal energy module water supply pipe and the air energy module water supply pipe are connected with the water supply main pipe through the first four-way valve and the water supply main pipe, and the water supply main pipe uniformly supplies energy to the end; the water return main pipe is connected with the solar module water supply pipe, the geothermal energy module water supply pipe and the air energy module water supply pipe through the second four-way valve.

[0078] The working principle of the heat storage mode of the multi-energy coupling supply and storage system for cross-season and cross-time heat storage is as follows:

[0079] In the non-energy supply period and the non-energy supply period of the energy supply period, the solar heat collector collects heat, preferentially heats the water in the open water tank, stops heating when the water temperature in the open water tank reaches the set temperature, and delivers heat to the underground through the first water inlet pipe of the water distributor; in the non-energy supply period and the non-energy supply period of the energy supply period, the water stored in the open water tank during the day is used to deliver heat to the underground through the second water inlet pipe of the water distributor. The purpose of heat storage is to solve the problem of underground cold accumulation caused by using a ground source heat pump for heating and to improve the heating efficiency of the ground source heat pump unit during the heating period.

[0080] Using the system and method of the embodiment, a multi-energy coupling supply and storage system for cross-season and cross-time heat storage is proposed, which has a reasonable structure design, integrates various renewable energies, and complements the utilization of different times and conditions to improve the overall stability. At the same time, the use of solar heat storage during the non-energy supply period solves the problem of underground cold accumulation and realizes the integration of energy supply and energy storage.

[0081] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiments with equivalent changes are equivalent to the above embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A multi-energy coupling supply and storage system for cross-season and cross-time heat storage, characterized in that, Comprise: a pipe network; a solar module for heat supply and heat storage, which is connected with the water inlet end and the water outlet end of the pipe network respectively, and comprises a solar collector (1) for collecting solar energy and heating water; a geothermal energy module for heat supply cycle and cold supply cycle on the user side, which is connected with the water inlet end and the water outlet end of the solar module, and comprises a ground source heat pump unit (8) for energy conversion and temperature adjustment; a user side connected with the water inlet end and the water outlet end of the solar module and the geothermal energy module, which comprises a water supply main pipe (22) for supplying water to users and a return water main pipe (26) for returning water from users; and an air energy module for heat supply cycle or cold supply cycle, which is connected with the water inlet end and the water outlet end of the user side, and comprises an air source heat pump unit (5).

2. The multi-energy coupled storage system of claim 1, wherein, During the heating period, the solar collector (1), the ground source heat pump unit (8) and the air source heat pump unit (5) are used for combined heat supply; During the cooling period, the ground source heat pump unit (8) and the air source heat pump unit (5) are used for combined cooling; During the non-energy supply period and the non-energy supply period of the energy supply period, the solar module is used for soil heat storage.

3. The multi-energy coupling supply and storage system of cross-season and cross-time heat storage according to claim 1, characterized in that, The solar module further comprises: a first heat exchanger (2) connected with the solar collector (1) through a solar collector outlet pipe (10) and a solar collector inlet pipe (40), which is used for indirectly transferring the heat of the solar collector (1) to the return water in the open water tank (3); an open water tank (3) connected with the first heat exchanger outlet pipe (11) through an open water tank first inlet pipe (13) and the first heat exchanger inlet pipe (38) through an open water tank first outlet pipe (35), which is used for storing hot water, balancing temperature fluctuations and providing buffering; and a second heat exchanger (4) connected with the open water tank (3) through an open water tank second outlet pipe (16) and an open water tank second inlet pipe (33), which is used for transferring the heat in the open water tank (3) to the return water of the user side.

4. The multi-energy coupling supply and storage system of cross-season and cross-time heat storage according to claim 3, characterized in that, The solar module further comprises: a first three-way valve (12) connected between the first heat exchanger outlet pipe (11) and the open water tank first inlet pipe (13) for connecting with the water outlet end of the geothermal energy module, and a fourth three-way valve (36) provided on the open water tank first outlet pipe (35) for connecting with the water inlet end of the geothermal energy module.

5. The multi-energy coupled storage and supply system of claim 1, wherein, The geothermal energy module further comprises: a water distributor (6) connected with the water outlet end of the ground source heat pump unit (8) for distributing and controlling the direction of water flow; and a water collector (7) connected with the water inlet end of the ground source heat pump unit (8) for collecting return water and delivering it to the underground circulation.

6. The multi-energy coupling supply and storage system of cross-season and cross-time heat storage according to claim 5, characterized in that, Further comprising: a geothermal energy module water supply pipe (59) provided on the water outlet end of the ground source heat pump unit (8) and a geothermal energy module return water pipe (60) provided on the water inlet end of the ground source heat pump unit (8).

7. The multi-energy coupling supply and storage system of cross-season and cross-time heat storage according to claim 5, characterized in that, The water outlet end of the ground source heat pump unit (8) is communicated with the water distributor (6) along the fluid flow direction through a water distributor fourth inlet pipe (47) and a water distributor inlet main pipe (45), wherein the water distributor (6) supplies water to the buried pipe through a water distributor outlet main pipe (46).

8. The multi-energy coupling supply and storage system of cross-season and cross-time heat storage according to claim 7, characterized in that, The water outlet end of the water collector (7) is communicated with the water inlet end of the ground source heat pump unit (8) along the fluid flow direction through a water collector water outlet main pipe (51) and a water collector first water outlet pipe (49); A sixth water pump (48) is arranged on the water collector first water outlet pipe (49) and is used to drive the circulation of water flow between the water collector (7) and the ground source heat pump unit (8), wherein the water collector (7) collects the return water of the ground heat exchanger through a water collector water inlet main pipe (52).

9. The multi-energy coupled storage and supply system of claim 1, wherein, The air energy module further comprises: An air energy module water supply pipe (63) which is communicated with the water inlet end of the pipe network; And an air energy module return water pipe (65) which is communicated with the water outlet end of the pipe network.

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