33 results about "Ground heat exchanger" patented technology

The invention relates to a distributed cross-seasonal heat storage type ground source heat pump heating air-conditioning system group and a regulation and control method. The distributed cross-seasonal heat storage type ground source heat pump heating air-conditioning system group is composed of a plurality of distributed heating air-conditioning systems. Each distributed heating air-conditioning system is close to the served building and is provided with an independent ground heat exchanger, a heat pump, a circulating pump, a connecting pipeline, a heating air-conditioning user and an outdoor air heat exchanger; a plurality of distributed heating air-conditioning systems form a heating air-conditioning system group; the distributed heating air-conditioning systems in the group are subjected to centralized and unified power distribution, all the distributed heating air-conditioning systems are interconnected through a wireless communication network, operation data of all the distributed heating air-conditioning systems are shared, and centralized cooperative regulation and operation management are carried out. In spring and autumn, surplus wind, light and electric power are utilized to store heat or cold underground through a heat pump and a ground heat exchanger; in summer, the heat pump is used for air-conditioning refrigeration, and heat is discharged to the underground or air; in winter, heat of soil or air is extracted through the ground source heat pump to supply heat to a room.

The invention discloses a buried pipe temperature response calculation method considering underground water seepage and ground temperature gradient, and belongs to the field of building environment and energy application engineering.The buried pipe temperature response calculation method comprises the steps that a shallow buried pipe heat exchanger is regarded as a finite long-line heat source model, and when underground water seepage passes, the shallow buried pipe heat exchanger is regarded as a finite long-line heat source seepage model; an energy control equation containing a soil heat conduction item, an underground water seepage convection item and a ground temperature gradient correlation item at the same time is established, and initial temperature distribution based on ground temperature gradient, ground surface fixed wall temperature and boundary conditions of an underground limited boundary are set; and finally, obtaining an analytical solution expression of the change of the temperature at any position of the underground soil along with the time through analytical solution. According to the method, the defect that a traditional model ignores key environmental factors is overcome, the heat transfer process of heat conduction and convection coupling can be accurately simulated, the accuracy of temperature field prediction and the reliability of long-term performance evaluation are remarkably improved, meanwhile, the complexity of numerical calculation is avoided, and the calculation efficiency is improved.

The utility model belongs to the technical field of tubular heat exchanger equipment, and particularly relates to a shallow sleeve type ground heat exchanger which comprises a straight pipe assembly, a U-shaped pipe assembly and a flange plate assembly, and the straight pipe assembly and the U-shaped pipe assembly are connected in a sealed mode through the flange plate assembly. The straight pipe assembly comprises an inner straight pipe and an outer straight pipe. The U-shaped pipe assembly comprises an inner U-shaped pipe and an outer U-shaped pipe. The flange assembly comprises a first flange and a second flange. The first flange plate and the second flange plate are detachably connected; two clamping blocks are installed at the side end of the first flange plate, inserting holes are formed in the side ends of the clamping blocks, a first gasket is installed at the bottom of the first flange plate, and a plurality of first through grooves are formed in the first gasket; an inserting groove is formed in the bottom of the second flange plate, a sliding groove is formed in the second flange plate, the inserting groove communicates with the sliding groove, a through hole is formed in the side end of the second flange plate, an inserting assembly is arranged at the position of the through hole, a second gasket is installed at the bottom of the second flange plate, and a plurality of second through grooves are formed in the second gasket.

The present application belongs to the technical field of geothermal energy development and utilization, and relates to a hydrothermal type buried pipe heat exchanger optimization design method based on PINN, comprising: 1, numerical simulation and benchmark data set generation; 2, PINN construction and training: constructing a PINN neural network, converting the mass conservation equation and the energy conservation equation in the pore medium into a partial differential equation residual, and together with the discrete data error generated by the numerical simulation software to form a composite loss function; using the nonlinear fitting capability of the PINN neural network, and embedding the physical partial differential equation of fluid flow and heat transfer in the pore medium into the loss function as a soft constraint; 3, data-driven optimization based on the proxy model; the present application not only fundamentally solves the problems of poor generalization ability and easy non-physical interpretation of traditional pure data-driven models, but also breaks through the bottleneck of convergence difficulty and high training cost when solving complex engineering problems by pure PINN.

The present invention relates to a thermal management system and energy storage station for a sodium-electric energy storage device. The thermal management system includes: an above-ground heat exchanger disposed within the sodium-electric energy storage device; an above-ground temperature sensor disposed within the sodium-electric energy storage device; multiple underground heat exchangers that can be dispersedly buried underground at the site where the sodium-electric energy storage device is located; multiple underground temperature sensors that can be buried underground and adjacent to the multiple underground heat exchangers; a control pipeline that connects the above-ground heat exchanger and each underground heat exchanger and includes a control valve group and a drive pump; and a control unit that is electrically connected to the control valve group, the drive pump, the above-ground temperature sensor, and each underground temperature sensor. The thermal management system can effectively manage the thermal state of the sodium-electric energy storage device and has the advantages of energy saving, high efficiency, low cost, and compact size, which is conducive to promoting the popularization and application of sodium-electric energy storage devices.

A heat exchanger (20) for a heating network, in particular a cold district heating network or long-distance heating network, with at least one heat transfer surface for transferring heat from a network fluid of the heating network to a building heating fluid of a building heating system of a building (7), in particular a residential building, wherein at least one flow connection (5) for the building heating fluid and at least one return connection (5) for the building heating fluid are provided, is proposed, which is improved compared to the state of the art, in particular reducing the effort and / or increasing the energy efficiency and the economic efficiency and / or realizing new functionalities.This is achieved according to the invention by the heat exchanger (20) being designed as a ground heat exchanger (20), wherein the ground heat exchanger (20) has at least one ground contact surface for the ground and wherein the ground heat exchanger (20) has at least one heat network inlet (21) for receiving a heat network line (1), in particular a heat network pipe (1), of the heat network, wherein the heat network inlet (21) comprises at least the heat transfer surface.

The invention belongs to the field of shallow geothermal resources, particularly provides a shallow geothermal energy multi-field coupling simulation experiment system, and aims to solve the problems that traditional numerical simulation lacks physical authenticity, and field test is high in cost, long in period and uncontrollable. An experiment platform box body integrated with a layered simulation geologic body is constructed, and systems such as groundwater runoff simulation, mesh temperature control, a heat interference source, buried pipe heat exchange and water pumping and filling wells and the like are cooperatively operated; a'heat-water-force 'multi-physical field coupling environment including underground water seepage, ground temperature field distribution and ground source / water source heat pump engineering activities is truly simulated, so that the development process of shallow geothermal energy is accurately simulated.

The invention belongs to the technical field of underground pipe geothermal heating, and relates to an asymmetric arrangement method and design method of a buried pipe group for an underground water seepage field, and the method comprises the following steps: in the flowing direction of underground water, the depth of buried pipes is non-uniformly distributed according to the gradient principle of'shallow upstream and deep downstream '; the horizontal distances between the buried pipes are non-uniformly distributed according to the principle that the upstream is dense and the downstream is sparse; in the three-dimensional space, the adjacent buried pipes are distributed in a stepped mode or a staggered mode through differential arrangement of the depth and the distance, so that the heat affected zones of all the wells are overlapped in a staggered mode in the vertical direction and the horizontal direction. The depth, the horizontal distance and the arrangement form of the buried pipes are differentially adjusted in the seepage direction, so that the heat extraction strength of a pipe group is matched with the heat-carrying recovery capacity of underground water in space, cold accumulation is restrained, and dynamic balance of a regional rock-soil thermal field and long-term efficient and stable operation of a system are achieved.

The present invention is a system for generating electricity using the temperature difference between the surface and underground of a planet in combination with solar energy. Utilizing the temperature difference between the surface and underground of a planet that has the opportunity to be exposed to sunlight, a uniquely structured ground heat exchanger is used on a planet that can be periodically exposed to sunlight to fully utilize its surface and underground heat and cold sources. The system then combines this with an organic Rankine cycle to perform heat-to-work conversion, thereby achieving thermoelectric power generation on the planet. To save costs, the present invention uses a reasonable structural design to enable the heat-to-work conversion system to operate in both forward and reverse directions. To adapt to different usage scenarios, the present invention can flexibly select different working fluids based on the specific temperature conditions of the planet, so that the system's power generation efficiency can always reach the optimal level for the current situation. This type of power generation method can largely get rid of dependence on solar radiation, and can also obtain relatively stable, high-quality electricity in places where sunlight cannot always be irradiated.

The invention discloses a ground source heat pump electric heating power conversion calculation method considering variable flow buried pipe heat exchange characteristics, and belongs to the field of comprehensive energy and electric power system comprehensive dispatching, and the ground source heat pump electric heating power conversion calculation method comprises the steps that 1, a thermal model of a single U-shaped buried pipe under variable flow regulation is established, obtaining a linear relation between the temperature of an outlet and an inlet of the fluid and the temperature of a drill hole wall when the flow of the fluid in the single U-shaped buried pipe changes; 2, the method is popularized to a thermal model of a multi-U-shaped buried pipe system, the linear relation between the outlet and inlet fluid temperatures and the borehole wall temperature when the terminal fluid flow changes is obtained, and the extracted total heat is calculated through the flow of each branch and the temperature difference between the inlet and the outlet; and 3, establishing a variable-flow electric-thermal coupling model of the ground source heat pump to obtain an electric-thermal power conversion relation among the heating power of the ground source heat pump, the temperature of the starting end inlet and the output temperature of the drilling field. According to the invention, the fluid flow is used as a continuous regulation variable, so that the operation flexibility of the ground source heat pump system is improved.

A system and method for in ground heat exchange, including at least one first array and one second array, each first and second array comprising a plurality of capped pipes; at least one temperature sensor; and at least one flow rate sensor, a plurality of flow rate valves connected to each first array and second array, the flow rate valves configured to facilitate flow of a liquid through the system; at least one pump attached to the flow rate valves for modulating the flow rate of the system; and a heat pump, wherein the system is configured to provide heating and cooling to a building.

The application provides a ground source heat exchanger installation structure and a ground source heat exchanger installation method. The ground source heat exchanger installation structure comprises a ground buried pipe heat exchanger, a horizontal connecting pipe and a cantilever beam support. The ground buried pipe heat exchanger is arranged on the outside of a building body. The horizontal connecting pipe is connected with the ground buried pipe heat exchanger and extends horizontally from the outside of the building body. The cantilever beam support is installed horizontally on the outside of the building body. When the horizontal connecting pipe connected with the ground buried pipe heat exchanger extends along the outside of the building body, even if the outside of the building body still needs to be continuously constructed, such as pit backfilling and the like, the horizontal connecting pipe is not easily bent and damaged by the stress of the pit backfilling due to the support of the cantilever beam support on the lower side of the horizontal connecting pipe, the horizontal connecting pipe is effectively protected, the risk of gas collection after the horizontal connecting pipe is connected in an up-down bending manner is reduced, and the stable and efficient operation of the ground source heat exchanger system is ensured.

The invention belongs to the technical field of buried pipe heat exchange, and relates to a PINN-based shallow buried pipe heat exchanger optimization design method, which comprises the following steps of: 1, simulating a high-fidelity numerical value and generating a reference data set; 2, constructing a physical information neural network; 3, verifying the consistency of the training model and the physics; 4, performing multi-target automatic optimization based on the micro agent model; according to the method, the physical mechanism is generated in the data driving model, and the differentiable end-to-end optimization framework is constructed, so that the core defects of physical incredibility, low optimization efficiency, flow splitting and the like of an agent model in the prior art are fundamentally solved, and the crossing from'rapid simulation 'to'reliable optimization' is realized.

The utility model belongs to the technical field of ground source heat pumps, and particularly relates to an automatic temperature control device of a ground source heat pump, which comprises a land and a buried heat exchanger, the buried heat exchanger is buried in the land, the top of the land is provided with a water pump unit, and the output end and the input end of the water pump unit are respectively provided with a first water pipe and a second water pipe. The end, away from the water pump unit, of the first water pipe and the end, away from the water pump unit, of the second water pipe extend into the underground heat exchanger, an inner cavity of the underground heat exchanger is slidably connected with a partition plate, the partition plate divides the inner cavity of the underground heat exchanger into an upper cavity and a lower cavity, and the upper cavity is formed in the upper portion of the lower cavity. The driving mechanism is used for driving the partition to move vertically. According to the utility model, the water distribution in the underground heat exchanger can be dynamically adjusted according to seasonal changes and actual requirements, so that the heat exchange efficiency is improved, the response time is shortened, and the purpose of quickly adjusting the indoor temperature is achieved.

The application provides a heat transfer calculation method, equipment and storage medium for a borehole casing structure ground heat exchanger, and belongs to the ground heat exchanger field, and comprises the following steps: obtaining user load data, heat exchanger system parameters and environmental parameters; setting a time step, establishing a borehole wall heat flux linear function along the depth direction, a borehole wall temperature calculation model and a fluid temperature calculation model; data initialization; in a preset time period, the borehole wall temperature distribution, the fluid temperature distribution and the borehole wall heat flux distribution in the current time step are sequentially calculated repeatedly at the set time step, and then the fluid temperature at the inlet of the ground heat exchanger is calculated according to the user load data. The borehole wall heat flux linear function is introduced, and on this basis, the borehole wall temperature calculation model for directly solving the borehole wall temperature through convolution is established, so that the integral calculation which needs to consume a large amount of calculation resources and a long calculation time is avoided, and the rapid calculation of the system heat transfer process is realized.

The present application relates to the technical field of renewable energy, in particular to a buried pipe, a heat exchange system and a use method of the buried pipe. The buried pipe comprises: a water inlet pipe provided with a water inlet; a water outlet pipe arranged at intervals from the water inlet pipe, and provided with a water outlet; a horizontal pipe structure comprising a shallow horizontal pipe and a deep horizontal pipe, the shallow horizontal pipe and the deep horizontal pipe being respectively communicated with the water inlet pipe and the water outlet pipe; a first opening and closing structure arranged in the water inlet pipe, the height of the first opening and closing structure being lower than the shallow horizontal pipe; and a second opening and closing structure arranged in the shallow horizontal pipe. The present application solves the problems of the geothermal heat exchange system, such as the need for multiple equipment cooperation, large investment and complex structure, thereby providing a buried pipe, a heat exchange system and a use method of the buried pipe.

The invention discloses a ground heat exchanger design method suitable for a geothermal energy storage and utilization system, the geothermal energy storage and utilization system is used for supplying heat and cold to a building and comprises a heat pump unit, a heat source tower and ground heat exchangers, and the ground heat exchangers are respectively arranged in energy storage units of a geothermal energy storage area; the design method of the ground heat exchanger comprises the following steps that S1, the soil average volumetric specific heat capacity CV of the geothermal energy storage area is measured and calculated through a coring method; s2, calculating the total energy storage energy Q storage of the single energy storage unit; and S3, according to the annual cold load Q cold and heat load Q heat of the building, the maximum heat absorption quantity Q heat absorption and the maximum heat release quantity Q heat release of the buried pipe heat exchangers in the geothermal energy storage area are calculated, the number n of energy storage units is calculated, and the number of the buried pipe heat exchangers is determined. According to the method, the relation between the energy storage capacity of the soil and the annual cooling and heating load of the building can be reflected more truly, the number of the buried pipe holes can be reduced, and the construction investment is effectively reduced.

The invention provides a ground cooling system double-fluid coupling temperature field modeling and solving method, which comprises the following steps: constructing a physical model of a double-fluid coupling temperature field suitable for a ground heat exchanger based on a reverse / same-direction heat exchange scene and assumed conditions of high-temperature drilling fluid and low-temperature cooling fluid in a ground cooling system; based on the built inner pipe fluid heat conduction control equation, the built outer pipe fluid heat conduction control equation, the built total heat transfer coefficient calculation equation and the built auxiliary equation, a mathematical model of the double-fluid coupling temperature field is built; according to the physical model and the mathematical model, constructing a double-fluid coupling temperature field model of the ground cooling system; and solving the ground cooling system double-fluid coupling temperature field model through an iterative solution method to obtain a double-fluid temperature field distribution result. The problem that an existing model neglects double-fluid coupling and pipe wall thermal resistance is solved, simulation precision is high, solving is fast, parameter optimization of a ground cooling system can be guided, and safe and efficient deep well drilling is guaranteed.

The invention discloses a buried pipe heat exchanger with a self-heat-storage function, and relates to the technical field of buried pipe heat exchange devices, a heat collection device is used for collecting heat in the environment and exchanging heat with a double-working-medium driving device, and a low-boiling-point working medium in the double-working-medium driving device is vaporized after absorbing heat and enters a liquid accumulation device; the cooling device can cool and liquefy the low-boiling-point working medium flowing out of the liquid accumulation device and enables the liquid-state low-boiling-point working medium to flow back into the double-working-medium driving device, the current-carrying fluid circulation pipe set is buried in underground soil and exchanges heat with the heat supply system, and the double-working-medium driving device communicates with an inlet of the current-carrying fluid circulation pipe set. After a low-boiling-point working medium in the double-working-medium driving device absorbs heat, a current carrying body can enter the current carrying body circulation pipe set and release heat, an outlet of the current carrying body circulation pipe set communicates with the cooling device, and the current carrying body obtained after heat release flows back into the double-working-medium driving device. Heat converted from solar energy or air energy can be autonomously stored in underground soil, and other energy consumption is not needed.

The utility model discloses an energy pipe piece based on circulating medium deformed steel bars, which belongs to the technical field of energy equipment and comprises a reinforcement cage consisting of circulating medium deformed steel bars and solid deformed steel bars, the circulating medium deformed steel bars are communicated with one another to form a medium circulating pipeline, concrete is arranged on the reinforcement cage, the reinforcement cage is positioned in the concrete, and the solid deformed steel bars are arranged in the concrete. And the opening end of the medium circulating deformed steel bar is arranged outside the concrete and is connected with the heat exchange system. According to the energy pipe piece, an original traditional ground heat exchanger and an original traditional capillary heat exchanger are abandoned, original partial solid deformed steel bars are replaced with deformed steel bars where media can circulate, the deformed steel bars with high strength are directly used as heat exchanger pipelines, damage caused by other cross work types in the construction process is avoided, and the energy pipe piece is suitable for large-scale production. The novel energy pipe piece is simple in structure and good in heat conduction capacity, so that the novel energy pipe piece can save extra heat exchanger pipes and initial investment cost, and meanwhile the novel energy pipe piece is simple in overall structure and good in heat conduction performance.

The invention discloses a vertical buried pipe backfill material with a phase change temperature regulation function and a preparation method, and belongs to the technical field of ground source heat pump system engineering materials. The material comprises the following components in percentage by weight: 30-45% of a cement-based cementing material, 10-20% of a multifunctional phase change microcapsule, 25-40% of aggregate, 2-8% of a functional additive and 8-20% of water, the multifunctional phase change microcapsule is composed of a paraffin and CaCl2 particle inner core, a bacillus pasteurii spore middle layer and a temperature-sensitive polymer shell. The temperature fluctuation is stabilized through paraffin phase change, graded repair of cracks is triggered through temperature-sensitive response, and the temperature-sensitive self-repairing material has the characteristics of efficient temperature adjustment, active self-repairing, high stability and excellent comprehensive performance, is simple and controllable in preparation process, is suitable for long-term stable operation of a vertical buried pipe system, and has wide application prospects. The problems that a traditional material is single in temperature adjustment, prone to cracking and ineffective in sealing are effectively solved.

The utility model provides a PVT and energy storage coupled ground source heat pump triple co-generation system which comprises a PV / T photovoltaic photo-thermal plate, a heat storage water tank, a ground source heat pump unit, a ground heat exchanger, an inverter, an indoor energy supply tail end and an energy storage battery. The PV / T photovoltaic photo-thermal plate is communicated with the heat storage water tank through a pipeline to form a first circulation loop; a tap water pipeline on the user side penetrates through the heat storage water tank; one side of the ground source heat pump unit is communicated with the ground heat exchanger through a ground source side circulating water pipeline to form a second circulating loop, and the other side of the ground source heat pump unit is communicated with the indoor energy supply tail end through a user side circulating water pipeline to form a third circulating loop; a second circulating pump B2 is arranged on the second circulating loop; the PV / T photovoltaic photo-thermal plate is electrically connected with the input end of the inverter, and the output end of the inverter is electrically connected with the energy storage battery, the indoor energy supply tail end and the second circulating pump B2. The system provided by the utility model can simultaneously meet various functions of cold supply, heat supply, power supply, domestic hot water and the like.

The invention relates to the technical field of ground source heat pumps, and discloses a heat removal and irrigation dual-mode U-shaped ground heat exchanger and a using method thereof.The heat exchanger comprises an outer pipe, an inner pipe and an adjustable inter-pipe locking mechanism; the outer pipe is U-shaped and is buried underground for heat exchange; a boss is arranged in the outer pipe in an extending mode and used for supporting the inner pipe, and the boss is arranged at a pipe opening of the outer pipe. A multi-stage controllable seepage hole array is arranged on the outer pipe; the inner pipe extends into the outer pipe; the inner pipe is provided with a conducting hole array corresponding to the multi-stage controllable seepage hole array; the adjustable inter-pipe locking mechanism is connected with the inner pipe, and the multi-stage controllable seepage hole array and the through hole array are aligned and conducted or closed in a staggered mode by lifting the inner pipe; and the multi-stage controllable seepage hole array is arranged at a pipe orifice of the outer pipe. The heat exchange and irrigation functions are integrated, an independent irrigation system is omitted, land resource sharing of the underground heat exchange system and the irrigation system is achieved, and the utilization efficiency of the underground space is improved.

The invention relates to a buried pipe heat exchange system design method based on multi-source data fusion and intelligent optimization. The method is suitable for the technical field of buried pipe heat exchange system design. According to the technical scheme, the buried pipe heat exchange system design method based on multi-source data fusion and intelligent optimization comprises the steps that S100, geological survey data and thermal response test data of a target area are obtained; s200, generating a design parameter combination of the buried pipe, and performing numerical model simulation in combination with the geological survey data and the thermal response test data to obtain model simulation data; s300, inputting the model simulation data, the geological survey data and the thermal response test data into the trained machine learning model to obtain a performance analysis result corresponding to the design parameter combination; s400, when the performance analysis result does not meet the preset requirement, returning to the step S200, and generating a new design parameter combination; and when the performance analysis result meets the preset requirement, a design scheme of the buried pipe heat exchange system is obtained.

The invention provides a buried pipe heat exchanger system, and relates to the technical field of energy application, the system comprises a water collector, a buried pipe and a rainwater storage station, the water collector is arranged below a building group; the buried pipes are mounted under open spaces on the two sides of the building group; the buried pipe is communicated with the water collector through a pipeline; the rainwater storage station is communicated with the buried pipe through a pipeline; the rainwater storage station is also vertically communicated with a plurality of rainwater pipelines; rainwater of a building group is collected into the rainwater storage station through the rainwater pipeline, the rainwater storage station temporarily stores the collected rainwater and flows into the buried pipe, the rainwater in the buried pipe exchanges heat with underground soil and then flows back to the water collector, and water in the water collector is conveyed into the buried pipe and exchanges heat with air in a building. According to the buried pipe heat exchanger system, heat transfer between the water supply pipe and the water return pipe of the buried pipe can be effectively reduced while rainwater is utilized, the heat production efficiency is improved, and the production cost is reduced.

The invention discloses a method for constructing a heat transfer model of a buried pipe heat exchanger and determining the hole depth of the buried pipe heat exchanger, and aims to solve the technical problem that the drilling depth of the current buried pipe heat exchanger is unreasonable. According to the technical scheme, based on the heat transfer model of the ground heat exchanger, the interval approximation method is adopted, the better burial depth range is gradually refined, so that the optimal arrangement hole depth within the specific depth range is found, the method is simple and scientific, the accuracy of predicting the performance of the ground heat exchanger can be improved, and then the efficiency and reliability of a ground source heat pump system are improved.

The invention relates to the technical field of buried pipe heat exchange systems, in particular to a buried pipe heat exchanger which comprises a liquid inlet pipe, a liquid outlet pipe, at least three heat exchange pipes and an expansion steel belt. And heat exchange liquid enters from the liquid inlet pipe, flows through the heat exchange pipe, exchanges heat with a rock-soil layer near the ground heat exchanger, and then flows out from the liquid outlet pipe. The expansion steel belt is in an open ring shape and abuts against the inner side of the heat exchange pipe, so that the heat exchange pipe is close to a surrounding rock-soil layer, the distance between heat exchange liquid in the heat exchange pipe and the surrounding rock-soil layer is reduced at the moment, the heat exchange liquid makes direct contact with the stratum and even is pressed into the stratum, and the heat exchange efficiency of the heat exchange liquid and the surrounding rock-soil layer is improved. Wherein the heat exchange pipe comprises straight sections and bent sections, the straight sections can be arranged in the ground drill hole in parallel in the axial direction of the ground drill hole, the bent sections are connected to the two adjacent straight sections, at the moment, the heat exchange pipe is arranged in an S-shaped loopback mode, then the flowing path of heat exchange liquid in the heat exchange pipe is enlarged, and the heat exchange efficiency of the ground heat exchanger is improved.

The invention discloses a solar energy-soil source coupling heat pump system with a self-heat-storage function, and relates to the technical field of coupling heat pump systems, a buried pipe heat exchanger with the self-heat-storage function is used for capturing heat in the environment, and a current-carrying fluid circulation pipe set of the buried pipe heat exchanger with the self-heat-storage function is used for exchanging heat with a heat exchange loop module; the heat exchange loop module is used for providing heat for a user, the carrier fluid circulation pipe set is arranged close to the heat removal pipe set, the heat removal pipe set is used for capturing heat in soil, the heat removal pipe set can communicate with the heat exchange loop module, and the heat removal pipe set is used for exchanging heat with the heat exchange loop module. The double-working-medium driving device of the ground heat exchanger with the self-heat-storage function can communicate with a heat exchange loop module and a user, can directly provide heat for the user, and can exchange heat with the heat exchange loop module. Heat converted from solar energy or air energy can be autonomously stored in underground soil, other energy consumption is not needed, and heat supply is stable.

The invention discloses a photovoltaic photo-thermal coupling terrestrial heat multi-energy utilization system which is mainly composed of a water source heat pump unit, a ground heat exchanger, a PV / T heat collector and an energy storage water tank which are mutually connected through pipelines and connected with an air conditioner cold / hot water inlet pipe, an air conditioner cold / hot water return pipe, a domestic hot water inlet pipe and a domestic hot water return pipe. Accordingly, the inventor further establishes a corresponding control method, and the functions of refrigeration in summer, heating in winter, hot water production, direct cooling, efficient power generation and the like are achieved by controlling opening and closing of the electric adjusting valve arranged on the pipeline. Solar energy, geothermal energy and conventional energy are coupled and are in pairwise complementary gradient utilization, the temperature of the solar cell panel can be reduced, the photoelectric conversion efficiency can be improved, hot water can be generated for heat supply, soil source heat absorption and release balance is ensured, and renewable energy sources are recycled to the maximum extent.