Solar-wind-geothermal multi-energy complementary heating system

Abstract

A multi-energy complementary heating system combining solar, wind, and geothermal energy belongs to the field of energy conservation and environmental protection. The system includes solar collectors, wind turbine blades, a wind-magnetic heater, a medium-deep geothermal heat exchanger, and a heat pump. Its key features are: the system incorporates three heating modes—solar, wind-magnetic, and geothermal—in which solar collectors convert solar energy into heat energy; wind-magnetic heating converts wind energy into mechanical energy via blades, which is then converted into heat energy via the magnetic field in the heater; and geothermal heating utilizes a medium-deep geothermal heat exchanger-heat pump system to convert geothermal energy into heat energy, ultimately transferring the heat to the building through a fluid medium to meet the building's winter heating needs. It boasts advantages such as high energy efficiency, low operating costs, and strong operational stability, making it suitable for HVAC, industrial heating, and other fields.

Description

Technical Field

[0001] This utility model relates to a multi-energy complementary heating system of solar energy, wind energy and geothermal energy, which belongs to the field of energy conservation and environmental protection. Background Technology

[0002] In recent years, building energy consumption has accounted for a significant proportion of my country's total energy consumption. The reliance on coal-fired power plants or boilers for heating has led to a sharp increase in heating load, resulting in an increasingly severe energy situation. Driven by global energy transition and carbon neutrality goals, building an efficient, low-carbon, and stable energy supply system has become a global consensus. Therefore, it is urgent to change energy utilization patterns, improve energy efficiency, ensure clean and efficient energy use, and achieve coordinated development among energy, the economy, and the environment.

[0003] Northwest China boasts a diverse range of energy resources, particularly abundant renewable energy sources such as solar, wind, and geothermal energy, which are readily available. However, due to factors such as an irrational energy structure, outdated utilization methods, and low efficiency, a large amount of these resources are not being used effectively, resulting in serious waste and exacerbating environmental pollution, thus hindering the development of the entire Northwest region. Solar, wind, and geothermal energy, as three of the most promising renewable energy sources, each possess unique advantages and limitations. Multi-energy complementarity can not only overcome the instability of single-energy supply but also achieve cascaded energy utilization, significantly improving the stability, economy, and environmental friendliness of heating systems.

[0004] Currently, domestic and international researchers have conducted extensive research on solar-wind-geothermal multi-energy complementary heating systems, achieving fruitful results. These systems integrate solar collectors, wind turbines, geothermal heat exchangers, heat pumps, and other equipment to convert solar, wind, and geothermal energy into heat. This heat is then transferred to water in a storage tank via a heat exchange medium and circulated to the building's heating terminals, meeting the building's heating energy needs. As an emerging building energy-saving system, the solar-wind-geothermal multi-energy complementary heating system offers advantages over single-source heating systems, including greater applicability, lower energy consumption, and less environmental pollution, gradually becoming a major direction for building energy conservation. However, due to complex weather patterns in Northwest China and improper matching of system operating parameters, the system still faces technical bottlenecks such as low energy efficiency and poor stability. Therefore, in-depth research on improving the performance of solar-wind-geothermal multi-energy complementary heating systems is urgently needed. This research has significant theoretical and practical engineering application value for promoting my country's building energy-saving technology to an internationally leading level. Summary of the Invention

[0005] This utility model proposes a low-energy-consumption, high-stability solar-wind-geothermal multi-energy complementary heating system and method, characterized by mainly comprising: a deep geothermal heat exchanger, a first to an eighth control valve, a first circulating pump, a second circulating pump, a first water tank, a second water tank, a radiator, an evaporator, a throttling valve, a compressor, a condenser, a heating building, a wind-magnetic heater, and a solar collector; wherein the deep geothermal heat exchanger includes an inner geothermal heat exchange pipe and an outer geothermal heat exchange pipe, and the wind-magnetic heater includes a magnet and a rotating cylinder, and also includes wind turbine blades connected to the rotating cylinder via a rotating shaft; The outlet of the first water tank is connected to the inlet of the first circulating pump via the second control valve. The outlet of the first circulating pump is connected to the outer pipe of the geothermal heat exchanger. The outlet of the inner pipe of the geothermal heat exchanger is connected to the hot side inlet of the evaporator via the first control valve. The hot side outlet of the evaporator is connected to the inlet of the first water tank. The cold side inlet of the evaporator is connected to the first end of the throttle valve. The cold side outlet of the evaporator is connected to the inlet of the compressor. The outlet of the compressor is connected to the hot side inlet of the condenser. The hot side outlet of the condenser is connected to the second end of the throttle valve. The outlet of the second water tank is connected to the inlet of the second circulation pump via the third control valve. The outlet of the second circulation pump is divided into three paths: the first path is connected to the inlet of the solar collector via the fourth control valve, and the outlet of the solar collector is connected to the inlet of the terminal heating radiator in the heating building via the sixth control valve, while the outlet of the terminal heating radiator is connected to the inlet of the second water tank; the second path is connected to the cold side inlet of the condenser via the seventh control valve, and the cold side outlet of the condenser is connected to the inlet of the terminal heating radiator in the heating building via the fifth control valve; the third path is connected to the inlet of the wind-magnetic heater via the eighth control valve, and the outlet of the wind-magnetic heater is connected to the inlet of the terminal heating radiator in the heating building.

[0006] The aforementioned solar-wind-geothermal multi-energy complementary heating system is characterized by: a coaxial type medium-deep geothermal heat exchanger with a drilling depth of 500 m-3000 m, an inner tube diameter of 100-200 mm, and an outer tube diameter of 200-300 mm. By extracting heat energy from medium-deep underground rock and further improving the energy quality through a heat pump system, the system can meet the building's winter heating needs.

[0007] The solar-wind-geothermal multi-energy complementary heating system is characterized in that: the heat pump system formed by the evaporator, throttling valve, compressor, and condenser uses R134a, R22, R123, R142b, or R410A as the working fluid. The solar-wind-geothermal multi-energy complementary heating system is further characterized in that: the rotating drum in the wind-magnetic heater is coaxially connected to the wind turbine blades.

[0008] The solar-wind-geothermal multi-energy complementary heating system is characterized in that: the wind power generation system first converts wind energy into mechanical energy through wind turbine blades, then converts it into thermal energy through the magnetic field in the wind-magnetic heater, and finally transfers the heat to the building through a fluid medium.

[0009] The operating method of the solar-wind-geothermal multi-energy complementary heating system is characterized by the following process: storing softened water in a first water tank and a second water tank. This system has three heating modes depending on weather conditions.

[0010] When solar radiation is good, the solar heating mode is adopted. The third control valve, the fourth control valve, the sixth control valve and the second circulation pump are opened. The working water in the second water tank enters the solar collector system under the drive of the second circulation pump, absorbs solar energy and rises in temperature, and then enters the terminal heating radiator to supply heat to the building. When wind energy is good, the wind energy heating mode is adopted. The third control valve, the eighth control valve, and the second circulation pump are turned on. The working fluid water in the second water tank enters the rotating drum in the wind-magnetic heater under the drive of the second circulation pump. Under the action of wind force, the wind turbine blades start to rotate, thereby driving the rotating drum in the wind-magnetic heater connected to the rotating shaft to rotate. Under the action of the magnetic field of the magnet in the wind-magnetic heater, the rotating drum generates heat on the wall surface according to the principle of electromagnetic induction heat generation, and transfers the heat to the working fluid water. The heated working fluid water enters the terminal heating radiator directly through the outlet of the wind-magnetic heater to supply heat to the heating building. When solar and wind energy are unavailable, a medium-deep geothermal heating mode is adopted. The first, second, third, fourth, fifth, and seventh control valves, as well as the first and second circulation pumps, are opened. The working fluid water in the first water tank, driven by the first circulation pump, enters the geothermal heat exchanger outer pipe, absorbs the geothermal heat energy from the medium-deep underground rock, and then enters the evaporator hot side through the geothermal heat exchanger inner pipe to heat the refrigerant working fluid. After absorbing heat, the refrigerant working fluid evaporates into high-temperature, low-pressure steam, and then enters the compressor for compression, heating, and pressurization into high-temperature, high-pressure steam. It then enters the condenser hot side, releasing heat to the working fluid water from the second water tank. The heated working fluid water then enters the terminal heating radiators to supply heat to the building.

[0011] This invention combines solar thermal utilization technology, wind magnetic heating technology, and medium-deep geothermal heat exchange technology to fully utilize solar energy, wind energy, and geothermal energy. It meets the energy demand of buildings in the cold and arid Northwest region during winter heating and has the advantages of high energy utilization efficiency, low operating cost, and strong operational stability. It is suitable for fields such as HVAC and industrial heating. Attached Figure Description

[0012] Figure 1This utility model proposes a multi-energy complementary heating system and method based on solar energy, wind energy, and geothermal energy. The labels in the diagram are as follows: 1. Inner geothermal heat exchanger pipe; 2. Outer geothermal heat exchanger pipe; 3-1-3-8 First control valve - Eighth control valve; 4-1 First circulation pump; 4-2 Second circulation pump; 5-1 First water tank; 5-2 Second water tank; 6. Radiator; 7. Evaporator; 8. Throttling valve; 9. Compressor; 10. Condenser; 11. Heated building; 12. Wind-magnetic heater; 13. Magnet; 14. Rotary drum; 15. Rotary shaft; 16. Wind turbine blade; 17. Solar collector. Detailed Implementation

[0013] Figure 1 This utility model proposes a multi-energy complementary heating system and method based on solar, wind, and geothermal energy. The following refers to... Figure 1 Describe the specific working process of this technology.

[0014] The device operates as follows: Softened water is stored in the first water tank 5-1 and the second water tank 5-2. This system has three heating modes depending on the weather conditions.

[0015] When solar radiation is good, the solar heating mode is adopted. The third control valve 3-3, the fourth control valve 3-4, the sixth control valve 3-6 and the second circulation pump 4-2 are opened. The working water in the second water tank 5-2 enters the solar collector 17 system under the drive of the second circulation pump 4-2, absorbs solar energy and rises in temperature, and then enters the terminal heating radiator 6 to supply heat to the heating building 11. When wind energy is good, the wind energy heating mode is adopted. The third control valve 3-3, the eighth control valve 3-8, and the second circulation pump 4-2 are opened. The working water in the second water tank 5-2 enters the rotating cylinder 14 in the wind-magnetic heater 12 under the drive of the second circulation pump 4-2. Under the action of wind, the wind turbine blades 16 start to rotate, thereby driving the rotating cylinder 14 in the wind-magnetic heater 12 connected to the rotating shaft 15 to rotate. Under the action of the magnetic field of the magnet 13 in the wind-magnetic heater 12, the rotating cylinder 14 generates heat on the wall according to the principle of electromagnetic induction heat generation, and transfers the heat to the working water. The heated working water enters the terminal heating radiator 6 directly through the outlet of the wind-magnetic heater 12 to supply heat to the heating building 11. When solar and wind energy are insufficient, a medium-deep geothermal heating mode is adopted. The first control valve 3-1, the second control valve 3-2, the third control valve 3-3, the fourth control valve 3-4, the fifth control valve 3-6, the seventh control valve 3-7, the first circulation pump 4-1, and the second circulation pump 4-2 are opened. The working water in the first water tank 5-1, driven by the first circulation pump 4-1, enters the geothermal heat exchange outer pipe 2, absorbs the geothermal heat energy of the medium-deep underground rock, and then enters the geothermal heat exchange inner pipe 1 to enter the hot side of the evaporator 7 to heat the refrigerant working fluid. After absorbing heat, the refrigerant working fluid evaporates into high-temperature, low-pressure steam, and then enters the compressor 9 to compress, heat up, and pressurize into high-temperature, high-pressure steam, and then enters the hot side of the condenser 10 to release heat to the working water from the second water tank 5-2. The heated working water enters the terminal heating radiator 6 to supply heat to the heating building 11.

[0016] Although the specific implementation process of this utility model has been described in detail above with reference to the accompanying drawings, this does not limit the utility model. Those skilled in the art should understand that all changes and improvements made within the spirit and principles of this utility model and under its guidance are within the protection scope of this utility model.

Claims

1. A solar energy-wind energy-geothermal energy multi-energy complementary heating system, characterized in that The main components include: a deep geothermal heat exchanger, a first control valve (3-1), a second control valve (3-2), a third control valve (3-3), a fourth control valve (3-4), a fifth control valve (3-5), a sixth control valve (3-6), a seventh control valve (3-7), an eighth control valve (3-8), a first circulating pump (4-1), a second circulating pump (4-2), a first water tank (5-1), a second water tank (5-2), a radiator (6), an evaporator (7), a throttle valve (8), a compressor (9), a condenser (10), a heating building (11), a wind-magnetic heater (12), and a solar collector (17); wherein the deep geothermal heat exchanger includes a geothermal heat exchange inner tube (1) and a geothermal heat exchange outer tube (2), wherein the wind-magnetic heater (12) includes a magnet (13) and a rotating cylinder (14), and also includes wind turbine blades (16) connected to the rotating cylinder through a rotating shaft (15); The outlet of the first water tank (5-1) is connected to the inlet of the first circulating pump (4-1) via the second control valve (3-2). The outlet of the first circulating pump (4-1) is connected to the outer pipe (2) of the geothermal heat exchanger. The outlet of the inner pipe (1) of the geothermal heat exchanger is connected to the hot side inlet of the evaporator (7) via the first control valve (3-1). The hot side outlet of the evaporator (7) is connected to the inlet of the first water tank (5-1). The cold side inlet of the evaporator (7) is connected to the first end of the throttle valve (8). The cold side outlet of the evaporator (7) is connected to the inlet of the compressor (9). The outlet of the compressor (9) is connected to the hot side inlet of the condenser (10). The hot side outlet of the condenser (10) is connected to the second end of the throttle valve (8). The outlet of the second water tank (5-2) is connected to the inlet of the second circulation pump (4-2) via the third control valve (3-3). The outlet of the second circulation pump (4-2) is divided into three paths. The first path is connected to the inlet of the solar collector (17) via the fourth control valve (3-4). The outlet of the solar collector (17) is connected to the inlet of the terminal heating radiator (6) in the heating building (11) via the sixth control valve (3-6). The outlet of the terminal heating radiator (6) is connected to the inlet of the second water tank (5-2). The second path is connected to the cold side inlet of the condenser (10) via the seventh control valve (3-7). The cold side outlet of the condenser (10) is connected to the inlet of the terminal heating radiator (6) in the heating building (11) via the fifth control valve (3-5). The third path is connected to the inlet of the wind-magnetic heater (12) via the eighth control valve (3-8). The outlet of the wind-magnetic heater (12) is connected to the inlet of the terminal heating radiator (6) in the heating building (11).

2. The solar energy, wind energy and geothermal energy multi-energy complementary heating system according to claim 1, characterized in that The main features include: the medium-deep geothermal heat exchanger is a shell-and-tube type, with a drilling depth of 500 m-3000 m, an inner tube diameter of 100-200 mm, and an outer tube diameter of 200-300 mm.

3. The solar energy, wind energy and geothermal energy multi-energy complementary heating system according to claim 1, characterized in that: The heat pump system formed by the evaporator (7), throttle valve (8), compressor (9), and condenser (10) uses R134a, R22, R123, R142b, or R410A as the working fluid.

4. The solar energy, wind energy and geothermal energy multi-energy complementary heating system according to claim 1, characterized in that: The rotating drum (14) in the above-mentioned air-magnetic heat exchanger (12) is coaxially connected with the air blades (16).

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