Hydrothermal energy storage power generation complete device

Abstract

A hydrothermal energy storage power generation complete device comprises an outer shell, a plurality of water storage tanks are installed in the outer shell, a resistance heater assembly and a power gas heat exchange coil pipe are arranged in each water storage tank, and the resistance heater assemblies can be electrically connected with an external power source; the adjacent power gas heat exchange coil pipes are communicated and connected, the output end of the last power gas heat exchange coil pipe is communicated with a gas inlet of a generator assembly and can radially spray medium gas to push a generator rotor to achieve power generation, and a waste gas outlet of the generator assembly is communicated with a negative pressure gas storage tank. The negative pressure gas storage tank is communicated with a compressor, and the compressor is communicated with the input end of the first power gas heat exchange coil pipe to form a power gas continuous circulation system; the power output end of the generator assembly is connected with the power distribution box, and the compressor is electrically connected with the power distribution box and an external power source.

Description

Technical Field

[0001] The invention belongs to the technical field of power generation and relates to a complete set of hydrothermal energy storage power generation equipment. Background Art

[0002] Currently, the widely used power storage methods, such as battery electrochemical method, pumped storage power generation method, or high-pressure gas energy storage, have the following disadvantages:

[0003] 1. Energy storage density: Batteries that use chemical energy storage methods, especially power batteries, have low energy storage density.

[0004] 2. Energy storage safety: Chemical batteries have relatively high safety risks and are prone to combustion and explosion risks.

[0005] 3. Energy storage life: As the number of uses of chemical batteries increases, their energy storage capacity will decay. When the decay reaches a certain level, the battery's energy storage performance will quickly disappear until it is scrapped.

[0006] 4. The climate adaptability range is relatively small: both high and low temperatures will significantly affect the energy storage effect.

[0007] 5. Environmental pollution: After chemical batteries are scrapped, they will affect the environment for a long time and continue to have a negative impact on water sources and soil.

[0008] 6. Difficult to repair: Chemical batteries cannot be repaired, and if a malfunction occurs during use, the function cannot be restored through repair. Summary of the invention

[0009] In order to solve the above technical problems, the present invention provides a complete set of hydrothermal energy storage and power generation equipment with high safety performance, reasonable cost, high energy storage density, high efficiency and long service life.

[0010] The technical solution adopted by the present invention is:

[0011] A hydrothermal energy storage and power generation device comprises an outer shell, in which a plurality of water storage tanks are installed, each of which is provided with a resistance heater assembly and a power gas heat exchange coil, and the resistance heater assembly can be electrically connected to an external power source; adjacent power gas heat exchange coils are interconnected, the output end of the last power gas heat exchange coil is connected to the air inlet of the generator assembly and can radially spray medium gas to drive the generator rotor to achieve power generation, the exhaust gas outlet of the generator assembly is connected to a negative pressure gas storage tank, the negative pressure gas storage tank is connected to a compressor, the compressor is connected to the input end of the first power gas heat exchange coil to form a power gas continuous circulation system; the power output end of the generator assembly is connected to a power distribution box, and the compressor is electrically connected to the power distribution box and the external power source respectively.

[0012] Furthermore, the upper parts of adjacent water storage tanks are connected.

[0013] Furthermore, a pressure relief device is provided on the upper portion of each water storage tank.

[0014] Furthermore, the resistance heater assembly is connected to a main power transmission cable via an input cable, and the outer end of the main power transmission cable protrudes out of the outer shell.

[0015] Furthermore, a power transmission connector plug-in assembly is provided at the outer end of the main power transmission cable.

[0016] Furthermore, the input end of the first power gas heat exchange coil is connected to the compressor through a power medium gas return pipe.

[0017] Furthermore, valves are provided at the connection end of the power medium gas return pipe and the compressor and at the output end of the last power gas heat exchange coil.

[0018] Furthermore, a heat-insulating component is provided between the outer shell and the water storage tank.

[0019] Furthermore, it also includes a central control system, which is respectively connected to the resistance heater assembly, the first valve, the second valve, the generator assembly, the power distribution box and the pressure relief device controlled by it.

[0020] Beneficial effects of the present invention:

[0021] 1. High energy density, the power storage capacity far exceeds the power storage capacity of any chemical battery used in existing electric vehicles. Compared with the corresponding endurance, the endurance of the present invention can exceed 1,000 kilometers. Multiple water storage tanks can be connected in parallel as needed to increase the capacity, and the power storage capacity can be increased at a low cost.

[0022] 2. High safety. The energy storage of the present invention adopts water vaporization as the main energy storage method, and is equipped with pressure limiting and pressure relief protection devices. Even if the device loses control and causes hot water and steam to leak out, its energy destructive power will be eliminated quickly, and no combustion or explosion will occur. The power generation medium gas generally uses nitrogen or carbon dioxide, and even if it leaks, there is no risk of explosion and combustion.

[0023] 2. Perfect environmental protection. The materials used in the present invention are completely recyclable. The outer shell and supporting materials are generally made of high-strength steel, which is a renewable and environmentally friendly material. The energy storage medium is natural water, which is also completely recyclable. The power generation medium gas comes from air separation, which is completely harmless and can be recycled.

[0024] 3. Adaptability to all climate environments. The use environment of power generation gas and other materials is the climate adaptability limit of the present invention. The present invention can adapt to temperatures as low as minus 160°C (when the power generation medium is nitrogen) or minus 70°C (when the power generation medium is carbon dioxide). When electrical materials are made of high temperature resistant materials, they can be used in a temperature environment of 100°C.

[0025] 4. Ultra-long service life. The heat storage part of the present invention can have an almost unlimited service life. The actual use scenario is affected by the production method, and it can generally be considered to be more than 50 years. In view of the material and processing factors involved in the power generation and discharge part, the service life can generally be considered to be more than 15 years. With modular design, some wearing parts can be easily replaced, and the actual service life can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a main structural schematic diagram of the present invention;

[0027] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0028] Figure 3 It is a control flow diagram of the present invention.

[0029] Among them, 1. Mounting support; 2. Water storage tank; 3. Resistance heater assembly; 4. Input cable; 5. Power medium gas return pipe; 6. Main power transmission cable; 7. First valve; 8. Power transmission connector plug-in assembly; 9. Compressor; 10. Negative pressure gas storage tank; 11. Compressor cable; 12. Generator assembly; 13. Power distribution box; 14. Electrical appliances; 15. Central control system; 16. Second valve; 17. Pressure relief device; 18. Connecting pipe; 19. Power gas connector assembly; 20. Power gas heat exchange coil; 21. Insulation assembly; 22. Pure water; 23. Outer shell. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all possible alternatives, improvements and equivalents within the scope of the claims.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more, unless otherwise clearly defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Referring to 1-3, this embodiment provides a complete set of hydrothermal energy storage and power generation equipment, including an outer shell 23, in which a plurality of water storage tanks 2 are installed, each of which is provided with a resistor heater assembly 3 and a power gas heat exchange coil 20, and the resistor heater assembly 3 can be electrically connected to an external power source; adjacent power gas heat exchange coils 20 are connected to each other, and the output end of the last power gas heat exchange coil 20 is connected to the air inlet of the generator assembly 12 and can radially spray medium gas to drive the generator rotor to achieve power generation, and the The exhaust gas outlet of the generator assembly 12 is connected to the negative pressure gas storage tank 10, the negative pressure gas storage tank 10 is connected to the compressor 9, the compressor 9 is connected to the input end of the first power gas heat exchange coil 20 to form a power gas continuous circulation system; the power output end of the generator assembly 12 is connected to the power distribution box 13, the power distribution box 13 is electrically connected to the electrical appliances 14, and the compressor 9 is electrically connected to the power distribution box 13 and the external power supply respectively. Specifically, the compressor 9 is connected to the power distribution box 13 via a compressor cable 11.

[0035] In this embodiment, the upper parts of the adjacent water storage tanks 2 are connected by connecting pipes 18. The number of water storage tanks 2 can be set according to demand. The water storage tanks 2 are installed in the outer shell 23 through the mounting bracket 1. A pressure relief device 17 is provided on the upper part of each water storage tank 2 to ensure safety performance.

[0036] The resistance heater assembly 3 of this embodiment is connected to the main power transmission cable 6 through the input cable 4, and the outer end of the main power transmission cable 6 protrudes out of the outer shell 23. The outer end of the main power transmission cable 6 is provided with a power transmission connector plug-in assembly 8.

[0037] In this embodiment, the input end of the first power gas heat exchange coil 20 is connected to the compressor 9 through the power medium gas return pipe 5. Adjacent power gas heat exchange coils 20 are connected through the power gas connector assembly 19. The connection end of the power medium gas return pipe 5 and the compressor 9 is provided with a first valve 7, and the output end of the last power gas heat exchange coil 20 is provided with a second valve 16.

[0038] In this embodiment, a heat preservation assembly 21 is arranged between the outer shell 23 and the water storage tank 2. The water storage tank 2 is a sealed structure and has a certain pressure bearing capacity.

[0039] This embodiment also includes a central control system 15, which is respectively connected to the resistor heater assembly 3, the first valve 7, the second valve 16, the generator assembly 12, the power distribution box 13 and the pressure relief device 17 controlled by it. A security system is set in the central control system 15 to perform pressure relief control. Temperature sensors, pressure sensors, etc. are correspondingly set in the water storage tank 2, the power gas heat exchange coil 20, the resistor heater assembly 3, the valve, the negative pressure gas storage tank 10 and the compressor 9. Each sensor exchanges information with the central control system 15 to detect and control the status, operation and display of each component. The central control system 15 can independently control each functional component, or can be integrated and controlled, and can be intelligent.

[0040] The present invention is a water heating energy storage, connected to an external power supply, and the electricity generates heat energy through the resistance heater assembly 3. The resistance heater assembly 3 and the purified water for heating are placed in a completely sealed water storage tank 2 with a certain pressure bearing capacity, and a temperature control and safety pressure relief device are set to make the water vapor mixture in the tank at an appropriate temperature and pressure, ensuring that the heated water is completely vaporized, and realizing the conversion of electricity into heat energy.

[0041] The present invention realizes the conversion of power medium gas into electricity by heat exchange. A power gas heat exchange coil 20 is arranged in a water storage tank 2, and the power gas heat exchange coils 20 of multiple water storage tanks 2 are connected in series. The connection output of the coil assembly is a medium gas (carbon dioxide or other stable gas), which is connected to the input port of the generator assembly 12 through a valve. The pressure of the medium gas after heating rises, and the axial input is input into the generator into the air cavity, and the gas flow direction is changed through the output channel of the cavity, and the generator rotor is driven to generate electricity. The generated electricity is input into the power distribution box 13 for power distribution, which is used to maintain the power consumption of the machine (mainly valve control and compressor power) and output to electrical appliances to achieve net power output. The medium gas reduces the pressure and flow rate due to the work done on the motor rotor, and the tail gas enters the preset negative pressure gas storage tank. The medium gas in the negative pressure gas storage tank 10 is connected to the compressor 9 through a pipeline. The compressor 9 pressurizes the low-pressure gas and inputs the power gas heat exchange coil 20 through the valve for reheating, realizing continuous circulation, realizing continuous power output, and realizing the conversion of water vapor heat storage from thermal energy to electricity.

[0042] The present invention uses water-heated gasification phase change energy storage to realize the conversion of electricity into thermal energy, realizes the storage of electric energy under insulation conditions, and converts it into usable electric output through the controlled change of the physical state (pressure, flow, temperature) of the medium gas, thereby completing the storage and release of electricity. The power generation medium gas is circulated under the action of a compressor. The power generation start-up adopts a pre-negative pressure method to achieve the start-up. The heat generation energy storage complete set can be used in parallel or in series, and its external insulation capacity can be set according to the energy storage time requirement. The power generation medium gas of the present invention is not limited to carbon dioxide and nitrogen, but has the same effect on other gases. The device of the present invention is suitable for scenarios where heat is directly heated. The phase change dielectric material of the present invention can be used but is not limited to pure water, and can include the use of other materials.

[0043] The present invention outputs power distribution, and the generated power is input into a power distribution complete set to supply power according to the needs of electrical appliances.

[0044] The specific steps used in the present invention are as follows:

[0045] 1. Before starting, pure water 22 should be injected into the water storage tank 2, and the power medium gas (usually carbon dioxide or nitrogen) should be injected into the negative pressure gas storage tank 10 at a certain pressure (generally not less than 10MPa).

[0046] 2. Carry out comprehensive safety and status inspections. Once the startup conditions are met, the device can enter the startup state.

[0047] 3. External power is input into the resistance heater assembly 3 through the power transmission connector plug-in assembly 8 to generate heat, and the pure water 22 in the water storage tank 2 is vaporized to form a steam-water mixture. The heating temperature is in accordance with the design limit, and the heating power is automatically cut off when the temperature reaches the set value (generally set to 150°C). Simultaneously, when the external power supply is connected, the compressor 9 starts, and the gas from the negative pressure gas storage tank 10 is drawn through the power medium gas return pipe 5 and the first valve 7 and input into the power gas heat exchange coil 20 for heating, and the negative pressure gas storage tank 10 generates a negative pressure area.

[0048] 4. When external power supply is required, the second valve 16 is opened under the control of the central control system 15. Due to the pressure difference, the input gas enters the turning area of ​​the generator assembly 12 axially, and is ejected along the set direction to push the blades connected to the generator rotor, driving the generator rotor to rotate and generate electricity. The electricity is distributed through the power distribution box 13 to maintain the operation of the compressor 9, and output electricity to drive the operation of electrical appliances.

[0049] The number of water storage tanks 2 of the present invention can be expanded according to the scale of power generation to meet the needs of power supply, including usage time and output power. Each component and assembly is equipped with a sensor to collect data, and the data is input into the central processing system through data transmission, and processed according to the set processing program. The whole set of equipment is operated and managed according to the set program. Each component and assembly of the complete set of equipment is equipped with safety emergency facilities to ensure that it operates under safety permission conditions. The device can realize artificial intelligence management and operation.

[0050] A specific application example of the present invention is as follows: A 160KWh hydrothermal energy storage generator device 1. Equipment composition

[0051] 4 sets of water storage tank components, the main technical parameters of each set are as follows;

[0052] The water storage tank 2 is cylindrical in shape, 800 mm long, 250 mm in diameter, with hemispherical covers at both ends, a total length of 940 mm, and a pressure resistance greater than 3 MPa.

[0053] The power gas heat exchange coil 20 has an outer diameter of 36mm, a spiral structure, a spiral body length of 800mm, and a pressure resistance greater than 10MPa.

[0054] The maximum power generation capacity of the generator set is 80kw.

[0055] The maximum heating power of the resistance heater assembly 3 is greater than 200KW.

[0056] Water storage: 300KG

[0057] Insulation: Heat leakage is less than 10% within 72 hours.

[0058] Equipment net weight: less than 100KG

[0059] 2. Power generation output power: 0-150KW.

[0060] 3. Net output power (effective power storage capacity): greater than 160KWh.

[0061] 4. Adaptable climate temperature zone: -100--+100℃.

[0062] 5. Service life: more than 15 years.

[0063] 6. Number of charge and discharge times: unlimited.

[0064] 7. Capacity decay: Nearly zero decay.

[0065] 8. Environmental protection: The whole machine can be recycled.

[0066] 9. Safety: zero explosion and zero combustion.

[0067] Compared with the prior art, the present invention has the following advantages:

[0068] 1. High energy density,

[0069] According to the design, the medium water storage capacity is proportional to the power storage capacity. Taking 300kg of water storage as an example, the water tank size is: 1160mm*960mm*360mm, and the total size including the power generation device is: 1500m*1000*400mm. The water vapor temperature corresponding to full-load power storage is 150℃, that is, the reheating charging prompt temperature is 80℃, and the effective range of discharge (generation) discharge temperature is 80-150℃ for the medium water vapor temperature.

[0070] According to the design, the 72-hour heat leakage rate is less than 10%, and the actual usable heat energy is 662,000 kilojoules, or 184 degrees of electricity.

[0071] According to the design, the efficiency of the expansion of the working gas (usually carbon dioxide or nitrogen) is 90% (full recovery of waste heat), and the actual total power generation (discharge) is 166 kWh.

[0072] According to the design, the total mass of the water storage tank, supporting structure and power generation (discharge) device shall not exceed 100kg, the total mass density of energy storage shall not be less than 1655 kJ / kg, and the available energy density shall not be less than 1480 kJ / kg.

[0073] The current electric vehicles generally have a maximum power storage capacity of no more than 100 kWh and a cruising range of 600 km. The power storage capacity far exceeds the power storage capacity of any chemical battery used in current electric vehicles. Compared with the corresponding cruising range, the cruising range of the present invention can exceed 1,000 km. Multiple water storage tanks can be connected in parallel as needed to increase the capacity, and the power storage capacity can be increased at a low cost.

[0074] 2. High safety. The energy storage of the present invention adopts water vaporization as the main energy storage method, and is equipped with pressure limiting and pressure relief protection devices. Even if the device loses control and causes hot water and steam to leak out, its energy destructive power will be eliminated quickly, and no combustion or explosion will occur. The power generation medium gas generally uses nitrogen or carbon dioxide, and even if it leaks, there is no risk of explosion and combustion.

[0075] 2. Perfect environmental protection. The materials used in the present invention are completely recyclable. The outer shell and supporting materials are generally made of high-strength steel, which is a renewable and environmentally friendly material. The energy storage medium is natural water, which is also completely recyclable. The power generation medium gas comes from air separation, which is completely harmless and can be recycled.

[0076] 3. Adaptability to all climate environments. The use environment of power generation gas and other materials is the climate adaptability limit of the present invention. The present invention can adapt to temperatures as low as minus 160°C (when the power generation medium is nitrogen) or minus 70°C (when the power generation medium is carbon dioxide). When electrical materials are made of high temperature resistant materials, they can be used in a temperature environment of 100°C.

[0077] 4. Ultra-long service life. The heat storage part of the present invention can have an almost unlimited service life. The actual use scenario is affected by the production method, and it can generally be considered to be more than 50 years. In view of the material and processing factors involved in the power generation and discharge part, the service life can generally be considered to be more than 15 years. With modular design, some wearing parts can be easily replaced, and the actual service life can be extended.

Claims

1. A hydrothermal energy storage power generation device, comprising an outer shell, characterized in that: Several water storage tanks are installed in the outer shell, and each water storage tank is provided with a resistance heater assembly and a power gas heat exchange coil, and the resistance heater assembly can be electrically connected to an external power source; adjacent power gas heat exchange coils are connected to each other, and the output end of the last power gas heat exchange coil is connected to the air inlet of the generator assembly and can radially spray medium gas to drive the generator rotor to achieve power generation, the exhaust gas outlet of the generator assembly is connected to the negative pressure gas storage tank, and the negative pressure gas storage tank is connected to the compressor, and the compressor is connected to the input end of the first power gas heat exchange coil to form a power gas continuous circulation system; the power output end of the generator assembly is connected to the power distribution box, and the compressor is electrically connected to the power distribution box and the external power source respectively.

2. A hydrothermal energy storage power generation device according to claim 1, characterized in that: The upper parts of adjacent water storage tanks are connected.

3. A hydrothermal energy storage power generation device according to claim 1 or 2, characterized in that: A pressure relief device is arranged on the upper part of each water storage tank.

4. A hydrothermal energy storage power generation device according to claim 1, characterized in that: The resistance heater assembly is connected to a main power transmission cable via an input cable, and the outer end of the main power transmission cable protrudes out of the outer shell.

5. A hydrothermal energy storage power generation device according to claim 4, characterized in that: The outer end of the main power transmission cable is provided with a power transmission connector plug-in assembly.

6. A hydrothermal energy storage power generation device according to claim 1, characterized in that: The input end of the first power gas heat exchange coil is connected to the compressor through a power medium gas return pipe.

7. A hydrothermal energy storage power generation device according to claim 6, characterized in that: The connection end of the power medium gas return pipe with the compressor and the output end of the last power gas heat exchange coil are both provided with valves.

8. A hydrothermal energy storage power generation device according to claim 1, characterized in that: A heat preservation component is arranged between the outer shell and the water storage tank.

9. The hydrothermal energy storage power generation device according to claim 1, characterized in that: It also includes a central control system, which is respectively connected to the resistance heater assembly, the first valve, the second valve, the generator assembly, the power distribution box and the pressure relief device controlled by the central control system.

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