Energy storage power generation system

Abstract

The invention discloses an energy storage power generation system which comprises an electric energy conversion device or a heat energy collection device used for converting electric energy into heat energy or collecting the heat energy; the heat energy storage device is used for storing the heat energy converted by the electric energy conversion device or the heat energy collected by the heat energy collection device; the steam power generation device is used for generating power by using the stored heat energy; and the pipeline passes through the electric energy conversion device or the heat energy collection device, the heat energy storage device and the steam power generation device, and the pipeline is filled with a first heat-conducting medium. The energy storage power generation system can be stored and used in a large scale according to actual needs and peak-valley conditions. Power grid pressure is changed fundamentally, dependence on coal, petroleum, natural gas and the like is eliminated fundamentally, an energy structure is changed thoroughly, and carbon emission is reduced thoroughly.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a large-capacity, low-cost, safe, green and environmentally friendly energy storage and power generation system. Background Technology

[0002] With the commissioning of photovoltaic power generation, wind power generation, hydropower generation, nuclear power generation, etc., the phenomenon of peak and off-peak power generation has become increasingly prominent. This leads to the grid operating under overload and enormous pressure during peak power generation. At the same time, there is a shortage of electricity during peak power consumption and serious waste of electricity during off-peak power consumption. The key to solving this problem is to vigorously develop the energy storage industry, to store the excess electricity in a scientific form and in a scientific way during peak power generation and off-peak power consumption, and to convert and supplement it in a timely manner during off-peak power generation and peak power consumption, so as to play a "peak" role.

[0003] The main energy storage methods currently available are: 1) Pumped hydro storage, which has the disadvantages of relying on geographical conditions, requiring high-capacity hydropower stations, and having high construction costs for pumping stations; it also has a significant impact on geography and topography; 2) Compressed air storage, which has the disadvantages of being greatly limited by geographical conditions, having limited energy storage capacity, requiring large investments, posing a huge risk of explosion, having significant safety hazards, and being difficult to use on a large scale or commercially; 3) Chemical energy storage, which has the disadvantages of low energy storage capacity, high construction costs, significant safety hazards, short service life, and being prone to serious environmental pollution during production and disposal; 4) Phase change energy storage, which has the disadvantages of complex technology, high price, easy aging, low thermal conductivity, low energy storage capacity, easy volatility, high flammability, and being difficult to promote.

[0004] The current energy storage industry is struggling because, under existing technological conditions, energy storage facilities are expensive to build, have low storage capacity, short lifespans, and pose serious safety risks and environmental pollution, making them uneconomical and difficult to promote on a large scale. No single technology or equipment can simultaneously meet the following requirements for energy storage: low cost, convenient construction, huge storage capacity, long lifespan, green and pollution-free operation, no potential safety hazards, easy to promote, capable of peak-shifting storage, long-term storage across seasons, capable of converting electrical energy into thermal energy for storage, capable of collecting and storing surplus heat generated during industrial production, capable of both small-scale and virtually unlimited storage, convenient to use, unaffected by seasons, climate, or geographical location, with storage media that can be used an unlimited number of times, large-scale promotion capability, and high economic efficiency. This is a global challenge. Summary of the Invention

[0005] To overcome at least one of the defects in the prior art, the present invention provides an energy storage power generation system.

[0006] The energy storage and power generation system of the present invention includes: an electrical energy conversion device or a heat energy collection device for converting electrical energy into heat energy or collecting heat energy; a heat energy storage device for storing the heat energy converted by the electrical energy conversion device or the heat energy collected by the heat energy collection device; a steam power generation device for generating electricity from the stored heat energy; and a pipeline through which the electrical energy conversion device or the heat energy collection device, the heat energy storage device and the steam power generation device pass, wherein the pipeline is filled with a first heat-conducting medium.

[0007] According to one embodiment of the present invention, the power conversion device includes an electrothermal unit and / or an electromagnetic unit, through which electrical energy is converted into heat energy and transferred to the first heat-conducting medium in the pipeline.

[0008] According to another embodiment of the present invention, the thermal energy storage device includes one or more independent units.

[0009] According to another embodiment of the present invention, the thermal energy storage device includes a second thermally conductive medium for storing thermal energy and exchanging heat with the first thermally conductive medium in the pipe.

[0010] According to another embodiment of the present invention, a heat preservation unit is provided on the outer periphery of the thermal energy storage device.

[0011] According to another embodiment of the present invention, one or more temperature measuring units are provided in the power conversion device, the heat collection device and the heat storage device.

[0012] According to another embodiment of the present invention, the steam power generation device utilizes the heat energy transferred by the first heat-conducting medium in the pipeline to generate steam power.

[0013] According to another embodiment of the present invention, the residual heat energy after the steam power generation device generates electricity is transferred to the heat energy collection device.

[0014] According to another embodiment of the present invention, the portion of the pipeline in the power conversion device, the heat collection device and the steam power generation device is provided with one or more control valves and one or more high-temperature circulating pumps.

[0015] According to another embodiment of the present invention, the pipe is a stainless steel pipe.

[0016] This invention first converts electrical energy into heat energy using an electrical energy conversion device or a heat energy collection device to collect surplus heat energy from the enterprise. In the system of this invention, the converted heat energy or the collected surplus heat energy is used to heat a heat-conducting medium in a pipeline, which then flows through the pipeline into a heat energy storage device, where the heat energy is transferred to the heat-conducting medium for storage. When needed, the heat energy in the medium is again transferred through the "heat-conducting material" in the pipeline to a steam power generation device to generate electricity. The surplus heat energy after power generation is supplied to enterprises that need steam or recycled again.

[0017] This invention solves the global problem of energy storage based on pure physical principles and from a physical essence. The advantages of this invention are: 1) It has a huge storage capacity, realizing large-scale and ultra-large-scale energy storage, and can form large-scale and ultra-large-scale artificial geothermal resources; 2) It can convert electrical energy into thermal energy and store it for use, reducing electrical energy waste, with a high energy conversion rate and huge economic benefits; 3) It can collect and store the surplus thermal energy generated in the production process of enterprises, with almost no cost, extremely high economic benefits, greatly reducing resource waste and carbon emissions. Other energy storage methods cannot collect and store the surplus heat generated during enterprise production; 4) Low-cost storage: the storage medium is extremely inexpensive and readily available, can be used an unlimited number of times, has low cost, is easy to construct, and is easy to promote; 5) The energy storage and reuse processes of this invention do not involve any combustion or chemical reaction, and no chemical additives are added, truly achieving green and pollution-free operation; 6) No potential dangers, achieving absolute safety in the energy storage industry; 7) All-time storage: short-term off-peak storage and long-term storage across seasons are both possible; 8) All-environment storage: unaffected by seasons, climate, geographical location, etc.; 9) Low-energy-consumption storage: the storage method of this invention has low heat loss and low energy consumption rate; 10) It can store small amounts or almost unlimited amounts. It can be promoted on a large scale with extremely high economic benefits.

[0018] With the energy storage and power generation system of this invention, the country can vigorously develop power generation industries such as solar, wind, hydro, and nuclear power, and store and use energy on a large scale according to actual needs and peak / valley conditions. This will fundamentally change the pressure on the power grid, fundamentally eliminate dependence on coal, oil, natural gas, etc., completely change the energy structure, and drastically reduce carbon emissions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an energy storage power generation system according to an exemplary embodiment of the present invention.

[0020] The reference numerals in the attached figures are explained as follows:

[0021] 1-Electricity Conversion Device

[0022] 2-Thermal Energy Storage Device

[0023] 3-Steam power generation unit

[0024] 4-pipeline

[0025] 5-Control valve

[0026] 6-High Temperature Circulating Pump

[0027] 7-Electric Heating Unit

[0028] 8-Temperature Measurement Unit

[0029] 9-Second heat transfer medium Detailed Implementation

[0030] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the description and drawings therein are for illustrative purposes only and not intended to limit the present invention.

[0031] In the following description of different exemplary embodiments of the invention, reference is made to the accompanying drawings, which form part of the invention, and which illustrate by way of example various exemplary structures, systems, and steps that can implement multiple aspects of the invention. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the invention. Furthermore, while the terms “electrical energy conversion device or thermal energy harvesting device,” “thermal energy storage device,” “steam power generation device,” “control valve,” “high-temperature pump, pneumatic pump,” “heat transfer medium,” “medium,” etc., may be used in this specification to describe different exemplary features and elements of the invention, these terms are used herein for convenience only, for example, according to the orientation of the examples shown in the drawings, and nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the invention.

[0032] As described above, the energy storage power generation system in this embodiment is illustrated by converting electrical energy into heat energy for storage and then converting it back into electrical energy. Those skilled in the art will readily understand that this also includes applying the relevant design of the present invention to collecting and storing surplus heat energy from all enterprise production processes, which can then be converted back into electrical energy or other forms of energy for utilization.

[0033] The energy storage power generation system described in this embodiment uses a "thermal conductive medium" as the energy transfer carrier, but it is by no means limited to using only a "thermal conductive medium". Those skilled in the art will easily understand that it also includes any device that can convert electrical energy into heat energy, and directly transfer the electrical energy to the medium for storage.

[0034] The storage medium in the energy storage power generation system of this embodiment is by no means limited to one type of medium. As will be readily understood by those skilled in the art, it also includes all other solid or liquid substances that can absorb, store, and release heat energy.

[0035] The utilization of the thermal energy stored in the energy storage power generation system in this embodiment is illustrated by taking the conversion of the stored thermal energy into electrical energy through a steam power generation system as an example. However, it is by no means limited to this one utilization method. Those skilled in the art will readily understand that it also includes various other usable methods such as using the stored thermal energy to form hot water energy, steam energy, and hot air energy.

[0036] The energy storage and power generation system of the present invention includes: an energy conversion device or a heat collection device for converting electrical energy into heat energy or collecting surplus heat energy generated by any enterprise (such as a thermal power plant, steel plant, etc.); a heat storage device for storing the converted or collected heat energy; a steam power generation device for generating electricity using the stored heat energy; and a pipeline through which the energy conversion device or the heat collection device, the heat storage device, and the steam power generation device are connected, the pipeline being filled with a first heat-conducting medium (not shown in the figure). The first heat-conducting medium transfers heat energy between the energy conversion device or the heat collection device, the heat storage device, and the steam power generation device, thereby realizing energy conversion. The first heat-conducting medium can be any liquid or gaseous flowable material, such as, but not limited to, oil, air, etc.

[0037] The energy storage and power generation system of this invention first converts electrical energy into heat energy through an energy conversion device, or collects heat energy through a heat collection device. The energy conversion device can be any device capable of converting electrical energy into heat energy, directly transferring the converted energy to a first heat-conducting medium within a pipe for storage. For example, an electromagnetic heating element or other heating device can be wound around the outside of the pipe within the energy conversion device to convert electrical energy into heat energy and transfer it to the first heat-conducting medium within the pipe. Alternatively, an electric heating rod can be used. When using an electric heating rod, it can be directly placed within the heat storage device to reduce heat loss during the transfer process. Of course, placing the electric heating rod outside the heat storage device also achieves the purpose of this invention. The energy conversion device can employ one or more methods to convert electrical energy into heat energy simultaneously. The heat collection device can be any suitable device capable of collecting heat energy, which is then transferred to the first heat-conducting medium within the pipe. One or more control valves, one or more high-temperature circulating pumps, and other supporting equipment are installed at appropriate locations within the pipe of the energy conversion device or heat collection device. Temperature measuring units can be installed at appropriate locations in the pipes of the power conversion device or heat collection device to measure and control the temperature of the first heat-conducting medium in the pipe.

[0038] The converted or collected heat energy is transferred to a heat energy storage device for storage via a first heat-conducting medium within a pipeline. The heat energy storage device includes a second heat-conducting medium for storing heat energy. The heat energy storage device can be one or more independent units with a certain volume. When multiple independent units are included, they are connected by pipelines and controlled by valves, maintaining both the independence of the units and enabling interconnection. Depending on the energy storage requirements, one unit can be used individually, or multiple units can be used simultaneously. The second heat-conducting medium can be any material capable of storing heat energy, including any other solid or liquid substance capable of absorbing, storing, and releasing heat energy. The second heat-conducting medium can theoretically be used an unlimited number of times. The physical structure of the second heat-conducting medium can be adjusted according to the energy storage requirements. Depending on the energy storage requirements and the composition of the second heat-conducting medium, the temperature of the second heat-conducting medium after energy storage can be controlled from 1 degree Celsius to several thousand degrees Celsius. The second heat-conducting medium can contact the pipeline to achieve heat exchange with the first heat-conducting medium within the pipeline. The first and second heat-conducting media in the energy storage power generation system of this invention can be any suitable material. Therefore, this type of medium has many advantages: the materials are extremely cheap and readily available, the investment is very low, the energy storage capacity is huge, there is no pollution, it is absolutely green and environmentally friendly, there are no safety hazards, it can be promoted on a large scale, it is resistant to aging, and it can be used an unlimited number of times. It has overcome all the current problems in the field of energy storage.

[0039] The outer perimeter of the thermal energy storage device can be insulated as needed, using insulation materials, vacuum insulation, etc. One or more temperature sensing units are installed in suitable locations inside the device to monitor the internal temperature.

[0040] The thermal energy storage device supplies thermal energy to the steam power generation unit via a first heat transfer medium through pipelines. The steam power generation unit uses the transferred thermal energy to generate steam. For example, the thermal energy can be directly converted into hot water energy, steam energy, hot air energy, or other usable methods for power generation. The remaining heat after power generation can be collected and recycled by a thermal energy collection device, or it can be supplied to enterprises that need steam. One or more control valves, one or more high-temperature circulating pumps, and other supporting equipment can be installed at appropriate locations within the pipelines of the steam power generation unit.

[0041] In the energy storage and power generation system of the present invention, the pipes can be stainless steel pipes or any high-temperature resistant pipes.

[0042] This invention's energy storage and power generation system solves the global challenge of energy storage from a purely physical perspective. It not only converts electrical energy into heat energy for storage but also collects and stores surplus heat energy from all industrial processes, saving significant amounts of energy. The energy storage and reuse processes involve no combustion, no chemical additives, no chemical reactions, and no safety hazards, achieving absolute safety in the energy storage industry. Simultaneously, it meets the requirements of massive storage capacity, low cost, extremely low investment, low energy loss rate, high economic benefits, no chemical media, green safety, no pollution, easy promotion, and the ability to store energy in all time periods and environments. It allows for off-peak storage, long-term storage across seasons, and is unaffected by seasonal, climatic, or geographical factors. It can convert electrical energy into heat energy for storage, collect and store surplus heat energy generated during industrial processes, and can store both small amounts and virtually unlimited amounts. It is convenient to use, the storage medium can be used an unlimited number of times, and it can be widely promoted. It solves the global challenge of the energy storage industry.

[0043] The energy conversion rate in this invention is about 60% to 86% of the original energy, and the output value is about 1.5 to 4 times that of the original energy output value, resulting in huge economic benefits.

[0044] Of course, the energy storage power generation system of the present invention may also include any other suitable devices.

[0045] The concept of the present invention will be explained in detail below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, the energy storage power generation system in this embodiment is illustrated by converting electrical energy into heat energy and storing it, and then converting the stored heat energy back into electrical energy. Therefore, those skilled in the art will readily understand that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described above or below in order to apply the relevant designs of this invention to other types of energy storage processes, and these changes are still within the scope of the principles of the energy storage power generation system proposed in this invention.

[0047] like Figure 1 As shown, in this embodiment, the energy storage power generation system includes: an energy conversion device 1, a thermal energy storage device 2, a steam power generation device 3, a pipeline 4, a control valve 5, a high-temperature circulating pump 6, an electric heating unit 7, a temperature measuring unit 8, and a second medium 9.

[0048] Figure 1 The accompanying drawings illustrate a representative structural diagram of an energy storage power generation system that embodies the principles of this invention. The following, in conjunction with the accompanying drawings, provides a detailed description of the structure, connection methods, and functional relationships of the main components of the energy storage power generation system proposed in this invention.

[0049] like Figure 1As shown, in this embodiment, the power conversion device 1 is mounted on the base. The first heat-conducting medium in the pipe 4 transfers heat from the power conversion device 1 to the thermal energy storage device 2. The second heat-conducting medium 9 in the thermal energy storage device 2 absorbs and stores the heat energy transferred from the power conversion device 1. The pipe 4 in the thermal energy storage device 2 transfers the heat energy to the steam power generation device 3 through the first heat-conducting medium. The steam power generation device 3 uses the heat energy stored in the thermal energy storage device 2 to generate electricity. The control valve 5 and the high-temperature circulating pump 6 are started or stopped as needed.

[0050] The power conversion device 1 can be made of stainless steel or other high-temperature resistant materials and is heated by electromagnetic or other means. The thermal energy storage device 2 can be divided into several storage units, the volume and shape of which can be determined according to actual needs. Each unit is independently controlled, and one or more units can be activated as needed. The distribution density of the heat-conducting pipes 4 within the thermal energy storage device 2 is determined as needed. The thermal energy storage device 2 is filled with the aforementioned "medium" 9, which completely and fully covers the heat-conducting pipes 4. The purpose is to maximize the transfer of heat energy. Temperature measuring units 8 are installed in both the power conversion device 1 and the thermal energy storage device 2 to detect the temperature within the devices. An electric heating unit 7 (heating rod) is installed within the thermal energy storage device to convert electrical energy into heat energy.

[0051] After the steam power generation unit 3 is started, the pipe 4 in the thermal energy storage device 2 transfers the heat energy in the thermal energy storage device 2 to the steam power generation unit 3, thus starting the steam power generation process. The surplus heat energy generated by the steam power generation is supplied to enterprises using steam or recycled again, achieving maximum energy utilization efficiency.

[0052] The device of the present invention may also include other auxiliary devices, such as mounting brackets and mounting accessories.

[0053] It should be noted that the energy storage power generation systems shown in the accompanying drawings and described in this specification are merely a few examples of many energy storage power generation systems capable of employing the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or components of the energy storage power generation systems shown in the accompanying drawings or described in this specification.

[0054] The exemplary embodiments of the energy storage power generation system proposed by the present invention have been described and / or illustrated in detail above. However, the embodiments of the present invention are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. The terms "thermal conductive medium," "unit," "collection," "transfer," "conversion," etc., are used to indicate an open-ended inclusion meaning and refer to the presence of additional elements / components / etc. besides those listed. Furthermore, the terms in the claims and description are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy storage power generation system, characterized in that, include: An electrical energy conversion device or a heat energy collection device, used to convert electrical energy into heat energy or collect heat energy; A thermal energy storage device for storing thermal energy converted by the electrical energy conversion device or thermal energy collected by the thermal energy collection device; Steam power generation equipment, used to generate electricity from stored heat energy; The pipeline passes through the electrical energy conversion device or the heat energy collection device, the heat energy storage device and the steam power generation device, and the pipeline is filled with a first heat-conducting medium.

2. The energy storage power generation system according to claim 1, characterized in that, The power conversion device includes an electrothermal unit and / or an electromagnetic unit, which converts electrical energy into heat energy and transfers it to the first heat-conducting medium in the pipeline.

3. The energy storage power generation system according to claim 1, characterized in that, The thermal energy storage device includes one or more independent units.

4. The energy storage power generation system according to claim 1, characterized in that, The thermal energy storage device includes a second heat-conducting medium for storing thermal energy and exchanging heat with the first heat-conducting medium in the pipeline.

5. The energy storage and power generation system according to claim 1, characterized in that, The thermal energy storage device is equipped with a heat preservation unit on its outer periphery.

6. The energy storage power generation system according to claim 1, characterized in that, The power conversion device, the heat collection device, and the heat storage device are equipped with one or more temperature measuring units.

7. The energy storage power generation system according to claim 1, characterized in that, The steam power generation device utilizes the heat energy transferred by the first heat-conducting medium in the pipeline to generate steam power.

8. The energy storage power generation system according to claim 1, characterized in that, The residual heat energy generated by the steam power generation device is transferred to the heat collection device.

9. The energy storage and power generation system according to claim 1, characterized in that, The pipeline is equipped with one or more control valves and one or more high-temperature circulating pumps in the portions of the power conversion device, the heat collection device, and the steam power generation device.

10. The energy storage and power generation system according to claim 1, characterized in that, The pipe is a stainless steel pipe.

Images