Energy storage power generation system

Abstract

The utility model discloses an energy storage power generation system, comprising an electric energy conversion device or a heat energy collection device used for converting electric energy into heat energy or collecting 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. According to the energy storage power generation system, the energy conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a large-capacity, low-cost, safe, green and environmentally friendly energy storage power generation system. Background Art

[0002] With the commissioning of photovoltaic power generation, wind power generation, hydropower generation, nuclear power generation, etc., the peak and trough phenomena of power generation have become increasingly prominent, resulting in overload of the power grid during peak power generation and huge pressure. At the same time, there is a shortage of electricity during peak power consumption and serious waste of electricity during trough power consumption. The key to solving this problem is to vigorously develop the energy storage industry, store the excess electricity in a scientific form and method when power generation is at peak and power consumption is at low point, and convert and supplement it in time when power generation is at low point and power consumption is at peak, so as to play a "peak" role.

[0003] However, there is still room for improvement in the conversion efficiency of existing energy storage systems. Utility Model Content

[0004] In order to overcome at least one defect in the prior art, the utility model provides an energy storage power generation system.

[0005] The energy storage and power generation system of the utility model comprises: an electric energy conversion device or a thermal energy collection device, which is used to convert electric energy into thermal energy or collect thermal energy; a thermal energy storage device, which is used to store the thermal energy converted by the electric energy conversion device or the thermal energy collected by the thermal energy collection device; a steam power generation device, which is used to generate electricity using the stored thermal energy; and a pipeline, which passes through the electric energy conversion device or the thermal energy collection device, the thermal energy storage device and the steam power generation device, and is filled with a first heat-conducting medium.

[0006] According to an embodiment of the utility model, the electric energy conversion device includes an electric heating unit and / or an electromagnetic unit, and the electric heating unit and / or the electromagnetic unit are used to convert electric energy into thermal energy and transfer it to the first heat conducting medium in the pipeline.

[0007] According to another embodiment of the present invention, the thermal energy storage device includes one or more independent units.

[0008] According to another embodiment of the present invention, the thermal energy storage device includes a second heat-conducting medium for storing thermal energy and performing heat exchange with the first heat-conducting medium in the pipeline.

[0009] According to another embodiment of the present invention, a heat preservation unit is arranged on the periphery of the thermal energy storage device.

[0010] According to another embodiment of the present utility model, one or more temperature measuring units are provided in the electric energy conversion device, the thermal energy collection device and the thermal energy storage device.

[0011] According to another embodiment of the utility model, the steam power generation device uses the heat energy transferred by the first heat conducting medium in the pipeline to generate steam power.

[0012] According to another embodiment of the utility model, the residual heat energy of the steam power generation device after power generation is transferred to the heat energy collection device.

[0013] According to another embodiment of the utility model, the portion of the pipeline in the electric energy conversion device, the thermal energy collection device and the steam power generation device is provided with one or more control valves and one or more high-temperature circulation pumps.

[0014] According to another embodiment of the present invention, the pipeline is a stainless steel pipeline.

[0015] The utility model first converts electrical energy into thermal energy through an electric energy conversion device, or collects the excess thermal energy of the enterprise through a thermal energy collection device. In the system of the utility model, the converted thermal energy or the collected excess thermal energy of the enterprise is used to heat the heat-conducting medium in the pipeline, and enters the thermal energy storage device through the pipeline, and the thermal energy is transferred to the heat-conducting medium in the thermal energy storage device for storage. When it is needed, the thermal energy in the medium is transferred to the steam power generation device through the "heat-conducting material" in the pipeline to generate electricity. The excess thermal energy after power generation is supplied to the enterprise that needs steam, or recycled again, which improves the conversion efficiency of the energy storage power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an energy storage and power generation system according to an exemplary embodiment of the utility model.

[0017] The reference numerals are described as follows:

[0018] 1-Electric energy conversion device

[0019] 2- Thermal energy storage device

[0020] 3-Steam power generation device

[0021] 4- Pipeline

[0022] 5-Control valve

[0023] 6-High temperature circulation pump

[0024] 7-Electric heating unit

[0025] 8-Temperature measurement unit

[0026] 9- Second heat transfer medium DETAILED DESCRIPTION

[0027] Typical embodiments that embody 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 changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0028] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form a part of the present invention and in which different exemplary structures, systems and steps that can implement multiple aspects of the present invention are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present invention. Moreover, although the terms "electric energy conversion device or thermal energy collection device", "thermal energy storage device", "steam power generation device", "control valve", "high temperature pump, air power pump", "heat transfer medium", "medium", etc. can be used in this specification to describe different exemplary features and elements of the present invention, these terms are used herein only for convenience, for example, according to the direction of the examples described in the accompanying drawings, nothing in this specification should be understood as requiring a specific three-dimensional direction of the structure to fall within the scope of the present invention.

[0029] As described above, the energy storage power generation system in this embodiment is described by converting electrical energy into thermal energy for storage and then converting it back into electrical energy. It is easy for those skilled in the art to understand that the relevant design of the utility model is also applied to collect and store the residual thermal energy in the production process of all enterprises, which can also be converted into electrical energy or other forms of energy for utilization.

[0030] The energy storage power generation system in this embodiment is described with "heat conductive medium" as the carrier of energy transfer, but it is by no means limited to the use of only "heat conductive medium". It is easy for those skilled in the art to understand that it also includes the use of any device that can convert electrical energy into thermal energy, converting electrical energy into thermal energy and directly transferring it to the medium for storage.

[0031] The storage medium in the energy storage power generation system in this embodiment is by no means limited to one type of medium. It is easy for those skilled in the art to understand that it also includes all other solid or liquid substances that can absorb, store, and release thermal energy.

[0032] The utilization method of the thermal energy stored in the energy storage power generation system in this embodiment is explained by converting the stored thermal energy into electrical energy through a steam power generation system, but it is by no means limited to this utilization method. It is easy for those skilled in the art to understand that it also includes using the stored thermal energy to generate hot water energy, steam energy, hot air energy and other other usable methods.

[0033] The energy storage and power generation system of the utility model includes: an electric energy conversion device or a thermal energy collection device, which is used to convert electric energy into thermal energy or collect surplus thermal energy generated by all enterprises (such as thermal power plants, steel mills, etc.); a thermal energy storage device, which is used to store the converted or collected thermal energy; a steam power generation device, which is used to generate electricity using the stored thermal energy; and a pipeline, which is filled with a first heat-conducting medium (not shown in the figure) through the electric energy conversion device or the thermal energy collection device, the thermal energy storage device and the steam power generation device. The function of the first heat-conducting medium is to transfer thermal energy between the electric energy conversion device or the thermal energy collection device, the thermal energy storage device and the steam power generation device to achieve energy conversion. The first heat-conducting medium can be any liquid or gaseous flowable material, such as but not limited to oil, air, etc.

[0034] The energy storage and power generation system of the utility model first converts electric energy into thermal energy through an electric energy conversion device, or collects thermal energy through a thermal energy collection device. The electric energy conversion device can be any device that can convert electric energy into thermal energy, and directly converts electric energy into thermal energy and then transfers it to the first heat-conducting medium in the pipeline for storage. For example, an electromagnetic heating or other heating device is wrapped around the outside of the pipeline in the electric energy conversion device to convert electric energy into thermal energy and transfer it to the first heat-conducting medium in the pipeline. Or an electric heating rod is used for heating. When an electric heating rod is used for heating, the electric heating rod can be directly set in the thermal energy storage device to reduce the loss of heat transfer process. Of course, when an electric heating rod is used for heating, the electric heating rod can be set outside the thermal energy storage device to achieve the purpose of the utility model. The electric energy conversion device can adopt a method of converting electric energy into thermal energy, or it can adopt multiple methods of converting electric energy into thermal energy at the same time. The thermal energy collection device can be any appropriate device that can collect thermal energy, and the collected thermal energy is transferred to the first heat-conducting medium in the pipeline. One or more control valves, one or more high-temperature circulation pumps and other supporting equipment are provided at appropriate positions of the pipeline in the electric energy conversion device or the thermal energy collection device. A temperature measuring unit may be provided at a suitable position of the pipeline in the electric energy conversion device or the thermal energy collection device, for measuring and controlling the temperature of the first heat conducting medium in the pipeline.

[0035] The converted or collected heat energy is transferred to the heat energy storage device for storage through the first heat-conducting medium in the 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, the units are connected by pipelines and controlled by valves, so that the independence of the units can be maintained and the connection between the units can be realized. According to the energy storage needs, one of the units can be used alone or multiple units can be used at the same time. The second heat-conducting medium can be any material that can store heat energy, for example, including all other solid or liquid substances that can absorb, store, and release heat energy. The second heat-conducting medium can be used an unlimited number of times in theory. The physical structure of the second heat-conducting medium can be adjusted according to the energy storage needs. According to the energy storage needs and the composition of the second heat-conducting medium, the temperature of the second heat-conducting medium after energy storage can be controlled at 1 degree Celsius to several thousand degrees Celsius. The second heat-conducting medium can be in contact with the pipeline to achieve heat exchange with the first heat-conducting medium in the pipeline. The first heat-conducting medium and the second heat-conducting medium in the energy storage power generation system of the utility model can be any appropriate material. Therefore, this type of medium has many advantages: extremely cheap and easy-to-obtain materials, extremely low investment, huge energy storage capacity, no pollution, absolutely green and environmentally friendly, no safety hazards, can be promoted on a large scale, anti-aging, can be used unlimited times, etc. It has overcome all the difficulties in the current energy storage field.

[0036] The outer periphery of the thermal energy storage device can be provided with a heat preservation unit for heat preservation treatment as required, such as using heat insulation cotton, vacuum, etc. One or more temperature measuring units are provided at appropriate positions inside to detect the temperature inside the thermal energy storage device.

[0037] The thermal energy storage device provides thermal energy to the steam power generation device through the first heat transfer medium of the pipeline. The steam power generation device 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 and other other available methods to generate electricity. The remaining heat after power generation can be collected and recycled by the thermal energy collection device, or it can be supplied to enterprises that need steam. One or more control valves, one or more high-temperature circulation pumps and other supporting equipment can be installed at appropriate locations of the pipeline in the steam power generation device.

[0038] The pipeline in the energy storage power generation system of the utility model can be a stainless steel pipeline, or any high temperature resistant pipeline.

[0039] Of course, the energy storage and power generation system of the present invention may also include any other appropriate devices.

[0040] The concept of the present utility model is explained in detail below with reference to the accompanying drawings.

[0041] like Figure 1As shown, the energy storage power generation system in this embodiment is described by converting electrical energy into thermal energy and storing it, and then converting the stored thermal energy into electrical energy again. Therefore, it is easy for those skilled in the art to understand that: in order to apply the relevant design of the utility model to other types of energy storage processes, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described above or below, and these changes are still within the scope of the energy storage power generation system principle proposed by the utility model.

[0042] like Figure 1 As shown, in this embodiment, the energy storage power generation system includes: an electric 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 circulation pump 6, an electric heating unit 7, a temperature measuring unit 8, and a second medium 9.

[0043] Figure 1 The schematic diagram of the structure of the energy storage power generation system that can embody the principle of the utility model is representatively shown in FIG. The structure, connection mode and functional relationship of each main component of the energy storage power generation system proposed by the utility model are described in detail below in conjunction with the above drawings.

[0044] like Figure 1 As shown, in this embodiment, the electric energy conversion device 1 is arranged on the base, and the first heat transfer medium in the pipeline 4 transfers the heat in the electric energy conversion device 1 to the thermal energy storage device 2. The second heat transfer medium 9 in the thermal energy storage device 2 absorbs the heat energy transferred from the electric energy conversion device 1 and stores it. The pipeline 4 in the thermal energy storage device 2 transfers the heat energy to the steam power generation device 3 through the first heat transfer medium, and the steam power generation device 3 generates electricity using the heat energy stored in the thermal energy storage device 2. The control valve 5 and the high-temperature circulation pump 6 are started or closed as needed.

[0045] The electric energy 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, and the unit volume and shape can be determined according to actual needs. Each unit is independently controlled, and one or more units are enabled according to actual needs. The distribution density of the heat-conducting pipe 4 in the thermal energy storage device 2 is determined according to needs. The thermal energy storage device 2 is filled with the "medium" 9 mentioned above, and the medium 9 completely and fully covers the heat-conducting pipe 4. The purpose is to promote the transfer of thermal energy to the maximum extent. The electric energy conversion device 1 and the thermal energy storage device 2 are provided with a temperature measuring unit 8 for detecting the temperature in the device. The electric heating unit 7 (electric heating rod) is arranged in the thermal energy storage device to convert electric energy into thermal energy.

[0046] After the steam power generation device 3 is started, the pipeline 4 in the thermal energy storage device 2 transfers the heat energy in the thermal energy storage device 2 to the steam power generation device 3, and the steam power generation link is started. The surplus heat energy generated by steam power generation is supplied to the enterprise using steam or recycled to achieve the maximum efficiency of energy utilization.

[0047] The device of the utility model may also include other auxiliary devices, such as a mounting bracket and mounting accessories.

[0048] It should be noted that the energy storage power generation systems shown in the drawings and described in this specification are only a few examples of many energy storage power generation systems that can adopt 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 of the energy storage power generation systems shown in the drawings or described in this specification or any components of the energy storage power generation systems.

[0049] The above describes and / or illustrates in detail an exemplary embodiment of the energy storage power generation system proposed by the utility model. However, the embodiments of the utility model are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. The terms "heat transfer medium", "unit", "collection", "transfer", "conversion", etc. are used to express an open-ended inclusive meaning and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc. In addition, the terms in the claims and the specification are used only as markers and are not numerical limitations on their objects.

[0050] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model 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 electric energy conversion device or a thermal energy collection device, used to convert electric energy into thermal energy or collect thermal energy; A thermal energy storage device, used to store the thermal energy converted by the electric energy conversion device or the thermal energy collected by the thermal energy collection device; A steam power generation device for generating electricity from the stored thermal energy; a pipeline, passing through the electric energy conversion device or the thermal energy collection device, the thermal energy storage device and the steam power generation device, the pipeline being filled with a first heat-conducting medium; Wherein, the electric energy conversion device comprises an electric heating unit and / or an electromagnetic unit, and the electric energy is converted into thermal energy through the electric heating unit and / or the electromagnetic unit and transferred to the first heat-conducting medium in the pipeline; The thermal energy storage device comprises a second heat-conducting medium for storing thermal energy and performing heat exchange with the first heat-conducting medium in the pipeline; a heat-insulating unit is arranged on the periphery of the thermal energy storage device; The residual heat energy after the steam power generation device generates electricity is transferred to the heat energy collection device.

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

3. The energy storage power generation system according to claim 1, characterized in that: One or more temperature measuring units are arranged in the electric energy conversion device, the thermal energy collection device and the thermal energy storage device.

4. 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 transfer medium in the pipeline to generate steam power.

5. The energy storage power generation system according to claim 1, characterized in that: The pipeline is provided with one or more control valves and one or more high-temperature circulation pumps in the parts of the electric energy conversion device, the thermal energy collection device and the steam power generation device.

6. The energy storage power generation system according to claim 1, characterized in that: The pipeline is a stainless steel pipeline.

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