Distributed electric heat storage device for peak regulation

Abstract

The utility model discloses a distributed electric heat storage device for peak regulation, which relates to the technical field of electric heat storage and comprises a cavity, a support and a top cover, the support is welded at the bottom of the cavity, a clamping groove at the top of the cavity is connected with the top cover, a material conversion component is mounted in the cavity and divides the cavity into two independent functional areas, and the material conversion component is connected with the top cover. Wherein a heat storage cavity is formed in the left side, a heat release cavity is formed in the right side, a condenser is installed on the outer side of the cavity, and a vacuum air extractor is installed on the end face of the upper portion of the top cover. Through a heat absorption process and a heat release process of a thermochemical reversible reaction of Ca (OH) 2 / CaO, a distributed electric heat storage device is formed by combining a heat storage cavity, a heat release cavity and electric energy, flexible peak regulation of power utilization is achieved when new energy of a power grid is in a high load, civil life requirements are met when the new energy is in a low load, and the aim of resource utilization is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric thermal energy storage technology, specifically a distributed electric thermal energy storage device for peak shaving. Background Technology

[0002] In modern society, electricity is indispensable in many aspects such as office work, study, transportation, and leisure. With the increasing demand for electricity, the stable operation of the power system has become crucial. To solve the problems of power load fluctuations, ensure power supply quality, and meet the power supply needs of different regions, energy storage and thermal energy storage technologies are widely used in power system peak shaving. They can alleviate and improve the mismatch between energy supply and demand in terms of time, space, and intensity, and effectively improve the stability and reliability of the power system. Currently, there are three thermal energy storage methods: sensible thermal energy storage, latent thermal energy storage, and thermochemical thermal energy storage. Among them, thermochemical thermal energy storage has been widely explored due to its high energy density and low heat loss.

[0003] Therefore, in the research of thermal storage devices and related fields, patent CN12284168A describes a thermal storage device that preheats the gas medium before it enters the thermal storage chamber. The heated gas medium diffuses and fully contacts the thermal storage medium upon entering the chamber, resulting in a uniform temperature increase throughout the thermal storage medium. This avoids the problems of temperature rise, low heat exchange efficiency, and easy damage to the thermal storage medium caused by direct electric heating. Patent CN 204693827U describes an electric thermal storage device that includes an electrical control unit, an electric thermal storage unit, and a heat exchange unit. The electrical control unit consists of a power supply, etc. The electric thermal storage unit includes an insulation shell, etc.; the heat exchange unit includes a filter device, etc. Its key feature is that a filter device is installed in the circulation channel at the front end of the medium driver, and a series compensation capacitor is added between the power supply and the device, making it suitable for power supply systems above 220V. Patent CN112539673A describes an electric-thermal-electric energy storage system and method. During energy storage, electrical energy is used to heat the heat storage medium, thereby converting electrical energy into thermal energy stored in the heat storage medium (silicon). During energy release, a thermodynamic conversion device converts the thermal energy in the energy storage medium back into electrical energy, ensuring efficient thermodynamic conversion. Patent CN104180698A describes an energy storage thermal device where excess heat is absorbed by solid particles when heat storage is needed, and the working fluid to be heated absorbs heat from the solid particles to raise its own temperature when heat release is needed. This thermal storage device enables graded storage and graded extraction of heat, improving upon the shortcomings of common thermal storage devices that suffer from uniform temperature rise and fall during heat storage.

[0004] However, current thermal storage devices are mostly used in a one-way manner, either directly or indirectly using energy storage media or thermal storage materials to generate electricity. There has been no in-depth exploration of the recycling of energy storage media or thermal storage materials, nor of the issue of flexible peak shaving under different extreme conditions at different times. Utility Model Content

[0005] The purpose of this invention is to provide a distributed electric thermal energy storage device for peak shaving, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a distributed electric thermal storage device for peak shaving, comprising a cavity, a support, and a top cover. The support is welded to the bottom of the cavity, and the top cover is connected to the top of the cavity by a slot. A material conversion assembly is installed inside the cavity, which divides the cavity into two independent functional areas, wherein the left side is a thermal storage chamber and the right side is a thermal release chamber. A condenser is installed on the outside of the cavity, and a vacuum pump is installed on the upper end face of the top cover.

[0007] Preferably, the cavity has a cylindrical structure, and the outer side of the cavity is coated with a heat-insulating layer of microwave-absorbing material.

[0008] Preferably, the heat storage chamber includes a microwave pyrolysis unit, a temperature sensor, a connector, and a central computer controller. The microwave pyrolysis unit is installed inside the left interlayer of the chamber. A temperature sensor is threadedly connected to the upper left side of the chamber and electrically connected to the connector. A connector is installed at the lower outer end of the chamber. A central computer controller is located on the outer side of the chamber and electrically connected to the connector. The connector is electrically connected to the microwave pyrolysis unit.

[0009] Preferably, the heat release chamber includes a serpentine heat exchanger, an inlet, an outlet, a water pipe, and a water storage tank. The serpentine heat exchanger is installed inside the right-side interlayer of the chamber. The upper end of the serpentine heat exchanger has an inlet, and the lower end has an outlet. The serpentine heat exchanger is connected to the water storage tank through the water pipe. The water storage tank can be connected to an external water pump. The water storage tank pipe is connected to a condenser. The serpentine heat exchanger can be connected to an external turbine power generation device.

[0010] Preferably, the material conversion assembly includes a servo motor, a coupling, a conversion sleeve, a modular turntable shaft, a microwave-absorbing insulation board, a turntable support, a rotating disk, air holes, and a bottom bearing. The upper end face of the top cover is threadedly connected to the servo motor via fixed support legs. The output shaft of the servo motor is fixedly connected to the coupling. The conversion sleeve is sleeved on the outer side of the coupling. The lower end of the coupling is fixedly connected to the modular turntable shaft. The microwave-absorbing insulation board is vertically fixedly connected to the outer side of the modular turntable shaft. The rotating disk is fixedly connected to the bottom outer side of the modular turntable shaft. Air holes are evenly distributed on the outer edge of the rotating disk. The bottom inner side of the modular turntable shaft is sleeved with a bottom bearing. The bottom of the bottom bearing is rotatably connected to the turntable support.

[0011] Preferably, the coupling is a segmented and splicable structure, with a threaded head at one end and a threaded slot at the other end. The length of the microwave absorbing insulation board matches the inner height of the cavity, the diameter of the rotating disk matches the inner diameter of the cavity, and the servo motor is electrically connected to the central computer controller.

[0012] Preferably, the condenser is connected to the heat storage chamber through a pipe penetrating the top cover, and the condenser is connected to the heat release chamber through a water spray pipe penetrating the top cover.

[0013] Preferably, the vacuum pump is provided in two sets, and the two sets of vacuum pumps are respectively connected to the heat storage chamber and the heat release chamber, and the vacuum pumps are electrically connected to the central computer controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model, by setting up a cavity, support, top cover, condenser, and vacuum pumping mechanism, forms a heat storage / heat release unit, constituting a self-circulating system device. Through the thermochemical reversible reaction of Ca(OH)2 / CaO, the heat storage cavity, heat release cavity, and electrical energy are combined to form a distributed electric thermal energy storage device. During periods of high load on the power grid's renewable energy sources, the device can flexibly adjust peak demand, while during periods of low load, it can be used for residential needs, thus achieving the goal of resource utilization. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a top view of the structure of this utility model.

[0019] In the diagram: 1. Cavity; 11. Heat storage chamber; 111. Microwave pyrolysis device; 112. Temperature sensor; 113. Connector; 114. Central computer controller; 12. Heat release chamber; 121. Serpentine heat exchanger; 122. Water inlet; 123. Water outlet; 124. Water guide pipe; 125. Water storage tank; 13. Material conversion assembly; 131. Servo motor; 132. Coupling; 133. Conversion sleeve; 134. Splicable turntable shaft; 135. Wave-absorbing insulation board; 136. Turntable support; 137. Rotating disc; 138. Vent; 139. Bottom bearing; 2. Support; 3. Top cover; 4. Condenser; 5. Vacuum pump. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-3 The present invention provides an embodiment of a distributed electric thermal energy storage device for peak shaving, comprising a cavity 1, a support 2, and a top cover 3. The support 2 is welded to the bottom of the cavity 1, and the top cover 3 is connected to the top of the cavity 1 by a slot. A material conversion assembly 13 is installed inside the cavity 1, which divides the cavity 1 into two independent functional areas, wherein the left side is a thermal energy storage chamber 11 and the right side is a thermal energy release chamber 12. A condenser 4 is installed on the outside of the cavity 1, and a vacuum pump 5 is installed on the upper end face of the top cover 3.

[0025] Furthermore, cavity 1 has a cylindrical structure, and the outer side of cavity 1 is coated with a heat-insulating layer of microwave-absorbing material, which serves to isolate it from room temperature.

[0026] Furthermore, the heat storage chamber 11 includes a microwave thermal decomposer 111, a temperature sensor 112, a connector 113, and a central computer controller 114. The microwave thermal decomposer 111 is installed inside the left interlayer of the chamber 1. The temperature sensor 112 is threadedly connected to the upper left side of the chamber 1. The temperature sensor 112 is electrically connected to the connector 113. The connector 113 is installed at the lower outer end of the chamber 1. The central computer controller 114 is located on the outer side of the chamber 1. The central computer controller 114 is electrically connected to the connector 113. The connector 113 is electrically connected to the microwave thermal decomposer 111, providing a heat source for the thermal decomposition of Ca(OH)2. In the microwave field, the vibration of the particles inside Ca(OH)2 is continuously intensified, causing the temperature of Ca(OH)2 to rise due to the absorption of heat, resulting in an endothermic reaction and thermal decomposition to produce CaO and water, converting electrical energy into chemical energy stored in CaO.

[0027] Furthermore, the heat release chamber 12 includes a serpentine heat exchanger 121, an inlet 122, an outlet 123, a water pipe 124, and a water storage tank 125. The serpentine heat exchanger 121 is installed inside the right side interlayer of the chamber 1. The upper end of the serpentine heat exchanger 121 has an inlet 122, and the lower end of the serpentine heat exchanger 121 has an outlet 123. The serpentine heat exchanger 121 is connected to the water storage tank 125 through the water pipe 124. The water storage tank 125 can be connected to an external water pump. The water storage tank 125 is connected to the condenser 4 through a pipe. The serpentine heat exchanger 121 can be connected to an external turbine power generation device. Heat is released through the hydration reaction of CaO and water in the material chamber. The medium water in the serpentine heat exchanger on one side absorbs a large amount of heat to form high-temperature and high-pressure steam, which can be connected in parallel to the turbine power generation device to generate electricity and be connected to the power grid, or form high-grade water to meet the daily hot water supply needs of users.

[0028] Furthermore, the material conversion assembly 13 includes a servo motor 131, a coupling 132, a conversion sleeve 133, a modular turntable shaft 134, a microwave-absorbing insulation board 135, a turntable support 136, a rotating disk 137, an air vent 138, and a bottom bearing 139. The upper end face of the top cover 3 is threadedly connected to the servo motor 131 via fixed support legs. The output shaft of the servo motor 131 is fixedly connected to the coupling 132, and the conversion sleeve is sleeved on the outside of the coupling 132. 133, the lower end of the coupling 132 is fixedly connected to the rotating shaft 134 of the splicable turntable, the outer side of the rotating shaft 134 is vertically fixedly connected to the heat insulation board 135 of the wave-absorbing material, the bottom outer side of the rotating shaft 134 is fixedly connected to the rotating disk 137, the outer edge of the rotating disk 137 is evenly provided with air holes 138, the bottom inner side of the rotating shaft 134 is sleeved with a bottom bearing 139, and the bottom of the bottom bearing 139 is rotatably connected to the turntable support 136.

[0029] Furthermore, the coupling 132 is a segmented and splicable structure, with a threaded head at one end and a threaded slot at the other end. The length of the heat-absorbing material insulation plate 135 matches the inner height of the cavity 1, and the diameter of the rotating disk 137 matches the inner diameter of the cavity 1. The servo motor 131 is electrically connected to the central computer controller 114. The device rotates the rotating disk carrying Ca(OH)2 / CaO materials by 180° through the servo motor 131, and the material chambers where Ca(OH)2 / CaO are located exchange positions, so that the products become reactants, allowing the heat storage chamber 11 and the heat release chamber 12 to form a stable dynamic cycle at any time.

[0030] Furthermore, the condenser 4 is connected to the heat storage chamber 11 through the top cover 3 via a pipe, and the condenser 4 is connected to the heat release chamber 12 through the top cover 3 via a water spray pipe. The heat storage chamber 11 reduces the load according to the peak electricity demand during the day, and the microwave thermal decomposer 111 is powered on. Under the action of microwaves, microwave energy penetrates into the Ca(OH)2 in the material chamber, so that the Ca(OH)2 is heated evenly. When the temperature reaches 550℃, Ca(OH)2 thermally decomposes to produce CaO and water. This reaction process absorbs heat, and the heat energy converted from electrical energy can be continuously stored in CaO in the form of chemical energy. Temperature sensor 112 in heat storage chamber 11 receives a signal and transmits it to central computer controller 114. The valve of condenser 4 is opened, and water vapor enters condenser 4. After being condensed by condenser 4, it becomes low-grade water and enters water storage tank 125 to achieve flexible peak regulation in stages. In heat release chamber 12, the load is increased according to the peak electricity consumption period of the day. Heat storage chamber 11 is closed or operates at near zero load. Temperature sensor 112 in heat release chamber 12 receives a signal and transmits it to central computer controller 114. The valve of condenser 4 is opened, and water is sprayed at the end of the pipe of water storage tank 125 in material chamber. CaO and water undergo a hydration reaction in material chamber to generate Ca(OH)2 and release heat. The medium water in serpentine heat exchanger 121 in heat release chamber exchanges heat with the heat in material chamber. The exchanged heat causes the medium water to form high-temperature and high-pressure steam. The high-temperature and high-pressure steam is connected to a turbine generator to generate electricity and is connected to the grid, or to supply users' daily hot water needs to achieve flexible peak regulation in stages.

[0031] Furthermore, there are two sets of vacuum pumps 5, which are connected to the heat storage chamber 11 and the heat release chamber 12 respectively. The vacuum pumps 5 are electrically connected to the central computer controller 114, which can realize automatic control.

[0032] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A distributed electrical thermal storage device for peak shaving comprising a cavity (1), a support (2) and a top cover (3), characterized in that: The bottom of the cavity (1) is welded with a support (2), the top of the cavity (1) is connected with a top cover (3) through a clamping groove, the inside of the cavity (1) is installed with a material conversion assembly (13), the material conversion assembly (13) divides the cavity (1) into two independent functional areas, wherein the left side is a heat storage chamber (11) and the right side is a heat release chamber (12), the outside of the cavity (1) is installed with a condenser (4), and the top cover (3) is installed with a vacuum air extractor (5) on the upper end face.

2. A distributed electrical thermal storage device for peak shaving according to claim 1, wherein: The cavity (1) is in a barrel shape, and the outside of the cavity (1) is coated with a heat preservation layer of wave absorbing material.

3. A distributed electrical thermal storage device for peak shaving according to claim 1, wherein: The heat storage chamber (11) comprises a microwave thermal decomposer (111), a temperature sensor (112), a wiring device (113) and a central computer controller (114), the microwave thermal decomposer (111) is installed in the left side interlayer of the cavity (1), the temperature sensor (112) is threadedly connected to the upper left side of the inside of the cavity (1), the temperature sensor (112) is electrically connected with the wiring device (113), the wiring device (113) is installed at the lower end of the outside of the cavity (1), the central computer controller (114) is arranged on the outside of the cavity (1), the central computer controller (114) is electrically connected with the wiring device (113), and the wiring device (113) is electrically connected with the microwave thermal decomposer (111).

4. The distributed electric thermal storage system for peak shaving of claim 1, wherein: The heat release chamber (12) comprises a serpentine heat exchanger (121), a water inlet (122), a water outlet (123), a water guide pipe (124) and a water storage tank (125), the serpentine heat exchanger (121) is installed in the right side interlayer of the cavity (1), the upper end of the serpentine heat exchanger (121) is provided with the water inlet (122), the lower end of the serpentine heat exchanger (121) is provided with the water outlet (123), the serpentine heat exchanger (121) is connected with the water storage tank (125) through the water guide pipe (124), the water storage tank (125) can be externally connected with a water pump device, the water storage tank (125) is connected with the condenser (4) through a pipeline, and the serpentine heat exchanger (121) can be externally connected with a turbine power generation device.

5. A distributed electrical thermal storage device for peak shaving according to claim 1, wherein: The material conversion assembly (13) comprises a servo motor (131), a shaft coupling (132), a conversion sleeve (133), a splicable rotating disc shaft (134), a wave-absorbing material heat insulation plate (135), a rotating disc support (136), a rotating disc (137), air holes (138), and a bottom bearing (139), the upper end surface of the top cover (3) is threadedly connected with the servo motor (131) through a fixed leg, the output shaft of the servo motor (131) is fixedly connected with the shaft coupling (132), the shaft coupling (132) is externally sleeved with the conversion sleeve (133), the lower end of the shaft coupling (132) is fixedly connected with the splicable rotating disc shaft (134), the outer side of the splicable rotating disc shaft (134) is vertically fixedly connected with the wave-absorbing material heat insulation plate (135), the bottom outer side of the splicable rotating disc shaft (134) is fixedly connected with the rotating disc (137), the outer side edges of the rotating disc (137) are uniformly provided with the air holes (138), the bottom inner side of the splicable rotating disc shaft (134) is sleeved with the bottom bearing (139), and the bottom of the bottom bearing (139) is rotatably connected with the rotating disc support (136).

6. A distributed electrical thermal storage device for peak shaving according to claim 5, wherein: The shaft coupling (132) is a segmented splicable structure, one end is provided with a threaded head, and the other end is provided with a threaded slot, the length of the wave-absorbing material heat insulation plate (135) matches the inner height of the cavity (1), the diameter of the rotating disc (137) matches the inner diameter of the cavity (1), and the servo motor (131) is electrically connected with the central computer controller (114).

7. The distributed electric thermal storage system for peak shaving of claim 1, wherein: The condenser (4) is communicated with the heat storage chamber (11) through the top cover (3) by a pipeline, and the condenser (4) is communicated with the heat release chamber (12) through the top cover (3) by a water spraying pipe.

8. The distributed electric thermal storage system for peak shaving of claim 1, wherein: The vacuum air extractor (5) is provided with two groups, and the two groups of vacuum air extractors (5) are communicated with the heat storage chamber (11) and the heat release chamber (12) respectively, and the vacuum air extractor (5) is electrically connected with the central computer controller (114).

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