A controllable heat storage and release device based on microwave heating

Abstract

This invention belongs to the field of thermal energy storage technology, specifically disclosing a controllable heat storage and release device based on microwave heating. It includes a microwave heating unit for converting input electrical energy into microwave energy and controlling the amount of microwave energy released; and a heat storage and release unit for heating the heat storage material using microwave energy during heat storage and releasing and outputting the heat energy from the heat storage material during heat release. This invention, through the controllable emission of microwaves, enables the controllable absorption of redundant power according to power dispatch requirements, thereby improving the heat storage response speed, heating uniformity, and rapid heat storage capacity, achieving controllable power absorption and efficient and stable thermal energy supply.

Description

Technical Field

[0001] This utility model belongs to the field of thermal energy storage technology, specifically relating to a controllable heat storage and release device based on microwave heating. Background Technology

[0002] Thermal energy storage technology is an important means to ensure the safe and stable operation of the power grid, promote energy transformation and green development, and adapt to future energy development trends. When there is an overcapacity of new energy sources, thermal energy storage can be used to store electricity, avoiding the phenomenon of "wind and solar curtailment"; while when there is a power shortage, it can be released in a reasonable manner, improving energy utilization efficiency.

[0003] Currently, research on thermal energy storage technology at the societal level primarily focuses on residential heating applications. In the storage phase, electricity is used to heat the storage material, converting electricity into heat. In the release phase, the heat energy is released to meet heating and other needs. Current thermal energy storage devices mainly consist of process circulation equipment (storage body, circulating fan, heat exchanger, etc.), power supply equipment, and control equipment. Among these, the heating method of the storage body within the process circulation equipment determines its heating effect and is crucial to the overall thermal energy storage capacity of the device. Currently, heating the storage body mainly employs resistance heating, which involves pre-embedding resistance wires within the storage body to heat the storage material. However, resistance heating is slow, has low thermal efficiency, and is prone to localized overheating and poor uniformity. Therefore, there is an urgent need to develop novel technologies that combine rapid heating with thermal energy storage. Utility Model Content

[0004] The purpose of this invention is to provide a controllable heat storage and release device based on microwave heating, so as to improve the heat storage response speed, heating uniformity and rapid heat storage capacity, and realize controllable power consumption and efficient and stable heat energy supply.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, a controllable heat storage and release device based on microwave heating is provided, including a central controller and a controllable heat storage and release terminal based on microwave heating.

[0007] The central controller can optimize the microwave dynamic power allocation scheme by predicting the electricity price curve and the user's heat / electricity demand curve to obtain the microwave heating dynamic power allocation scheme; wherein, the microwave heating dynamic power allocation scheme is used to control the controllable heat storage and release terminal based on microwave heating to store or release heat.

[0008] Microwave-heated controllable heat storage and release terminals include:

[0009] A microwave heating unit is used to convert input electrical energy into microwave energy and control the amount of microwave energy released. The microwave heating unit includes a microwave generator, a waveguide, and a microwave splitter. The waveguide is a waveguide or a slot antenna. The outlet of the microwave generator is connected to the microwave splitter. The outlet of the microwave splitter is connected to the waveguide.

[0010] The heat storage and release unit is used to heat the heat storage material using microwave energy during heat storage and to release and output the heat energy in the heat storage material during heat release.

[0011] According to one embodiment of the present invention, the outlet of the microwave generator is connected to the microwave splitter via a waveguide connector; the outlet of the microwave splitter is connected to the waveguide via a waveguide connector.

[0012] Preferably, the waveguide connector is a flow-resistant sleeve type connector.

[0013] According to one embodiment of the present invention, the controllable heat storage and release device further includes a housing, a waveguide and a microwave brancher are both disposed inside the housing, and the main body of the microwave generator is disposed outside the housing; the heat storage and release unit is disposed inside the housing and is connected to the outside of the housing.

[0014] According to one embodiment of the present invention, the heat storage and release unit includes a heat storage cavity and an external heat exchange unit.

[0015] The heat storage cavity is equipped with hollow pipes and heat storage material inside; the heat storage material is placed on the outer layer of the hollow pipes and is configured in conjunction with the microwave heating unit.

[0016] The external heat exchange unit includes an air duct; the air duct can be connected to a hollow pipe.

[0017] According to one embodiment of the present invention, hollow pipelines are arranged in multiple layers inside the heat storage cavity.

[0018] The hollow pipe is a tubular structure with a hollow interior, and both ends of the hollow pipe are equipped with controllable opening and closing devices.

[0019] According to one embodiment of this utility model, the heat storage material is a sensible heat storage material or a phase change heat storage material.

[0020] According to one embodiment of the present invention, the interior of the heat storage cavity is provided with a temperature sensor and a heat insulation layer; the heat insulation layer is disposed on the inner wall of the heat storage cavity.

[0021] According to one embodiment of the present invention, the external heat exchange unit further includes a circulating fan and a heat exchanger; both the heat exchanger and the circulating fan are located in the air duct, and the circulating fan and the heat exchanger are distributed on both sides of the air duct and cooperate with each other.

[0022] According to one embodiment of the present invention, the heat exchanger is connected to a heat exchange pipe, which includes a heat exchange inlet pipe and a heat exchange outlet pipe.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. By using a controllable heat storage and release terminal based on microwave heating for heat storage or release, and combining microwave heating with heat storage, rapid and uniform heating of heat storage materials can be achieved, increasing heat storage efficiency by more than 2 times. This can effectively improve the response speed to power grid regulation and enable rapid dispatch.

[0025] 2. By setting up microwave splitters and waveguides or slotted antennas with openings, microwaves can be emitted in a controlled manner. Ultimately, redundant power can be controlled and absorbed according to power dispatching needs, and converted into thermal energy for storage. By setting up controllable switches, heat release can be orderly and adjustable according to the heat demand of the load side, avoiding the loss of stored heat. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of the central controller of the controllable heat storage and release device based on microwave heating in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the controllable heat storage and release terminal based on microwave heating in Embodiment 1 of this utility model;

[0029] Figure 3 This is a temperature rise curve of the microwave-heated phase change thermal storage material used in the controllable heat storage and release terminal based on microwave heating in Embodiment 1 of this utility model.

[0030] Reference numerals in the attached diagram: 1. Microwave generator; 2. Microwave splitter; 3. Waveguide; 4. Housing; 5. Insulation layer; 6. Heat storage material; 7. Thermometer; 8. Hollow pipe; 9. Controllable opener / closer; 10. Circulating fan; 11. Air duct; 12. Heat exchanger; 13. Heat exchanger inlet pipe; 14. Heat exchanger outlet pipe. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0032] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention.

[0033] Example 1

[0034] A controllable heat storage and release device based on microwave heating includes a central controller and a controllable heat storage and release terminal based on microwave heating.

[0035] The central controller can optimize the microwave dynamic power allocation scheme by predicting the electricity price curve and the user's heat / electricity demand curve to obtain the microwave heating dynamic power allocation scheme; wherein, the microwave heating dynamic power allocation scheme is used to control the controllable heat storage and release terminal based on microwave heating to store or release heat.

[0036] like Figure 1 As shown, the central controller includes:

[0037] The information acquisition module is used to collect data information, including real-time electricity price information, meteorological information, renewable energy output information, real-time heat / electricity load data, and seasonal information.

[0038] The electricity price forecasting module is used to obtain the predicted electricity price curve based on real-time electricity price information, meteorological information, and renewable energy output information using a trained electricity price forecasting model.

[0039] The load forecasting module is used to obtain the predicted user heat / electricity demand curves based on real-time heat / electricity load data and seasonal information using a trained load forecasting model.

[0040] The optimization decision module is used to construct an objective function based on the predicted electricity price curve and the predicted user heat / electricity demand curve, with the goal of minimizing the difference between the total electricity purchase price and the total electricity sales price, and to determine the corresponding constraints. Based on the constraints, the objective function is solved to obtain a microwave heating dynamic power allocation scheme. The microwave heating dynamic power allocation scheme is used to control the controllable heat storage and release terminal based on microwave heating to store or release heat.

[0041] like Figure 2 As shown, the controllable heat storage and release terminal based on microwave heating includes a microwave heating unit and a heat storage and release unit; wherein, the microwave heating unit is used to convert the input electrical energy into microwave energy and control the amount of microwave energy released; the heat storage and release unit is used to heat the heat storage material 6 with microwave energy during heat storage and to release and output the heat energy in the heat storage material 6 during heat release.

[0042] Specifically, the microwave heating unit includes a microwave generator 1, a waveguide 3, and a microwave splitter 2. The waveguide 3 has an opening and can generally be configured as a waveguide or a slot antenna. The main body of the microwave generator 1 is located outside the housing 4 of the controllable heat storage terminal, while the waveguide 3 and microwave splitter 2 are both located inside the housing 4. The housing 4 is made of metal, typically stainless steel, and forms a cavity with good reflection properties, effectively concentrating the microwave energy generated by the microwave generator 1 onto the heated heat storage material 6. The outlet of the microwave generator 1 is connected to the microwave splitter 2 via a waveguide connector; the outlet of the microwave splitter 2 is connected to the waveguide 3 via a waveguide connector.

[0043] Depending on the requirements, the microwave frequency of microwave generator 1 can be selected as 2.45GHz or 915MHz. For small-scale microwave thermal storage needs, 2.45GHz is preferred; for large-scale microwave thermal storage needs, 915MHz is preferred.

[0044] Preferably, the waveguide connector is a current-resistant sleeve type connector.

[0045] Preferably, the microwave brancher 2 has multiple branch ports, typically 3, 4, 5, 6, 7, 8, 9, or 10.

[0046] The heat storage and release unit includes a heat storage cavity and an external heat exchange unit; the heat storage cavity is the internal space of the metal shell 4 of the controllable heat storage and release terminal, and the interior of the heat storage cavity is equipped with a hollow pipeline 8, heat storage material 6, controllable opener / closer 9, thermometer 7 and insulation layer 5.

[0047] The insulation layer 5 is located on the inner wall of the heat storage cavity, that is, on the inner wall of the shell 4, to reduce energy loss. Preferably, the thickness of the insulation material is 200-350mm.

[0048] The hollow pipe 8 is a hollow tubular structure that is integrally molded, and the heat storage material 6 is placed on the outer layer of the hollow pipe 8.

[0049] Preferably, the heat storage material 6 is a sensible heat storage material or a phase change heat storage material. Generally, sensible heat storage materials can be liquid water, heat transfer oil, liquid metal, etc.; or solid soil, gravel, sand, concrete, etc. Phase change heat storage materials can be organic materials such as polyethylene glycol, paraffin wax, lauric acid, myristic acid, etc., or inorganic materials such as hydrated salts, molten salts, metals and alloys, etc.

[0050] The hollow pipes 8 are arranged in multiple layers inside the heat storage cavity to meet different power grid dispatching and heating needs. The openings of the waveguides 3 correspond to the heat storage material 6 located on the outer wall of the hollow pipes 8. The microwave energy generated by the microwave heating unit can act on the heat storage material 6 through the openings of the waveguides 3 to achieve energy storage. The two ends of the hollow pipes 8 are the outlet and the inlet, respectively, both equipped with controllable openers 9 to control the airflow into and out of the hollow pipes 8. The controllable openers 9 can be butterfly valves, louvered valves, gate valves, or pneumatic / electric valves; preferably, pneumatic / electric valves are used.

[0051] The heat storage cavity is also equipped with multiple temperature sensors 7, which can be located in the upper, middle, and lower layers of the heat storage cavity. The temperature sensors 7 can be configured as infrared temperature measurement devices.

[0052] The external heat exchange unit includes a circulating fan 10, a duct 11, a heat exchanger 12, and heat exchange pipes. The duct 11 is located at the bottom of the heat storage chamber and communicates with the interior of the chamber. It can communicate with the hollow pipe 8 via a controllable open / close device 9 at the inlet and outlet. The upper part of the duct 11 is connected to the lower part of the heat storage chamber with insulation material. The circulating fan 10 and the heat exchanger 12 are horizontally positioned at both ends of the duct 11 and work together. The heat exchanger 12 is also connected to heat exchange pipes, including a heat exchange inlet pipe 13 and a heat exchange outlet pipe 14.

[0053] Optionally, the heat exchanger 12 can be tubular or plate type. The heat exchange inlet pipe 13 and the heat exchange outlet pipe 14 can be connected to the low-temperature heat source at the user end. The hot air generated during the heat release process of the controllable heat storage and release terminal can contact the low-temperature heat source at the user end through the heat exchange inlet pipe 13 and achieve heat exchange. After the hot air is cooled down, it flows out from the heat exchange outlet pipe 14 and re-enters the air duct 11 through the heat exchanger 12.

[0054] During operation, the controllable heat storage and release terminal based on microwave heating receives instructions from the central control system and performs heat storage or heat release according to the dynamic power distribution scheme of microwave heating.

[0055] Specifically, the operation of a microwave-heated controllable heat storage and release terminal consists of three processes: microwave emission, heat storage, and heat release.

[0056] In the microwave emission process, microwave generator 1 emits microwaves, which first enter the waveguide branch and then enter the waveguide 3 connected to it. The microwaves are emitted through the opening of the waveguide 3 and enter the heated area, that is, to heat the heat storage material 6 on the outer layer of the hollow pipe 8.

[0057] During the heat storage process, the controllable opener 9 is closed, and the microwaves emitted from the opening of the waveguide 3 directly enter or are reflected into the heat storage material 6, thereby storing heat by heating it. The insulation material controls the heat from being lost. At the same time, the microwave heating power entering each branch can be selected according to the heating demand to meet different grid dispatch and heating needs.

[0058] During the heat release process, the controllable opener 9 is opened, and the circulating fan 10 controls the cold air to be blown into the interior of the heat storage cavity through the air duct 11, and flows inside the hollow pipe or on the surface of the heat storage material 6; after flowing through the heat storage area, it becomes hot air through heat exchange, and then flows through the heat exchanger 12. The heat exchange inlet pipe 13 is introduced with a low temperature heat source (such as room temperature water or room temperature steam), and after heat exchange with the hot air, it flows out from the heat exchange outlet pipe 14. The controllable opener 9 can control the orderly release of heat.

[0059] Specifically, when the electricity price is negative (<0 yuan / kWh), the controllable switch 9 is completely closed, the microwave brancher 2 channels are fully open, and the microwave power is controlled within the range of 95%-100%, allowing the entire controllable heat storage and release terminal to store heat at full power. When the electricity price is in off-peak hours (0-0.3 yuan / kWh), the controllable switch 9 is partially open, the microwave brancher 2 openings are partially closed, and the microwave power is controlled within the range of 70%-90%, allowing the controllable heat storage and release terminal to store heat at medium power and release heat at low power. When the electricity price is at its lowest (0.3-0.8 yuan / kWh), most of the controllable switch 9 is open and most of the microwave brancher 2 is closed, controlling the microwave power range to 30%-50%. The controllable heat storage and release terminal stores heat at low power and releases heat at medium power. However, when the electricity price reaches its peak (>0.8 yuan / kWh), all of the controllable switch 9 is open and all of the microwave branchers 2 are closed. The microwave power drops to 0, and the controllable heat storage and release terminal stops storing heat and releases heat at full power to provide energy, thus achieving the best return.

[0060] In addition, in this embodiment, the heat storage material 6 is a phase change heat storage material, specifically a Na2CO3-K2CO3-based composite material; it is heated using microwave heating. Figure 3 It can be seen that by heating 175g of phase change thermal storage material 6 with microwaves, it only takes 30 minutes to reach 650℃ from room temperature. Compared with the traditional resistance heating heating rate of no more than 10℃ / min, the average heating rate of microwave heating can reach 20℃ / min, which greatly improves the efficiency of thermal energy storage.

[0061] Example 2

[0062] A controllable heat storage and release method based on microwave heating, using a controllable heat storage and release device based on microwave heating as described in Example 1, includes the following steps:

[0063] Collect data information, including real-time electricity price information, meteorological information, renewable energy output information, real-time heat / electricity load data, and seasonal information;

[0064] Based on real-time electricity price information, meteorological information, and renewable energy output information, a predicted electricity price curve is obtained using a trained electricity price prediction model;

[0065] Based on real-time heat / electricity load data and seasonal information, the predicted user heat / electricity demand curve is obtained using a trained load forecasting model.

[0066] Based on the predicted electricity price curve and the predicted user heat / electricity demand curve, an objective function is constructed to minimize the difference between the total electricity purchase price and the total electricity sales price. The objective function is solved, and the dynamic power allocation scheme for microwave heating is determined based on the solution results.

[0067] According to the microwave heating dynamic power distribution scheme, a controllable heat storage and release terminal based on microwave heating is used for heat storage or heat release.

[0068] By employing the above technical solution, real-time electricity price information, meteorological information, renewable energy output information, real-time heat / electricity load data, and seasonal information are used to predict the electricity price curve and user heat / electricity demand curve. From an economic perspective, the microwave dynamic power allocation scheme is optimized using the predicted electricity price curve and user heat / electricity demand curve. This improves the matching degree between the microwave heating dynamic power allocation scheme and actual demand, and enhances the effectiveness and reliability of power grid dispatch. Using a controllable heat storage and release terminal based on microwave heating for heat storage or release helps to improve the response speed of power grid dispatch and reduce energy loss.

[0069] S1. Collect data information.

[0070] Collect real-time electricity price information, meteorological information, renewable energy output information, real-time heat / electricity load data, and seasonal information within the power grid coverage area.

[0071] S2. Based on real-time electricity price information, meteorological information, and renewable energy output information, obtain the predicted electricity price curve using a trained electricity price prediction model.

[0072] The electricity price prediction model is an improved LSTM (Long Short-Term Memory) neural network model. Real-time electricity price information, meteorological information, and renewable energy output information are input into the improved LSTM neural network model. The model uses time-series features to capture the fluctuation of electricity prices over time and outputs the predicted electricity price curve for the next 24 hours, especially negative electricity prices.

[0073] The improved LSTM model is mainly optimized from the input electricity price side, and a fluctuation-sensitive gating mechanism is added to improve the accuracy of electricity price prediction, as detailed below:

[0074] The electricity price λ is calculated according to the following formula. t Optimized into the differential feature vector of electricity price:

[0075] λ′ t =λ t -λ (t-1) ;

[0076] λ″ t =λ′ t -λ′ (t-1) ;

[0077] Where, λ t Let λ' be the electricity price at time t. t Let λ be the first difference of the electricity price at time t. t Let be the second difference of the electricity price at time t. The eigenvector of the electricity price difference is (λ). t， λ' t， λ” t This is used as the input to the improved LSTM neural network model.

[0078] In addition, a gating mechanism sensitive to electricity price fluctuations was added, and the forget gate was optimized:

[0079] f t =Δ(w f ·[h (t-1) ,x t ]+b f +γ·λ′ t |);

[0080] Among them, f t The output is the forget gate output, Δ is the activation function, and in this embodiment, the activation function is the sigmoid function. Depending on the actual situation, the activation function can also be set to the tanh function or other functions. f For the forget gate weight, b f For the forget gate bias, h (t-1) x is the hidden state from the previous moment. t Let be the differential feature vector of the current input electricity price, γ be the fluctuation sensitivity factor (0.1-0.3), and |λ' t | represents the absolute value of the change in electricity price at the current moment. Preferably, in this embodiment, γ is taken as 0.2.

[0081] Therefore, when electricity prices fluctuate significantly, the ability to reset the forget gate is enhanced, enabling the model to forget the old state more quickly and respond rapidly.

[0082] The traditional 8-hour peak, 8-hour off-peak, and 8-hour low-peak electricity consumption pattern has changed. Time-of-use pricing has emerged in many areas, and electricity prices are fluctuating more frequently, even experiencing negative prices. The improved LSTM neural network model is trained using historical electricity price information, meteorological information, and renewable energy output information, along with corresponding 24-hour future electricity price curves. This embodiment uses the improved LSTM neural network model to predict electricity price curves. By adding inputs reflecting the differential characteristics of fluctuating electricity prices and a gating mechanism, the LSTM neural network model is more sensitive to electricity price fluctuations, can quickly capture price changes, and achieves higher accuracy in electricity price prediction.

[0083] S3. Based on real-time heat / electricity load data and seasonal information, obtain the predicted user heat / electricity demand curve using the trained load forecasting model.

[0084] The load forecasting model is a convolutional neural network model. During the model training phase, the training set consists of historical user heat / electricity load data and seasonal information, along with the corresponding user heat / electricity demand curves for the next 24 hours. In use, real-time heat / electricity load data and seasonal information are input into the trained load forecasting model to obtain the predicted 24-hour user heat / electricity demand curves.

[0085] By using a convolutional neural network model, the predicted user heat / electricity demand curves can be obtained with less computation, which is less prone to overfitting and ensures the effectiveness of the obtained predicted user heat / electricity demand curves.

[0086] S4. Based on the predicted electricity price curve and the predicted user heat / electricity demand curve, construct an objective function with the goal of minimizing the difference between the total electricity purchase price and the total electricity sales price, solve the objective function, and determine the dynamic power allocation scheme for microwave heating based on the solution results.

[0087] The objective function is: min∑[C buy(t) ×P buy(t) -C sell(t) ×P sell(t) ];

[0088] Among them, C buy(t) For the electricity purchase price, P buy(t) For the purchased power capacity, C sell(t) For electricity / heat sales price, P sell(t) This refers to the power / heat output sold.

[0089] By solving the objective function, the optimal benefit is obtained while ensuring safety and meeting the needs. Then, a dynamic power allocation scheme for microwave heating is determined based on the decision results.

[0090] When the electricity price is in a negative period (<0 yuan / kWh), the demand for heat application is often at a low point. At this time, to maximize the benefits of heat storage, the microwave power in the controllable heat storage and release terminal based on microwave heating is controlled within the range of 95%-100%, and the entire controllable heat storage and release terminal is fully powered for heat storage.

[0091] When the electricity price is in off-peak hours (0-0.3 yuan / kWh), economical heat storage is often pursued during periods of low application heat demand. The microwave power range in the controllable heat storage and release terminal based on microwave heating is controlled to be 70%-90%. The controllable heat storage and release terminal stores heat at medium power and releases heat at low power.

[0092] When the electricity price is in a flat period (0.3-0.8 yuan / kWh), the demand for heat increases. At this time, the basic heat load is maintained, and the microwave power in the controllable heat storage and release terminal based on microwave heating is controlled within the range of 30%-50%. The controllable heat storage and release terminal stores heat at low power and releases heat at medium power.

[0093] When electricity prices reach peak levels (>0.8 yuan / kWh), the application of heat peaks often requires the use of thermal storage devices to release heat. The microwave power in the controllable heat storage and release terminal based on microwave heating is reduced to 0, and the controllable heat storage and release terminal stops storing heat and releases heat at full capacity to supply energy, thereby obtaining the best benefits.

[0094] In addition, in special circumstances, such as increased heat demand at a certain moment, the microwave power range of the controllable heat storage and release terminal based on microwave heating can be dynamically adjusted to dynamically control heat storage or release.

[0095] S5. According to the microwave heating dynamic power distribution scheme, a controllable heat storage and release terminal based on microwave heating is used for heat storage or heat release.

[0096] This embodiment employs a controllable heat storage and release method based on microwave heating. By accurately predicting future electricity prices and user-end heat / electricity demand, the power grid can be rationally dispatched. In cases of power surplus, heat storage is performed, converting electrical energy into microwave energy. This microwave energy, combined with heat storage materials, achieves the conversion and storage of electricity into heat. During the heat release phase, the heat energy in the storage materials is released to meet user heating needs. Combining microwave heating technology with heat storage materials not only enables rapid heating and shortens grid dispatch response time but also ensures controllability of heat storage and release. Especially when integrated with electricity price information and user heat / electricity demand, it contributes to controllable power consumption and efficient, stable heat supply.

[0097] Example 3

[0098] This embodiment is an application example of the controllable heat storage and release device based on microwave heating in Embodiment 1.

[0099] A factory involves the production of multiple products using various processes, each with different heat usage temperatures and times, placing higher demands on the flexibility of its heating equipment. The controllable heat storage and release device provided in Example 1 is an excellent choice.

[0100] Specifically, this factory can produce various products such as acrylic acid, ethylene glycol, and polyamide. Different products require different amounts of heat for production. For example, acrylic acid requires a reaction temperature of around 90°C, while ethylene glycol requires 190-220°C, and polyamide requires 200-300°C. Furthermore, the overall heat requirements for producing acrylic acid, ethylene glycol, and polyamide also differ, and traditional equipment cannot meet these diverse needs. However, by using the controllable heat storage and release device provided in Example 2, heat can be released in a controlled manner according to different heat energy requirements, meeting the needs while avoiding the loss of stored heat.

[0101] As can be seen, the controllable heat storage and release device based on microwave heating provided in Example 1 can promote the electrification of the industrial field, realize the optimized configuration of production processes and equipment, provide different heat energy for the production of various products, and realize industrial integration.

[0102] In the description of this specification, the references to terms such as "an embodiment," "an example," "an example," and "a specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A controllable heat storage and release device based on microwave heating, characterized in that, include: A microwave heating unit is used to convert input electrical energy into microwave energy and control the amount of microwave energy released. The microwave heating unit includes a microwave generator (1), a waveguide (3), and a microwave splitter (2); the waveguide (3) is a waveguide or a slot antenna; the outlet of the microwave generator (1) is connected to the microwave splitter (2); the outlet of the microwave splitter (2) is connected to the waveguide (3). The heat storage and release unit is used to heat the heat storage material (6) with microwave energy during heat storage and to release and output the heat energy in the heat storage material (6) during heat release.

2. The controllable heat storage and release device based on microwave heating according to claim 1, characterized in that, The outlet of the microwave generator (1) is connected to the microwave splitter (2) via a waveguide connector; the outlet of the microwave splitter (2) is connected to the waveguide (3) via a waveguide connector.

3. The controllable heat storage and release device based on microwave heating according to claim 2, characterized in that, The waveguide connector is a flow-resistant sleeve type connector.

4. The controllable heat storage and release device based on microwave heating according to claim 1, characterized in that, The controllable heat storage and release device also includes a housing (4), the waveguide (3) and the microwave brancher (2) are both located inside the housing (4), and the main body of the microwave generator (1) is located outside the housing (4); The heat storage and release unit is located inside the shell (4) and is connected to the outside of the shell (4).

5. The controllable heat storage and release device based on microwave heating according to claim 1, characterized in that, The heat storage and release unit includes a heat storage cavity and an external heat exchange unit; The heat storage cavity is provided with a hollow pipe (8); the heat storage material (6) is placed on the outer layer of the hollow pipe (8), and the heat storage material (6) is arranged in conjunction with the microwave heating unit; The external heat exchange unit includes an air duct (11); the air duct (11) can be connected to the hollow pipe (8).

6. The controllable heat storage and release device based on microwave heating according to claim 5, characterized in that, The hollow pipeline (8) is arranged in multiple layers inside the heat storage cavity; The hollow pipe (8) is a hollow tubular structure, and both ends of the hollow pipe (8) are equipped with controllable openers (9).

7. The controllable heat storage and release device based on microwave heating according to claim 5, characterized in that, The heat storage material (6) is a sensible heat storage material or a phase change heat storage material.

8. The controllable heat storage and release device based on microwave heating according to claim 5, characterized in that, The heat storage cavity is equipped with a temperature sensor (7) and a heat insulation layer (5); the heat insulation layer (5) is disposed on the inner wall of the heat storage cavity.

9. The controllable heat storage and release device based on microwave heating according to claim 5, characterized in that, The external heat exchange unit also includes a circulating fan (10) and a heat exchanger (12); the heat exchanger (12) and the circulating fan (10) are both located in the air duct (11), and the circulating fan (10) and the heat exchanger (12) are distributed on both sides of the air duct (11) and cooperate with each other.

10. The controllable heat storage and release device based on microwave heating according to claim 9, characterized in that, The heat exchanger (12) is connected to a heat exchange pipe, which includes a heat exchange inlet pipe (13) and a heat exchange outlet pipe (14).

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