Distributed integrated energy system
By designing a distributed integrated energy system in an industrial park with self-use power generation, the power generated by photovoltaic power generation is converted into thermal energy, and the reaction gas required for fuel cells is preheated, the large energy consumption and energy utilization rate of the industrial park are solved. High problems achieve all-weather energy utilization and cost savings.
Patent Information
- Application Number
- CN202310981505.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-04
- Publication Date
- 2025-02-14
AI Technical Summary
In industrial parks with self-use power generation, when using fuel cell systems to generate power, there is a problem of large energy consumption in the industrial park and low overall energy utilization rate.
Design a distributed integrated energy system, including photovoltaic power generation devices, solid electric heat storage devices, electric heat storage heat exchangers and fuel cells. By converting the electrical energy generated by photovoltaic power generation into thermal energy, it is stored in a solid electric heat storage device, and using this thermal energy to preheat the reaction gas required by the fuel cell, all-weather preheating of the reaction gas is achieved.
Improve energy utilization, realize continuous preheating of the reaction gas required for fuel cells around the clock, avoid the need for additional heating equipment, simplify the structure, save costs, and make full use of the photovoltaic power generation devices generated in industrial parks Electricity.
Smart Images
Figure CN119447360A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of energy utilization, and in particular, to a distributed integrated energy system. Background Art
[0002] In the distributed integrated energy system under the background of dual carbon, especially in industrial parks that generate electricity for their own use, the adoption of zero-carbon methods is the future trend of power generation. Among them, fuel cell systems have gradually attracted attention and favor due to their high energy utilization rate and zero carbon emissions. However, when industrial parks that generate electricity for their own use use fuel cell systems for power generation, there are problems such as large energy consumption in the industrial park and low overall energy utilization. Summary of the invention
[0003] The purpose of the present disclosure is to provide a distributed integrated energy system, which can improve energy utilization.
[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a distributed integrated energy system, which includes a photovoltaic power generation device, a solid electric heat storage device, an electric heat storage heat exchanger and a fuel cell. The solid electric heat storage device is electrically connected to the photovoltaic power generation device to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the solid electric heat storage device, and the other part is used to heat the electric heat storage heat exchange gas flowing through the solid electric heat storage device. The solid electric heat storage device and the fuel cell are respectively connected to the electric heat storage heat exchanger, so that the heated electric heat storage heat exchange gas and the reaction gas required by the fuel cell are heat exchanged in the electric heat storage heat exchanger, and the reaction gas after heat exchange is introduced into the fuel cell; wherein a fan is provided between the electric heat storage heat exchanger and the solid electric heat storage device, and the fan is used to drive the electric heat storage heat exchange gas to circulate between the electric heat storage heat exchanger and the solid electric heat storage device.
[0005] Optionally, the solid electric heat storage device includes a first electric heat storage device, the electric heat storage heat exchanger includes a first heat exchanger, the fan includes a first fan, the electric heat storage heat exchange gas includes a first heat exchange gas, the reaction gas includes an anode reaction gas, the first electric heat storage device is electrically connected to the photovoltaic power generation device to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the first electric heat storage device, and the other part is used to heat the first heat exchange gas flowing through the first electric heat storage device, the first electric heat storage device and the anode chamber of the fuel cell are respectively connected to the first heat exchanger, so that the heated first heat exchange gas and the anode reaction gas required by the fuel cell are heat exchanged in the first heat exchanger, and the anode reaction gas after heat exchange is introduced into the anode chamber; wherein, the first fan is arranged between the first heat exchanger and the first electric heat storage device, and the first fan is used to drive the first heat exchange gas to circulate between the first heat exchanger and the first electric heat storage device.
[0006] Optionally, the distributed integrated energy system further includes a first pipeline, one end of which is arranged between the first fan and the first electric heat storage device, and the other end of which is arranged between the first electric heat storage device and the first heat exchanger.
[0007] Optionally, the solid electric heat storage device includes a second electric heat storage device, the electric heat storage heat exchanger includes a second heat exchanger, the fan includes a second fan, the electric heat storage heat exchange gas includes a second heat exchange gas, the reaction gas includes a cathode reaction gas, the second electric heat storage device is electrically connected to the photovoltaic power generation device to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the second electric heat storage device, and the other part is used to heat the second heat exchange gas flowing through the second electric heat storage device, the second electric heat storage device and the cathode chamber of the fuel cell are respectively connected to the second heat exchanger, so that the heated second heat exchange gas and the cathode reaction gas required by the fuel cell are heat exchanged in the second heat exchanger, and the cathode reaction gas after heat exchange is introduced into the cathode chamber; wherein, the second fan is arranged between the second heat exchanger and the second electric heat storage device, and the second fan is used to drive the second heat exchange gas to circulate between the second heat exchanger and the second electric heat storage device.
[0008] Optionally, the distributed integrated energy system includes a second pipeline, one end of which is arranged between the second fan and the second electric heat storage device, and the other end of which is arranged between the second electric heat storage device and the second heat exchanger.
[0009] Optionally, the distributed integrated energy system also includes a solid heat storage device and a heat storage heat exchanger, the solid heat storage device is connected to the outlet of the fuel cell to store the thermal energy of the exhaust gas from the fuel cell in the solid heat storage device, the solid heat storage device and the heat storage heat exchanger are connected so that the heat storage heat exchange medium flowing through the solid heat storage device exchanges heat with the heat supply medium from the heat user in the heat storage heat exchanger, and the heat supply medium after heat exchange is passed to the heat user; wherein a power device is arranged between the heat storage heat exchanger and the solid heat storage device, and the power device is used to drive the heat storage heat exchange medium to circulate between the heat storage heat exchanger and the solid heat storage device.
[0010] Optionally, the distributed integrated energy system also includes a burner, which is respectively connected to the outlet of the fuel cell and the solid heat storage device, so that the exhaust gas discharged from the fuel cell is passed into the burner for combustion, and the heat energy of the exhaust gas after combustion is stored in the solid heat storage device.
[0011] Optionally, the power device is configured as a third fan, and the thermal storage heat exchange medium is a third heat exchange gas; or, the power device is configured as a water pump, and the thermal storage heat exchange medium is hot water; or, the power device is configured as an oil pump, and the thermal storage heat exchange medium is heat exchange oil.
[0012] Optionally, the solid heat storage device includes a heat storage body, a heat storage channel and a heat release channel, the heat storage channel and the heat release channel are independent of each other and are respectively arranged through the heat storage body, and the heat storage channel is connected to the outlet of the fuel cell.
[0013] Optionally, the heat storage channel includes a heat storage inlet and a heat storage outlet, the heat release channel includes a heat release inlet and a heat release outlet, and the solid heat storage device has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; in the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; wherein the heat storage process and the heat release process are performed synchronously or sequentially.
[0014] Through the above technical scheme, in the distributed integrated energy system provided by the present disclosure, electricity is generated by utilizing a photovoltaic power generation device, and a portion of the electricity is converted into heat energy and stored in a solid electric heat storage device, and the other portion is used to heat the electric heat storage heat exchange gas flowing through the solid electric heat storage device, and the heated electric heat storage heat exchange gas exchanges heat with the reaction gas required by the fuel cell in the electric heat storage heat exchanger, and the reaction gas after heat exchange is introduced into the fuel cell, so that when the photovoltaic power generation device is generating electricity normally, this portion of heat energy directly converted from electricity is used to meet the preheating of the reaction gas required by the fuel cell under normal circumstances, and when it is dark, rainy, or other situations where photovoltaic power generation cannot be achieved, another portion of heat energy stored in the solid electric heat storage device is used to meet the preheating of the reaction gas required by the fuel cell in this situation, so that the distributed integrated energy system can achieve continuous preheating of the reaction gas required by the fuel cell around the clock. The distributed integrated energy system here can be applied to industrial parks, and the electric energy used to heat the solid electric heat storage device can be the surplus electricity from the photovoltaic power generation device of the industrial park. This can not only avoid adding additional heating equipment, simplify the structure and save costs, but also make full use of the electric energy generated by the photovoltaic power generation device of the industrial park, thereby improving the overall energy utilization rate of the industrial park.
[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0017] Figure 1 is a schematic diagram of the structure of the distributed integrated energy system disclosed in the present invention;
[0018] Figure 2 is a schematic diagram of the structure of a solid heat storage device in a distributed integrated energy system disclosed in the present invention;
[0019] Figure 3 It is another structural schematic diagram of the solid heat storage device in the distributed integrated energy system disclosed in the present invention.
[0020] Description of Reference Numerals
[0021] 1-photovoltaic power generation device; 2-fuel cell; 3-solid electric heat storage device; 31-first electric heat storage device; 32-second electric heat storage device; 4-electric heat storage heat exchanger; 41-first heat exchanger; 42-second heat exchanger; 5-fan; 51-first fan; 52-second fan; 6-first pipeline; 7-second pipeline; 8-solid heat storage device; 81-heat storage body; 82-heat storage channel; 83-heat release channel; 9-heat storage heat exchanger; 10-power device; 11-burner. DETAILED DESCRIPTION
[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0023] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to "inside" and "outside" relative to the corresponding component's own contour. In addition, the terms "first", "second", "third", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.
[0024] The present invention provides a distributed integrated energy system. Figure 1 As shown in, the distributed integrated energy system includes a photovoltaic power generation device 1, a solid electric heat storage device 3, an electric heat storage heat exchanger 4 and a fuel cell 2. The solid electric heat storage device 3 is electrically connected to the photovoltaic power generation device 1 to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the solid electric heat storage device 3, and the other part is used to heat the electric heat storage heat exchange gas flowing through the solid electric heat storage device 3. The solid electric heat storage device 3 and the fuel cell 2 are respectively connected to the electric heat storage heat exchanger 4 so that the heated electric heat storage heat exchange gas and the reaction gas required by the fuel cell 2 are heat exchanged in the electric heat storage heat exchanger 4, and the reaction gas after heat exchange is introduced into the fuel cell 2; wherein, a fan 5 is arranged between the electric heat storage heat exchanger 4 and the solid electric heat storage device 3, and the fan 5 is used to drive the electric heat storage heat exchange gas to circulate between the electric heat storage heat exchanger 4 and the solid electric heat storage device 3.
[0025] Through the above technical scheme, in the distributed integrated energy system provided by the present disclosure, the photovoltaic power generation device 1 is used to generate electric energy, and the electric energy is converted into heat energy, a part of which is stored in the solid electric heat storage device 3, and the other part is used to heat the electric heat storage heat exchange gas flowing through the solid electric heat storage device 3, and the heated electric heat storage heat exchange gas is heat-exchanged with the reaction gas required by the fuel cell 2 in the electric heat storage heat exchanger 4, and the reaction gas after heat exchange is introduced into the fuel cell 2, so that the photovoltaic power generation device 1 can use this part of the heat energy directly converted from electric energy to meet the preheating of the reaction gas required by the fuel cell 2 under normal circumstances when generating electricity normally, and when it is dark, rainy, or other situations where photovoltaic power generation cannot be achieved, another part of the heat energy stored in the solid electric heat storage device 3 is used to meet the preheating of the reaction gas required by the fuel cell 2 in this situation. In this way, the distributed integrated energy system can realize continuous preheating of the reaction gas required by the fuel cell 2 around the clock. Here, the distributed integrated energy system can be applicable to any suitable application scenario, and the present disclosure does not impose any restrictions on this. By way of example, the distributed integrated energy system can be applicable to an industrial park, and the electric energy used to heat the solid electric heat storage device 3 can be the surplus electricity from the photovoltaic power generation device 1 of the industrial park. This can not only avoid adding additional heating equipment, simplify the structure, and save costs, but also make full use of the electric energy generated by the photovoltaic power generation device 1 of the industrial park, thereby improving the overall energy utilization rate of the industrial park.
[0026] It should be noted that the reaction temperature of the above-mentioned fuel cell 2 is greater than 800° C., the working efficiency is greater than 90%, and the concentration of hydrogen gas introduced into the anode chamber of the fuel cell 2 is greater than 90%.
[0027] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the solid electric heat storage device 3 includes a first electric heat storage device 31, the electric heat storage heat exchanger 4 includes a first heat exchanger 41, the fan 5 includes a first fan 51, the electric heat storage heat exchange gas includes a first heat exchange gas, the reaction gas includes an anode reaction gas, the first electric heat storage device 31 is electrically connected to the photovoltaic power generation device 1, so as to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the first electric heat storage device 31, and the other part is used to heat the first heat exchange gas flowing through the first electric heat storage device 31, and the first electric heat storage device 31 and the anode chamber of the fuel cell 2 are respectively connected to the first heat exchanger 41, so that the heated first heat exchange gas and the anode reaction gas required by the fuel cell 2 are heat exchanged in the first heat exchanger 41, and the anode reaction gas after heat exchange is introduced into the anode chamber; wherein the first fan 51 is arranged between the first heat exchanger 41 and the first electric heat storage device 31, and the first fan 51 is used to drive the first heat exchange gas to circulate between the first heat exchanger 41 and the first electric heat storage device 31.
[0028] Specifically, the first electric heat storage device 31 includes a first air inlet and a first air outlet, the first air inlet is connected to the shell side outlet of the first heat exchanger 41, the first fan 51 is arranged between the shell side outlet of the first heat exchanger 41 and the first air inlet, and the first air outlet is connected to the shell side inlet of the first heat exchanger 41, and the anode reaction gas supplied to the anode chamber of the fuel cell 2 is passed into the tube side of the first heat exchanger 41 to exchange heat with the first heat exchange gas passed into the shell side of the first heat exchanger 41, and the anode reaction gas after heat exchange is passed into the anode chamber of the fuel cell 2. Through such an arrangement, the heat energy converted from the electric energy generated by the photovoltaic power generation device 1 can be used as the fuel cell 2, and because the electric energy generated by photovoltaic power generation needs to be converted into heat energy in the first electric heat storage device 31 to preheat the anode reaction gas, the heat energy generated by the first electric heat storage device 31 can be directly used to maintain the preheating of the anode reaction gas required by the anode chamber under normal circumstances such as sunny days, and on the other hand, the stored part of the heat energy can meet the preheating of the anode reaction gas required by the anode chamber in rainy days and other situations where photovoltaic power generation cannot be achieved. In this way, the distributed integrated energy system provided by the present invention can achieve the preheating of the anode reaction gas required by the anode chamber under all-weather conditions.
[0029] It should be noted that the above-mentioned anode reaction gas can be hydrogen, and the first heat exchange gas can be an inert gas, such as nitrogen, argon or helium. In addition, the first electric heat storage device 31 can be heated by a metal heating element, such as an iron-chromium-aluminum heating wire. An insulating pipe is arranged inside the first electric heat storage device 31, wherein the insulating pipe can be a pipe with a circular or square cross-section, the wall thickness of the insulating pipe is less than 10mm, the temperature resistance is greater than or equal to 1300°C, and a temperature measuring point is arranged inside, and the heat storage temperature is greater than or equal to 950°C. Exemplarily, the first electric heat storage device 31 here can be a heat storage electric boiler. In addition, the first heat exchanger 41 is made of a high temperature resistant material, such as 310S, in which the heat exchange method adopts gas-to-gas heat exchange, and fins are used on the side with a small heat exchange coefficient. In addition, the first fan 51 can be constructed as a centrifugal fan, and the temperature resistance is greater than 200°C.
[0030] In the specific embodiments provided in the present disclosure, reference is made to Figure 1As shown, in order to adjust the temperature of the first heat exchange gas entering the first heat exchanger 41 according to the use requirements, the distributed integrated energy system can be set to also include a first pipeline 6, one end of the first pipeline 6 is arranged between the first fan 51 and the first electric heat storage device 31, and the other end is arranged between the first electric heat storage device 31 and the first heat exchanger 41. Specifically, one end of the first pipeline 6 is arranged between the first fan 51 and the first air inlet, and the other end is arranged between the first air outlet and the shell inlet of the first heat exchanger 41. Through such a setting, the proportion of the first heat exchange gas flowing through the first electric heat storage device 31 entering the first heat exchanger 41 can be adjusted, thereby realizing flexible preheating of the anode reaction gas required for the anode chamber.
[0031] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the solid electric heat storage device 3 includes a second electric heat storage device 32, the electric heat storage heat exchanger 4 includes a second heat exchanger 42, the fan 5 includes a second fan 52, the electric heat storage heat exchange gas includes a second heat exchange gas, the reaction gas includes a cathode reaction gas, the second electric heat storage device 32 is electrically connected to the photovoltaic power generation device 1, so as to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the second electric heat storage device 32, and the other part is used to heat the second heat exchange gas flowing through the second electric heat storage device 32, and the cathode chamber of the second electric heat storage device 32 and the fuel cell 2 are respectively connected to the second heat exchanger 42, so that the heated second heat exchange gas and the cathode reaction gas required by the fuel cell 2 are heat exchanged in the second heat exchanger 42, and the cathode reaction gas after heat exchange is introduced into the cathode chamber; wherein the second fan 52 is arranged between the second heat exchanger 42 and the second electric heat storage device 32, and the second fan 52 is used to drive the second heat exchange gas to circulate between the second heat exchanger 42 and the second electric heat storage device 32.
[0032] Specifically, the second electric heat storage device 32 includes a second air inlet and a second air outlet, the second air inlet is connected to the shell side outlet of the second heat exchanger 42, a second fan 52 is arranged between the shell side outlet of the second heat exchanger 42 and the second air inlet, the second air outlet is connected to the shell side inlet of the second heat exchanger 42, the cathode reaction gas is introduced into the tube side of the second heat exchanger 42 to exchange heat with the second heat exchange gas introduced into the shell side of the second heat exchanger 42, and the cathode reaction gas after heat exchange is introduced into the cathode chamber of the fuel cell 2. Through such an arrangement, the heat energy converted from the electric energy generated by the photovoltaic power generation device 1 can be used as the heat energy required by the cathode chamber of the fuel cell 2. The cathode reaction gas is preheated, and because the electric energy generated by photovoltaic power generation needs to be converted into thermal energy in the second electric heat storage device 32 to preheat the cathode reaction gas, the thermal energy generated in the second electric heat storage device 32 can be directly used to maintain the preheating of the cathode reaction gas required for the cathode chamber under normal circumstances such as sunny daytime, and on the other hand, the stored part of the thermal energy can meet the preheating of the cathode reaction gas required for the cathode chamber in rainy days and other situations where photovoltaic power generation cannot be achieved. In this way, the distributed integrated energy system provided by the present invention can achieve the preheating of the cathode reaction gas required for the cathode chamber under all-weather conditions.
[0033] It should be noted that the cathode reaction gas mentioned above can be air, and the second heat exchange gas can be an inert gas, such as nitrogen, argon or helium. In addition, the second electric heat storage device 32 can be heated by a metal heating element, such as an iron-chromium-aluminum heating wire. An insulating pipe is arranged inside the second electric heat storage device 32, wherein the insulating pipe can be a pipe with a circular or square cross-section, the wall thickness of the insulating pipe is less than 10 mm, the temperature resistance is greater than or equal to 1300°C, and a temperature measuring point is arranged inside, and the heat storage temperature is greater than or equal to 950°C. Exemplarily, the second electric heat storage device 32 here can be a heat storage electric boiler. In addition, the second heat exchanger 42 is made of a high temperature resistant material, such as 310S, in which the heat exchange method adopts gas-to-gas heat exchange, and fins are used on the side with a small heat exchange coefficient. In addition, the second fan 52 can be constructed as a centrifugal fan, and the temperature resistance is greater than 200°C.
[0034] In the specific embodiments provided in the present disclosure, reference is made to Figure 1As shown, in order to be able to adjust the temperature of the second heat exchange gas entering the second heat exchanger 42 according to actual needs, the distributed integrated energy system also includes a second pipeline 7, one end of the second pipeline 7 is arranged between the second fan 52 and the second electric heat storage device 32, and the other end is arranged between the second electric heat storage device 32 and the second heat exchanger 42. Specifically, one end of the second pipeline 7 is arranged between the second fan 52 and the second air inlet, and the other end is arranged between the second air outlet and the shell inlet of the second heat exchanger 42. Through such an arrangement, the proportion of the second heat exchange gas flowing through the second electric heat storage device 32 entering the second heat exchanger 42 can be adjusted, thereby realizing flexible preheating of the cathode reaction gas required for the cathode chamber.
[0035] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the distributed integrated energy system also includes a solid heat storage device 8 and a heat storage heat exchanger 9. The solid heat storage device 8 is connected to the outlet of the fuel cell 2 to store the heat energy of the exhaust gas from the fuel cell 2 in the solid heat storage device 8. The solid heat storage device 8 and the heat storage heat exchanger 9 are connected so that the heat storage heat exchange medium flowing through the solid heat storage device 8 exchanges heat with the heat supply medium from the heat user in the heat storage heat exchanger 9, and the heat supply medium after heat exchange is passed to the heat user; wherein, a dynamic heat storage device 8 is provided between the heat storage heat exchanger 9 and the solid heat storage device 8. The power device 10 is used to drive the heat storage heat exchange medium to circulate between the heat storage heat exchanger 9 and the solid heat storage device 8. Through such a setting, the thermal energy of the exhaust gas of the fuel cell 2 can be fully utilized to provide heat to the heat users. Among them, since the thermal energy of the exhaust gas from the fuel cell 2 needs to pass through the solid heat storage device 8 and then be supplied to the heat user, and the solid heat storage device 8 can store the thermal energy of this part of the exhaust gas, the distributed integrated energy system disclosed in the present invention can be flexibly supplied according to the actual heating needs of the users.
[0036] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the distributed integrated energy system also includes a burner 11, which is connected to the outlet of the fuel cell 2 and the solid heat storage device 8 respectively, so that the exhaust gas discharged from the combustion cell 2 is passed into the burner 11 for combustion, and the heat energy of the exhaust gas after combustion is stored in the solid heat storage device 8.
[0037] Specifically, the exhaust gas from the fuel cell can be a mixture of unreacted anode gas and reaction products, such as a mixture of hydrogen and water vapor. The burner 11 includes a first gas inlet, a second gas inlet and an exhaust gas outlet. The first gas inlet is introduced into the outside air, and the second gas inlet is introduced into the mixture of unreacted anode gas and reaction products exhausted from the fuel cell. In this way, the mixture of unreacted anode gas and reaction products from the fuel cell is burned in the burner 11, and the exhaust gas obtained by combustion is discharged through the exhaust gas outlet. In this way, the safety hazard caused by the unreacted anode gas directly entering the solid heat storage device 8 can be avoided. The solid heat storage device 8 includes a heat storage inlet, a heat storage outlet, a heat release inlet and a heat release outlet. The heat storage inlet is connected to the exhaust gas outlet to store the heat energy of the exhaust gas after combustion, and discharge the exhaust gas after the heat energy is released through the heat storage outlet; the heat release inlet is connected to the pipe side outlet of the heat storage heat exchanger 9, and a power device 10 is arranged between the heat release inlet and the pipe side outlet of the heat storage heat exchanger 9, and the heat release outlet is connected to the pipe side inlet of the heat storage heat exchanger 9. In addition, the distributed integrated energy system also includes a heat supply inlet for supplying heat to heat users and a heat supply outlet from heat users, wherein the heat supply inlet is connected to the shell side outlet of the heat storage heat exchanger 9, and the heat supply outlet is connected to the shell side inlet of the heat storage heat exchanger 9, so that the exhaust gas after combustion can be prevented from directly entering the heat storage heat exchanger 9 to exchange heat with the heat supply medium, and the heat supply medium and the heat exchange medium flowing through the solid heat storage device 8 are heat exchanged in the heat storage heat exchanger 9, and the heat supply medium after heat exchange supplies heat to the heat user through the heat supply inlet. It can be seen that through such a setting, not only can the waste heat of the fuel cell 2 be fully utilized to meet the heat demand of the heat user, but also the safety hazard caused by the unreacted anode gas directly entering the solid heat storage device 8 can be avoided.
[0038] It should be noted that the reference Figure 2 and Figure 3As shown in , the above-mentioned solid heat storage device 8 may include a heat storage body 81, a heat storage channel 82 and a heat release channel 83, the heat storage channel 82 and the heat release channel 83 are pre-buried in the heat storage body 81 made of heat storage material, and the heat storage channel 82 and the heat release channel 83 are cross-distributed inside the heat storage body 81 and are respectively arranged through the heat storage body 81, wherein the heat storage channel 82 can be formed by stacking the heat storage body 81 made of heat storage material, and the heat storage temperature of the heat storage channel 82 is greater than or equal to 1200°C, and the heat release channel 83 can be divided into two types according to the different heat storage heat exchange media flowing inside. One is that when the heat storage heat exchange medium flowing inside the heat release channel 83 is liquid, such as water or oil, the heat release channel 83 is constructed as a metal pipe; the other is that when the heat storage heat exchange medium flowing inside the heat release channel 83 is gas, such as air or inert gas, the heat release channel 83 is stacked by the heat storage body 81 made of heat storage material. The thermal conductivity of the heat storage material is greater than or equal to 50 W / mK, the temperature resistance is greater than or equal to 1200° C., and the strength is greater than 10 MPa. In addition, the thermal efficiency of the burner 11 is greater than or equal to 90%, and is suitable for a flow range with a high-width ratio.
[0039] In the above process, the heat storage inlet and heat storage outlet are respectively formed at opposite ends of the heat storage channel 82, while the heat release inlet and heat release outlet are respectively formed at opposite ends of the heat release channel 83. The solid heat storage device 8 has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; in the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; wherein the heat storage process and the heat release process are carried out synchronously or sequentially. Through such a setting, it is possible to flexibly select whether the solid heat storage device 8 is currently in the heat storage process and the heat release process synchronously, or in the heat storage process and the heat release process sequentially according to the actual heat demand, so as to meet different usage requirements.
[0040] In the specific embodiments provided in the present disclosure, the power device 10 may have at least the following possible embodiments:
[0041] In a first exemplary embodiment, the power device 10 may be configured as a third fan, and the thermal storage heat exchange medium may be a third heat exchange gas.
[0042] In a second exemplary embodiment, the power device 10 is configured as a water pump, and the thermal storage and heat exchange medium is hot water.
[0043] In the third exemplary embodiment, the power device 10 is configured as an oil pump, and the thermal storage and heat exchange medium is heat exchange oil.
[0044] In the above three exemplary embodiments, three common heat exchange media, namely air, water and oil, are selected respectively, and the circulation of the heat exchange medium between the heat storage heat exchanger 9 and the solid heat storage device 8 is realized by combining the power device 10 corresponding to the various heat exchange media.
[0045] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0046] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0047] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A distributed integrated energy system, characterized in that: The distributed integrated energy system comprises a photovoltaic power generation device, a solid electric heat storage device, an electric heat storage heat exchanger and a fuel cell. The solid electric heat storage device is electrically connected to the photovoltaic power generation device to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the solid electric heat storage device, and the other part is used to heat the electric heat storage heat exchange gas flowing through the solid electric heat storage device. The solid electric heat storage device and the fuel cell are respectively connected to the electric heat storage heat exchanger, so that the heated electric heat storage heat exchange gas and the reaction gas required by the fuel cell exchange heat in the electric heat storage heat exchanger, and the reaction gas after heat exchange is introduced into the fuel cell; Among them, a fan is arranged between the electric heat storage heat exchanger and the solid electric heat storage device, and the fan is used to drive the electric heat storage heat exchange gas to circulate between the electric heat storage heat exchanger and the solid electric heat storage device.
2. The distributed integrated energy system according to claim 1, characterized in that: The solid electric heat storage device includes a first electric heat storage device, the electric heat storage heat exchanger includes a first heat exchanger, the fan includes a first fan, the electric heat storage heat exchange gas includes a first heat exchange gas, the reaction gas includes an anode reaction gas, the first electric heat storage device is electrically connected to the photovoltaic power generation device to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the first electric heat storage device, and the other part is used to heat the first heat exchange gas flowing through the first electric heat storage device, the first electric heat storage device and the anode chamber of the fuel cell are respectively connected to the first heat exchanger, so that the heated first heat exchange gas and the anode reaction gas required by the fuel cell are heat exchanged in the first heat exchanger, and the anode reaction gas after heat exchange is introduced into the anode chamber; Wherein, the first fan is arranged between the first heat exchanger and the first electric heat storage device, and the first fan is used to drive the first heat exchange gas to circulate between the first heat exchanger and the first electric heat storage device.
3. The distributed integrated energy system according to claim 2, characterized in that: The distributed integrated energy system also includes a first pipeline, one end of which is arranged between the first fan and the first electric heat storage device, and the other end of which is arranged between the first electric heat storage device and the first heat exchanger.
4. The distributed integrated energy system according to claim 1, characterized in that: The solid electric heat storage device includes a second electric heat storage device, the electric heat storage heat exchanger includes a second heat exchanger, the fan includes a second fan, the electric heat storage heat exchange gas includes a second heat exchange gas, the reaction gas includes a cathode reaction gas, the second electric heat storage device is electrically connected to the photovoltaic power generation device to convert the electric energy generated by photovoltaic power generation into heat energy, a part of which is stored in the second electric heat storage device, and the other part is used to heat the second heat exchange gas flowing through the second electric heat storage device, the second electric heat storage device and the cathode chamber of the fuel cell are respectively connected to the second heat exchanger, so that the heated second heat exchange gas and the cathode reaction gas required by the fuel cell are heat exchanged in the second heat exchanger, and the cathode reaction gas after heat exchange is introduced into the cathode chamber; Wherein, the second fan is arranged between the second heat exchanger and the second electric heat storage device, and the second fan is used to drive the second heat exchange gas to circulate between the second heat exchanger and the second electric heat storage device.
5. The distributed integrated energy system according to claim 4, characterized in that: The distributed integrated energy system includes a second pipeline, one end of which is arranged between the second fan and the second electric heat storage device, and the other end of which is arranged between the second electric heat storage device and the second heat exchanger.
6. The distributed integrated energy system according to any one of claims 1 to 5, characterized in that: The distributed integrated energy system further comprises a solid heat storage device and a heat storage heat exchanger, wherein the solid heat storage device is connected to the outlet of the fuel cell so as to store the heat energy of the exhaust gas from the fuel cell in the solid heat storage device, and the solid heat storage device is connected to the heat storage heat exchanger so that the heat storage heat exchange medium flowing through the solid heat storage device exchanges heat with the heat supply medium from the heat user in the heat storage heat exchanger, and the heat supply medium after heat exchange is passed to the heat user; Wherein, a power device is arranged between the thermal storage heat exchanger and the solid thermal storage device, and the power device is used to drive the thermal storage heat exchange medium to circulate between the thermal storage heat exchanger and the solid thermal storage device.
7. The distributed integrated energy system according to claim 6, characterized in that: The distributed integrated energy system also includes a burner, which is connected to the outlet of the fuel cell and the solid heat storage device respectively, so that the exhaust gas discharged from the fuel cell is passed into the burner for combustion, and the heat energy of the exhaust gas after combustion is stored in the solid heat storage device.
8. The distributed integrated energy system according to claim 6, characterized in that: The power device is configured as a third fan, and the heat storage and heat exchange medium is a third heat exchange gas; or, The power device is configured as a water pump, and the heat storage and heat exchange medium is hot water; or, The power device is configured as an oil pump, and the heat storage and heat exchange medium is heat exchange oil.
9. The distributed integrated energy system according to claim 6, characterized in that: The solid heat storage device includes a heat storage body, a heat storage channel and a heat release channel. The heat storage channel and the heat release channel are independent of each other and are respectively arranged through the heat storage body. The heat storage channel is connected to the outlet of the fuel cell.
10. The distributed integrated energy system according to claim 9, characterized in that: The heat storage channel includes a heat storage inlet and a heat storage outlet, the heat release channel includes a heat release inlet and a heat release outlet, and the solid heat storage device has a heat storage process and a heat release process. In the heat storage process, the heat storage inlet and the heat storage outlet are opened, and the heat release inlet and the heat release outlet are closed; During the heat release process, the heat storage inlet and the heat storage outlet are closed, and the heat release inlet and the heat release outlet are opened; Wherein, the heat storage process and the heat release process are performed synchronously or sequentially.