Trough mirror field heat collection solid heat storage system and control method thereof

Abstract

The application provides a trough mirror field heat collecting solid heat storage system and a control method thereof. The control method comprises the following steps: S1, a heat exchange medium is introduced, and a solid heat storage module Ai corresponding to the temperature of the heat exchange medium is opened; S2, when the temperature of the heat exchange medium flowing out of the solid heat storage module Ai rises to a preset temperature, a solid heat storage module Ai+1 is opened; and S3, the step S2 is repeated until a solid heat storage module An is opened. According to the control method, the temperature of the heat exchange medium flowing out of the mixed structure is always stabilized in the optimal working temperature range of the heat exchange medium by controlling the temperature of the heat exchange medium flowing into each heat storage module of the mixed structure, so that the heat exchange medium can efficiently absorb solar heat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar energy utilization, and particularly relates to a control method of a trough mirror field heat collection solid heat storage system and a trough mirror field heat collection solid heat storage system controlled by the method. BACKGROUND

[0002] Currently, in the trough solar thermal power generation technology, heat conducting oil is generally used as the heat absorbing and heat transferring medium, and molten salt is used as the heat storage medium. Due to the temperature limit of the heat conducting oil, the temperature rise of the heat conducting oil in the mirror field is about 100 DEG C, and the corresponding temperature range of the molten salt is also about 100 DEG C. Compared with the temperature range of about 250-300 DEG C of the molten salt in the tower molten salt technology route, the use amount of the molten salt in the trough technology using molten salt heat storage will increase by 2.5-3 times, which greatly increases the cost of the heat storage part. In order to reduce the heat storage cost of the trough technology route, there is a scheme to replace the heat storage medium with heat conducting oil or steam, but the heat conducting oil heat storage has the disadvantages of high cost and low safety of the heat conducting oil; the steam heat storage has the disadvantages of unstable steam parameters and limited heat storage capacity. In recent years, there is a scheme to replace the molten salt with solid concrete as the heat storage medium, such as the Chinese patents with the application numbers of 201711296993.1 and 201711296993.1, which disclose a scheme for replacing the heat conducting oil or molten salt heat storage with solid heat storage for solar thermal power generation. Although the scheme solves the problems of high cost and high operation cost of the solar thermal power generation using molten salt as the heat storage medium, at the same time, the solid heat storage itself has the characteristics that the outlet temperature of the solid heat storage continuously increases with the increase of the heat storage time, which can cause the temperature of the heat transfer medium after the solid heat storage to continuously increase, the solar heat that can be absorbed after entering the mirror field to continuously decrease, and the efficiency of the mirror field to continuously decrease with the increase of the heat storage operation time. Especially when the heat storage time is long, the temperature increase of the solid heat storage outlet will be faster and faster, which can cause the rapid decrease of the mirror field efficiency. By increasing the solid heat storage configuration, the temperature increase time can be delayed to a certain extent, but the heat storage module needs to be greatly increased, and the economic efficiency will rapidly decrease. Therefore, it is urgent to solve the problem that the temperature increase of the heat transfer medium of the solid heat storage system entering the trough mirror field system can cause the solar heat absorption efficiency to decrease. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to overcome the defect that the temperature increase of the heat transfer medium of the solid heat storage system entering the trough mirror field system can cause the solar heat absorption efficiency to decrease in the prior art, so as to provide a control method of a trough mirror field heat collection solid heat storage system and a trough mirror field heat collection solid heat storage system controlled by the control method.

[0004] According to a first aspect of the present application, the present application provides a control method of a trough mirror field heat collection solid heat storage system, the trough mirror field heat collection solid heat storage system comprising a plurality of solid heat storage modules A1, A2,..., An arranged in parallel and a mixing structure, the outlets of the plurality of solid heat storage modules being connected to the mixing structure, the plurality of solid heat storage modules having different design temperatures K1, K2,..., Kn, K1 to Kn gradually decreasing, the control method comprising:

[0005] Step S1, introducing a heat exchange medium and opening a solid heat storage module Ai corresponding to the temperature of the heat exchange medium;

[0006] Step S2, opening a solid heat storage module Ai+1 when the temperature of the heat exchange medium flowing out of the solid heat storage module Ai rises to a preset temperature;

[0007] Step S3, repeating the step S2 until the solid heat storage module An is opened.

[0008] Optionally, the preset temperature is the design temperature Kn of the solid heat storage module An.

[0009] Optionally, in the steps S2 and S3, the heat exchange medium flow of the solid heat storage module Ai+1 accounts for half of the total flow.

[0010] Optionally, in the steps S2 and S3, the heat exchange medium flow of the solid heat storage module A1 to the solid heat storage module Ai is evenly distributed.

[0011] Optionally, in the steps S2 and S3, when the heat storage temperature of any solid heat storage module reaches the design temperature, the solid heat storage module is closed.

[0012] According to a second aspect of the present application, the present application provides a trough mirror field heat collection solid heat storage system controlled by the above-mentioned control method, the trough mirror field heat collection solid heat storage system comprising a trough mirror field system and a solid heat storage system, the solid heat storage system comprising a plurality of solid heat storage modules A1, A2,..., An arranged in parallel and a mixing structure, the outlets of the plurality of solid heat storage modules being connected to the mixing structure.

[0013] Optionally, the solid heat storage system comprises a plurality of inlet pipes, the plurality of inlet pipes being arranged and connected in one-to-one correspondence with the plurality of solid heat storage modules.

[0014] Optionally, each inlet pipe is provided with a switch structure.

[0015] Optionally, the solid heat storage system comprises a plurality of outlet pipes, one end of each of the plurality of outlet pipes being connected to the plurality of solid heat storage modules, and the other end of each of the plurality of outlet pipes being connected to the mixing structure.

[0016] Optionally, a temperature detection structure is arranged on each outlet pipe.

[0017] The present application has the following advantages:

[0018] 1. The control method provided by the present application, the trough mirror field heat collecting solid heat storage system includes a plurality of solid heat storage modules A1, A2, …, An and a mixing structure arranged in parallel, the outlets of the plurality of solid heat storage modules are connected with the mixing structure, the design temperatures K1, K2, …, Kn of the plurality of solid heat storage modules are different, and K1 to Kn gradually decrease, the control method includes: step S1, inputting a heat exchange medium and opening a solid heat storage module Ai corresponding to the temperature of the heat exchange medium; step S2, when the temperature of the heat exchange medium flowing out of the solid heat storage module Ai rises to a preset temperature, opening a solid heat storage module Ai+1; and step S3, repeating step S2 until the solid heat storage module An is opened.

[0019] The heat exchange medium flowing out of the trough mirror field system has a certain temperature, and a corresponding solid heat storage module Ai is selected according to the temperature of the heat exchange medium, and the temperature of the heat exchange medium is higher than or equal to the design temperature Ki of the solid heat storage module Ai, so as to ensure that the heat exchange medium at the temperature can heat the solid heat storage module Ai to the design temperature Ki. The heat exchange medium enters the solid heat storage module Ki at the current temperature for heat exchange, and then flows out of the solid heat storage module Ki at the heat-exchanged temperature and enters the mixing structure.

[0020] Since the temperature of the heat exchange medium in the trough mirror field system will affect the absorption of solar heat by the heat exchange medium, the heat storage temperature of the solid heat storage module is increased after the heat exchange medium passes through the solid heat storage module Ki once, and then in the multiple circulation processes of the heat exchange medium, the temperature of the heat exchange medium flowing out of the solid heat storage module Ki is gradually increased, which further causes the heat exchange medium flowing out of the mixing structure to gradually increase. In order to ensure that the heat exchange medium entering the trough mirror field system is always within the range of the optimal working temperature, the temperature of the heat exchange medium in the mixing structure needs to be controlled.

[0021] The time of opening the next solid heat storage module can be determined by setting a preset temperature, thereby slowing down the continuous rise of the heat exchange medium temperature flowing out of the mixed structure to a temperature higher than the optimal working temperature range of the heat exchange medium. When the heat exchange medium temperature flowing out of the solid heat storage module Ki is higher than or equal to the preset temperature, the solid heat storage module Ki+1 is opened, and then the heat exchange medium enters the two solid heat storage modules for heat exchange, and then enters the mixed structure through the two solid heat storage modules. The heat exchange medium temperature flowing out of the solid heat storage module Ki is higher than or equal to the preset temperature, the heat exchange medium temperature flowing out of the solid heat storage module Ki+1 is lower than the preset temperature, and after mixing in the mixed structure, the heat exchange medium temperature flowing out of the mixed structure can still be stabilized within the optimal working temperature range of the heat exchange medium. Therefore, the heat exchange medium flowing out of the mixed structure to the trough mirror field system can efficiently absorb solar heat. Thus, the problem of continuous rise of the heat exchange medium temperature after multiple cycles, resulting in low heat absorption efficiency of the final heat exchange medium, is solved.

[0022] When the heat exchange medium temperature flowing out of the solid heat storage module Ki+1 is higher than or equal to the preset temperature, the solid heat storage module Ki+2 is opened, so that the heat exchange medium enters the solid heat storage module Ki, the solid heat storage module Ki+1 and the solid heat storage module Ki+2. Based on the same principle, the heat exchange temperature flowing out of the mixed structure can also be stabilized within the optimal working temperature range of the heat exchange medium. This is true for the solid heat storage module Kn.

[0023] In summary, the control method of the present application controls the heat exchange medium temperature flowing into the mixed structure through each heat storage module, so that the heat exchange medium temperature flowing out of the mixed structure is always stabilized within the optimal working temperature range of the heat exchange medium. Therefore, the heat exchange medium can efficiently absorb solar heat.

[0024] 2. The control method provided by the present application, the heat exchange medium flow rate of the solid heat storage module Ai+1 accounts for half of the total flow rate. The solid heat storage module Ai+1 is the latest opened solid heat storage module. The half of the heat exchange medium flow rate is introduced into the solid heat storage module Ai+1, which can ensure that the heat of the heat exchange medium is effectively absorbed by the solid heat storage module Ai+1, thereby ensuring that the heat exchange medium flowing into the mixed structure from the solid heat storage module Ai+1 is mixed with the other half of the heat exchange medium which has reached the preset temperature, and the heat exchange medium temperature flowing out of the mixed structure can be stabilized within the optimal working temperature range.

[0025] 3. The control method provided by the application, the heat exchange medium flow of the solid heat storage module A1 to the solid heat storage module Ai is evenly distributed. On the basis that the heat exchange medium flow of the solid heat storage module Ai+1 accounts for half of the total flow, the other flow of the heat exchange medium enters the solid heat storage module A1 to the solid heat storage module Ai, and each solid heat storage module is evenly distributed, so that each solid heat storage module can continue to absorb the heat of the heat exchange medium, and the temperature rising rate of the heat exchange medium is slowed down.

[0026] 4. The control method provided by the application, when the temperature of any solid heat storage module reaches the design temperature, the solid heat storage module is closed. Taking the solid heat storage module Ki as an example, when the heat storage temperature of the solid heat storage module Ki reaches the design temperature of the solid heat storage module Ki, it is proved that the heat storage of the solid heat storage module Ki is completed, and after the solid heat storage module Ki is closed, the heat exchange medium entering the subsequent solid heat storage modules which do not reach the design temperature of the solid heat storage module Ki can be increased, and the temperature rising rate of each solid heat storage module can be accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 is a flow chart of the control method of the trough mirror field heat collection solid heat storage system provided by the first embodiment of the application;

[0029] Figure 2 is a structural schematic diagram of the trough mirror field heat collection solid heat storage system provided by the fourth embodiment of the application;

[0030] Figure 3 is a structural schematic diagram of the solid heat storage system provided by the fourth embodiment of the application.

[0031] Explanation of reference signs:

[0032] 1, trough mirror field system; 2, solid heat storage system; 3, circulating pipeline; 31, inlet pipe; 311, switch structure; 32, outlet pipe; 4, mixing structure; A1, first solid heat storage module; A2, second solid heat storage module; A3, third solid heat storage module; An, nth solid heat storage module. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0037] Embodiment one

[0038] Reference Figure 1 The present application provides a control method of a trough mirror field heat collection solid heat storage system, the trough mirror field heat collection solid heat storage system comprising a plurality of solid heat storage modules A1, A2, …, An and a mixing structure arranged in parallel, the outlets of the plurality of solid heat storage modules are connected with the mixing structure, the design temperatures K1, K2, …, Kn of the plurality of solid heat storage modules are different, K1 to Kn gradually decrease, and the control method comprises:

[0039] Step S1, introducing a heat exchange medium, and opening the solid heat storage module Ai corresponding to the temperature of the heat exchange medium.

[0040] Specifically, the trough mirror field heat collection solid heat storage system comprises a trough mirror field system and a solid heat storage system, a heat exchange medium flows in the trough mirror field system, the heat exchange medium absorbs solar heat and flows out from the trough mirror field system to the solid heat storage system. The heat exchange medium flows in the solid heat storage system, and each solid heat storage module in the solid heat storage system exchanges heat with the heat exchange medium, that is, the heat exchange medium enters each solid heat storage module at a high temperature and flows to the trough mirror field system at a low temperature after heat exchange, thereby completing a heat exchange cycle.

[0041] In this embodiment, each solid heat storage module is defined as a solid heat storage module A1, A2, …, An, and different solid heat storage modules have different design temperatures, which refer to expected heat storage temperatures of the solid heat storage modules. When any solid heat storage module reaches the design temperature, the heat exchange medium can not pass through the solid heat storage module. The design temperatures of the solid heat storage modules are defined as K1, K2, …, Kn in turn, K1 to Kn decrease in turn, and the difference between adjacent two design temperatures is greater than 5℃.

[0042] Based on this, after the trough mirror field heat collection solid heat storage system starts to work, the heat exchange medium circulates in the trough mirror field system and the solid heat storage modules. According to the current temperature of the heat exchange medium, the corresponding solid heat storage module Ki is opened, and the design temperature of the solid heat storage module Ki is lower than or equal to the current temperature of the heat exchange medium. In this way, it is ensured that the heat exchange medium can heat the solid heat storage module Ki to the design temperature, and it is also prevented that the heat exchange medium enters the solid heat storage module with a higher temperature than the current temperature of the heat exchange medium, thereby destroying the original storage temperature of the solid heat storage module.

[0043] For example, the total flow of the heat exchange medium in the trough mirror field heat collection solid heat storage system is 1200m 3 / h, the heat exchange medium is heat conducting oil, and the solid heat storage system comprises four solid heat storage modules A1, A2, A3 and A4 arranged in parallel. The design temperature K1 of the first solid heat storage module A1 is 393℃, the design temperature K2 of the second solid heat storage module A2 is 373℃, the design temperature K3 of the third solid heat storage module A3 is 353℃, and the design temperature K4 of the fourth solid heat storage module A4 is 333℃.

[0044] For the convenience of description, the temperature of the heat exchange medium flowing out of the trough mirror field system in this embodiment is higher than 393℃, that is, higher than the design temperature K1 of the first solid heat storage module A1. It should be understood by those skilled in the art that the temperature of the heat exchange medium and the design temperature in this embodiment are only examples for the convenience of description of the control method of the present application, and are not specific limitations on the control method of the present application.

[0045] Since the temperature of the heat exchange medium is higher than the design temperature of the first solid heat storage module A1, the heat exchange medium can be controlled to flow into the first solid heat storage module A1 at a flow rate of 1200 m 3 / h. During the heat exchange with the heat exchange medium, the temperature of the first solid heat storage module A1 gradually rises, and the heat absorption capacity gradually decreases. Therefore, the temperature of the heat exchange medium flowing out of the first solid heat storage module gradually rises.

[0046] In step S2, when the heat storage temperature of the solid heat storage module Ai rises to the preset temperature, the solid heat storage module Ai+1 is opened.

[0047] Specifically, the preset temperature can be within the optimal working temperature range of the heat exchange medium, thereby ensuring that the heat exchange medium flowing from the solid heat storage system to the trough mirror field system can efficiently absorb solar heat. The solid heat storage module Ai+1 is the next solid heat storage module opened based on the opening of the first solid heat storage module Ai. After the next solid heat storage module is opened, the heat exchange medium can be divided into two parts and flow into the two solid heat storage modules. The temperatures of the heat exchange medium flowing out of the two solid heat storage modules are different, but after mixing in the mixing structure, the temperature can be stabilized within the optimal temperature range for heat absorption of the heat exchange medium, thereby ensuring that the heat exchange medium flowing from the solid heat storage system to the trough mirror field system can effectively absorb solar heat.

[0048] In the above example, when the temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than the preset temperature, the second solid heat storage module A2 is opened, and the heat exchange medium is divided into two parts and flows into the two solid heat storage modules. The temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than or equal to the preset temperature, and the temperature of the heat exchange medium flowing out of the second solid heat storage module A2 is lower than the preset temperature. This facilitates the subsequent mixing of the heat exchange medium flowing out of the first solid heat storage module A1 and the second solid heat storage module A2 in the mixing structure.

[0049] In one embodiment of the present embodiment, the preset temperature is the design temperature Kn of the solid heat storage module An. For example, the preset temperature is the design temperature K4 of the fourth solid heat storage module A4, K4 = 333 ℃. That is, when the temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than 333 ℃, the second solid heat storage module A2 is opened.

[0050] In one embodiment of the present embodiment, in step S2, the flow rate of the heat exchange medium of the solid heat storage module Ai+1 accounts for half of the total flow rate. For example, the total flow rate of the heat exchange medium is 1200 m 3 / h, and after the second solid heat storage module A2 is opened, the flow rate of the heat exchange medium flowing into the second solid heat storage module A2 is 600 m 3 / h, and the flow rate of the heat exchange medium flowing into the first solid heat storage module A1 is 600 m3 / h.

[0051] Step S3, repeat step S2 until the solid heat storage module An is opened.

[0052] Specifically, the solid heat storage module An is the last one, when the last one is opened, it means that the temperature of the heat exchange medium flowed out of all the previously opened solid heat storage modules is greater than or equal to the preset temperature, so the last one needs to be opened to reduce the temperature of the heat exchange medium in the mixed structure, so as to ensure that the temperature of the heat exchange medium flowed out of the mixed structure is stable in the effective working temperature range.

[0053] In the above example, when the temperature of the heat exchange medium flowed out of the second solid heat storage module A2 is greater than or equal to 333℃, the third solid heat storage module A3 is opened, and then the temperature of the heat exchange medium flowed out of the third solid heat storage module A3 is less than 333℃, and after mixing with the heat exchange medium flowed out of the first solid heat storage module A1 and the second solid heat storage module A2 in the mixed structure, it can still be stable in the effective working temperature range.

[0054] In one embodiment of the present embodiment, in step 3, the heat exchange medium flow of the solid heat storage module Ai+1 is evenly distributed. Different from step S2 of the present embodiment, when step S2 is performed for the first time, only two solid heat storage modules are opened, and in step S3, the cycle step is entered, so that three solid heat storage modules are opened, so when three or more solid heat storage modules are opened, the heat exchange medium flow in the last opened solid heat storage module is controlled to be half of the total flow, so that half of the heat exchange medium temperature is lower than the preset temperature, and half of the heat exchange medium temperature is higher than or equal to the preset temperature, so that after mixing, the temperature of the heat exchange medium can be stabilized in the effective working temperature range.

[0055] In the above example, the heat exchange medium flow entering the third solid heat storage module A3 is half of the total flow, that is, 600m 3 / h, so that half of the heat exchange medium temperature is temporarily lower than 333℃, and half of the heat exchange medium temperature is higher than or equal to 333℃, and after mixing, it can be stabilized in the effective heat absorption range of the heat exchange medium.

[0056] In one embodiment of the present embodiment, the heat exchange medium flow of the solid heat storage module A1 to the solid heat storage module Ai is evenly distributed. After opening three or more solid heat storage modules, the flow of the last opened solid heat storage module is half of the total flow, and the remaining half of the heat exchange is evenly distributed to the previously opened solid heat storage modules, so that each solid heat storage module can continue to be heated.

[0057] Following the above example, the heat exchange medium flow into the third solid heat storage module A3 is 600 m 3 / h, the remaining 600 m 3 / h is evenly distributed to the first solid heat storage module A1 and the second solid heat storage module A2, i.e. 300 m 3 / h respectively, so that the temperature of the mixed heat exchange medium flowing out of each solid heat storage module can be stabilized within the effective working temperature range, and the solid heat storage module that has reached the preset temperature can be steadily heated to its design temperature.

[0058] Similarly, when the temperature of the heat exchange medium flowing out of the third solid heat storage module A3 reaches the design temperature, the fourth solid heat storage module A4 can be opened, the flow of heat exchange medium into the fourth solid heat storage module A4 is half of the total flow, and the remaining heat exchange medium is evenly distributed to the first solid heat storage module A1, the second solid heat storage module A2 and the third solid heat storage module A3.

[0059] Based on this, the present embodiment can open each solid heat storage module in turn in the above manner, and according to the flow distribution rule, the temperature of the heat exchange medium in the mixed structure can be ensured to be within the effective working temperature range, and each solid heat storage module whose outflow temperature has reached the preset temperature can be steadily heated to the heat storage temperature.

[0060] In one embodiment of the present embodiment, when the heat storage temperature of any solid heat storage module reaches the design temperature, the solid heat storage module is closed. Half of the flow of heat exchange medium flows into the last opened solid heat storage module, and the remaining half of the flow is used to heat all the previously opened solid heat storage modules. When the heat storage temperature of any solid heat storage module reaches the design temperature, it means that the solid heat storage module has met the heat storage requirement and can be closed, and the remaining flow is redistributed to the remaining solid heat storage modules whose outflow temperature is higher than the preset temperature.

[0061] Following the above example, when the fourth solid heat storage module A4 is opened, the heat storage temperature of the first solid heat storage module A1 reaches 393℃, and the first solid heat storage module A1 can be closed. Then, the 600 m 3 / h of heat exchange medium is redistributed to the second solid heat storage module A2 and the third solid heat storage module A3 to accelerate the heat storage temperature rising efficiency of the second solid heat storage module A2 and the third solid heat storage module A3.

[0062] It should be noted that the above first solid heat storage module A1 is preferentially to reach the design temperature is for illustration, in actual application, it is also possible that the second solid heat storage module A2, the third solid heat storage module A3 preferentially reaches the design temperature, and the solid heat storage module which has reached the design temperature can also be closed in the above manner, and the remaining flow is redistributed, and the present application does not limit the order of reaching the design temperature of each heat storage module.

[0063] Embodiment two

[0064] The control method of the trough mirror field heat collecting solid heat storage system and the structure of the trough mirror field heat collecting solid heat storage system in this embodiment are completely the same as those in embodiment one, and the same parts will not be repeated here, and the differences will be described in detail below.

[0065] In this embodiment, the total flow of the heat exchange medium in the trough mirror field heat collecting solid heat storage system is 2560m 3 / h, the heat exchange medium is molten salt, and the solid heat storage system includes five solid heat storage modules arranged in parallel, which are the first solid heat storage module A1, the second solid heat storage module A2, the third solid heat storage module A3, the fourth solid heat storage module A4 and the fifth solid heat storage module A5. The design temperature K1 of the first solid heat storage module A1 is 560℃, the design temperature K2 of the second solid heat storage module A2 is 535℃, the design temperature K3 of the third solid heat storage module A3 is 510℃, the design temperature K4 of the fourth solid heat storage module A4 is 485℃, and the design temperature of the fifth solid heat storage module A5 is 460℃.

[0066] For the convenience of description, the temperature of the heat exchange medium flowing out of the trough mirror field system in this embodiment is defined as higher than 560℃, that is, higher than the design temperature K1 of the first solid heat storage module A1. It should be understood by those skilled in the art that the temperature of the heat exchange medium and the design temperature in this embodiment are only examples for the convenience of describing the control method of the present application, and are not specific limitations on the control method of the present application.

[0067] Step S1, the heat exchange medium is introduced, and the solid heat storage module Ai corresponding to the temperature of the heat exchange medium is opened.

[0068] Since the temperature of the heat exchange medium is higher than the design temperature of the first solid heat storage module A1, the heat exchange medium can be controlled to enter the first solid heat storage module A1 at a flow rate of 2560m 3 / h for heat exchange. The temperature of the first solid heat storage module A1 gradually rises in the process of heat exchange with the heat exchange medium, and the heat absorption capacity decreases, so the temperature of the heat exchange medium flowing out of the first solid heat storage module also gradually rises.

[0069] Step S2, when the heat storage temperature of the solid heat storage module Ai rises to the preset temperature, open the solid heat storage module Ai+1.

[0070] Specifically, the preset temperature can be within the optimal working temperature range of the heat exchange medium, thereby ensuring that the heat exchange medium subsequently entering the mirror field heat collection system from the solid heat storage system can efficiently absorb solar heat. The solid heat storage module Ai+1 is the next solid heat storage module opened on the basis of opening the first solid heat storage module Ai. After opening the next solid heat storage module, the heat exchange medium can be divided into two solid heat storage modules. The heat exchange medium flowing out of the two solid heat storage modules has different temperatures, but after mixing in the mixing structure, it can be stabilized within the optimal temperature range for heat absorption of the heat exchange medium, thereby ensuring that the heat exchange medium flowing from the solid heat storage system to the trough mirror field system can effectively absorb solar heat.

[0071] Using the above example, when the temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than the preset temperature, the second solid heat storage module A2 is opened, and the heat exchange medium is divided into two solid heat storage modules. The temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than or equal to the preset temperature, and the temperature of the heat exchange medium flowing out of the second solid heat storage module A2 is lower than the preset temperature. This facilitates the subsequent mixing of the first solid heat storage module A1 and the second solid heat storage module A2 into the mixing structure.

[0072] In one embodiment of the present embodiment, the preset temperature is the design temperature Kn of the solid heat storage module An. For example, the preset temperature is the design temperature K5 of the fifth solid heat storage module A5, K5 = 460℃, that is, when the temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than 460℃, the second solid heat storage module A2 is opened.

[0073] In one embodiment of the present embodiment, in step S2, the heat exchange medium flow of the solid heat storage module Ai+1 accounts for half of the total flow. For example, the total flow of the heat exchange medium is 2560m 3 / h, after opening the second solid heat storage module A2, the heat exchange medium flow entering the second solid heat storage module A2 is 1280m 3 / h, the heat exchange medium flow entering the first solid heat storage module A1 is 1280m 3 / h.

[0074] Step S3, repeat step S2 until the solid heat storage module An is opened.

[0075] Specifically, the solid heat storage module An is the last one, when it is opened, it means that the temperature of the heat exchange medium flowing out of all the previously opened solid heat storage modules is greater than or equal to the preset temperature, and then the last solid heat storage module needs to be opened to reduce the temperature of the heat exchange medium in the mixing structure, so as to ensure that the temperature of the heat exchange medium flowing out of the mixing structure is stable in the efficient working temperature range.

[0076] In the above example, when the temperature of the heat exchange medium flowing out of the second solid heat storage module A2 is greater than or equal to 460℃, the third solid heat storage module A3 is opened, and then the temperature of the heat exchange medium flowing out of the third solid heat storage module A3 is less than 460℃, and after mixing with the heat exchange medium flowing out of the first solid heat storage module A1 and the second solid heat storage module A2 in the mixing structure, it can still be stable in the effective working temperature range.

[0077] In one embodiment of the present embodiment, in step 3, the heat exchange medium flow of the solid heat storage module Ai+1 is evenly distributed. Different from step S2 of the present embodiment, when step S2 is performed for the first time, only two solid heat storage modules are opened, and in step S3, the circulating step is entered, so that three solid heat storage modules are opened. Therefore, when three or more solid heat storage modules are opened, the heat exchange medium flow in the last opened solid heat storage module is controlled to be half of the total flow, so that half of the heat exchange medium temperature is lower than the preset temperature, and half of the heat exchange medium temperature is higher than or equal to the preset temperature, and then after mixing, the temperature of the heat exchange medium can be stable in the effective working temperature range.

[0078] In the above example, the heat exchange medium flow entering the third solid heat storage module A3 is half of the total flow, that is, 1280m 3 / h, so that half of the heat exchange medium temperature is temporarily lower than 460℃, and half of the heat exchange medium temperature is higher than or equal to 460℃, and after mixing, it can be stable in the effective heat absorption range of the heat exchange medium.

[0079] In one embodiment of the present embodiment, the heat exchange medium flow of the solid heat storage module A1 to the solid heat storage module Ai is evenly distributed. After three or more solid heat storage modules are opened, the flow of the last opened solid heat storage module is half of the total flow, and the remaining half of the heat exchange is evenly distributed to the previously opened solid heat storage modules, so that each solid heat storage module can continue to heat up.

[0080] In the above example, on the basis of the heat exchange medium flow entering the third solid heat storage module A3 being 1280m 3 / h, the remaining 1280m 3the flow rate of 640 m 3 / h, so that the temperature of the heat exchange medium flowing out of each solid heat storage module can be stabilized within the effective working temperature range, and the solid heat storage module that has reached the preset temperature can be steadily warmed to its design temperature.

[0081] Similarly, when the temperature of the heat exchange medium flowing out of the third solid heat storage module A3 reaches the design temperature, the fourth solid heat storage module A4 can be opened, the flow rate of the heat exchange medium flowing into the fourth solid heat storage module A4 is half of the total flow rate, and the remaining heat exchange medium is evenly distributed to the first solid heat storage module A1, the second solid heat storage module A2, and the third solid heat storage module A3. For example, the flow rate of the heat exchange medium flowing into the fourth solid heat storage module A4 is 1280 m 3 / h, and the flow rates of the heat exchange medium flowing into the first solid heat storage module A1, the second solid heat storage module A2, and the third solid heat storage module A3 are all 426.66 m 3 / h.

[0082] Similarly, when the temperature of the heat exchange medium flowing out of the fourth solid heat storage module A4 reaches the design temperature, the fifth solid heat storage module A5 can be opened, the flow rate of the heat exchange medium flowing into the fifth solid heat storage module A5 is half of the total flow rate, and the remaining heat exchange medium is evenly distributed to the first solid heat storage module A1, the second solid heat storage module A2, the third solid heat storage module A3, and the fourth solid heat storage module A4. For example, the flow rate of the heat exchange medium flowing into the fifth solid heat storage module A5 is 1280 m 3 / h, and the flow rates of the heat exchange medium flowing into the first solid heat storage module A1, the second solid heat storage module A2, the third solid heat storage module A3, and the fourth solid heat storage module A4 are all 320 m 3 / h.

[0083] Based on this, the embodiment can open each solid heat storage module in turn in the above-described manner, and according to the flow rate distribution rule, the temperature of the heat exchange medium in the mixed structure can be ensured to be within the effective working temperature range, and each solid heat storage module that has reached the preset temperature can be steadily warmed to its design temperature.

[0084] In one embodiment of the present embodiment, when the heat storage temperature of any solid heat storage module reaches the design temperature, the solid heat storage module is closed. Half of the flow of heat exchange medium flows into the last opened solid heat storage module, and the remaining half is used to heat all the previously opened solid heat storage modules. When the heat storage temperature of any solid heat storage module reaches the design temperature, it means that the solid heat storage module has met the heat storage requirement and can be closed, and the remaining flow is redistributed to the remaining solid heat storage modules with a flow-out temperature higher than the preset temperature.

[0085] In the above example, when the fifth solid heat storage module A5 is opened, the heat storage temperature of the first solid heat storage module A1 reaches 560℃, and the first solid heat storage module A1 can be closed. Then, 1280m 3 / h of heat exchange medium is redistributed to the second solid heat storage module A2, the third solid heat storage module A3, and the fourth solid heat storage module A4 to accelerate the heat storage temperature rising efficiency of the second solid heat storage module A2, the third solid heat storage module A3, and the fourth solid heat storage module A4.

[0086] It should be noted that the above first solid heat storage module A1 reaching the design temperature first is for illustration only. In actual application, it is also possible that the second solid heat storage module A2, the third solid heat storage module A3, or the fourth solid heat storage module A4 reaches the design temperature first. In this case, the solid heat storage module that has reached the design temperature can be closed and the remaining flow can be redistributed in the manner described above. The present application does not limit the order in which the heat storage modules reach the design temperature.

[0087] Embodiment Three

[0088] The present embodiment has the same control method and structure as the trough-type mirror field heat collection solid heat storage system in Embodiment One. The same parts will not be repeated here, and the differences will be described in detail below.

[0089] In the present embodiment, the total flow of heat exchange medium in the trough-type mirror field heat collection solid heat storage system is 640m 3 / h, the heat exchange medium is water / water vapor, and the solid heat storage system includes four solid heat storage modules in parallel, namely the first solid heat storage module A1, the second solid heat storage module A2, the third solid heat storage module A3, and the fourth solid heat storage module A4. The design temperature K1 of the first solid heat storage module A1 is 480℃, the design temperature K2 of the second solid heat storage module A2 is 420℃, the design temperature K3 of the third solid heat storage module A3 is 360℃, and the design temperature K4 of the fourth solid heat storage module A4 is 300℃.

[0090] For the convenience of description, the temperature of the heat exchange medium flowing out of the trough mirror field system in the embodiment is defined as higher than 480℃, i.e. higher than the design temperature K1 of the first solid heat storage module A1. Those skilled in the art should understand that the temperature of the heat exchange medium and the design temperature in the embodiment are only examples for the convenience of description of the control method of the present application, and are not specific limitations on the control method of the present application.

[0091] In step S1, the heat exchange medium is introduced, and the solid heat storage module Ai corresponding to the temperature of the heat exchange medium is opened.

[0092] Since the temperature of the heat exchange medium is higher than the design temperature of the first solid heat storage module A1, the heat exchange medium can be controlled to flow into the first solid heat storage module A1 at a flow rate of 640 m 3 / h for heat exchange. The temperature of the first solid heat storage module A1 gradually increases in the process of heat exchange with the heat exchange medium, and the heat absorption capacity decreases, so the temperature of the heat exchange medium flowing out of the first solid heat storage module gradually increases.

[0093] In step S2, when the heat storage temperature of the solid heat storage module Ai rises to a preset temperature, the solid heat storage module Ai+1 is opened.

[0094] Specifically, the preset temperature can be within the optimal working temperature range of the heat exchange medium, thereby ensuring that the heat exchange medium subsequently flowing from the solid heat storage system to the mirror field heat collection system can efficiently absorb solar heat. The solid heat storage module Ai+1 is the next solid heat storage module opened on the basis of opening the first solid heat storage module Ai. After the next solid heat storage module is opened, the heat exchange medium can be divided into two parts and flow into the two solid heat storage modules. The temperatures of the heat exchange medium flowing out of the two solid heat storage modules are different, but after mixing in the mixing structure, they can be stabilized within the optimal temperature range for heat absorption of the heat exchange medium, thereby ensuring that the heat exchange medium flowing from the solid heat storage system to the trough mirror field system can effectively absorb solar heat.

[0095] In the above example, when the temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than the preset temperature, the second solid heat storage module A2 is opened, and the heat exchange medium is divided into two parts and flows into the two solid heat storage modules. The temperature of the heat exchange medium flowing out of the first solid heat storage module A1 is higher than or equal to the preset temperature, and the temperature of the heat exchange medium flowing out of the second solid heat storage module A2 is lower than the preset temperature. This facilitates the subsequent mixing of the first solid heat storage module A1 and the second solid heat storage module A2 into the mixing structure.

[0096] In one embodiment of the present embodiment, the preset temperature is the design temperature Kn of the solid heat storage module An, for example, the preset temperature is the design temperature K4 of the fourth solid heat storage module A4, K4 = 300℃, that is, when the temperature of the heat transfer medium flowing out of the first solid heat storage module A1 is higher than 300℃, the second solid heat storage module A2 is opened.

[0097] In one embodiment of the present embodiment, in step S2, the heat transfer medium flow rate of the solid heat storage module Ai+1 accounts for half of the total flow rate. For example, the total flow rate of the heat transfer medium is 640m 3 / h, after the second solid heat storage module A2 is opened, the heat transfer medium flow rate entering the second solid heat storage module A2 is 320m 3 / h, and the heat transfer medium flow rate entering the first solid heat storage module A1 is 320m 3 / h.

[0098] Step S3, repeat step S2 until the solid heat storage module An is opened.

[0099] Specifically, the solid heat storage module An is the last solid heat storage module, when the last solid heat storage module is opened, it means that the heat transfer medium flowing out of all the previously opened solid heat storage modules is greater than or equal to the preset temperature, and then the last solid heat storage module needs to be opened to reduce the temperature of the heat transfer medium in the mixed structure, so as to ensure that the temperature of the heat transfer medium flowing out of the mixed structure is stable within the effective working temperature range.

[0100] In the above example, when the temperature of the heat transfer medium flowing out of the second solid heat storage module A2 is greater than or equal to 300℃, the third solid heat storage module A3 is opened, and then the temperature of the heat transfer medium flowing out of the third solid heat storage module A3 is less than 300℃, and after the heat transfer medium flowing out of the first solid heat storage module A1 and the second solid heat storage module A2 is mixed in the mixed structure, it can still be stable within the effective working temperature range.

[0101] In one embodiment of the present embodiment, in step 3, the heat transfer medium flow rate of the solid heat storage module Ai+1 is evenly distributed. Different from step S2 of the present embodiment, when step S2 is performed for the first time, only two solid heat storage modules are opened, and in step S3, the circulating step is entered, so that three solid heat storage modules are opened. Therefore, when three or more solid heat storage modules are opened, the heat transfer medium flow rate in the last opened solid heat storage module is controlled to be generally half of the total flow rate, so that half of the heat transfer medium temperature is lower than the preset temperature, and half of the heat transfer medium temperature is higher than or equal to the preset temperature, and then after mixing, the temperature of the heat transfer medium can be stable within the effective working temperature range.

[0102] Following the above example, the heat exchange medium flow entering the third solid heat storage module A3 is half of the total flow, that is, 320 m 3 / h, so that half of the heat exchange medium temperature is temporarily below 300℃, and half of the heat exchange medium temperature is higher than or equal to 300℃, and after mixing, it can be stabilized within the effective heat absorption range of the heat exchange medium.

[0103] In one embodiment of the present embodiment, the heat exchange medium flow of the solid heat storage module A1 to the solid heat storage module Ai is evenly distributed. After opening three or more solid heat storage modules, the flow of the last opened solid heat storage module is half of the total flow, and the remaining half of the heat exchange is evenly distributed to the previously opened solid heat storage modules to ensure that each solid heat storage module can continue to heat up.

[0104] Following the above example, the heat exchange medium flow entering the third solid heat storage module A3 is 320 m 3 / h, and the remaining 320 m 3 / h is evenly distributed to the first solid heat storage module A1 and the second solid heat storage module A2, that is, 160 m 3 / h, which can ensure that the mixed temperature of the heat exchange medium flowing out of each solid heat storage module is stabilized within the effective working temperature range, and the solid heat storage module that has reached the preset temperature can be stabilized to the design temperature.

[0105] Similarly, when the heat exchange medium temperature flowing out of the third solid heat storage module A3 reaches the design temperature, the fourth solid heat storage module A4 can be opened, and the heat exchange medium flow entering the fourth solid heat storage module A4 is half of the total flow, and the remaining heat exchange medium is evenly distributed to the first solid heat storage module A1, the second solid heat storage module A2, and the third solid heat storage module A3. For example, the heat exchange medium flow entering the fourth solid heat storage module A4 is 320 m 3 / h, and the flow entering the first solid heat storage module A1, the second solid heat storage module A2, and the third solid heat storage module is 106.66 m 3 / h.

[0106] Based on this, the present embodiment can open each solid heat storage module in the above-mentioned manner, and according to the flow distribution rule, it can ensure that the temperature of the heat exchange medium in the mixed structure meets the effective working temperature range, and each solid heat storage module whose outflow temperature has reached the preset temperature can stably improve the heat storage temperature.

[0107] In one embodiment of the present embodiment, when the heat storage temperature of any solid heat storage module reaches the design temperature, the solid heat storage module is closed. Half of the flow of the heat exchange medium flows into the last opened solid heat storage module, and the remaining half is used to heat all the previously opened solid heat storage modules. When the heat storage temperature of any solid heat storage module reaches the design temperature, it means that the solid heat storage module has met the heat storage requirement and can be closed, and the remaining flow is redistributed to the remaining solid heat storage modules whose outflow temperature is higher than the preset temperature.

[0108] In the above example, when the fourth solid heat storage module A4 is opened, the heat storage temperature of the first solid heat storage module A1 reaches 480℃, and the first solid heat storage module A1 can be closed. Then, 320m 3 / h of the heat exchange medium is redistributed to the second solid heat storage module A2 and the third solid heat storage module A3 to accelerate the heat storage temperature rising efficiency of the second solid heat storage module A2 and the third solid heat storage module A3.

[0109] It should be noted that the above first solid heat storage module A1 is used as an example to reach the design temperature first. In actual application, it is also possible that the second solid heat storage module A2 or the third solid heat storage module A3 reaches the design temperature first. In this case, the solid heat storage module that has reached the design temperature can be closed and the remaining flow can be redistributed in the above-mentioned manner. The present application does not limit the order in which the heat storage modules reach the design temperature.

[0110] Therefore, in the first embodiment to the third embodiment, heat conducting oil, molten salt, and water / steam are used as the heat exchange medium, and different heat exchange media are suitable for the trough-type mirror field heat collection solid heat storage system.

[0111] Embodiment Four

[0112] The present embodiment provides a trough-type mirror field heat collection solid heat storage system controlled by the control method described above. The trough-type mirror field heat collection solid heat storage system includes a trough-type mirror field system and a solid heat storage system. The solid heat storage system includes a plurality of solid heat storage modules A1, A2, …, An arranged in parallel and a mixing structure. The outlets of the plurality of solid heat storage modules are connected to the mixing structure.

[0113] Specifically, as shown in Figure 2 The trough-type mirror field heat collection solid heat storage system includes a trough-type mirror field system 1 and a solid heat storage system 2, and a circulation pipeline 3 arranged between the trough-type mirror field system 1 and the solid heat storage system 2 in the flow direction of the heat exchange medium. The heat exchange medium enters the trough-type mirror field system through the circulation pipeline 3. The heat exchange medium absorbs solar heat and flows out from the trough-type mirror field system to the solid heat storage system 2.

[0114] The trough mirror field collector is provided with a plurality of trough mirror field collectors connected in series or in parallel, and at least comprises a heat collecting pipe and a parabolic reflector. In operation, the heat collecting pipe is used for flowing of heat exchange medium, and the parabolic reflector is used for reflecting and focusing the sunlight to the heat collecting pipe to heat the heat exchange medium in the heat collecting pipe, so as to realize the conversion of solar energy into heat energy. The specific structure and operation process of the trough mirror field collector are known to those skilled in the art, and the above is an example and will not be described in detail here. The heat exchange medium can be one of heat conducting oil, molten salt, high pressure water or steam.

[0115] Reference Figure 3 The solid heat storage system comprises a plurality of solid heat storage modules arranged in parallel, which are respectively a first solid heat storage module A1, a second solid heat storage module A2, a third solid heat storage module A3, and an n-th solid heat storage module An. The design temperatures of the respective solid heat storage modules are defined as K1, K2, …, Kn in sequence, K1 to Kn decrease in sequence, and the difference between adjacent two design temperatures is greater than 5℃.

[0116] It should be noted that the number of solid heat storage modules and the design temperature can be set according to actual conditions, and the present application does not make specific limitations thereon.

[0117] In one embodiment of the present embodiment, the solid heat storage system 2 comprises a plurality of inlet pipes 31, and the plurality of inlet pipes 31 are arranged in one-to-one correspondence with the plurality of solid heat storage modules.

[0118] In one embodiment of the present embodiment, the switch structure 311 is arranged on each inlet pipe 31. The switch structure 311 can be an adjusting valve, which can control the flow of heat exchange medium into each solid heat storage module. The adjusting valve includes but is not limited to an electric adjusting valve, a pneumatic adjusting valve, a hydraulic adjusting valve and the like commonly used in the art.

[0119] In one embodiment of the present embodiment, the solid heat storage system 2 comprises a plurality of outlet pipes 32, one end of the plurality of outlet pipes 32 is connected with the plurality of solid heat storage modules in one-to-one correspondence, and the other end of the plurality of outlet pipes 32 is connected with the mixing structure 4. The heat exchange medium flowing out of the outlet pipe 32 of any one solid heat storage module can flow into the mixing structure 4, and the mixing structure 4 is used for adjusting the temperature of the heat exchange medium from different outlet pipes 32 to an average temperature and discharging.

[0120] The mixing structure can be a buffer tank, which is a horizontal metal carbon steel container composed of an end cover, a horizontal circular or oval tank wall and a saddle. The specific structure and function of the buffer tank are known to those skilled in the art, and will not be described here.

[0121] In one embodiment of the present embodiment, each outlet pipe 32 is provided with a temperature detection structure, which can be a thermocouple or other temperature detection structure. The temperature detection structure can detect the temperature of the outlet pipe 32, thereby determining the temperature of the heat exchange medium flowing out of the solid heat storage module.

[0122] The above is the structural composition of the present trough mirror field heat collecting solid heat storage system, which can be controlled by the control methods of Embodiment One, Embodiment Two and Embodiment Three, which will not be described herein.

[0123] Obviously, the above embodiments are only examples for the purpose of clear illustration, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A control method for a trough-type mirror field heat collection solid thermal storage system, characterized in that, The trough-type mirror field heat collection solid thermal storage system includes multiple solid thermal storage modules A1, A2...An arranged in parallel and a hybrid structure. The outlets of the multiple solid thermal storage modules are all connected to the hybrid structure. The design temperatures K1, K2...Kn of the multiple solid thermal storage modules are different, with K1 gradually decreasing to Kn. The control method includes: Step S1: Introduce the heat exchange medium and turn on the solid thermal storage module Ai, which corresponds to the temperature of the heat exchange medium. Step S2: When the temperature of the heat exchange medium flowing out of the solid thermal storage module Ai rises to the preset temperature, the solid thermal storage module Ai+1 is turned on. Step S3: Repeat step S2 until the solid thermal storage module An is turned on; In steps S2 and S3, the heat exchange medium flow rate of the solid thermal storage module Ai+1 accounts for half of the total flow rate, and the heat exchange medium flow rates of the solid thermal storage modules A1 to Ai are evenly distributed.

2. The control method according to claim 1, characterized in that, The preset temperature is the design temperature Kn of the solid thermal storage module An.

3. The control method according to claim 1, characterized in that, In steps S2 and S3, when the heat storage temperature of any solid thermal storage module reaches the design temperature, the solid thermal storage module is shut down.

4. A trough-type mirror field heat collection solid-state thermal storage system, characterized in that, Controlled by the control method described in any one of claims 1 to 3, the trough-type mirror field heat collection solid thermal storage system includes a trough-type mirror field system (1) and a solid thermal storage system (2). The solid thermal storage system (2) includes multiple solid thermal storage modules A1, A2...An arranged in parallel and a hybrid structure (4). The outlets of the multiple solid thermal storage modules are all connected to the hybrid structure (4).

5. The trough-type mirror field heat collection solid thermal storage system according to claim 4, characterized in that, The solid thermal storage system (2) includes multiple inlet pipes (31), and the multiple inlet pipes (31) are connected to the multiple solid thermal storage modules one by one.

6. The trough-type mirror field heat collection solid thermal storage system according to claim 5, characterized in that, Each inlet pipe (31) is equipped with a regulating valve (311).

7. The trough-type mirror field heat collection solid thermal storage system according to claim 4, characterized in that, The solid thermal storage system (2) includes multiple outlet pipes (32), one end of each outlet pipe (32) is connected to a corresponding solid thermal storage module, and the other end of each outlet pipe (32) is connected to the hybrid structure (4).

8. The trough-type mirror field heat collection solid thermal storage system according to claim 7, characterized in that, Each of the outlet tubes (32) is equipped with a temperature detection structure.

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