Collecting indirect air-cooled photovoltaic-thermal hybrid system

Abstract

The application provides a heat collecting indirect air cooling type photo-thermal power generation system and belongs to the technical field of solar photo-thermal power generation. The heat collecting indirect air cooling type photo-thermal power generation system comprises a mirror field, an air cooling tower, a heat collector arranged at the top of the air cooling tower, a circulating assembly arranged in the air cooling tower, the circulating assembly being connected with the heat collector, an anti-vibration assembly arranged below the heat collector, a steam generating assembly, an indirect air cooling assembly comprising a condensing element and a condensing liquid pump, the condensing element and the condensing liquid pump being arranged outside the air cooling tower, the condensing element being connected with the steam generating assembly through a first pipeline and a second pipeline, the condensing liquid pump being arranged on the first pipeline, and a first heat exchanger arranged on the first pipeline and connected with the circulating assembly. The heat collector is arranged at the top of the air cooling tower, so that an additional heat absorbing tower is not needed, and the production and construction cost is reduced. Meanwhile, the circulating assembly is arranged in the air cooling tower, so that the heat loss existing when the ambient temperature is low is reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of solar thermal power generation technology, and in particular to a solar thermal power generation system with indirect air cooling and heat collection. Background Technology

[0002] Concentrated solar power (CSP) is a technology that uses solar energy to generate electricity. It focuses sunlight to produce high-temperature heat, which then drives a steam turbine generator to produce electricity. CSP technology has advantages such as being clean, environmentally friendly, and sustainable, and is one of the important development directions in the field of renewable energy.

[0003] Concentrated solar power (CSP) systems are used to convert solar energy into electrical energy. A CSP system mainly consists of a solar mirror field, an air-cooled tower, an absorber tower, a heat exchanger, and a steam turbine generator set. The solar mirror field tracks the sun's movement, reflecting and focusing sunlight onto the absorber tower, converting sunlight into heat energy. The heat exchanger then transfers and converts this heat energy, enabling the steam turbine generator set to use this heat energy to drive a generator and produce electricity.

[0004] However, in cold environments, additional insulation measures are required for the heat absorption tower and air-cooled tower to avoid heat loss and cooling water freezing, which greatly increases production and construction costs. Summary of the Invention

[0005] This application discloses a solar thermal power generation system with indirect air cooling and heat collection, which aims to solve the problem of high production and construction costs of existing solar thermal power generation systems in cold regions.

[0006] This application provides a solar thermal power generation system with indirect air cooling and heat collection, comprising:

[0007] Mirror fields are used to concentrate direct sunlight from the sun;

[0008] An air-cooled tower is located at the center of the mirror field;

[0009] A solar collector is installed at the top of the air-cooled tower. The solar collector is used to collect the direct solar radiation gathered by the mirror field and convert it into heat energy.

[0010] A circulation component is disposed inside the air-cooled tower, and the circulation component is connected to the solar collector;

[0011] Vibration-resistant components are disposed below the solar collector;

[0012] Steam generating components;

[0013] An indirect air-cooled assembly includes a condenser and a condensate pump, both of which are located outside the air-cooled tower. The condenser is connected to the steam generating assembly via a first pipeline and a second pipeline, and the condensate pump is located on the first pipeline.

[0014] A first heat exchanger is disposed on the first pipeline and connected to the circulation assembly.

[0015] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application further includes a circulation pipeline connected end to end, wherein the circulation pipeline is partially disposed within the condenser to cool the steam within the condenser.

[0016] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application further includes a circulating liquid pump in the indirect air-cooling component, which is disposed on the circulating pipeline.

[0017] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application includes a first pipeline comprising a liquid inlet section and a steam inlet section. The two ends of the steam inlet section are respectively connected to the first heat exchanger and the steam generating assembly, and the two ends of the liquid inlet section are respectively connected to the condenser and the first heat exchanger.

[0018] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application further includes a third pipeline and a second heat exchanger. The two ends of the third pipeline are respectively connected to the liquid inlet section and the steam inlet section, and both the third pipeline and the circulation pipeline pass through the second heat exchanger.

[0019] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application includes a steam generation component comprising:

[0020] The steam turbine is connected to the indirect air-cooling assembly via the first pipeline and the second pipeline;

[0021] A generator is connected to the steam turbine.

[0022] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application includes a circulation component comprising:

[0023] A cold tank is connected to the solar collector via a riser pipe, and a heat storage component is installed inside the cold tank.

[0024] The heat tank is connected to the solar collector via a downcomer;

[0025] A first circulation pump is installed on the cold tank, and the first circulation pump is used to pump the heat storage component into the riser pipeline.

[0026] A second circulation pump is installed on the heat tank, and the second circulation pump is used to pump the heat storage element into the first heat exchanger.

[0027] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application further includes a fourth pipeline in the circulation component, with both ends of the fourth pipeline connected to the hot tank and the cold tank, respectively.

[0028] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application has both the first pipeline and the fourth pipeline passing through the first heat exchanger.

[0029] In one possible implementation, the indirect air-cooled solar thermal power generation system provided in this application further includes a fifth pipeline and a third circulation pump in the circulation component. The fifth pipeline is connected to the cold tank and the hot tank respectively, and the third circulation pump is disposed on the fifth pipeline.

[0030] The solar thermal power generation system provided in this application includes a mirror field for concentrating direct solar radiation; an air-cooled tower located at the center of the mirror field; a solar collector located at the top of the air-cooled tower, used to collect the direct solar radiation concentrated by the mirror field and convert it into heat energy; a circulation component located inside the air-cooled tower and connected to the solar collector; an anti-vibration component located below the solar collector; a steam generation component; an indirect air-cooling component including a condenser and a condensate pump, both located outside the air-cooled tower. The condenser is connected to the steam generation component via a first pipeline and a second pipeline, and the condensate pump is located on the first pipeline; and a first heat exchanger located on the first pipeline and connected to the circulation component. The solar thermal power generation system provided in this application reduces production and construction costs by placing the solar collector at the top of the air-cooled tower, eliminating the need for an additional heat absorption tower. Simultaneously, by placing the circulation component inside the air-cooled tower, heat loss at low ambient temperatures is reduced, improving heat exchange efficiency. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 Schematic diagram of the structure of the indirect air-cooled solar thermal power generation system provided in the embodiments of this application. Figure 1 ;

[0033] Figure 2 Schematic diagram of the structure of the indirect air-cooled solar thermal power generation system provided in the embodiments of this application. Figure 2 .

[0034] Explanation of reference numerals in the attached figures:

[0035] 100-Mirror Field;

[0036] 200-Air cooling tower;

[0037] 300 - Solar collector;

[0038] 400 - Circulation assembly; 411 - Cold tank; 412 - Hot tank; 413 - First circulation pump; 414 - Second circulation pump; 415 - Rising line; 416 - Falling line; 417 - Fourth line; 418 - Fifth line; 419 - Third circulation pump;

[0039] 500-Vibration-resistant components;

[0040] 600 - Steam Generator Assembly;

[0041] 700 - Indirect air-cooling assembly; 711 - Condensate component; 712 - Condensate pump; 713 - First pipeline; 7131 - Liquid inlet section; 7132 - Steam inlet section; 714 - Second pipeline; 715 - Circulation pipeline; 716 - Circulation pump; 717 - Third pipeline; 718 - Second heat exchanger;

[0042] 800 - First heat exchanger.

[0043] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0046] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0047] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0048] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0049] Unless otherwise stated, the term "multiple" means two or more.

[0050] As described in the background section, concentrated solar power (CSP) is a technology that uses solar energy to generate electricity. It focuses sunlight to produce high-temperature heat, which then drives a steam turbine generator to produce electricity. CSP technology has advantages such as being clean, environmentally friendly, and sustainable, and is one of the important development directions in the field of renewable energy.

[0051] Concentrated solar power (CSP) systems are used to convert solar energy into electrical energy. A CSP system mainly consists of a solar mirror field, an air-cooled tower, an absorber tower, a heat exchanger, and a steam turbine generator set. The solar mirror field tracks the sun's movement, reflecting and focusing sunlight onto the absorber tower, converting sunlight into heat energy. The heat exchanger then transfers and converts this heat energy, enabling the steam turbine generator set to use this heat energy to drive a generator and produce electricity.

[0052] However, in cold environments, additional insulation measures are required for the heat absorption tower and air-cooled tower to avoid heat loss and cooling water freezing, which greatly increases production and construction costs.

[0053] To address the aforementioned problems, this application provides a solar thermal power generation system with indirect air cooling and solar collectors, comprising: a mirror field for concentrating direct solar radiation; an air-cooled tower located at the center of the mirror field; a solar collector located at the top of the air-cooled tower, used to collect the direct solar radiation concentrated by the mirror field and convert it into heat energy; a circulation assembly located inside the air-cooled tower and connected to the solar collector; an anti-vibration assembly located below the solar collector; a steam generation assembly; an indirect air-cooling assembly including a condenser and a condensate pump, both located outside the air-cooled tower; the condenser connected to the steam generation assembly via a first pipeline and a second pipeline; and a first heat exchanger located on the first pipeline and connected to the circulation assembly. The solar thermal power generation system with indirect air cooling and solar collectors provided by this application reduces production and construction costs by placing the solar collector at the top of the air-cooled tower, eliminating the need for an additional heat absorption tower. Simultaneously, by placing the circulation assembly inside the air-cooled tower, heat loss at low ambient temperatures is reduced, improving heat exchange efficiency.

[0054] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0055] Please refer to Figure 1 and Figure 2 This embodiment provides a solar thermal power generation system with indirect air cooling and solar energy collection, including a mirror field 100 for concentrating direct solar radiation; an air-cooled tower 200 disposed at the center of the mirror field 100; a solar collector 300 disposed at the top of the air-cooled tower 200 for collecting the direct solar radiation concentrated by the mirror field 100 and converting it into heat energy; a circulation component 400 disposed inside the air-cooled tower 200 and connected to the solar collector 300; and an anti-vibration component 500 disposed within the mirror field 100. Below the solar collector 300; a steam generating assembly 600; an indirect air-cooling assembly 700, including a condenser 711 and a condensate pump 712, both of which are located outside the air-cooling tower 200. The condenser 711 is connected to the steam generating assembly 600 via a first pipe 713 and a second pipe 714, and the condensate pump 712 is located on the first pipe 713; and a first heat exchanger 800, located on the first pipe 713 and connected to the circulation assembly 400.

[0056] The mirror field 100 mainly consists of a large number of heliostats, each of which is an independent solar concentrator capable of tracking the sun. The heliostats in the mirror field 100 are arranged in a specific array to form a large-scale reflective surface, used to capture and reflect direct solar radiation, and then focus the captured solar energy onto the collector 300. This achieves the conversion of solar energy into thermal energy.

[0057] In this embodiment, the circulation component 400 can absorb the heat energy in the collector 300 and transfer the heat energy to the steam generating component 600 through the first heat exchanger 800, thereby generating high-temperature and high-pressure steam and using the steam to generate electricity, realizing the conversion of solar energy into electrical energy.

[0058] In this embodiment, the indirect air-cooling component 700 is a cooling component, including a condenser 711 and a condensate pump 712. When high-temperature and high-pressure steam does work, it enters the condenser 711 for condensation, and the condensate is transported and circulated by the condensate pump 712.

[0059] In this embodiment, the condenser 711 is a steam condenser, which is connected to the steam generating assembly 600 through the second pipeline 714 to receive high-temperature steam and condense the steam into condensate.

[0060] Specifically, in this embodiment, both the solar collector 300 and the circulation component 400 are housed inside the air-cooled tower 200, eliminating the need for an additional heat absorption tower and saving on production and construction costs. In cold environments, since the circulation component 400 stores a large amount of heat, placing it inside the air-cooled tower 200 avoids heat loss caused by heat exchange between the stored heat and the surrounding low-temperature air. Furthermore, this embodiment achieves rapid steam condensation by incorporating the indirect air-cooling component 700, thus improving circulation efficiency.

[0061] Meanwhile, placing the solar collector 300 on top of the air-cooled tower 200 provides sufficient space for its installation, enabling the solar collector to better utilize solar energy resources and directly receive radiation energy from the sun, thereby reducing the difficulty of concentrating light and improving the heat collection efficiency.

[0062] In addition, the solar thermal power generation system with indirect air cooling provided in this embodiment also includes an anti-vibration component 500, which is disposed below the collector 300 to prevent the collector 300 from being damaged by vibration during operation.

[0063] In this embodiment, the vibration damping component 500 consists of multiple springs. In other embodiments, the specific structure of the vibration damping component 500 can be adapted to meet actual needs.

[0064] Furthermore, in an optional embodiment, the indirect air-cooling assembly 700 further includes a circulation pipe 715 connected end to end, the circulation pipe 715 being partially disposed within the condenser 711 to cool the steam within the condenser 711.

[0065] Specifically, in this embodiment, a cooling medium circulates in the circulation pipe 715, and the circulation pipe 715 is partially installed inside the condenser 711, thereby exchanging heat with the high-temperature steam entering the condenser 711, causing the steam to condense into condensate, so as to achieve rapid condensation of steam.

[0066] In this embodiment, the portion of the circulation pipe 715 that passes through the condenser 711 is coiled inside the condenser 711. The specific arrangement of the pipe can be determined by considering factors such as the specific structure of the condenser 711 and cooling requirements. This embodiment does not impose any restrictions on this arrangement.

[0067] Furthermore, in an optional embodiment, the indirect air-cooling assembly 700 further includes a circulating liquid pump 716, which is disposed on the circulation pipeline 715.

[0068] Specifically, in this embodiment, a circulating liquid pump 716 is installed on the circulating pipeline 715. The circulating liquid pump 716 provides power to the cooling medium in the circulating pipeline 715 to ensure the smooth flow of the cooling medium in the circulating liquid pump 716. In addition, the circulating liquid pump 716 not only ensures the continuity of the cooling medium flow, but also enables precise control of the flow rate and velocity of the cooling medium, thereby achieving precise control of the condensation efficiency.

[0069] Further, in an optional embodiment, the first pipeline 713 includes a liquid inlet section 7131 and a steam inlet section 7132. The two ends of the steam inlet section 7132 are respectively connected to the first heat exchanger 800 and the steam generating assembly 600, and the two ends of the liquid inlet section 7131 are respectively connected to the condenser 711 and the first heat exchanger 800.

[0070] Specifically, in this embodiment, the first pipeline 713 includes a liquid inlet section 7131 and a steam inlet section 7132. The two ends of the steam inlet section 7132 are connected to the first heat exchanger 800 and the steam generating assembly 600, respectively. High-temperature and high-pressure steam flows in the steam inlet section 7132. The high-temperature and high-pressure steam enters the steam generating assembly 600 through the steam inlet section 7132 to do work, and then is converted into high-temperature and low-pressure steam. It enters the condenser 711 through the second pipeline 714 and condenses into a liquid state. Then it flows back into the liquid inlet section 7131 and re-enters the first heat exchanger 800 to exchange heat with the circulation assembly 400, and is converted into high-temperature and high-pressure steam for circulation. This realizes the continuous utilization of heat energy and the recycling of steam, ensuring the efficient conversion of heat energy and the stable operation of the system.

[0071] Furthermore, in an optional embodiment, the indirect air-cooled assembly 700 further includes a third pipe 717 and a second heat exchanger 718. The two ends of the third pipe 717 are connected to the liquid inlet section 7131 and the steam inlet section 7132, respectively. Both the third pipe 717 and the circulation pipe 715 pass through the second heat exchanger 718.

[0072] Specifically, in this embodiment, the second heat exchanger 718 is installed on the circulation pipe 715 and the third pipe 717. The two ends of the third pipe 717 are connected to the liquid inlet section 7131 and the steam inlet section 7132, respectively. When the condensate in the liquid inlet section 7131 enters the first heat exchanger 800 and undergoes heat exchange to convert into high-temperature, high-pressure steam, some of the high-temperature, high-pressure steam enters the second heat exchanger 718 through the third pipe 717 and exchanges heat with the cooling medium in the circulation pipe 715, condensing into condensate before entering the liquid inlet section 7131. The installation of the third pipe 717 and the second heat exchanger 718 avoids the problem of the cooling medium freezing at low ambient temperatures, while also improving the steam condensation efficiency. This achieves continuous utilization of thermal energy and recycling of steam, ensuring efficient thermal energy conversion and stable system operation.

[0073] Further, in an optional embodiment, the steam generating assembly 600 includes a steam turbine connected to the indirect air-cooling assembly 700 via a first pipeline 713 and a second pipeline 714; and a generator connected to the steam turbine.

[0074] Specifically, in this embodiment, the steam turbine is connected to the condenser 711 via a first pipe 713 and a second pipe 714. High-temperature, high-pressure steam in the first pipe 713 enters the steam turbine and drives the turbine's rotor to rotate, thereby driving a generator to produce electricity or provide other mechanical power. After the high-temperature, high-pressure steam drives the turbine to perform work, the steam pressure drops significantly and flows through the second pipe 714 into the condenser 711 for condensation. The steam is then converted into condensate and re-enters the first pipe 713 for circulation.

[0075] When steam is converted into a liquid state and enters the first pipeline 713, a condensate pump 712 installed on the first pipeline 713 provides power for the liquid flow, ensuring that the liquid can flow smoothly along the first pipeline 713. In addition, the condensate pump 712 not only ensures the continuity of liquid flow, but also enables precise control of flow rate and velocity, thereby achieving stable operation of the system.

[0076] Further, in an optional embodiment, the circulation assembly 400 includes a cold tank 411 connected to the collector 300 via a riser pipe 415, and a heat storage element disposed inside the cold tank 411; a hot tank 412 connected to the collector 300 via a downcomer pipe 416; a first circulation pump 413 disposed on the cold tank 411, the first circulation pump 413 being used to pump the heat storage element into the riser pipe 415; and a second circulation pump 414 disposed on the hot tank 412, the second circulation pump 414 being used to pump the heat storage element into the first heat exchanger 800.

[0077] Specifically, in this embodiment, the circulation assembly 400 includes a cold tank 411 and a hot tank 412. The cold tank 411 stores a heat storage component. A first circulation pump 413 is installed on the cold tank 411 and pumps the heat storage component into the riser pipe 415, thereby exchanging heat with the collector 300 located at the top of the air-cooled tower 200. The heat storage component then enters the hot tank 412 through the downcomer pipe 416 for storage. When heat exchange is required, a second circulation pump 414 pumps the heat storage component in the hot tank 412 into the first heat exchanger 800, where it exchanges heat with the condensate in the first pipe 713, converting the condensate into high-temperature, high-pressure steam.

[0078] Both the cold tank 411 and the hot tank 412 adopt a cylindrical design to maximize storage space. To ensure the stability of the heat storage components, both the cold tank 411 and the hot tank 412 are generally made of corrosion-resistant and high-temperature-resistant materials. Furthermore, since the heat storage components are at a high temperature in the hot tank 412, the hot tank 412 also includes an insulation layer to reduce heat loss.

[0079] In this embodiment, the heat storage element is molten salt. Molten salt has extremely high thermal and chemical stability, and can exist stably at high temperatures for a long time without decomposition or chemical reaction with other substances. At the same time, molten salt has high heat capacity and thermal conductivity, which can quickly absorb and store a large amount of heat energy, and can quickly transfer heat energy to other media to achieve efficient heat exchange.

[0080] It should also be noted that the choice of thermal storage element is not limited to molten salt. Thermal storage elements can be selected adaptively according to timely needs, and this embodiment does not impose any restrictions on this.

[0081] By adopting the above technical solution, the solar thermal power generation system provided in this embodiment can efficiently utilize the heat energy collected by the collector 300, and realize the storage and conversion of heat energy through the circulation component 400, thus ensuring a stable supply of heat energy and reliable operation of the system.

[0082] Furthermore, in an optional embodiment, the circulation assembly 400 further includes a fourth conduit 417, the two ends of which are connected to the hot tank 412 and the cold tank 411, respectively.

[0083] Specifically, in this embodiment, the second circulation pump 414 is installed on the fourth pipeline 417. The second circulation pump 414 is used to pump the heat storage component in the hot tank 412 into the fourth pipeline 417 for heat exchange. After cooling, the heat storage component enters the cold tank 411 along the fourth pipeline 417, thereby realizing the circulation of the heat storage component and ensuring the effective utilization of the heat storage component and the continuous operation of the system.

[0084] Furthermore, in an optional embodiment, both the first pipe 713 and the fourth pipe 417 are disposed through the first heat exchanger 800.

[0085] Specifically, in this embodiment, the heat storage element in the fourth pipeline 417 exchanges heat with the condensate in the first pipeline 713 through the first heat exchanger 800, causing the condensate in the first pipeline 713 to be converted into a steam state. At this time, the temperature of the heat storage element in the fourth pipeline 417 decreases, and the cooled heat storage element enters the cold tank 411 along the fourth pipeline 417, thereby realizing the circulation of the heat storage element and ensuring the effective utilization of the heat storage element and the continuous operation of the system.

[0086] In an optional embodiment, the circulation assembly 400 further includes a fourth circulation pump, which is disposed on the fourth pipeline 417, for providing power to the heat storage element to ensure that the cooled heat storage element can flow smoothly into the cold tank 411. In addition, the provision of a third circulation pump 419 not only ensures the continuity of the flow of the heat storage element, but also enables precise control of the flow rate and velocity, thereby optimizing the thermal energy circulation.

[0087] Furthermore, in an optional embodiment, the circulation assembly 400 further includes a fifth pipeline 418 and a third circulation pump 419, wherein the fifth pipeline 418 is connected to the cold tank 411 and the hot tank 412 respectively, and the third circulation pump 419 is disposed on the fifth pipeline 418.

[0088] In this embodiment, the fifth pipeline 418 is connected to the cold tank 411 and the hot tank 412 respectively. When the heat storage component is insufficient, the fifth pipeline 418 and the third circulation pump 419 work together to circulate and store heat.

[0089] Specifically, when the heat of the heat storage component in the hot tank 412 is lower than the preset value, the third circulation pump 419 is turned on, driving the heat storage component from the hot tank 412 into the cold tank 411 through the fifth pipeline 418 for mixing. Then, the heat storage component in the cold tank 411 enters the collector 300 through the riser pipeline 415 to accumulate heat and re-enter the hot tank 412. If the preset value is still not reached, the circulation heat storage is repeated until the temperature of the heat storage component in the hot tank 412 reaches the preset value.

[0090] By adopting the above technical solution, this embodiment enables the circulation component 400 to circulate and store heat when the temperature does not reach the preset value, thus achieving effective utilization of heat.

[0091] Meanwhile, this embodiment enables the indirect air-cooled solar thermal power generation system to flexibly adjust its heat reserves according to actual needs through circulating heat storage, so as to adapt to different working environments and load changes and always maintain a high-efficiency and stable operating state.

[0092] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0093] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A solar thermal power generation system with indirect air cooling and heat collection, characterized in that, include: Mirror fields are used to concentrate direct sunlight from the sun; An air-cooled tower is located at the center of the mirror field; A solar collector is installed at the top of the air-cooled tower. The solar collector is used to collect the direct solar radiation gathered by the mirror field and convert it into heat energy. A circulation assembly is disposed within the air-cooled tower and connected to the solar collector. The circulation assembly includes: a cold tank connected to the solar collector via an ascending pipe, wherein a heat storage device is disposed within the cold tank; a hot tank connected to the solar collector via a descending pipe; and a fourth pipe, wherein both ends of the fourth pipe are connected to the hot tank and the cold tank, respectively. Vibration-resistant components are disposed below the solar collector; Steam generating components; An indirect air-cooled assembly includes a condenser and a condensate pump, both of which are located outside the air-cooled tower. The condenser is connected to the steam generating assembly via a first pipeline and a second pipeline, and the condensate pump is located on the first pipeline. Both the first pipeline and the fourth pipeline pass through the first heat exchanger. A first heat exchanger is disposed on the first pipeline and connected to the circulation assembly; The heat storage element in the fourth pipeline exchanges heat with the condensate in the first pipeline through the first heat exchanger, causing the condensate in the first pipeline to be converted into a vapor state. The temperature of the heat storage element in the fourth pipeline decreases, and the cooled heat storage element enters the cold tank along the fourth pipeline. The first pipeline includes a liquid inlet section and a steam inlet section. The two ends of the steam inlet section are connected to the first heat exchanger and the steam generating assembly, respectively. The two ends of the liquid inlet section are connected to the condenser and the first heat exchanger, respectively.

2. The indirect air-cooled solar thermal power generation system according to claim 1, characterized in that, The indirect air-cooling assembly also includes a circulation pipeline connected end to end, wherein the circulation pipeline is partially installed inside the condenser to cool the steam inside the condenser.

3. The indirect air-cooled solar thermal power generation system according to claim 2, characterized in that, The indirect air-cooling assembly also includes a circulating liquid pump, which is installed on the circulation pipeline.

4. The indirect air-cooled solar thermal power generation system according to claim 1, characterized in that, The indirect air-cooling assembly also includes a third pipeline and a second heat exchanger. The two ends of the third pipeline are connected to the liquid inlet section and the steam inlet section, respectively. Both the third pipeline and the circulation pipeline pass through the second heat exchanger.

5. The indirect air-cooled solar thermal power generation system according to any one of claims 1-4, characterized in that, The steam generating assembly includes: The steam turbine is connected to the indirect air-cooling assembly via the first pipeline and the second pipeline; A generator is connected to the steam turbine.

6. The indirect air-cooled solar thermal power generation system according to any one of claims 1-4, characterized in that, The loop component includes: A first circulation pump is installed on the cold tank, and the first circulation pump is used to pump the heat storage component into the riser pipeline. A second circulation pump is installed on the heat tank, and the second circulation pump is used to pump the heat storage element into the first heat exchanger.

7. The indirect air-cooled solar thermal power generation system according to claim 6, characterized in that, The circulation assembly also includes a fifth pipeline and a third circulation pump. The fifth pipeline is connected to the cold tank and the hot tank respectively, and the third circulation pump is disposed on the fifth pipeline.

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