WO2019232917A1

WO2019232917A1 - Curved light-concentrating reflector and processing system thereof, and light-concentrating reflector set and manufacturing method thereof

Info

Publication number: WO2019232917A1
Application number: PCT/CN2018/099407
Authority: WO
Inventors: 许养新
Original assignee: Xu Yangxin
Priority date: 2018-06-05
Filing date: 2018-08-08
Publication date: 2019-12-12

Abstract

A curved light-concentrating reflector, a processing system of a curved light-concentrating reflector, and a light-concentrating reflector set and a manufacturing method thereof. In a process of manufacturing the curved light-concentrating reflector, a conventional mold is not required. Instead, a calculation operation is performed according to the actual light-concentrating distance in a project so as to obtain a curvature of a current curved light-concentrating reflector which achieves the optimal light concentration effect required by a user. An NC machining apparatus is used to perform cutting so as to obtain a load-bearing structure (2) having the curvature. A reflection layer (1) having a preset rigidity is fixedly bonded to the load-bearing structure serving as a shaping mold to obtain a curved light-concentrating reflector. The curved light-concentrating reflector set is formed by connecting multiple light-concentrating reflectors. Curvatures of the respective curved light-concentrating reflectors are calculated and assigned on the basis of the overall curvature of the curved light-concentrating reflector set and according to locations at which the respective curved light-concentrating reflectors are connected. The invention is applicable to a heliostat in a solar power tower, thereby effectively increasing utilization of solar thermal energy, and accordingly increasing solar thermal power generation efficiency.

Description

Curved condenser mirror and processing system, condenser mirror group and preparation method thereof

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 5, 2018, with an application number of 201810568784.6, and the invention name is "Curve Condenser and Processing System, Condensing Mirror Group and Method of Making" , The entire contents of which are incorporated herein by reference; and

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 5, 2018, with an application number of 201820860968.5, and a utility model name of "a curved condenser and its combination and a curved condenser processing system" , The entire contents of which are incorporated herein by reference.

Technical field

The embodiments of the present invention relate to the technical field of solar photothermal power generation, and in particular, to a curved condenser mirror, a curved condenser mirror processing system, a curved condenser mirror group, and a preparation method thereof.

Background technique

With the increasing consumption of conventional energy (such as petroleum, coal and other fossil energy sources), the environmental pollution caused by the consumption of conventional energy is becoming more and more serious, and the reserves of conventional energy are limited, which promotes new energy (Such as solar energy, wind energy, ocean energy, etc.). Solar energy, as an environmentally friendly, safe, extensive and sufficient renewable new energy source, is the most promising green energy source.

Solar thermal power generation uses large-scale array reflective mirrors to collect solar thermal energy, provides steam through a heat exchange device, and combines traditional turbine-generator technology to achieve power generation. Tower solar thermal power generation, due to its large scale, high heat collection temperature, and storage capacity. Strong ability and most potential for development. Solar tower power generation uses a tower system. There are multiple heliostats on a large area. Each heliostat is equipped with a heliostat to accurately reflect sunlight on the collector on top of the high tower. . The heat collector converts the absorbed solar energy into heat energy, and then transfers the heat energy to the working fluid. The heat exchanger provides steam to drive the steam turbine to drive the generator, and finally outputs it in the form of electrical energy. It is mainly composed of concentrating subsystem, heat collecting subsystem, heat exchange subsystem, heat storage subsystem, and power generation subsystem. In the concentrating subsystem (heliostat system) of the tower-type solar thermal power generation, a micro-curvature helio-condensing mirror or a plane mirror with zero curvature is generally used.

For the application of flat mirrors and their combinations in heliostat systems, due to the divergence angle of the sunlight reflected by the flat mirrors and their combinations towards the heat collector, the farther the distance (usually 100-1500m), the more serious the loss of divergence, Attenuates the light-gathering effect of the entire heliostat system and reduces the efficiency of solar thermal power generation.

For micro-curvature condenser mirrors, currently, a high-temperature thermal deformation manufacturing process is used to deform a flat mirror or a flat glass to manufacture a curved mirror. This process requires the use of a mold to process the curved mirror. The high-temperature thermal deformation manufacturing process first heats the glass to a softened state, and then forms and tempers it in a mold. After forming, the glass blank is then coated with a reflective layer and a protective layer, and completely depends on the mold. A pair of molds only corresponds to a curved surface. Curved mirrors, because the focusing distance of the mirror field distribution is different, the focusing effect will be correspondingly reduced, and the manufacturing cost is high; In addition, the curved mirrors prepared by this process and pre-customized due to the principle of thermal expansion and contraction or internal stress Compared with the usual size, slight deformation will occur, the accuracy of the prepared curved mirror is low, and the light condensing effect is not good, which is not conducive to improving the efficiency of solar thermal power generation.

Summary of the Invention

The purpose of the embodiments of the present invention is to provide a curved condenser mirror, a curved condenser mirror processing system, a curved condenser mirror group and a preparation method thereof, which can be applied to a heliostat in a tower solar photovoltaic power station , Effectively improve the utilization efficiency of solar thermal power, and then improve the power generation efficiency of solar thermal power stations.

To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

An aspect of the embodiments of the present invention provides a curved condenser mirror, which includes a reflective layer having a preset hardness and a concave bearing structure having a target curved surface curvature;

The radian of the target curved surface of the concave bearing structure is made based on the cutting data calculated according to the actual focusing distance of the project; the focusing distance is the distance between the curved condenser and the collector of the tower solar thermal power station The cutting processing data is data for controlling a numerical control processing machine to cut and process the core material of the structure to be carried to have the target surface arc;

The reflection layer is fixedly and closely attached to the concave surface of the concave bearing structure, so that the curvature of the curved surface of the reflection layer is the same as the curvature of the curved surface of the concave bearing structure; the reflection layer is used to reflect incident sunlight. To the collector.

Optionally, the concave bearing structure is a honeycomb core material structure having the target curved surface arc.

Optionally, it further includes a first adhesive layer for bonding the reflective layer and the concave bearing structure into one body.

Optionally, a bottom plate having a planar structure is further included, the bottom plate is in close contact with the lower surface of the concave bearing structure, and the lower surface of the concave bearing structure is a surface opposite to the concave surface of the reflective layer.

Optionally, it further includes a second adhesive layer for bonding the bottom plate and the concave bearing structure into one body.

Optionally, the reflective layer includes a reflective film layer and a substrate, and the reflective film layer is disposed on the substrate, and the substrate is a plate structure having a predetermined hardness and a predetermined thickness.

Optionally, the reflective film layer is plated on the back of the substrate, and further includes a first protective layer for protecting the reflective film layer, and the first protective layer is disposed on a bottom lower surface of the reflective layer.

Optionally, the reflective layer is a plate structure made of a reflective material and having a smooth surface.

Optionally, a second protective layer is further included, and the protective layer is disposed above the reflective layer.

An embodiment of the present invention also provides a processing system for a curved condensing mirror, which includes a processor, a numerically-controlled processing machine tool, and an integrated molding device;

The processor is configured to calculate a target surface radian when the surface condenser reflector reaches a preset light concentrating effect according to the actual focusing distance of the project, and generate a cutting process having the target surface radian structure according to the target surface radian. Data; the condensing distance is the distance between the curved condenser and the collector of the tower solar thermal power station;

Performing cutting processing on the core material of the load bearing structure to be processed according to the cutting processing data input by the processor to prepare a concave bearing structure having the target curved surface;

The integrated molding device fixes the reflective layer tightly against the concave surface of the concave bearing structure, so that the reflective layer and the concave bearing structure have the same curved surface arc to prepare the curved condenser mirror.

According to another aspect of the embodiments of the present invention, a curved condensing mirror group is provided, which is formed by combining a plurality of sub-curved condensing mirrors in a preset arrangement order;

The sub-surface radians of the sub-surface condenser mirrors are the same as the surface radians of the corresponding areas in the overall surface radian, so that when the sub-surface condenser mirrors are combined in the preset arrangement order, the corresponding sub-surface radians are stitched together. Is the radian of the overall surface;

The sub-surface radian is calculated from the overall surface radian, the preset arrangement order, and the number of sub-surface condensing mirrors, and the overall surface radian is calculated based on the actual focusing distance of the project; The light distance is the distance between the curved condenser mirror group and the collector of the tower solar thermal power station;

The sub-curve condenser mirror has a reflective layer with a predetermined hardness and a concave bearing structure. The curved surface of the concave bearing structure is a sub-curve of the sub-curve condenser mirror. The reflective layer is fixedly attached to the sub-curve. The concave surface of the concave bearing structure is such that the curvature of the curved surface of the reflective layer is the same as the curvature of the curved surface of the concave bearing structure; the reflective layer is used to reflect incident solar light to the heat collector.

Optionally, a mounting plate is further included, and the size of the mounting plate is not less than the size of the curved surface condensing mirror group, and each sub-curved surface condensing mirror is fixed to the mounting plate according to a preset arrangement order for splicing Combined into the curved condensing mirror group.

The embodiment of the present invention also provides a method for preparing a curved condensing mirror group, including:

According to the actual focusing distance of the project, when the curved focusing mirror group achieves a preset focusing effect, the overall curved surface of the curved focusing mirror group; the focusing distance is the curved focusing mirror The distance between the group and the collector of the tower solar thermal power station;

Calculate the sub-surface radians of each sub-surface condenser mirror according to the overall surface radian, the preset arrangement order, and the total number of sub-surface condenser mirrors, so that each sub-surface condenser mirror is in accordance with the preset arrangement order When combined into the curved surface condensing mirror group, the respective sub-surface radians are spliced into the overall surface radians;

According to the sub-curve radians of each sub-curve condenser mirror, the core material of the load-bearing structure to be processed is cut by using a CNC machining machine, so that the arc of each curved load-bearing structure obtained after the processing of the load-bearing structure to be processed is complete The sub-curved surface of the curved condenser mirror has the same radian, and the number of concave bearing structures is the same as the total number of the sub-curved condenser mirrors;

For each concave bearing structure, a reflective layer having a predetermined hardness is fixedly attached to the concave surface of the concave bearing structure so that the curved surface curvature of the reflective layer is the same as the curved surface curvature of the concave bearing structure. Curved condenser

The sub-curved condenser mirrors are assembled according to the preset sorting order to form the curved condenser mirror group.

The embodiment of the present invention provides a curved condenser mirror, which does not rely on traditional molds in the process of preparing a curved condenser mirror, and calculates according to different focusing distances of actual engineering projects to make the current curved condenser mirror reach the user's expectations. The curved surface radian when the best condensing effect is needed, the bearing structure with the curved surface radian is cut by a CNC machining machine, and finally the reflective layer with a predetermined hardness is fixed and bonded with the supporting structure as a similar mold to prepare a curved surface. Condensing mirror. This application replaces the use of a mold to manufacture a curved condenser mirror. The curved surface of the curved condenser mirror can be different according to the actual focusing distance. It solves the problem of the return of the mirror material after the pressure is released during the mold production process. The amount of elasticity, the amount of deformation during cooling, and the internal material of the lens body always result in the low precision of the curved surface reflector, which improves the surface accuracy of the curved surface reflector, and eliminates the divergence of the flat mirror. The problem of serious loss has greatly improved the condensing effect of curved condensing mirrors. It is used in heliostats of tower solar thermal power stations, which can effectively improve the utilization efficiency of solar light and heat, and then effectively improve solar light and heat power generation. The power generation efficiency of the station reduces the input cost of the entire solar thermal power station and has good social and economic benefits.

An embodiment of the present invention provides a curved surface condensing mirror group. Firstly, the overall curved surface of the curved surface when the curved surface condensing mirror group achieves the best condensing effect required by the user is calculated from the condensing distance of the actual project. The overall curvature of the curved surface and the pre-designed arrangement order of the sub-surface condenser mirrors are uniformly assigned to the surface radians of the corresponding areas assigned by the sub-surface condenser mirrors as the sub-surface radians of each sub-mirror. Method for preparing condensing mirrors Each sub-curved condensing mirror is prepared, and finally assembled into an entire curved condensing mirror group. The technical solution of the present application calculates the radian of each submirror in the mirror group as a whole, and integrates the respective surfaces of the submirrors into a unified large curved surface. The radian of this surface is the radian that makes the entire mirror group achieve the best condensing effect. The reflected light beams of the sub-mirrors are aggregated into a single beam and concentrated to be reflected by the light-collecting device, which solves the problem that the larger the combined area of each sub-mirror is, the larger the loss of light divergence is, which greatly improves the concentration of the entire curved condenser mirror group. Light effect, used in heliostats of tower solar thermal power stations, a new solar reflector device that can be manufactured in large quantities and can combine several sub-mirrors into a unified large curved surface to concentrate light, improving solar light The heat utilization efficiency can effectively improve the power generation efficiency of solar CSP stations, and can also reduce the number of sun-tracking control agencies, thereby further reducing the overall cost of the entire tower CSP station, which has good social and economic benefits.

In addition, the embodiments of the present invention also provide corresponding processing systems and preparation methods for curved surface condensing mirrors and combinations thereof, which further makes the curved surface condensing mirrors and combinations thereof more practical and feasible. The method for preparing a light reflecting mirror group and the curved surface reflecting mirror processing system have corresponding advantages.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely Some embodiments of the present invention, for those skilled in the art, can obtain other drawings according to these drawings without paying creative labor.

1 is a schematic structural diagram of a specific implementation manner of a curved condenser mirror according to an embodiment of the present invention;

2 is a schematic diagram of a processing process of processing a core material of a load-bearing structure according to an embodiment of the present invention;

3 is a schematic structural diagram of a honeycomb core material according to an embodiment of the present invention;

4 is a structural diagram of a specific implementation manner of a processing system for a curved condenser mirror according to an embodiment of the present invention;

5 is a structural diagram of a specific implementation manner of a curved condenser mirror group according to an embodiment of the present invention;

6 is a schematic diagram of a calculation process of a schematic example provided by an embodiment of the present invention;

FIG. 7 is a schematic flowchart of a method for manufacturing a curved condenser mirror group according to an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", and the like in the description and claims of the present application and the above-mentioned drawings are used to distinguish different objects, not to describe a specific order . Furthermore, the terms "including" and "having" as well as any of them are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device containing a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

After the technical solutions of the embodiments of the present invention are introduced, various non-limiting implementation manners of the present application are described in detail below.

First, referring to FIG. 1, FIG. 1 is a schematic structural diagram of a specific implementation manner of a curved condenser mirror according to an embodiment of the present invention. An embodiment of the present invention may include the following contents:

The curved condensing mirror may include a reflective layer 1 and a concave bearing structure 2. For example, the condensing mirror may be used in a heliostat system with a solar thermal power station (such as a tower solar thermal power station).

The reflection layer 1 has a preset hardness and can reflect incident sunlight to a target point (focus). For example, when applied to a tower solar thermal power station, the reflection layer 1 can reflect sunlight to the heat collection on the top of the tower Device.

The reflective layer 1 can be composed of a reflective film layer and a substrate. The reflective film layer is disposed on the substrate. The substrate is a layer structure with a predetermined hardness and a predetermined thickness. For example, a conventional reflector is plated on the back of an optical glass (substrate). A thin film (reflective film) of metallic silver or aluminum. The reflective material of the reflective film layer may be any material capable of reflecting incident light, which is not limited in this application. The substrate can be any structure with a certain hardness and thickness. The thickness and hardness parameters can be selected according to the actual situation. The application does not limit the specific preparation materials. For example, the substrate can be a rigid thin plate such as optical glass or metal plate. .

Specifically, the reflective film layer is disposed at the position of the substrate, which can be determined according to the reflective characteristics of the reflective film layer and the material of the substrate. For details, refer to the prior art. When the reflective film layer is plated on the back of the substrate, such as a conventional reflector, in order to protect the reflective film layer on the mirror back from being scratched off and corroded, a first protective layer for protecting the reflective film layer may also be included. The protective layer is disposed on the bottom lower surface of the reflective layer, that is, the first protective layer is disposed above the reflective film layer, so as to play a protective role. The material and structure of the first protective layer can be selected by those skilled in the art according to the actual situation. Neither will affect the realization of this application. For example, a copper layer + 3 layers of protective lacquer can be coated on the mirror back of the mirror as the first protective layer to protect the reflective film layer of the mirror.

In addition, in another embodiment, the reflective layer 1 may be a plate structure made of a reflective material and having a smooth surface. That is to say, the reflective layer 1 can be directly made of a reflective material into a structure with a certain hardness and a certain thickness, and then the surface of the structure is polished to be similar to the smoothness of the mirror surface (or the same as the mirror surface roughness value or not much different, but Using a surface roughness tester to measure the smoothness of the surface) can reflect the light incident on the surface and has good reflection efficiency. For example, the surface of an aluminum plate can be polished to be as smooth as a mirror surface to be used as the reflective layer 1.

In order to further protect the reflective layer 1 from friction, corrosion, and adhesion of foreign objects (such as dust), a second protective layer may be provided above the reflective layer 1, such as a glass cover plate. The material and structure of the second protective layer can be selected by those skilled in the art according to the actual situation, which does not affect the implementation of the present application.

The concave bearing structure 2 is a structure having a curvature of a target curved surface, and forms a stress structure with the reflective layer 1. Optionally, the concave bearing structure 2 may be composed of an upper surface with a target curved surface and a lower surface (horizontal surface) without curvature. Of course, in some special scenes, the lower surface may also be a surface with a slight curvature. Does not affect the realization of this application.

The radian of the target curved surface of the concave bearing structure 2 is the value of the radian parameter when the curved condensing mirror achieves the best condensing effect, which can be calculated according to the actual condensing distance of the project. For a specific calculation process, refer to the prior art. For example, refer to the calculation process of the curvature of the existing mold surface. For example, in the application of a solar thermal power station, the focusing distance is the distance between the curved condenser and the collector of the tower solar thermal power station.

The preparation process of the concave bearing structure 2 may be:

The material for preparing the concave bearing structure 2 is the core material of the bearing structure to be processed. After the target surface radian is calculated, the target surface arc and the structural parameters of the bearing structure core material (the length, width, and height of the bearing structure core material to be processed) are calculated. Etc.) Calculate the cutting data. The cutting data is used to control the CNC machining machine to cut the bearing structure into the target surface arc, that is, to cut the core material of the to-be-processed bearing structure into a concave bearing structure with the target surface arc. Location, cutting depth, and more. The machining data can be input to the CNC machining machine, and the CNC machining machine (such as planer, grinder) can process the core material of the load-bearing structure to be concave bearing structure 2 according to the input cutting data. Deeper and shallower, the height of the entire concave bearing structure 2 changes in an arc. Please refer to Figure 2. Since the cutting data is continuous data, the processed surface must also be a continuous, smooth surface, which is formed by CNC machining. The surface will not be deformed, and there is no internal stress, which can effectively improve the machining accuracy of the surface.

The light collecting distance is a straight line distance from the reflector to the light collecting and collecting device. The calculation of surface radians can use the curve and surface equations deduced from geometric optics knowledge. The final result of the calculation is an array, whose content is the cutting depth of each point on the plane, and each point can be represented by its plane coordinates X and Y. For example, if the length * width of the curved condenser mirror is 140cm * 100cm, the width of the planer blade is 1cm, and each small area of 1cm * 1cm is used as a point (equivalent to the pixel of photography), then 140 * is required to be calculated. The 100 depth values are called "arrays". Enter this array into the CNC planer, set the vertical planing, and move 1cm each time, you need to go 50 times back and forth according to the length of 140cm. The finer the "pixel", the higher the accuracy. The “pixels” are related to the precision of the planer and to the requirements of production efficiency.

After the concave bearing structure 2 is prepared, the reflective layer 1 is fixedly attached to the concave surface of the concave bearing structure, and the concave bearing structure 2 can be used as a similar mold, so that the reflective layer 1 changes shape and closely adheres to the concave bearing structure 2 The curved surface has the same curvature as the concave bearing structure 2, and the two form a whole as a curved condenser mirror.

In a specific embodiment, the concave bearing structure 2 and the reflective layer 1 can be integrated into one by an adhesive compounding process, that is, a first adhesive layer is further included between the concave bearing structure 2 and the reflective layer 1. Of course, of course It is also possible to use other processes to fix the reflective layer 1 on the concave bearing structure 2 and form the same curved surface as the concave bearing structure 2, which does not affect the implementation of the present application.

The core material for preparing the concave bearing structure 2 can be any kind of material, such as a corrugated core material. Optionally, the honeycomb core material has the highest stress-weight ratio (light weight, high strength) and the smallest amount of cutting processing. It is beneficial to resist wind load and other advantages. The core material for preparing the concave bearing structure 2 can be a honeycomb core material. Please refer to FIG. 3, that is, the core material of the load bearing structure to be processed can be a honeycomb core material. Due to the low hardness of the honeycomb core material, in order to form a stress-resistant structure with good compression and bending resistance, a "sandwich" stress-resistant structure can be used, which is composed of three parts. The honeycomb core material is used as a sandwich structure, and the upper and lower layers can be combined into a flat plate with high compression and bending resistance. The concave bearing structure 2 can be a honeycomb core material with a target curved surface and a lower layer disposed below it. The thin plate and the lower layer plate may be any plate having a certain hardness and thickness, which is not limited in this application. The reflective layer 1 can be used as an upper layer sheet. After the honeycomb core material itself forms a curved surface, it can be used as a mold in the bonding and compounding process. Under the dual effects of external air pressure and adhesive force, the reflective layer 1 is forced to change its shape and interact with the honeycomb. The core material has the same curved surface. After the composite process is completed, the three-layer structure is integrated into a stable "sandwich" stress structure.

In another embodiment, a bottom plate may also be included. The bottom plate may be a hard plate made of one material, or a hard plate made of multiple materials. For example, it may be only one layer of metal aluminum alloy plate, or It is a combination of glass plate + aluminum alloy plate, which is not limited in this application.

The bottom plate can be used as a mounting plate. The thickness and hardness of the bottom plate can meet the requirements of actual use. For example, the thickness of the bottom plate can be set to 0.6-1.0mm. In order to facilitate on-site installation and debugging, the bottom plate may be a flat structure. Of course, the shape of the bottom plate may also be determined according to specific actual conditions, which is not limited in this application.

The bottom plate is in close contact with the lower surface of the concave bearing structure 2, and the lower surface of the concave bearing structure 2 is a surface opposite to the concave surface of the reflective layer 1. Optionally, the bottom plate and the concave bearing structure 2 may be fixed by using an adhesive, that is, it further includes a second adhesive layer for bonding the bottom plate and the concave bearing structure 2 together.

In the technical solution provided by the embodiment of the present invention, the traditional mold is not relied on in the process of preparing the curved surface condenser, and the current curved surface reflector is calculated according to the different focusing distances of the actual project to achieve the best required by the user. The curvature of the curved surface during the focusing effect is cut by a CNC machining machine to obtain a bearing structure with the curved surface. Finally, a reflective layer with a predetermined hardness is fixed and bonded with the bearing structure as a similar mold, thereby preparing a curved surface reflecting reflection. mirror. This application replaces the use of a mold to manufacture a curved condenser mirror. The curved surface of the curved condenser mirror can be different according to the actual focusing distance. It solves the problem of the return of the mirror material after the pressure is released during the mold production process. The amount of elasticity, the amount of deformation during cooling, and the internal material of the lens body always result in the low precision of the curved surface reflector, which improves the surface accuracy of the curved surface reflector, and eliminates the divergence of the flat mirror. The problem of serious loss has greatly improved the light-gathering effect of curved light-condensing mirrors. Application in heliostats of tower-type solar thermal power stations can effectively improve the utilization efficiency of solar light and heat, and thus effectively improve solar thermal power stations The efficiency of power generation reduces the input cost of the entire solar thermal power station and has good social and economic benefits.

The embodiment of the present invention also provides a corresponding processing system for the curved condenser mirror, which further makes the curved condenser mirror more feasible. The following describes a curved condenser processing system provided by an embodiment of the present invention. The curved condenser processing system described below and the curved condenser described above can correspond to each other.

A processing system for a curved condensing mirror, please refer to FIG. 4, which may specifically include:

The processor 41, the numerical control processing machine tool 42, and the integrated molding device 43.

The processor 41 is connected to the NC processing machine tool 42 and is used to calculate the target surface radian when the surface condenser reflector reaches the preset focusing effect according to the actual focusing distance of the project, and generates and prepares the target surface radian structure according to the target surface radian. Cutting processing data; the focusing distance is the distance between the curved condenser and the collector of the tower solar thermal power station.

The numerical control processing machine tool 42 performs cutting processing on the core material of the processing load-bearing structure according to the cutting processing data input by the processor to prepare a concave load-bearing structure having a target curved surface arc.

The numerical control processing machine tool 42 can be any kind of processing machine tool, such as a planer, and this does not affect the implementation of the present application.

In a specific embodiment, when there is no processor 41, data can also be manually input between the two, so that the data input by the numerical control processing machine tool 42 can complete the cutting process.

The integrated molding device 43 can fix the reflective layer 1 closely to the concave surface of the concave bearing structure 2 so that the reflective layer and the concave bearing structure have the same curved surface arc to prepare a curved condenser mirror.

The one-piece forming device 43 corresponds to a process that changes the shape of the reflective layer 1 and closely adheres to the curved surface of the concave bearing structure 2 to form the same curved surface as the concave bearing structure 2, that is, a tool used to implement the process or any Kind of device.

It can be known from the above that the curved surface condensing mirror prepared in the embodiment of the present invention has high curved surface processing accuracy, can improve the utilization efficiency of solar light and heat, and thus effectively improves the power generation efficiency of the solar light and heat power station.

Solar thermal power stations generally require more than 100,000 square meters of reflectors, and a sun-tracking control mechanism is arranged under each reflector to form a heliostat system. Due to the limitation of the manufacturing process, the use of materials, and the transportation conditions of curved focusing mirrors, it is often necessary to assemble multiple curved focusing mirrors (submirrors) on site to form a large curved condenser mirror group, such as a small rectangular submirror assembly. Into a large rectangular mirror group, such as 5 * 7 blocks. For each sub-mirror is a plane focusing mirror, only a piece of sub-mirror can be used. However, for mirrors with micro-curvature, several sub-beams parallel to the optical axis reflected by a simple assembly are relatively dispersed, and if the method of adjusting the angle of each sub-mirror is extremely difficult to manufacture and install, that is, It is said that each of the sub-surface condenser mirrors condenses light separately, 5 * 7 blocks reflect 35 parallel beams, and the focus is not concentrated enough, and the larger the combined area of each sub-mirror, the greater the loss of light divergence.

In view of this, the present application also provides a curved condensing mirror group, for example, a heliostat system that can be applied to a solar thermal power station (tower solar thermal power station). Please refer to FIG. 5 for details. include:

The curved surface condensing mirror group can be composed of multiple sub curved surface condensing mirrors, and each sub curved surface condensing mirror is combined in a preset arrangement order to form an overall continuous curved mirror group. The position, number, and sorting order of each sub-mirror in the curved condensing mirror group can be determined according to the specific application scenario, which is not limited in this application.

The sub-surface radians of each sub-surface condenser mirror are assigned from the surface radians of the overall mirror group according to its arrangement position, that is, the sub-surface radians of each sub-surface condenser mirror correspond to the overall surface radians. The surface radians of the regions are the same, so that when the sub-surface condenser mirrors are combined in a preset arrangement order, the corresponding sub-surface radians can be stitched into the overall surface radian. The radian of the entire curved surface is calculated according to the actual focusing distance of the project, so that the parallel solar rays incident on the curved condenser mirror group can be condensed to reflect a focused beam. The focusing distance is the distance between the curved condenser mirror group and the collector of the tower solar thermal power station. The calculation process of the radian of the overall surface can be calculated by using geometrical optics knowledge in combination with the existing technology. The specific calculation process will not be repeated here.

The sub-surface condenser mirror has a predetermined hardness of the reflective layer and a concave bearing structure. The curvature of the curved surface of the concave bearing structure is the sub-curve of the sub-surface condenser mirror. The reflective layer is fixedly attached to the concave surface of the concave bearing structure. The curvature of the curved surface of the reflective layer is the same as the curvature of the curved surface of the concave bearing structure; the reflective layer is used to reflect incident sunlight to the collector.

The sub-surface radian can be calculated from the overall surface radian, the preset arrangement order and the number of sub-surface condenser mirrors. The surface of each sub-surface condenser reflector is part of the overall surface. The curvature of the surface is different depending on the position. The specific calculation The process can refer to basic mathematical knowledge (such as the surface and its equations in advanced mathematics). In order to make those skilled in the art understand the technical solution of this application more clearly, the following describes the process with a specific calculation process:

The curved condenser mirror group is assembled from 15 sub-curved condenser mirrors. Please refer to Figure 6. The size of each sub-curved condenser mirror is 1.4 meters * 2.5 meters, 5 rows and 3 columns, and the total width is 2.5 * 3 = 7.5 meters, total height 1.4 * 5 = 7 meters. Number 3 * 5 = 15 sub-surface condenser mirrors from left to right and top to bottom (1 # to 15 #), with the 8th sub-mirror as the center position.

When the focusing distance is determined, the cutting depth is a function of the coordinates of each point, and the 7.5 * 7m curved condenser mirror group is taken as a whole. When the pixel is 1cm * 1cm, 750 * 700 = 525000 data can be calculated. According to the basic knowledge of mathematics, for the entire continuous smooth surface, the adjacent data is gradual, and this 525,000 data corresponds to 525,000 points in 7.5 * 7m. In order to facilitate the calculation, a two-dimensional coordinate system is established. At X = -1.25 to + 1.25m and Y = -0.7 to + 0.7m, 250 * 140 = 35000 data columns are array No. 8, which is the number 8 child. The curved surface data of the sub-curved surface of the curved condenser mirror. The core material processed according to this array data is the load-bearing structural core material of the No. 8 sub-surface condenser mirror, which is compounded into a No. 8 sub-surface condenser mirror. No. 8 sub-mirror is a curved surface with a symmetrical center and a concave center and a slightly higher periphery. Then the data of X = -3.75 to -1.25m and Y = + 2.10 to + 3.50m are listed as array No. 1. According to the above method, a sub-surface condenser mirror No. 1 and a sub-number No. 1 are prepared. The mirror is a curved surface with upper left and lower right. According to the above method, the sub-curve radians of the 15 sub-surface condenser mirrors are sequentially obtained. According to the method of the embodiment of the above-mentioned curved surface condenser mirror, 15 sub-surface condenser mirrors are prepared, and finally assembled in a sequence as shown in FIG. 6 to be continuous. And smooth overall curved surface, a curved condenser lens group is prepared.

It should be noted that, for each sub-surface condenser mirror, the sub-surface radian is the target surface radian in the above-mentioned surface condenser reflector embodiment, that is, the target surface radian of the concave bearing structure is the corresponding sub-surface surface. The sub-surface radian of the light reflector, except that the surface radian of the curved focusing mirror is not calculated according to the description in the above embodiment, the structure of the sub-surface condenser mirror can be the curved condenser as described in any one of the preceding items; each For the structure and processing method of each sub-curve condenser mirror, reference may be made to the description of the above-mentioned curved condenser mirror and its processing system embodiment, which will not be repeated here.

Optionally, in a specific implementation manner, it may further include a mounting plate, and the size of the mounting plate is not smaller than the size of the curved condenser mirror group, and each sub-curved condenser mirror is fixed on the mounting plate in a preset arrangement order. On the other hand, the stitching combination is used to form a curved condenser mirror group.

Each sub-curve condensing mirror can be fixed to the fixing plate next to each other by an adhesive (such as glue) in order, or it can be fixed to the fixing plate by using a fastener. The specific fixing method is not limited in this application. However, it should be reminded that to avoid deformation of the sub-surface condensing mirrors, welding cannot be used for fixing.

As can be seen from the above, the embodiment of the present invention first calculates the overall surface radian when the surface condenser mirror group achieves the best light condensing effect required by the user from the focusing distance of the actual engineering project. The calculated overall surface radian is used in advance and The arrangement order of the designed sub-surface condenser mirrors is uniformly assigned to the surface radians of the corresponding areas assigned by the sub-surface condenser mirrors as the sub-surface radians of each sub-mirrors. Each sub-curved condenser mirror is prepared, and finally assembled into an entire curved condenser mirror group. The technical solution of the present application calculates the radian of each submirror in the mirror group as a whole, and integrates the respective surfaces of the submirrors into a unified large curved surface. The radian of this surface is the radian that makes the entire mirror group achieve the best condensing effect. The reflected light beams of the sub-mirrors are aggregated into a single beam and concentrated to be reflected by the light-collecting device, which solves the problem that the larger the combined area of each sub-mirror is, the larger the loss of light divergence is, which greatly improves the concentration of the entire curved condenser mirror group. Light effect, used in heliostats of tower solar thermal power stations, a new solar reflector device that can be manufactured in large quantities and can combine several sub-mirrors into a unified large curved surface to concentrate light, improving solar light The heat utilization efficiency can effectively improve the power generation efficiency of solar CSP stations, and can also reduce the number of sun-tracking control agencies, thereby further reducing the overall cost of the entire tower CSP station, which has good social and economic benefits.

The embodiment of the present invention also provides a corresponding manufacturing process method for the curved condenser mirror group, which further makes the curved condenser mirror group more feasible. The following describes the preparation method of the curved condenser mirror group provided by the embodiment of the present invention. The method for preparing the curved condenser mirror described below is the same as that of the curved condenser mirror, the curved mirror group, and the curved condenser mirror described above. Processing systems can be cross-referenced.

Please refer to FIG. 7. FIG. 7 is a schematic flowchart of a method for preparing a curved condensing mirror group according to an embodiment of the present invention. Embodiments of the present invention can be applied to, for example, a tower-type solar thermal power station, and specifically include the following: content:

S701: Calculate the radian of the entire surface of the curved surface condensing reflector group when the curved surface converging reflector group reaches the preset condensing effect according to the actual focusing distance of the project.

The focusing distance is the distance between the curved condenser mirror group and the collector of the tower solar thermal power station.

S702: Calculate the sub-surface radians of the sub-surface condenser mirrors according to the overall surface radians, the preset arrangement order, and the total number of sub-surface condenser mirrors, so that the sub-surface condenser mirrors are combined in a preset arrangement order as When the surface condenser mirror group is used, the corresponding sub-surface radians are spliced into the overall surface radians.

S703: According to the sub-surface radians of the sub-surface condenser mirrors, the core material of the load-bearing structure to be processed is cut by using a numerical control processing machine, so that the curvature and phase of each curved load-bearing structure obtained after the processing of the load-bearing structure to be processed is completed. The arcs of the sub-surfaces corresponding to the sub-surface condenser mirrors are the same.

The number of concave bearing structures is the same as the total number of sub-surface condenser mirrors.

The number of core materials of the structure to be processed can be the same as the total number of sub-surface condenser mirrors, or it can be a single piece of core material, which is cut on the same number as the total number of sub-surface condenser mirrors. Concave bearing structure, or several larger core materials, a predetermined number of concave bearing structures are cut on one core material, which does not affect the implementation of the present application.

S704: For each concave bearing structure, a reflective layer having a predetermined hardness is fixedly attached to the concave surface of the concave bearing structure, so that the curved surface curvature of the reflective layer is the same as the curved surface curvature of the concave bearing structure, and the sub-curved surfaces are prepared. Light reflector.

S705: Assemble and combine the sub-surface condenser mirrors according to a preset sorting order into a surface condenser mirror group.

It can be known from the above that in the embodiment of the present invention, the curved surfaces of all the sub-mirrors can be integrated into a unified large curved surface based on the curved (concave) focusing of each of the sub-mirrors, so that the reflected light of several sub-mirrors can be integrated into one The uniformly focused light beams are collectively reflected to the light-receiving and heat-collecting device, which further improves the utilization rate of solar energy, further improves the efficiency of solar thermal photothermal power generation, and reduces the input cost.

The embodiment of the present invention also provides a corresponding implementation device for the method for preparing a curved condenser mirror group, which further makes the method more practical. The device for preparing a curved condenser mirror group may include:

The radian calculation module is used to calculate the radian of the curved surface of the curved surface condensing reflector group when the curved condensing mirror group reaches the preset condensing effect according to the actual condensing distance of the project. The focusing distance is the distance between the curved condenser mirror group and the collector of the tower solar thermal power station.

The radian distribution module is used to calculate the sub-surface radian of each sub-surface condenser mirror according to the overall surface radian, the preset arrangement order and the total number of sub-surface condenser mirrors, so that each sub-surface condenser mirror is in accordance with a preset When the arrangement order is combined into a surface condenser mirror group, the corresponding sub-surface radians are spliced into the overall surface radians.

The sub-mirror processing module is used for cutting the core material of the load-bearing structure to be processed according to the sub-curve radian of each sub-surface condenser mirror, so that each concave bearing structure obtained after the processing of the load-bearing structure to be processed is completed. The radian of the surface is the same as the radian of the sub-surface of the corresponding sub-surface condenser mirror, and the number of the concave bearing structure is the same as the total number of the sub-surface condenser mirrors. For each concave bearing structure, a reflective layer having a predetermined hardness is fixedly attached to the concave surface of the concave bearing structure so that the curved surface curvature of the reflective layer is the same as the curved surface curvature of the concave bearing structure, and the sub-curved surfaces are collected and reflected. mirror.

The sub-mirror assembly module is used for assembling and combining the sub-surface condenser mirrors into a surface condenser mirror group according to a preset sorting order.

The functions of the functional modules of the device of the curved condensing mirror group according to the embodiment of the present invention may be specifically implemented according to the methods in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and is not repeated here. To repeat.

It can be known from the above that the embodiments of the present invention improve the utilization rate of solar energy, further improve the efficiency of solar thermal photothermal power generation, and reduce the input cost.

An embodiment of the present invention further provides a preparation device for a curved condensing mirror group, which may specifically include:

Memory for storing computer programs;

The processor is configured to execute a computer program to implement the steps of the method for manufacturing a curved condensing mirror group according to any one of the embodiments.

The functions of the functional modules of the manufacturing equipment of the curved condensing mirror group according to the embodiment of the present invention may be specifically implemented according to the methods in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and is not described here. More details.

An embodiment of the present invention also provides a computer-readable storage medium that stores a preparation program for a curved condensing mirror group, and the preparation program for the curved condensing mirror group is executed by a processor as described in any one of the foregoing embodiments. Steps of a method for preparing a curved condenser mirror group.

The functions of the functional modules of the computer-readable storage medium according to the embodiments of the present invention may be specifically implemented according to the methods in the foregoing method embodiments. For specific implementation processes, reference may be made to related descriptions of the foregoing method embodiments, and details are not described herein again.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the embodiments, refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part may refer to the description of the method.

Professionals may further realize that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the hardware and software, Interchangeability. In the above description, the composition and steps of each example have been described generally in terms of functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of the method or algorithm described in connection with the embodiments disclosed herein may be directly implemented by hardware, a software module executed by a processor, or a combination of the two. Software modules can be placed in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or in technical fields Any other form of storage medium is known.

The curved condensing mirror, the curved condensing mirror processing system, the curved condensing mirror group and the preparation method thereof provided by the present invention have been described in detail above. Specific examples are used herein to explain the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

A curved condensing mirror, characterized in that it comprises a reflective layer with a preset hardness and a concave bearing structure with a target curved surface curvature;

The radian of the target curved surface of the concave bearing structure is made based on the cutting data calculated according to the actual focusing distance of the project; the focusing distance is the distance between the curved condenser and the collector of the tower solar thermal power station The cutting processing data is data for controlling a numerical control processing machine to cut and process the core material of the structure to be carried to have the target surface arc;

The reflection layer is fixedly and closely attached to the concave surface of the concave bearing structure, so that the curvature of the curved surface of the reflection layer is the same as the curvature of the curved surface of the concave bearing structure; the reflection layer is used to reflect incident sunlight. To the collector.
The curved condenser mirror according to claim 1, wherein the concave bearing structure is a honeycomb core material structure having the target curved surface arc.
The curved condenser mirror according to claim 2, further comprising a first adhesive layer for bonding the reflective layer and the concave bearing structure into one body.
The curved condenser mirror according to claim 3, further comprising a bottom plate having a planar structure, the bottom plate being in close contact with the lower surface of the concave bearing structure, and the lower surface of the concave bearing structure is A surface opposite to the concave surface of the reflective layer.
The curved condenser mirror according to claim 4, further comprising a second adhesive layer for bonding the bottom plate and the concave bearing structure into one body.
The curved condenser mirror according to any one of claims 1 to 5, wherein the reflective layer comprises a reflective film layer and a substrate, and the reflective film layer is disposed on the substrate, and the substrate has Layer structure with preset hardness and preset thickness.
The curved condenser mirror according to claim 6, wherein the reflective film layer is plated on the back of the substrate, and further comprises a first protective layer for protecting the reflective film layer, and the first protection A layer is disposed on a bottom lower surface of the reflective layer.
The curved condenser mirror according to any one of claims 1 to 5, wherein the reflective layer is a plate structure made of a reflective material and having a smooth surface.
The curved condenser mirror according to claim 8, further comprising a second protective layer, the protective layer being disposed above the reflective layer.
A processing system for curved condensing mirrors, characterized in that it includes a processor, a numerically controlled processing machine tool, and an integrated molding device;

The processor is configured to calculate a target surface radian when the surface condenser reflector reaches a preset light concentrating effect according to the actual focusing distance of the project, and generate a cutting process having the target surface radian structure according to the target surface radian. Data; the condensing distance is the distance between the curved condenser and the collector of the tower solar thermal power station;

Performing cutting processing on the core material of the load bearing structure to be processed according to the cutting processing data input by the processor to prepare a concave bearing structure having the target curved surface;

The integrated molding device fixes a reflective layer having a preset hardness to the concave surface of the concave bearing structure, so that the reflective layer and the concave bearing structure have the same curved surface radian to prepare the curved light reflection. mirror.
A curved condensing mirror group is characterized in that a plurality of sub-curved condensing mirrors are combined according to a preset arrangement order;

The sub-surface radians of the sub-surface condenser mirrors are the same as the surface radians of the corresponding areas in the overall surface radian, so that when the sub-surface condenser mirrors are combined in the preset arrangement order, the corresponding sub-surface radians are stitched together. Is the radian of the overall surface;

The sub-surface radian is calculated from the overall surface radian, the preset arrangement order, and the number of sub-surface condensing mirrors, and the overall surface radian is calculated based on the actual focusing distance of the project; The light distance is the distance between the curved condenser mirror group and the collector of the tower solar thermal power station;

The sub-curve condenser mirror has a reflective layer with a predetermined hardness and a concave bearing structure. The curved surface of the concave bearing structure is a sub-curve of the sub-curve condenser mirror. The reflective layer is fixedly attached to the sub-curve. The concave surface of the concave bearing structure is such that the curvature of the curved surface of the reflective layer is the same as the curvature of the curved surface of the concave bearing structure; the reflective layer is used to reflect incident solar light to the heat collector.
The curved condenser mirror group according to claim 11, further comprising a mounting plate, the size of the mounting plate is not smaller than the size of the curved condenser mirror group, and each sub-curved condenser mirror is in accordance with The preset arrangement sequence is fixed on the mounting plate, and the curved condensing mirror group is assembled by splicing.
A method for preparing a curved condenser mirror group, comprising:

According to the actual focusing distance of the project, when the curved focusing mirror group achieves a preset focusing effect, the overall curved surface of the curved focusing mirror group; the focusing distance is the curved focusing mirror The distance between the group and the collector of the tower solar thermal power station;

Calculate the sub-surface radians of each sub-surface condenser mirror according to the overall surface radian, the preset arrangement order, and the total number of sub-surface condenser mirrors, so that each sub-surface condenser mirror is in the preset arrangement When combined into the curved surface condensing mirror group, the respective sub-surface radians are spliced into the overall surface radians;

According to the sub-curve radians of each sub-curve condenser mirror, the core material of the load-bearing structure to be processed is cut by using a CNC machining machine, so that the arc of each curved load-bearing structure obtained after the processing of the load-bearing structure to be processed is complete The sub-curved surface of the curved condenser mirror has the same radian, and the number of concave bearing structures is the same as the total number of the sub-curved condenser mirrors;

For each concave bearing structure, a reflective layer having a predetermined hardness is fixedly attached to the concave surface of the concave bearing structure so that the curved surface curvature of the reflective layer is the same as the curved surface curvature of the concave bearing structure. Curved condenser

The sub-curved condenser mirrors are assembled according to the preset sorting order to form the curved condenser mirror group.