Layout method and system for solar thermal power generation multi-tower one-machine light condensation field

Abstract

The invention provides a layout method and system for a solar thermal power generation multi-tower one-machine condensation field. The layout method comprises the steps that S1, the overall shape of a multi-tower mirror field is determined; s2, determining intersection points of the sub-mirror fields, and linearly connecting the intersection points; s3, combining the sub mirror fields, removing intersection connecting lines, and determining the outer edge of the multi-tower mirror field; s4, determining an edge line of each sub-mirror field; s5, splicing the sub mirror fields with the edge lines, and determining a multi-tower mirror field; s6, generating single-mirror field arrangement by using SAM software; s7, performing intersection operation on each sub-mirror field with the edge line in the step S5 and the single mirror field generated in the step S6, and determining a heliostat point location arrangement diagram of each sub-mirror field; and S8, splicing the heliostat point location arrangement diagrams of the sub-mirror fields in the S7 into a multi-tower heliostat point location arrangement diagram. Under the same condition and under the condition that the mirror field area is equal, higher mirror field efficiency is achieved, and arrangement of a multi-tower mirror field is achieved.

Description

Technical Field

[0001] The present invention relates to the field of solar thermal power generation, and particularly to a layout method and system for a multi-tower one-machine concentrating field in solar thermal power generation. Background Art

[0002] A heliostat is a very important device in the initial stage of energy conversion in a solar thermal power generation system. In a tower-type solar thermal power generation system, usually hundreds or thousands, or even tens of thousands of heliostats are used to continuously track the solar radiant energy through their respective independent or grouped control systems and focus the energy on the receiver at the top of the heat-absorbing tower. The design of the heliostat light field is one of the important links in the design of a tower-type solar thermal power generation system. There are already a considerable number of heliostat light field design software at home and abroad, such as the SENSOL software developed by SENSOR Company in Spain, the SolarPilot software developed by the National Renewable Energy Laboratory NREL in the United States, and the concentrating field design software HFLD jointly developed by the Changchun Institute of Optics, Fine Mechanics and Physics of the Chinese Academy of Sciences and the Institute of Electrical Engineering of the Chinese Academy of Sciences. All of these existing software are only applicable to the simple situation of a single tower and a single mirror field. For a tower-type solar thermal power generation system, as the area of the mirror field becomes larger and larger, the efficiency of the outermost heliostats becomes lower and lower.

[0003] Currently, in the prior art, all are layout methods for a single tower and a single mirror field, and there is no layout method for multiple towers and multiple mirror fields. By providing a layout method for multiple towers and multiple mirror fields, the present application can achieve a higher mirror field efficiency under the condition of equal mirror field area. Summary of the Invention

[0004] In order to solve the above technical problems in the prior art, the present invention particularly provides a layout method and system for a multi-tower multi-mirror field in solar thermal power generation.

[0005] To achieve the above object, the present invention provides a layout method for a multi-tower one-machine concentrating field in solar thermal power generation. The layout method includes: S1. Determine the overall shape of the multi-tower mirror field; S2. Determine the intersection points of each sub-mirror field and connect each intersection point linearly; S3. Combine each sub-mirror field, remove the intersection point connection lines, and determine the outer edge of the multi-tower mirror field; S4. Determine the edge lines of each sub-mirror field; S5. Piece together each sub-mirror field with the edge lines to determine the multi-tower mirror field; S6. Use the SAM software to generate a single mirror field layout; S7. Perform an intersection operation on each sub-mirror field with the edge lines in S5 and the single mirror field generated in S6 to determine the layout diagram of the heliostat positions in each sub-mirror field; S8. Piece together the layout diagrams of the heliostat positions in each sub-mirror field in S7 to form a layout diagram of the heliostat positions for multiple towers.

[0006] Further, in S1, determine the overall shape of the multi-tower mirror field according to the geographical location, solar radiation data, climate conditions, height of the heat-absorbing tower, size of the collector, and heliostat parameters.

[0007] Furthermore, each of the sub-mirror fields is a circular mirror field.

[0008] Furthermore, in step S7, the highest average efficiency of the mirror field is obtained through an intersection operation, thereby determining the layout diagram of the heliostat positions in each sub-mirror field.

[0009] Furthermore, in step S7, the highest energy within a given time period of the mirror field is obtained through an intersection operation, thereby determining the layout diagram of the heliostat positions in each sub-mirror field.

[0010] Furthermore, in step S7, the highest cost performance of the mirror field is obtained through an intersection operation, thereby determining the layout diagram of the heliostat positions in each sub-mirror field.

[0011] Furthermore, in step S7, a weighted average of the highest average efficiency of the mirror field, the highest energy within a given time period of the mirror field, and the highest cost performance of the mirror field is performed, and through an intersection operation, the layout diagram of the heliostat positions in each sub-mirror field is determined.

[0012] Furthermore, after step S8, it further includes performing an intersection operation on the positions of the molten salt pipelines and the conventional island between each sub-mirror field and the layout diagram of the multi-tower heliostat positions in step S8, and removing the relevant heliostat positions.

[0013] Furthermore, in the intersection operation of step S7, the position of the heat absorption tower in the single mirror field generated in step S6 is located in each sub-mirror field with edge lines in step S5.

[0014] To achieve the above object, the present invention provides a layout system for a multi-tower and single-machine concentrating solar power field, including a mirror field design module, a mirror field calculation module, and a mirror field output module. The mirror field design module: determines the overall shape of the multi-tower mirror field and the shape of the sub-mirror fields; the mirror field calculation module: uses SAM software to generate a single mirror field layout, performs an intersection operation on the shape of the sub-mirror fields and the single mirror field layout, and determines the layout diagram of the heliostat positions in each sub-mirror field; the mirror field output module: splices the layout diagrams of the heliostat positions in each sub-mirror field and outputs the layout diagram of the multi-tower heliostat positions.

[0015] The beneficial effects of the technical solution provided by the present invention: The present invention creatively proposes a layout method and system for a multi-tower and multi-mirror field. Under the same conditions and with equal mirror field areas, a higher mirror field efficiency is achieved, and the layout of the multi-tower mirror field is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flowchart of a layout method for a multi-tower and single-machine concentrating solar power field provided by the present invention.

[0017] Figure 2 A schematic diagram of the overall shape of the multi-tower mirror field.

[0018] Figure 3Schematic diagram of the straight-line connection of the sub-mirror field intersection points.

[0019] Figure 4 Schematic diagram of the outer edge of the multi-tower mirror field.

[0020] Figure 5 Schematic diagram of the edge line of the sub-mirror field Figure 1 。

[0021] Figure 6 Schematic diagram of the edge line of the sub-mirror field Figure 2 。

[0022] Figure 7 Schematic diagram of the multi-tower mirror field with the edge line of the sub-mirror field.

[0023] Figure 8 Schematic diagram of the single-mirror field layout generated using SAM software.

[0024] Figure 9 Schematic diagram of the intersection operation between the sub-mirror field with the edge line and the single-mirror field Figure 1 。

[0025] Figure 10 Schematic diagram of the intersection operation between the sub-mirror field with the edge line and the single-mirror field Figure 2 。

[0026] Figure 11 Heliostat point layout of the sub-mirror field Figure 1 。

[0027] Figure 12 Heliostat point layout of the sub-mirror field Figure 2 。

[0028] Figure 13 Heliostat point layout diagram of the multi-tower heliostat field.

[0029] Figure 14 Flowchart of the layout method of a solar thermal power generation multi-tower one-machine concentrating field (including molten salt pipelines and conventional island) provided by the present invention.

[0030] Figure 15 Heliostat and molten salt pipeline point layout of the sub-mirror field Figure 1 。

[0031] Figure 16 Heliostat and molten salt pipeline point layout of the sub-mirror field Figure 2 。

[0032] Figure 17 Heliostat and molten salt pipeline point layout diagram of the multi-tower heliostat field.

[0033] Figure 18 Layout system diagram of a solar thermal power generation multi-tower one-machine concentrating field provided by the present invention. Specific implementation mode

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, terms such as "first" and "second" are only used for differential description and cannot be understood as indicating or implying relative importance.

[0036] First, some terms involved in the embodiments of the present application will be described to facilitate the understanding of those skilled in the art.

[0037] Heliostat: It is an optical device that reflects sunlight to a fixed direction by tracking the movement of the sun and is widely used in the fields of solar thermal power generation and astronomical observation.

[0038] Mirror field: It is the core device in a solar thermal power generation system composed of multiple heliostats arranged in a specific array. Its function is to efficiently reflect and focus the scattered sunlight onto the absorber tower or the target area by tracking the movement of the sun in coordination, so as to realize the centralized utilization of solar energy.

[0039] Absorber tower: It is the core device of a solar thermal power generation system. Its function is to receive the solar beam reflected by the heliostat, convert the light energy into heat energy and store it, and then drive the steam turbine to generate electricity.

[0040] SAM software: That is, the mirror field design software. It is a software developed by the National Renewable Energy Laboratory (NREL) of the United States and plays an important role in mirror field design and the planning and evaluation of the entire solar thermal power generation system.

[0041] The technical solutions of the present application will be introduced in detail below by describing several exemplary embodiments in combination with the accompanying drawings, and at the same time, the technical effects produced by the technical solutions of the present application will be described. It should be noted that the following embodiments can be referred to, learned from, and combined with each other. For the same terms, similar features, and similar implementation steps in different embodiments, they will not be described repeatedly. Embodiment 1

[0042] Taking the 7-tower and 7-mirror field as an example, as Figure 1 shown, the present invention provides a layout method for a concentrating solar power multi-tower and single-machine concentrating field, and the layout method includes.

[0043] S1. Determine the overall shape of the multi-tower mirror field.

[0044] Before determining the overall shape of the multi-tower mirror field, it is necessary to confirm the geographical location, solar radiation data, climate conditions, height of the heat absorption tower, collector and heliostat of the mirror field location. The specific parameters are as follows.

[0045] Geographical location: longitude, latitude, altitude of the mirror field location, area of the entire mirror field and topography.

[0046] Solar radiation data: direct radiation intensity (DNI), diffuse radiation intensity and seasonal and daily variation laws of solar radiation.

[0047] Climate conditions: ambient temperature, wind speed and direction, atmospheric transparency and precipitation and dust conditions.

[0048] Height of the heat absorption tower: The height of the tower will affect the reflection angle of the heliostat and the heat collection effect. A higher tower can make the heliostat reflect light at a better angle within a larger range, but at the same time it will increase the construction cost and construction difficulty.

[0049] Collector: heat absorption efficiency, heat loss rate, working temperature range.

[0050] Heliostat: reflectivity, tracking accuracy, performance of the drive system.

[0051] After confirming all the above parameters, carry out the overall shape design of the multi-tower mirror field, generate multiple intersecting sub-mirror fields, make the best use of the mirror field area and avoid waste of land area.

[0052] As Figure 2 shown, the sub-mirror fields are all circular, draw 7 sub-mirror fields corresponding to 7 towers, and the adjacent sub-mirror fields intersect with each other to generate seven intersecting circles.

[0053] Here, the specific shape of the sub-mirror field is not specifically limited, and it can be circular, square or other shapes.

[0054] The shapes of the sub-mirror fields can be the same or different, and the specific shape of each sub-mirror field is not specifically limited here.

[0055] S2. Determine the intersection points of each sub-mirror field and connect each intersection point with a straight line.

[0056] As Figure 3As shown, the sub-mirror fields are all circular. Draw 7 sub-mirror fields corresponding to 7 towers. The adjacent sub-mirror fields intersect with each other. Determine the intersection points of each sub-mirror field and connect these intersection points with straight lines.

[0057] S3. Merge each sub-mirror field, remove the connecting lines of the intersection points, and determine the outer edge of the multi-tower mirror field.

[0058] As Figure 4 shown, the sub-mirror fields are all circular. Draw 7 sub-mirror fields corresponding to 7 towers. The adjacent sub-mirror fields intersect with each other. Remove the connecting lines between the intersection points, merge each sub-mirror field, and determine the outer edge of the multi-tower mirror field.

[0059] S4. Determine the edge lines of each sub-mirror field.

[0060] As Figure 5 、 Figure 6 shown, after determining the outer edge of the multi-tower mirror field in S3, connect the intersection points of the sub-mirror fields with straight lines, thereby determining the edge lines of each sub-mirror field.

[0061] S5. Piece together each sub-mirror field with the edge lines to determine the multi-tower mirror field.

[0062] As Figure 7 shown, piece together the sub-mirror fields with the confirmed edge lines in S4, thereby determining the final multi-tower mirror field.

[0063] S6. Use the SAM software to generate a single-mirror field layout.

[0064] Using the geographical location of the mirror field, solar radiation data, climate conditions, height of the solar tower, collectors and heliostats, the above parameters are the same as those in S1, generate a single-mirror field layout diagram corresponding to a single tower, as Figure 8 shown.

[0065] S7. Perform an intersection operation on each sub-mirror field with the edge lines in S5 and the single-mirror field generated in S6 to determine the layout diagram of the heliostat positions in each sub-mirror field.

[0066] As Figure 9 、 Figure 10 shown, based on the control principles of maximum efficiency control, maximum energy within a given time period, maximum cost performance, and weighted average of the above three methods, perform an intersection operation on each sub-mirror field with the edge lines in S5 and the single-mirror field generated in S6, thereby determining the layout diagram of the heliostat positions in each sub-mirror field.

[0067] Finally, determine the layout diagram of the heliostat positions in each sub-mirror field as Figure 11 、 Figure 12 shown.

[0068] The above 4 methods are selected according to the specific situation on site, and no specific restrictions are made here.

[0069] The above four specific control principles will be specifically explained in Embodiment 2.

[0070] The position of the heat absorption tower in the single mirror field generated in S6 is located in each sub-mirror field with an edge line in S5, that is, the position of the heat absorption tower in the layout of the single mirror field generated in S6 should be located in each sub-mirror field with an edge line in S5.

[0071] S8. Combine the heliostat point position layout diagrams of each sub-mirror field in S7 into a multi-tower heliostat point position layout diagram.

[0072] As Figure 13 shown, redraw the single mirror field layout diagram determined in S7 on the same drawing to obtain a multi-tower heliostat point position layout diagram, and complete the layout design of the entire mirror field.

[0073] During the above entire layout process, precise coordinates are carried. The edges of the multi-tower total mirror field, the edges of the sub-mirror fields, and individual heliostats all have precise coordinates. The use of coordinates here is not specifically restricted. Embodiment 2

[0074] In S7, perform an intersection operation on each sub-mirror field with an edge line in S5 and the single mirror field generated in S6 to determine the heliostat point position layout diagram of each sub-mirror field.

[0075] The basis for the intersection operation is the control principles of the highest average efficiency control, the highest energy within a given time period, the highest cost performance, and the weighted average method of the above three methods. Perform an intersection operation on each sub-mirror field with an edge line in S5 and the single mirror field generated in S6 to determine the heliostat point position layout diagram of each sub-mirror field. The following elaborates on the above four theoretical algorithms in detail.

[0076] The shape of the sub-mirror field layout is sharp. The overall heliostat set in the single mirror field layout generated using the SAM software is total. Select a part of the heliostats from the overall heliostat set total to form a new set called select.

[0077] These selected heliostats (select) are obtained by performing an "AND" operation on total and the mirror field layout shape sharp. That is to say, only the heliostats that meet both total and the mirror field layout shape sharp will be selected into select.

[0078] Finally, search in the large set total according to the mirror field layout shape sharp to find the most suitable heliostat positions. There are the following control equations for determining the most suitable heliostat positions.

[0079] Highest average efficiency control: In the selected heliostat set select, determine the one with the highest average efficiency select.e, that is, take the maximum value in select.e (max(select.e)). The heliostat set with the highest average efficiency is the optimal solution.

[0080] Highest energy within a given time period: If specific time time and DNI (Direct Normal Irradiance) information are given, then for each heliostat in the select set, calculate the product of its average efficiency (select.e) and DNI during this time period (dniselect.e@time), and then take the maximum value of this product (max(dniselect.e@time)). The corresponding heliostat set is the optimal solution that obtains the highest energy within the given time period.

[0081] Highest cost performance: When the number of heliostats num is given, if the number of heliostats (select.n) in the elect set exceeds num, then continuously remove the heliostat with the lowest efficiency (min(select.e)) from the select set until the remaining number of heliostats meets the requirement of num. Then take the maximum value (Max) in the remaining heliostat set. The heliostat corresponding to the maximum value in this remaining set is the optimal solution with the highest cost performance when the quantity meets the requirement.

[0082] Weighted average of the above three methods: If you don't want to simply determine the optimal solution according to only one of the above three methods, but consider these three methods comprehensively, assign certain weights to them respectively, and then calculate through the weighted average method to finally obtain a comprehensive optimal solution. Embodiment 3

[0083] As Figure 14 shown, after S8, it further includes performing an intersection operation on the molten salt pipeline between each sub - mirror field and the position of the conventional island with the multi - tower heliostat point layout diagram in S8 to remove relevant heliostat points.

[0084] The conventional island consists of a steam turbine generator set, a steam - water circulation system, and auxiliary equipment. By setting the height and length of the road required for the molten salt pipeline between the sub - mirror fields and the coordinates of the conventional island, and then performing an intersection operation with the multi - tower heliostat point layout diagram confirmed in S8 to remove the heliostat points in the road, finally obtain the entire complete multi - tower mirror field layout diagram, as Figures 15 - 17 shown. Embodiment 4

[0085] The present invention provides a layout system for a multi-tower one-machine solar thermal power generation concentrating field, including a mirror field design module, a mirror field calculation module, and a mirror field output module. The mirror field design module: determines the overall shape of the multi-tower mirror field and the shape of the sub-mirror fields; The mirror field calculation module: uses SAM software to generate a single mirror field layout, and performs an intersection operation between the shape of the sub-mirror field and the single mirror field layout to determine the layout diagram of the heliostat positions of each sub-mirror field; The mirror field output module: combines the layout diagrams of the heliostat positions of each sub-mirror field and outputs the layout diagram of the heliostat positions of the multi-tower.

[0086] As Figure 18 shown, parameters such as geographical location, solar radiation data, climate conditions, height of the absorber tower, collector, and heliostat are input into the mirror field design module, and the mirror field design module outputs the overall shape of the multi-tower mirror field and the shape of the sub-mirror fields; The mirror field calculation module generates a single mirror field layout through SAM software, and performs an intersection operation between the shape of the sub-mirror field output by the mirror field design module and the single mirror field layout; The mirror field output module combines the layout diagrams of the heliostat positions of each sub-mirror field according to the calculation results of the mirror field calculation module and outputs the layout diagram of the heliostat positions of the multi-tower.

[0087] Finally, it should be noted that: the above-mentioned embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A layout method for a solar thermal power generation multi-tower one-machine concentrating field, characterized in that The layout method includes: S1. Determine the overall shape of the multi-tower mirror field; S2. Determine the intersection points of each sub-mirror field and connect the intersection points linearly; S3. Merge each sub-mirror field, remove the connecting lines of the intersection points, and determine the outer edge of the multi-tower mirror field; S4. Determine the edge lines of each sub-mirror field; S5. Assemble each sub-mirror field with edge lines to determine the multi-tower mirror field; S6. Use SAM software to generate the layout of a single mirror field; S7. Perform an intersection operation on each sub-mirror field with edge lines in S5 and the single mirror field generated in S6 to determine the layout diagram of the heliostat positions in each sub-mirror field; S8. Assemble the layout diagrams of the heliostat positions in each sub-mirror field in S7 into a layout diagram of the heliostat positions in a multi-tower.

2. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1, wherein, In S1, determine the overall shape of the multi-tower mirror field according to geographical location, solar radiation data, climate conditions, the height of the heat absorption tower, the size of the collector, and the parameters of the heliostat.

3. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1, characterized in that, Each of the sub-mirror fields is a circular mirror field.

4. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1 or 3, characterized in that In S7, obtain the highest average efficiency of the mirror field through the intersection operation, so as to determine the layout diagram of the heliostat positions in each sub-mirror field.

5. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1 or 3, characterized in that, In S7, obtain the highest energy within a given time period of the mirror field through the intersection operation, so as to determine the layout diagram of the heliostat positions in each sub-mirror field.

6. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1 or 3, characterized in that In S7, obtain the highest cost performance of the mirror field through the intersection operation, so as to determine the layout diagram of the heliostat positions in each sub-mirror field.

7. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1 or 3, characterized in that In S7, perform a weighted average on the highest average efficiency of the mirror field, the highest energy within a given time period of the mirror field, and the highest cost performance of the mirror field, and determine the layout diagram of the heliostat positions in each sub-mirror field through the intersection operation.

8. The layout method of the concentrating solar power multi-tower one-machine concentrating solar field according to claim 1 or 3, characterized in that After S8, it further includes performing an intersection operation on the positions of the molten salt pipelines and the conventional island between each sub-mirror field and the layout diagram of the heliostat positions in the multi-tower in S8, and removing the relevant heliostat positions.

9. The layout method of the solar thermal power generation multi-tower one-machine concentrating field according to claim 1 or 3, characterized in that, In the intersection operation of S7, the position of the heat absorption tower in the single mirror field generated in S6 is located in each sub-mirror field with edge lines in S5.

10. A layout system for a solar thermal power generation multi-tower one-machine concentrating field, characterized in that, It includes a mirror field design module, a mirror field calculation module, and a mirror field output module. Mirror field design module: Determine the overall shape of the multi-tower mirror field and the shape of the sub-mirror field; Mirror field calculation module: Use SAM software to generate the layout of a single mirror field, perform an intersection operation on the shape of the sub-mirror field and the layout of the single mirror field, and determine the layout diagram of the heliostat positions in each sub-mirror field; Mirror field output module: Assemble the layout diagrams of the heliostat positions in each sub-mirror field and output the layout diagram of the heliostat positions in a multi-tower.

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