A method for analyzing cumulative insolation during the year at a specific point reflecting the shading effect of solar radiation shielding

Abstract

A method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield according to one aspect of the present invention may comprise: (a) a step of modeling a building to be analyzed; (b) a step of modeling a shield adjacent to the modeled building to be analyzed; (c) a step of setting the location of a photovoltaic power generation system installed on the building to be analyzed; (d) a step of analyzing the solar radiation of the building to be analyzed and analyzing and storing the positional relationship between the building to be analyzed and the shield; (e) a step of checking whether the solar radiation is accumulated based on the presence or absence of the shield using an annual solar trajectory; and (f) a step of calculating and summing the annual power generation amount.

Description

Technology Field

[0001] The present invention relates to a method for analyzing the cumulative solar radiation over a yearly period at a specific point, reflecting the shading effect of a solar radiation shield. More specifically, it relates to a method for analyzing the cumulative solar radiation over a yearly period at a specific point, reflecting the shading effect of a solar radiation shield, capable of calculating the cumulative solar radiation for all periods of the year for which results are required. Background Technology

[0003] Building-integrated photovoltaic (BIPV) systems are installed on specific walls of buildings due to their characteristics, and there is a possibility that they may be affected by sunlight shading from adjacent shading objects (the building itself, adjacent buildings, and geographical features). In particular, when installed in urban areas, the degree of sunlight shading (the timing and duration of shading) becomes an important factor affecting the amount of power generated by the BIPV system.

[0004] In other words, the most important factor determining the power generation of a building-integrated photovoltaic (BIPV) system is the amount of solar radiation incident on the installation surface of the photovoltaic system. Since the amount of solar radiation varies by time (day, hour, minute) depending on the installation location, installation direction, and installation inclination, if the amount of solar radiation is not predicted by reflecting the exact time when sun occlusion occurs based on the positional relationship between the surface where the BIPV system is installed and the sun occlusion material, it is not possible to quantitatively predict the actual amount of power generation that varies depending on the installation location.

[0005] However, the assessment of the annual sunlight occlusion impact is generally performed using simulation programs that require separate modeling. In particular, to assess the annual sunlight environment, the year must be evaluated by time unit (e.g., if evaluated in 1-minute units, 525,600 iterations are required for the annual evaluation). Since the assessment is very time-consuming and cumbersome, there are limitations in immediately reflecting the results during design. Prior art literature

[0007] Korean Patent Publication No. 10-2462909 (2022.11.04) The problem to be solved

[0008] The present invention has been devised to solve the aforementioned problems, and the objective of the present invention is to provide a method for analyzing the cumulative solar radiation over a yearly period at a specific point by reflecting the shading effect of a solar shield, which can quickly determine whether solar radiation is shielded for the entire year. means of solving the problem

[0010] A method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield according to one embodiment of the present invention for achieving the above-mentioned purpose may comprise: (a) a step of modeling a building to be analyzed; (b) a step of modeling a shield adjacent to the modeled building to be analyzed; (c) a step of setting the location of a photovoltaic power generation system installed on the building to be analyzed; (d) a step of analyzing the solar radiation of the building to be analyzed and analyzing and storing the positional relationship between the building to be analyzed and the shield; (e) a step of checking whether the solar radiation is accumulated based on the presence or absence of the shield using an annual solar trajectory; and (f) a step of calculating and summing the annual power generation amount.

[0011] The above step (d) may include a preliminary analysis step 1 that analyzes the annual minute-by-minute horizontal solar radiation of the building to be analyzed, and a preliminary analysis step 2 that analyzes the positional relationship between the building to be analyzed and the shielding object in terms of phase angles and stores it in a specialized grid.

[0012] In the second step of the above preliminary analysis, the phase angle for analyzing the positional relationship of the shield can be divided into a horizontal angle and a vertical angle.

[0013] The above step (e) may comprise a solar radiation analysis step 1 that calculates the solar altitude and azimuth angle at the required time point in the building to be analyzed, a solar radiation analysis step 2 that determines the presence or absence of the shield by querying the solar altitude and azimuth angle at the required time point in the building to be analyzed and the angle corresponding to the shield on the grid, a solar radiation analysis step 3 that determines whether the solar radiation at the corresponding time point is accumulated based on the presence or absence of the shield at the corresponding time point, and a solar radiation analysis step 4 that repeats the solar radiation analysis steps 1 through 3 during the analysis period.

[0014] In the second step of the above solar radiation analysis, the vertical angle of the phase angle for analyzing the positional relationship between the solar altitude at the required time point and the shielding object at the building to be analyzed is compared, and the horizontal angle of the phase angle for analyzing the positional relationship between the azimuth angle at the required time point and the shielding object at the building to be analyzed is compared to determine the presence or absence of the shielding object.

[0015] In step (e) above, the annual solar trajectories for summer and winter can be applied to the grid on which the shielding is displayed, respectively.

[0016] The above-mentioned solar power generation system can be formed by linking with a BIM file extracted from a BIM modeling program capable of performing 3D modeling of the building to be analyzed.

[0017] The above-described photovoltaic power generation system can calculate at least one of the annual sunlight hours, solar radiation, and power generation by summing the sunlight hours, solar radiation, and power generation calculated in minutes.

[0018] The above solar power generation system can apply the weather conditions of the corresponding region of the building under analysis. Effects of the invention

[0020] According to the method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield according to the present invention, it is possible to quickly determine whether solar radiation is shielded for all periods of the year. Brief explanation of the drawing

[0022] FIGS. 1 and 2 are flowcharts illustrating a method for analyzing the cumulative solar radiation over an annual period at a specific point reflecting the shading effect of a solar radiation shield according to an embodiment of the present invention. FIGS. 3 and 4 are perspective views showing a building to be analyzed on a shielding map according to an embodiment of the present invention. FIG. 5 is an exemplary diagram showing a grid of a solar radiation shield map according to one embodiment of the present invention. FIGS. 6 to 8 are exemplary diagrams showing a building to be analyzed on a grid according to an embodiment of the present invention. FIG. 9 is an exemplary diagram showing the annual solar trajectory on a solar ray shield map according to one embodiment of the present invention. Specific details for implementing the invention

[0023] Hereinafter, a method for analyzing the cumulative solar radiation over an annual period at a specific point reflecting the shading effect of a solar radiation shield according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0025] FIGS. 1 and 2 are flowcharts illustrating a method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield according to an embodiment of the present invention; FIGS. 3 and 4 are perspective views showing a building to be analyzed on a shield map according to an embodiment of the present invention; FIG. 5 is an exemplary diagram showing a grid of a solar radiation shield map according to an embodiment of the present invention; FIGS. 6 to 8 are exemplary diagrams showing a building to be analyzed on a grid according to an embodiment of the present invention; and FIG. 9 is an exemplary diagram showing an annual solar trajectory on a solar radiation shield map according to an embodiment of the present invention.

[0026] Referring to FIGS. 1 to 9, a method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield according to one embodiment of the present invention analyzes the annual solar radiation shielding effect, incoming solar radiation, and power generation amount every minute, and in particular, can quickly determine the annual solar radiation analysis of a specific point receiving solar radiation and the annual solar radiation analysis reflecting the effect of the shield (200).

[0027] In step S1100, modeling of the building (100) to be analyzed can be performed. At this time, the building (100) to be analyzed can have a building-integrated photovoltaic power generation system (300) (BIPV system) installed in a general 3D program such as design CAD, and a model of the shape and location (building outline and highest point height) of the building (100) to be analyzed can be created.

[0028] And it can be formed by linking with a BIM file extracted from a BIM modeling program that can perform 3D modeling of the building (100) to be analyzed.

[0029] In step S1200, modeling of a shield (200) adjacent to the modeling of the building (100) to be analyzed can be performed. The shield (200) can be formed in various ways, such as a building or a topographical feature, and may be a sunlight shield (200) adjacent to the building where the solar power generation system (300) is installed.

[0030] In step S1300, the installation point of the photovoltaic power generation system (300) (BIPV system) is marked at a specific exterior wall location of the building (100) to be analyzed (a straight line connecting the left and right endpoints of the installation location).

[0031] The location where the solar power generation system (300) is installed can be formed in various ways, such as the height and width of the building (100) to be analyzed, and the adjacent shielding material (200) can be determined accordingly.

[0032] Then, to measure the solar power generation system (300), the installation area (latitude, longitude) is entered, and after selecting the installation location indicator line, the power generation characteristics of the expected building-integrated photovoltaic system (BIPV system) can be entered.

[0033] In addition, the solar power generation system (300) can apply the weather conditions of the area of ​​the building (100) to be analyzed.

[0034] In step S1400, the amount of solar radiation of the building to be analyzed (100) can be analyzed, and the positional relationship between the building to be analyzed (100) and the solar radiation shield (200) can be analyzed and stored.

[0035] To this end, step S1400 may include a preliminary analysis step 1 (S1410) that analyzes the annual minute-by-minute horizontal solar radiation of the building (100) to be analyzed, and a preliminary analysis step 2 (S1420) that analyzes the positional relationship between the building (100) to be analyzed and the shield (200) in terms of phase angles and stores it in a specialized grid (500).

[0036] In the first stage of preliminary analysis (S1410), the horizontal solar radiation of the building (100) to be analyzed is analyzed in annual minutes of months, days, hours, and minutes, and in the second stage of preliminary analysis (S1420), the phase angle for analyzing the positional relationship with respect to the shield (200) is divided into horizontal angle and vertical angle and can be stored in the grid (500).

[0037] Then, in order to display adjacent shielding (200) on the grid (500), an altitude and azimuth angle of the same angle are formed on the grid (500) based on the center point of the installation surface of the photovoltaic power generation system (300), and a spatial shielding map is formed on the grid (500) that reflects the positional relationship of adjacent shielding (200) (installation building itself, adjacent building, topographical features).

[0038] Since the location of adjacent shielding (200) according to each analysis point remains unchanged annually except when the building or topographic feature is newly constructed or demolished, it can be completed with one creation per analysis point.

[0039] The annual solar trajectory (600) can be applied to the shielding map formed on the grid (500) on which such shielding (200) is displayed, and the summer and winter seasons can be applied respectively.

[0040] Step S1500 may include a solar radiation analysis step 1 (S1510) that calculates the solar altitude and azimuth angle at a required time point in the building (100) to be analyzed in order to determine whether solar radiation is accumulated based on the presence or absence of a shield (200) by utilizing the annual solar trajectory (600); a solar radiation analysis step 2 (S1520) that determines whether the shield (200) is present by looking up the solar altitude and azimuth angle at a required time point in the building (100) to be analyzed and the angle corresponding to the shield (200) on the grid (500); a solar radiation analysis step 3 (S1530) that determines whether solar radiation is accumulated based on the presence or absence of a shield (200) at a given time point; and a solar radiation analysis step 4 (S1540) that repeats the solar radiation analysis step 1 (S1510) to solar radiation analysis step 3 (S1530) during the analysis period.

[0041] Here, the first step of solar radiation analysis (S1510) starts the evaluation from 0:00 on January 1st to measure the annual solar power generation system (300), and in the second step of solar radiation analysis (S1520), the vertical angle of the phase angle is compared to analyze the positional relationship between the solar altitude at the required time point and the shield (200) at the building (100) to be analyzed, and the horizontal angle of the phase angle is compared to analyze the positional relationship between the azimuth angle at the required time point and the shield (200) at the building (100) to determine the presence or absence of the shield (200).

[0042] Since the position of the sun is constant, solar radiation information for all times of the year of the building (100) to be analyzed can be stored and extracted with one analysis per installation location of the solar power generation system (300).

[0043] And by storing the positional relationship between the location of the building (100) to be analyzed and the shielding (200) that affects solar radiation shielding, i.e., the horizontal angle and vertical angle where the shielding (200) is located relative to the building (100) to be analyzed, in the grid (500), the solar radiation shielding status on a specific day and at a specific time can be quickly determined based on the solar altitude and azimuth angle of that time, and the solar radiation shielding status can be quickly determined for all periods of the year.

[0044] Meanwhile, in the 4th step of solar radiation analysis (S1540), the steps from the 1st step of solar radiation analysis (S1510) to the 3rd step of solar radiation analysis (S1530) can be repeated 525,600 times at 1-minute intervals until 23:59 on December 31.

[0045] In step S1600, when the iterative calculation is completed as 23:59 on December 31st is reached in step 4 of the solar radiation analysis (S1540), the calculated minute-by-minute sunshine hours, solar radiation, and power generation amount can be summed to derive the result.

[0046] Using the results calculated in this way, the cumulative solar radiation for all periods of the year for which results are required to be extracted, from a specific day or specific time to a specific period, can be calculated, and the rapid solar shading status can be determined.

[0048] Although a method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield according to one embodiment of the present invention has been described above, the concept of the present invention is not limited to the embodiments presented in this specification. Furthermore, a person skilled in the art who understands the concept of the present invention may easily propose other embodiments within the scope of the same concept by adding, changing, deleting, or adding components, and such are also to be considered to fall within the scope of the concept of the present invention. Explanation of the symbols

[0050] 100: Building under analysis 200: Shielding 300: Solar power generation system 500: Grid 600: Solar Trajectory

Claims

Claim 1 (a) a step of modeling the building to be analyzed; (b) a step of modeling a shielding object adjacent to the modeled building to be analyzed; (c) a step of setting the location of a photovoltaic power generation system installed on the building to be analyzed; (d) a step of analyzing the solar radiation of the building to be analyzed and analyzing and storing the positional relationship between the building to be analyzed and the shielding object; (e) a step of checking whether the solar radiation accumulates based on the presence or absence of the shielding object using the annual solar trajectory; and (f) a step of calculating and summing the annual power generation amount; The above step (d) comprises a preliminary analysis step 1 that analyzes the annual minute-by-minute horizontal solar radiation of the building to be analyzed, and a preliminary analysis step 2 that analyzes the positional relationship between the building to be analyzed and the shielding object in terms of phase angles and stores it in a specialized grid; the above step (e) comprises a solar radiation analysis step 1 that calculates the solar altitude and azimuth angle at a required time point in the building to be analyzed, a solar radiation analysis step 2 that determines the presence or absence of the shielding object by querying the angle corresponding to the solar altitude and azimuth angle at a required time point in the building to be analyzed and the shielding object on the grid, a solar radiation analysis step 3 that determines whether the solar radiation at a given time point is accumulated based on the presence or absence of the shielding object at that time point, and a solar radiation analysis step 4 that repeatedly performs solar radiation analysis steps 1 through 3 during the analysis period; and in the solar radiation analysis step 2, the vertical angle of the phase angle is compared to analyze the positional relationship between the solar altitude at a required time point in the building to be analyzed and the shielding object, and the analysis target A method for analyzing the cumulative solar radiation over a yearly period at a specific point reflecting the shading effect of a solar radiation shield, characterized by determining the presence or absence of a shield by comparing the horizontal angle of the phase angle for analyzing the positional relationship between the azimuth angle at the required time point in the building and the shield. Claim 2 delete Claim 3 A method for analyzing the cumulative solar radiation over an annual period at a specific point reflecting the shading effect of a solar radiation shield, characterized in that, in the second step of the preliminary analysis, the phase angle for analyzing the positional relationship of the shield is divided into a horizontal angle and a vertical angle. Claim 4 delete Claim 5 delete Claim 6 A method for analyzing the cumulative annual solar radiation at a specific point reflecting the shading effect of a solar radiation shield, characterized in that, in step (e), the annual solar trajectories of the summer and winter seasons are respectively applied to the grid on which the shield is displayed. Claim 7 A method for analyzing the cumulative annual solar radiation at a specific point reflecting the shading effect of a solar shading object, characterized in that, in claim 6, the solar power generation system is formed in conjunction with a BIM file extracted from a BIM modeling program capable of performing 3D modeling of the building to be analyzed. Claim 8 A method for analyzing the cumulative annual solar radiation at a specific point reflecting the shading effect of a solar radiation shield, characterized in that, in claim 7, the solar power generation system calculates at least one of the annual solar radiation, solar radiation, and power generation by summing the solar radiation, solar radiation, and power generation calculated in minutes. Claim 9 In claim 8, the method for analyzing the cumulative annual solar radiation at a specific point reflecting the shading effect of a solar shading object is characterized by applying the weather conditions of the corresponding region of the building to be analyzed to the solar power generation system.

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