Method and device for determining optimal overhanging length of building overhanging sunshade element

Abstract

The present invention belongs to the field of building energy conservation and carbon reduction design, and provides a method and device for determining the optimal overhanging length of a building overhanging sunshade. The method includes obtaining the target distance from the overhanging sunshade to the window to be shaded and the target height of the window to be shaded; the target distance is the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded; obtaining an optimal overhanging length determination model; processing the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade. The method for determining the optimal overhanging length provided by the present invention is not affected by building shapes, plane layouts, window-wall ratios, the thermal performance of exterior walls and windows, and window widths, etc., and can quickly determine the optimal overhanging length of the overhanging sunshade, that is, it can ensure that the overhanging sunshade takes into account the annual comprehensive benefits of reducing the heating load by obtaining solar heat in winter and reducing the air-conditioning load by blocking solar heat in summer.

Description

Technical Field

[0001] The present invention relates to the field of building energy conservation and carbon reduction design, and particularly to a method and device for determining the optimal overhanging length of a building overhanging sunshade member. Background Art

[0002] The application of overhanging sunshades in buildings has a long history. It is widely popular because it can effectively block the solar radiation heat gain of exterior windows. Architects usually combine it with the shaping of building space form and the design of facade modeling. Common implementation forms include balconies, cantilever slabs, etc. For the energy-saving renovation of old buildings, installing fixed overhanging sunshades is more cost-effective than installing movable external sunshades.

[0003] It should be noted that during engineering design, while using fixed external sunshades to reduce solar radiation heat gain and reduce summer cooling load, it will also be disadvantageous for buildings with heating requirements in winter due to the reduction of solar heat gain. Currently, the size of the overhanging member that affects the sunshade effect is often designed by architects according to the modeling requirements of the building itself, rather than determined based on its annual comprehensive sunshade effect. The main reasons are as follows. First, the calculation method of the sunshade effect of the overhanging sunshade member given in the existing building thermal engineering or energy-saving related standards can obtain a SHGC value (i.e., the solar heat gain coefficient), but only the positive sunshade benefits in summer are usually considered during the calculation, and the negative sunshade benefits in winter are not considered. In fact, the sunshade effect of the sunshade member is closely related to the location, the size of the sunshade member itself, and the relative position between the sunshade member and the shaded exterior window. Moreover, due to different regions, seasons, and times, the solar altitude angle is different, and the sunshade benefits are different every moment. It is obviously not accurate enough to measure the sunshade benefits with only one SHGC value. Second, it is extremely difficult to obtain the hourly SHGC value of the overhanging sunshade member and calculate the comprehensive benefits in winter and summer based on this. According to the current technological development level, if you want to find the size of the sunshade component that comprehensively considers the best hourly sunshade benefits throughout the year, you can only accurately model according to the detailed building design drawings through a functional energy consumption calculation software, input detailed setting parameters, and then conduct individual case calculations for different sunshade product sizes, calculate the comprehensive benefits of sunshading throughout the year for several cases, and finally compare them to determine the optimal design size. And this process cannot be completed during the initial building scheme design process. During the initial stage of the building scheme, designers can only pre-design a size according to the modeling requirements first. It is not until the building scheme's plan, elevation, and section drawings and details are completed, and even until the extended preliminary or construction drawing stage, that it is possible to conduct energy consumption simulation calculations through modeling. By repeatedly simulating and calculating to evaluate the sunshade benefits under different sunshade member sizes, the optimal size can be obtained, and then the building scheme can be adjusted. This process is time-consuming and laborious, and designers can only try several possible schemes and cannot manually traverse hundreds or thousands of possibilities. Therefore, the determined overhanging sunshade size cannot ensure the achievement of the optimal purpose of the comprehensive benefits of positive and negative sunshading throughout the year. Summary of the Invention

[0004] The present invention provides a method and device for determining the optimal overhanging length of a building overhanging sunshade member, so as to solve the defects in the prior art that the process of determining the overhanging sunshade size is time-consuming and laborious, and the optimal sunshade benefit cannot be guaranteed.

[0005] The present invention provides a method for determining the optimal overhanging length of a building overhanging sunshade member, including:

[0006] Obtain the target distance from the overhanging sunshade member to the window to be shaded, and the target height of the window to be shaded; wherein, the target distance is the distance from the fixed position of the overhanging sunshade member to the upper end of the window to be shaded;

[0007] Obtain an optimal overhanging length determination model;

[0008] Process the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade member.

[0009] According to a method for determining the optimal overhanging length of a building overhanging sunshade member provided by an embodiment of the present invention, the optimal overhanging length determination model is pre-obtained through the following steps:

[0010] Obtain preset determination models corresponding to multiple sunshade windows with different heights;

[0011] Perform fitting processing on all the preset determination models to obtain the optimal overhanging length determination model.

[0012] According to a method for determining the optimal overhanging length of a building overhanging sunshade member provided by an embodiment of the present invention, the multiple heights include a first height;

[0013] The obtaining of the preset determination models corresponding to multiple sunshade windows with different heights includes:

[0014] Based on a first preset step length, determine multiple reference overhanging lengths within a first preset range corresponding to the overhanging length of the overhanging sunshade member;

[0015] Based on a second preset step length, determine multiple reference distances within a second preset range corresponding to the distance from the fixed position of the overhanging sunshade member to the upper end of the sunshade window;

[0016] Process the multiple reference overhanging lengths and the multiple reference distances through a benefit model to obtain a two-dimensional relationship curve between the multiple reference overhanging lengths and the multiple reference distances;

[0017] Based on the first height, convert the two-dimensional relationship curve into a three-dimensional relationship curve;

[0018] Determine the model corresponding to the peak curve of the three-dimensional relationship curve as the preset determination model corresponding to the first height.

[0019] According to a method for determining the optimal overhanging length of a building overhanging sunshade provided by an embodiment of the present invention, the converting the two-dimensional relationship curve into a three-dimensional relationship curve based on the first height includes:

[0020] Perform interpolation processing on the two-dimensional relationship curve to obtain a target relationship curve;

[0021] Based on the first height, convert the target relationship curve into a three-dimensional relationship curve.

[0022] According to a method for determining the optimal overhanging length of a building overhanging sunshade provided by an embodiment of the present invention, the obtaining the optimal overhanging length determination model includes:

[0023] Determine the optimal overhanging length determination model as:

[0024]

[0025] Where D represents the overhanging length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade to the upper end of the sunshade window.

[0026] According to a method for determining the optimal overhanging length of a building overhanging sunshade provided by an embodiment of the present invention, the obtaining the preset determination models corresponding to sunshade windows with different heights includes:

[0027] When the height of the sunshade window is the first preset height, determine the corresponding preset determination model as:

[0028]

[0029] Where D represents the overhanging length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade to the upper end of the sunshade window;

[0030] When the height of the sunshade window is the second preset height, determine the corresponding preset determination model as:

[0031]

[0032] When the height of the sunshade window is the third preset height, determine the corresponding preset determination model as:

[0033]

[0034] When the height of the sunshade window is the fourth preset height, determine the corresponding preset determination model as:

[0035]

[0036] When the height of the sunshade window is the fifth preset height, the corresponding preset determination model is determined as:

[0037]

[0038] Among them, the first preset height, the second preset height, the third preset height, the fourth preset height, and the fifth preset height increase in sequence.

[0039] According to a method for determining the optimal overhanging length of a building overhanging sunshade provided by an embodiment of the present invention, the benefit model is obtained through the following steps:

[0040] Use building energy-saving performance hourly simulation software to conduct a comprehensive simulation of annual hourly sunshade and heat gain, and determine the annual heat gain and sunshade amount;

[0041] Based on the annual heat gain and sunshade amount, determine the benefit model.

[0042] The present invention also provides a device for determining the optimal overhanging length of a building overhanging sunshade, including:

[0043] A first acquisition unit for acquiring the target distance from the overhanging sunshade to the window to be shaded, and the target height of the window to be shaded; wherein, the target distance is the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded;

[0044] A second acquisition unit for acquiring an optimal overhanging length determination model;

[0045] An obtaining unit for processing the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade.

[0046] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for determining the optimal overhanging length of a building overhanging sunshade as described in any one of the above.

[0047] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the method for determining the optimal overhanging length of a building overhanging sunshade as described in any one of the above.

[0048] The present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the method for determining the optimal overhanging length of a building overhanging sunshade as described in any one of the above.

[0049] The method and device for determining the optimal overhanging length of the building overhanging sunshade provided by the embodiment of the present invention are not affected by building shapes, plane layouts, window-wall ratios, the thermal performance of exterior walls and windows, and window widths. By processing the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded and the target height of the window to be shaded through the optimal overhanging length determination model, the optimal overhanging length of the overhanging sunshade can be quickly determined, that is, it can ensure that the overhanging sunshade can achieve the optimal annual comprehensive benefit of taking into account the demand for reducing the heating load by obtaining solar heat in winter and the demand for reducing the air-conditioning load by blocking solar heat gain in summer. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 is one of the flow diagrams of the method for determining the optimal overhanging length of the building overhanging sunshade provided by the embodiment of the present invention;

[0052] Figure 2 is the assembly diagram of the building overhanging sunshade and the sunshade window provided by the embodiment of the present invention;

[0053] Figure 3 is the second flow diagram of the method for determining the optimal overhanging length of the building overhanging sunshade provided by the present invention;

[0054] Figure 4 is the third flow diagram of the method for determining the optimal overhanging length of the building overhanging sunshade provided by the present invention;

[0055] Figure 5 is the schematic diagram of the two-dimensional relationship curve between the annual sunshade benefit and the overhanging length of the overhanging sunshade when the 1416 window type provided by the present invention has different distances from the fixed position of the overhanging sunshade to the upper end of the sunshade window;

[0056] Figure 6 is the three-dimensional view of the overhanging length of the overhanging sunshade of the 1416 window type provided by the present invention, Ab / (Ab + h), and the annual sunshade comprehensive benefit value;

[0057] Figure 7 is Figure 6 the top view of;

[0058] Figure 8 is to Figure 5 the schematic diagram after interpolating the curve shown with mathematical software;

[0059] Figure 9 It is a distribution schematic diagram of multiple groups of optimal overhang lengths and Ab / (Ab+h) values in the actual simulation case of the 1416 window type provided by the present invention;

[0060] Figure 10 It is a schematic structural diagram of a device for determining the optimal overhang length of an external overhanging sunshade member of a building provided by the present invention;

[0061] Figure 11 It is a schematic structural diagram of an electronic device provided by the present invention.

[0062] Reference signs:

[0063] 101, external overhanging sunshade member; 102, sunshade window; 103, fixed corner member. Detailed implementation manners

[0064] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the protection scope of the present invention.

[0065] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] The following combines Figures 1-9 to describe the method for determining the optimal overhang length of an external overhanging sunshade member of an embodiment of the present invention.

[0067] Figure 1 One of the flow schematic diagrams of the method for determining the optimal overhang length of an external overhanging sunshade member provided by an embodiment of the present invention is exemplified, as Figure 1 shown. The process for determining the optimal overhang length of the external overhanging sunshade member includes the following steps:

[0068] Step 100, obtain the target distance from the external overhanging sunshade member to the sunshade window to be shaded, and the target height of the sunshade window to be shaded.

[0069] Among them, Figure 2 it exemplifies the assembly schematic diagram of the exterior overhanging sunshade member and the sunshaded window provided by the embodiment of the present invention. As Figure 2 shown, the exterior overhanging sunshade member 101 is placed above the sunshaded window (the window to be sunshaded), and there is a distance between the upper end of the exterior overhanging sunshade member 101 and the upper end of the sunshaded window 102. In this embodiment, the exterior overhanging sunshade member 101 adopts a sunshade board, and the sunshade board can be installed on the base wall through a fixing angle member 103. The fixing angle member 103 can be located above the sunshade board or below the sunshade board. The sunshade board realizes the function of fixed external sunshade. Figure 2 Among them, Ab represents the vertical distance between the fixing position (fixing point) of the exterior overhanging sunshade member 101 and the upper end (upper opening) of the sunshaded window 102. In addition, the horizontal projection length of the exterior overhanging sunshade member 101 is the overhanging length of the exterior overhanging sunshade member 101. Figure 2 Among them, D represents the overhanging length of the exterior overhanging sunshade member 101; the horizontal distance that the exterior overhanging sunshade member 101 extends along the side opening of the window beyond the side frame of the sunshaded window 102 is the overhanging width. Figure 2 Among them, E represents the overhanging width of the exterior overhanging sunshade member 101 relative to the outer window side frame.

[0070] It should be noted that in other embodiments, the sunshade board also includes a connected installation section and an overhanging section. The installation section of the sunshade board extends into the insulation layer and is installed on the base wall through a fixing angle member 103. The fixing angle member 103 can be located above the sunshade board, hidden between the insulation material and the wall, or below the sunshade board. The overhanging section of the sunshade board realizes the function of fixed external sunshade. Preferably, a heat insulation gasket can also be provided between the fixing angle member 103 and the base wall. The sunshaded window 102 is vertically arranged. Figure 2 Among them, Ab represents the vertical distance between the fixing position (fixing point) of the exterior overhanging sunshade member 101 and the upper end (upper opening) of the sunshaded window 102. In addition, the horizontal projection length of the exterior overhanging sunshade member 101 is the overhanging length of the exterior overhanging sunshade member 101.

[0071] It should be noted that through simulation research, it is found that the value of E has a weak sensitivity to the sunshade benefit and can be ignored. Therefore, the present invention does not consider the optimization value of this parameter. The designer can, according to the actual situation, select the value of E as appropriate on the premise of ensuring that the width of the sunshade member is not less than the width of the window to be sunshaded.

[0072] It can be understood that the overhanging section of the sunshade board includes a high-reflection coating, a galvanized steel plate, a sound insulation and noise reduction layer, and a corrosion-resistant and anti-aging high-performance layer stacked in sequence from bottom to top. In this embodiment, the galvanized steel plate is designed to be 3 mm.

[0073] Step 200, obtain the optimal overhanging length determination model.

[0074] It can be understood that based on the energy consumption simulation calculation software, through multiple simulation studies, the regular relationship between the shading design size and the annual comprehensive benefit is found, and the best projection length calculation formula of the cantilever shading component is summarized and refined. The best projection length of the cantilever shading component is related to the cantilever shading position and the height of the shading window. Based on the best projection length calculation formula, the best projection length determination model is determined.

[0075] Step 300: Process the target distance and target height through the best projection length determination model to obtain the best projection length of the cantilever shading component.

[0076] It can be understood that the height of the shading window and the cantilever shading position (Ab value) are used as the inputs of the best projection length determination model, and the best projection length is used as the output of the best projection length determination model. By determining the height of the shading window and the cantilever shading position (Ab value) and based on the best projection length determination model, the best projection length of the cantilever shading component can be quickly obtained, and then the practicability, economy, and coordination of the building style of the cantilever shading component can be judged in combination with the building design.

[0077] It can be understood that the obtained best projection length can significantly reduce the summer cooling load of the fixed cantilever shading, and at the same time hardly affect the winter heating load, achieving the optimal annual benefit.

[0078] The method for determining the best projection length of the building cantilever shading component provided by the embodiment of the present invention is not affected by the building shape, plane layout, window-wall ratio, exterior wall and window thermal performance, and window width. By processing the distance from the fixed position of the cantilever shading component to the upper end of the window to be shaded and the target height of the window to be shaded through the best projection length determination model, the best projection length of the cantilever shading component can be quickly determined, so as to ensure that the fixed cantilever shading component can take into account the comprehensive influence of winter and summer to achieve the optimal comprehensive benefit of annual shading and heat gain. The method for determining the projection length of the present invention is applicable to the simple calculation of fixed cantilever shading aiming at the optimal annual energy-saving performance. It only takes a few seconds to calculate the external shading size required for each project, which facilitates the design work considering the influence of shading components on energy conservation and carbon reduction in the scheme stage.

[0079] In an embodiment of the present invention, Figure 3 Schematically illustrates the second flow chart of the method for determining the best projection length of the building cantilever shading component provided by the present invention. As Figure 3 shown, the best projection length determination model is pre-obtained through the following steps:

[0080] Step 210: Obtain the preset determination models corresponding to multiple shading windows with different heights.

[0081] It is understandable that different window types of the sunshade window correspond to different window heights. For example, for window types 1416 and 1417, where the window type 1416 means the width of the sunshade window is 1.4 m and the height is 1.6 m, and the window type 1417 means the width of the sunshade window is 1.4 m and the height is 1.7 m.

[0082] It is understandable that sunshade windows with different window types (different heights) correspond to different preset determination models. Therefore, for different window types, preset determination models corresponding to multiple window types (different heights) are obtained.

[0083] Step 220: Perform fitting processing on all the preset determination models to obtain the optimal overhanging length determination model.

[0084] It is understandable that preset determination models corresponding to multiple window types can be obtained, and through fitting and optimization of the preset determination models corresponding to multiple window types (different heights), a general formula for calculating the optimal overhanging length of the external overhanging sunshade component can be summarized and determined as the optimal overhanging length determination model.

[0085] In another embodiment of the present invention, Figure 4 Illustrates the third schematic flow chart of the method for determining the optimal overhanging length of the external overhanging sunshade component provided by the present invention. As Figure 4 shown, the multiple heights include the first height. Taking the example of obtaining the preset determination model corresponding to the sunshade window with the first height, step 210 specifically includes the following steps:

[0086] Step 211: Based on the first preset step length, determine multiple reference overhanging lengths within the first preset range corresponding to the overhanging length of the external overhanging sunshade component; based on the second preset step length, determine multiple reference distances within the second preset range corresponding to the distance from the fixed position of the external overhanging sunshade component to the upper end of the sunshade window.

[0087] It is understandable that the first preset range corresponding to the overhanging length of the external overhanging sunshade component and the second preset range corresponding to the distance from the fixed position of the external overhanging sunshade component to the upper end of the sunshade window are determined.

[0088] In this embodiment, taking the window type of the sunshade window as 1416 as an example, the overhanging length of the external overhanging sunshade component and the distance from the fixed position of the external overhanging sunshade component to the upper end of the sunshade window are shown in Table 1;

[0089] Table 1

[0090]

[0091]

[0092] It can be understood that the first preset range is [0.1, 1.6] m, which is the range of values that the overhanging length of the overhanging sunshade member can take, and the first preset step length is 0.25 m; the second preset range is (0, 0.7] m, that is, the distance from the fixed position of the overhanging sunshade member to the upper end of the sunshade window can be designed as (0, 0.7] m in engineering, and the second preset step length is 0.05 m.

[0093] It should be noted that in other embodiments, the first preset step length and the second preset step length can be adaptively adjusted according to actual needs.

[0094] It can be understood that under the condition that the overhanging length range of the overhanging sunshade member is [0.1, 1.6] m and the first preset step length is 0.25, the determined multiple reference overhanging lengths can be 0.1 m, 0.35 m, 0.6 m, 0.85 m..., 1.6 m; under the condition that the distance from the fixed position of the overhanging sunshade member to the upper end of the sunshade window is (0, 0.7] m and the second preset step length is 0.05 m, the determined multiple reference distances can be 0.05 m, 0.10 m, 0.150 m, 0.20 m, 0.25 m, 0.30 m, 0.35 m, 0.40 m, 0.45 m, 0.50 m, 0.55 m, 0.60 m, 0.65 m, and 0.70 m.

[0095] Step 212: Through the benefit model, process the multiple reference overhanging lengths and the multiple reference distances to obtain a two-dimensional relationship curve between the multiple reference overhanging lengths and the multiple reference distances.

[0096] It can be understood that based on the multiple reference overhanging lengths and the multiple reference distances, and through the benefit model, the annual sunshade benefit function Tb of the 1416 window type is simulated nearly a thousand times to obtain a data cluster as Figure 5 shown, and then a two-dimensional relationship curve between the multiple reference overhanging lengths and the multiple reference distances is obtained.

[0097] Step 213: Based on the first height, convert the two-dimensional relationship curve into a three-dimensional relationship curve.

[0098] It can be understood that the first height is the height of the 1416 window type. By introducing the Ab / (Ab + h) value variable into the two-dimensional relationship curve between the multiple reference overhanging lengths and the multiple reference distances, the two-dimensional relationship curve is converted into a three-dimensional relationship curve, and the formed three-dimensional view is as Figure 6 shown.

[0099] It should be noted that h is the window height of the sunshade window, and in the 1416 window type, h = 1.6 m.

[0100] Step 214: Determine the model corresponding to the peak curve of the three-dimensional relationship curve as the preset determination model corresponding to the first height.

[0101] It can be understood that from Figure 6 it can be seen that regardless of how the Ab value (the h value is a constant) and the D value change, the peak value of Tb is concentrated on the Figure 6 red arrow indicated line in

[0102] It can be understood that Figure 7 is Figure 6 the top view of Figure 6 Switch the three-dimensional view of Figure 7 to the top view of Ab / (Ab + h) and the cantilever length shown in Figure 7 which highlights the relationship between the optimal cantilever length and the ratio of Ab / (Ab + h). The line covered by the arrow represents the set of points (line) with the best comprehensive annual sunshade benefit value. It can be found that the peak value of Tb falls on the line y = 1 / 3x; that is, when D = 3Ab / (Ab + h), Tb reaches the peak value. That is, when designing the cantilever sunshade, after determining the Ab value, 3Ab / (Ab + h) can be determined as the optimal cantilever length.

[0103] It can be understood that in the 1416 window type, D = 3Ab / (Ab + h) is determined as the preset determination model corresponding to the first height.

[0104] It can be understood that for the 1416 window type, given the target height of the window to be shaded (that is, the h value) and the distance from the fixed position of the cantilever sunshade member to the upper end of the window to be shaded (that is, the Ab value), and based on D = 3Ab / (Ab + h), the corresponding optimal cantilever length can be calculated.

[0105] Furthermore, step 213 can be specifically implemented in the following manner:

[0106] Perform interpolation processing on the two-dimensional relationship curve to obtain the target relationship curve.

[0107] Based on the first height, convert the target relationship curve into a three-dimensional relationship curve.

[0108] It can be understood that after determining the two-dimensional relationship curve between multiple reference cantilever lengths and multiple reference distances, data clustering can be performed based on data analysis software, and interpolation processing can be performed on the two-dimensional relationship curve to further reduce the step size of variables (the second preset step size corresponding to the cantilever length of the cantilever sunshade member and the first preset step size corresponding to the distance from the fixed position of the cantilever sunshade member to the upper end of the sunshade window), to obtain the target relationship curve, as Figure 8 shown in Figure 8 is to Figure 5The curve shown is interpolated using mathematical software for deriving the calculation formula of the optimal overhanging length. The mathematical formula describes a continuous model. However, the energy consumption simulation belongs to a discrete model. Through mathematical analysis software, the results of thousands of discrete simulations are fitted into a smoother model closer to the continuous model with a million-point set, that is, as Figure 8 shown, for deriving the mathematical formula; introducing the variable of the value of Ab / (Ab + h) into the target relationship curve to convert the target relationship curve into a three-dimensional relationship curve, and the formed three-dimensional view is as Figure 6 shown, Figure 6 has been interpolated based on the preset step size.

[0109] In an embodiment of the present invention, the benefit model is obtained through the following:

[0110] Using building energy-saving performance hourly simulation software (including building thermophysics, building ventilation, building energy consumption, and building daylighting, with a step size less than or equal to 1 hour) to conduct a comprehensive benefit simulation of annual hourly sunshading and heat gain, determine the annual heat gain, and then calculate and determine the sunshading amount;

[0111] Determine the benefit model based on the annual heat gain and sunshading amount.

[0112] It can be understood that based on the performance-based design method commonly used in the design process of ultra-low energy consumption buildings, the embodiments of the present invention compare different sizes, and verify that taking the total load of air conditioning and heating as the evaluation target, not all fixed external sunshades on the south facade have a positive effect.

[0113] In this embodiment, the research process uses Energyplus building energy-saving performance hourly simulation software for simulation. The simulation model uses a classic old community in cold regions with a household type of about 50m 2 or so, and applies the meteorological parameters in cold regions as the surrounding environment parameters.

[0114] Based on the simulation, it is obtained that the main heating in cold regions is from November, December, January, February, and March; the main cooling is from June, July, August, and September.

[0115] Tb = summer sunshading amount - winter sunshading amount = (sunshading amount in June, July, August, and September) - (sunshading amount in November, December, January, February, and March);

[0116] It can be understood that the building energy-saving performance hourly simulation software can be used to conduct the annual sunshading amount simulation calculation, and determine the benefit model (Total benefits function of benefits) based on the annual sunshading amount. The Tb function has no association with the household type and load. Therefore, the method for determining the optimal overhanging length of the external overhanging sunshading component of buildings in cold regions derived based on the Tb function has no association with the household type and has a wider applicability.

[0117] It should be noted that the comprehensive benefit (comprehensive income) calculation method given in the prior art does not consider the cumulative effect hour by hour throughout the year, and cannot accurately obtain the comprehensive benefit that takes into account heat gain in winter and sunshading in summer; while the embodiments of the present invention inherit the accuracy of hourly energy consumption simulation, and the data used to fit the simple calculation method is derived from energy consumption simulation. In each simulation, the sunshading effect of the fixed external sunshade for 8,760 hours throughout the year is calculated, and at the same time, the influence of sunshading on solar heat gain in winter and summer is considered. The income model fitted based on a large amount of data ensures the accuracy of sunshading amount simulation, and further ensures the accuracy of determining the size of the cantilever sunshade.

[0118] Optionally, after determining the preset determination model corresponding to the 1416 window type, the optimal cantilever length can be obtained based on D = 3Ab / (Ab + h). In order to verify the accuracy of the preset determination model corresponding to the 1416 window type, the embodiments of the present invention obtain multiple groups of optimal cantilever lengths and Ab / (Ab + h) in actual simulation cases, such as Figure 9 shown, through Figure 9 It can be seen that whether it is a fine-grained model or a coarse-grained model, the final cantilever length D falls at 3Ab / (Ab + h).

[0119] Optionally, step 210 can be specifically implemented in the following manner:

[0120] When the height of the sunshading window is the first preset height, the corresponding preset determination model is determined as:

[0121]

[0122] When the height of the sunshading window is the second preset height, the corresponding preset determination model is determined as:

[0123]

[0124] When the height of the sunshading window is the third preset height, the corresponding preset determination model is determined as:

[0125]

[0126] When the height of the sunshading window is the fourth preset height, the corresponding preset determination model is determined as:

[0127]

[0128] When the height of the sunshading window is the fifth preset height, the corresponding preset determination model is determined as:

[0129]

[0130] Among them, the first preset height, the second preset height, the third preset height, the fourth preset height, and the fifth preset height increase in sequence.

[0131] It can be understood that for sunshade windows of different window types (with different heights), the corresponding preset determination models are different. Therefore, for different window types, the preset determination models corresponding to multiple window types (with different heights) are obtained. The above steps 211 to 214 are used to determine the preset determination model corresponding to the 1416 window type. Then, the method of steps 211 to 214 can be used to determine the preset determination models corresponding to sunshade windows of multiple other window types (multiple heights).

[0132] This embodiment gives the preset determination models corresponding to the 1416 window type, the 1417 window type, the 1418 window type, the 1419 window type, and the 1420 window type, which are specifically as follows:

[0133] For the 1416 window type, the height of the sunshade window is 1.6 m, and the determined corresponding preset determination model is formula (2):

[0134]

[0135] For the 1417 window type, the height of the sunshade window is 1.7 m, and the determined corresponding preset determination model is formula (3):

[0136]

[0137] For the 1418 window type, the height of the sunshade window is 1.8 m, and the determined corresponding preset determination model is formula (4):

[0138]

[0139] For the 1419 window type, the height of the sunshade window is 1.9 m, and the determined corresponding preset determination model is formula (5):

[0140]

[0141] For the 1420 window type, the height of the sunshade window is 2.0 m, and the determined corresponding preset determination model is formula (6):

[0142]

[0143] Correspondingly, step 220 can be specifically implemented in the following manner:

[0144] By performing fitting optimization on the preset determination models corresponding to the 1416 window type, the 1417 window type, the 1418 window type, the 1419 window type, and the 1420 window type, the best picking-out length determination model is determined as:

[0145]

[0146] Wherein, D represents the overhanging length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade member to the upper end of the sunshade window.

[0147] It can be understood that by fitting formulas (2) to (6), the general calculation formula (1) for the overhanging length is determined, so that based on formula (1), the optimal overhanging length of any window type can be quickly calculated.

[0148] It can be understood that based on tens of thousands of refined energy consumption simulation data, the embodiment of the present invention fits the optimal overhanging length determination model. Through the optimal overhanging length determination model, the optimal overhanging length value of the horizontal fixed external sunshade can be quickly and accurately determined. The calculation speed of this optimal overhanging length value is very fast, which is very suitable for determining the optimal overhanging length in the initial stage of design. The calculation process does not require the use of any simulation software, and the process of calculating the optimal overhanging length is simple and convenient.

[0149] It should be noted that to determine the optimal overhanging length based on the optimal overhanging length determination model, no computer is needed. Only the sunshade height and the installation position of the overhanging sunshade need to be known. Moreover, the optimal overhanging length has no relation with the thermal performance of the external window and other building envelopes, the house type, etc. It is applicable to any external window with any k value and SHGC value, and any building function and any building of any era. Therefore, the present invention has high practicability in determining the optimal overhanging length based on the optimal overhanging length determination model.

[0150] It should be noted that the preset determination models obtained in this embodiment are those corresponding to window types 1416, 1417, 1418, 1419, and 1420. In other embodiments, it can also be based on the preset determination models corresponding to multiple other window types to determine the general optimal overhanging length determination model.

[0151] It should be noted that in the prior art, the optimal D value can be determined through energy consumption simulation, but its calculation time is long and the calculation personnel need to be proficient in using simulation software. However, the embodiment of the present invention can help designers quickly and accurately determine the optimal overhanging length value of the horizontal fixed external sunshade through the optimal overhanging length determination model, and the calculated optimal value of the overhanging length (abbreviation: D value) of the fixed overhanging sunshade can comprehensively consider the comprehensive effects of the sunshade component in summer and winter.

[0152] Next, the device for determining the optimal overhanging length of the building overhanging sunshade member provided by the present invention will be described. The device for determining the optimal overhanging length of the building overhanging sunshade member described below can be correspondingly referred to the method for determining the optimal overhanging length of the building overhanging sunshade member described above.

[0153] Figure 10Schematically illustrates the structure of the device for determining the optimal overhanging length of the building overhanging sunshade provided by the present invention, as Figure 10 shown. The device for determining the optimal overhanging length of the building overhanging sunshade includes a first acquisition unit 1001, a second acquisition unit 1002, and a obtaining unit 1003; wherein:

[0154] The first acquisition unit 1001 is configured to acquire the target distance from the overhanging sunshade to the window to be shaded, and the target height of the window to be shaded; wherein, the target distance is the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded.

[0155] The second acquisition unit 1002 is configured to acquire the optimal overhanging length determination model.

[0156] The obtaining unit 1003 is configured to process the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade.

[0157] The device for determining the optimal overhanging length of the building overhanging sunshade provided by the embodiment of the present invention processes the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded and the target height of the window to be shaded through the optimal overhanging length determination model, and can quickly determine the optimal overhanging length of the overhanging sunshade, so as to ensure that the fixed overhanging sunshade member can take into account the comprehensive influence of winter and summer to achieve the optimal comprehensive benefit of annual sunshade and heat gain.

[0158] Based on any of the above embodiments, the second acquisition unit 1002 is specifically configured to:

[0159] Acquire the preset determination models corresponding to multiple sunshade windows with different heights;

[0160] Perform fitting processing on all the preset determination models to obtain the optimal overhanging length determination model.

[0161] Based on any of the above embodiments, the multiple heights include a first height; the second acquisition unit 1002 is further specifically configured to:

[0162] Based on the first preset step, determine multiple reference overhanging lengths within the first preset range corresponding to the overhanging length of the overhanging sunshade;

[0163] Based on the second preset step, determine multiple reference distances within the second preset range corresponding to the distance from the fixed position of the overhanging sunshade to the upper end of the sunshade window;

[0164] Through the benefit model, process the multiple reference overhanging lengths and the multiple reference distances to obtain the two-dimensional relationship curve between the multiple reference overhanging lengths and the multiple reference distances;

[0165] Based on the first height, convert the two-dimensional relationship curve into a three-dimensional relationship curve;

[0166] Determine the model corresponding to the peak curve of the three-dimensional relationship curve as the preset determination model corresponding to the first height.

[0167] Based on any of the above embodiments, the second acquisition unit 1002 is further specifically configured to:

[0168] Perform interpolation processing on the two-dimensional relationship curve to obtain a target relationship curve;

[0169] Based on the first height, convert the target relationship curve into a three-dimensional relationship curve.

[0170] Based on any of the above embodiments, the second acquisition unit 1002 is further specifically configured to:

[0171] Determine that the optimal picking length determination model is:

[0172]

[0173] Where D represents the picking length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade member to the upper end of the sunshade window.

[0174] Based on any of the above embodiments, the second acquisition unit 1002 is further specifically configured to:

[0175] In the case where the height of the sunshade window is the first preset height, determine that the corresponding preset determination model is:

[0176]

[0177] Where D represents the picking length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade member to the upper end of the sunshade window;

[0178] In the case where the height of the sunshade window is the second preset height, determine that the corresponding preset determination model is:

[0179]

[0180] In the case where the height of the sunshade window is the third preset height, determine that the corresponding preset determination model is:

[0181]

[0182] In the case where the height of the sunshade window is the fourth preset height, determine that the corresponding preset determination model is:

[0183]

[0184] In the case where the height of the sunshade window is the fifth preset height, determine that the corresponding preset determination model is:

[0185]

[0186] Among them, the first preset height, the second preset height, the third preset height, the fourth preset height, and the fifth preset height increase in sequence.

[0187] Based on any of the above embodiments, the second acquisition unit 1002 is further specifically configured to:

[0188] Use building energy-saving performance hourly simulation software to conduct a comprehensive annual hourly simulation of sunshading and heat gain benefits, and determine the annual heat gain and sunshading amount;

[0189] Based on the annual heat gain and sunshading amount, determine the benefit model.

[0190] Figure 11 Illustrates a schematic physical structure diagram of an electronic device, as Figure 11 shown. The electronic device may include: a processor 1110, a communication interface 1120, a memory 1130, and a communication bus 1140. Among them, the processor 1110, the communication interface 1120, and the memory 1130 complete mutual communication through the communication bus 1140. The processor 1110 can call the logical instructions in the memory 1130 to execute the method for determining the optimal overhanging length of the building overhanging sunshading member. The method includes: obtaining the target distance from the overhanging sunshading member to the window to be shaded, and the target height of the window to be shaded; where the target distance is the distance from the fixed position of the overhanging sunshading member to the upper end of the window to be shaded; obtaining the optimal overhanging length determination model; through the optimal overhanging length determination model, processing the target distance and the target height to obtain the optimal overhanging length of the overhanging sunshading member.

[0191] In addition, when the logical instructions in the above-mentioned memory 1130 are implemented in the form of software functional units and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. And the aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs and other various media that can store program codes.

[0192] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for determining the optimal overhanging length of the overhanging sunshade provided by the above-mentioned various methods. The method includes: obtaining the target distance from the overhanging sunshade to the window to be shaded, and the target height of the window to be shaded; wherein the target distance is the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded; obtaining the optimal overhanging length determination model; and processing the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade.

[0193] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the method for determining the optimal overhanging length of the building overhanging sunshade provided by the above-mentioned various methods. The method includes: obtaining the target distance from the overhanging sunshade to the window to be shaded, and the target height of the window to be shaded; wherein the target distance is the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded; obtaining the optimal overhanging length determination model; and processing the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade.

[0194] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0195] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0196] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; 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 they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for determining the optimal overhanging length of a building overhanging sunshade component, characterized in that, it includes: Obtain the target distance from the overhanging sunshade component to the window to be shaded, and the target height of the window to be shaded; wherein, the target distance is the distance from the fixed position of the overhanging sunshade component to the upper end of the window to be shaded; Obtain the optimal overhanging length determination model; Through the optimal overhanging length determination model, process the target distance and the target height to obtain the optimal overhanging length of the overhanging sunshade component; The optimal overhanging length determination model is pre-obtained through the following steps: Obtain the preset determination models corresponding to multiple sunshade windows with different heights, specifically including: Based on the first preset step length, determine multiple reference overhanging lengths within the first preset range corresponding to the overhanging length of the overhanging sunshade component; Based on the second preset step length, determine multiple reference distances within the second preset range corresponding to the distance from the fixed position of the overhanging sunshade component to the upper end of the sunshade window; Through the benefit model, process the multiple reference overhanging lengths and the multiple reference distances to obtain the two-dimensional relationship curve between the multiple reference overhanging lengths and the multiple reference distances; Based on the first height, convert the two-dimensional relationship curve into a three-dimensional relationship curve; Determine the model corresponding to the peak curve of the three-dimensional relationship curve as the preset determination model corresponding to the first height; wherein, the multiple heights include the first height; Perform fitting processing on all the preset determination models to obtain the optimal overhanging length determination model; the optimal overhanging length determination model is: wherein, D represents the overhanging length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade component to the upper end of the sunshade window; wherein, the benefit model is obtained through the following steps: Use building energy-saving performance hourly simulation software to conduct annual hourly comprehensive benefit simulation of sunshading and heat gain, and determine the annual heat gain and sunshading amount; Based on the annual heat gain and sunshading amount, determine the benefit model.

2. The method for determining the optimal overhanging length of a building overhanging sunshade component according to claim 1, characterized in that, The converting the two-dimensional relationship curve into a three-dimensional relationship curve based on the first height includes: Perform interpolation processing on the two-dimensional relationship curve to obtain a target relationship curve; Based on the first height, convert the target relationship curve into a three-dimensional relationship curve.

3. The method for determining the optimal overhanging length of a building overhanging sunshade component according to claim 1, characterized in that, The obtaining the preset determination models corresponding to multiple sunshade windows with different heights includes: When the height of the sunshade window is the first preset height, determine the corresponding preset determination model as: wherein, D represents the overhanging length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade component to the upper end of the sunshade window; When the height of the sunshade window is the second preset height, determine the corresponding preset determination model as: When the height of the sunshade window is the third preset height, determine the corresponding preset determination model as: When the height of the sunshade window is the fourth preset height, determine the corresponding preset determination model as: When the height of the sunshade window is the fifth preset height, the corresponding preset determination model is determined as: Among them, the first preset height, the second preset height, the third preset height, the fourth preset height, and the fifth preset height increase in sequence.

4. A device for determining the optimal overhanging length of a building overhanging sunshade Characterized in that It includes: A first acquisition unit, configured to acquire the target distance from the overhanging sunshade to the window to be shaded, and the target height of the window to be shaded; wherein, the target distance is the distance from the fixed position of the overhanging sunshade to the upper end of the window to be shaded; A second acquisition unit, configured to acquire an optimal overhanging length determination model; A obtaining unit, configured to process the target distance and the target height through the optimal overhanging length determination model to obtain the optimal overhanging length of the overhanging sunshade; Among them, the second acquisition unit is used to acquire the preset determination models corresponding to sunshade windows with different heights, specifically including: determining a plurality of reference overhanging lengths within a first preset range corresponding to the overhanging length of the overhanging sunshade based on a first preset step; determining a plurality of reference distances within a second preset range corresponding to the distance from the fixed position of the overhanging sunshade to the upper end of the sunshade window based on a second preset step; processing the plurality of reference overhanging lengths and the plurality of reference distances through a benefit model to obtain a two-dimensional relationship curve between the plurality of reference overhanging lengths and the plurality of reference distances; converting the two-dimensional relationship curve into a three-dimensional relationship curve based on a first height; determining the model corresponding to the peak curve of the three-dimensional relationship curve as the preset determination model corresponding to the first height; wherein, the plurality of heights include the first height; Performing a fitting process on all the preset determination models to obtain the optimal overhanging length determination model; the optimal overhanging length determination model is: Among them, D represents the overhanging length, h represents the height of the sunshade window, and Ab represents the distance from the fixed position of the overhanging sunshade to the upper end of the sunshade window; The second acquisition unit is further configured to: perform a comprehensive benefit simulation of annual hourly sunshade and heat gain using building energy performance hourly simulation software to determine the annual heat gain and sunshade amount; determine a benefit model based on the annual heat gain and sunshade amount.

5. An electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor Characterized in that When the processor executes the program, it implements the method for determining the optimal overhanging length of a building overhanging sunshade according to any one of claims 1 to 3.

6. A non-transitory computer-readable storage medium, on which a computer program is stored Characterized in that When the computer program is executed by a processor, it implements the method for determining the optimal overhanging length of a building overhanging sunshade according to any one of claims 1 to 3.

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