Evaluation system for evaluating daylight self-sufficiency and daylight exposure.

Abstract

To provide an evaluation system for evaluating a daylight independence rate and a daylight exposure rate, capable of more simply calculating an indoor daylight independence rate and daylight exposure rate through an opening part in a state where a vertical louver is installed in the opening part in a building.SOLUTION: A processing device 10 of an evaluation system 1 comprises: a condition setting unit 12 that sets dimensions of the wing plate member 51 that constitutes a vertical louver 5, and a size of an interval between the adjacent wing plate members 51; a daylight independence rate calculation unit 14 that calculates a daylight independence rate using the following formula (1) based on the vertical louver 5 set by the condition setting unit 12; and a daylight exposure rate calculation unit 16 that calculates a daylight exposure rate using the following formula (2): sDA300 / 50%=α×(S' / S)2×K ...(1); ASE1000 / 250=α'×(S' / S)2×K' ...(2).SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate in a room through an opening when a vertical louver or eaves is installed at the opening of a building.

Background Art

[0002] Conventionally, a processing device for calculating a heat load or the like acting in a room by solar radiation has been proposed (see Patent Document 1). However, in recent years, not only the heat load but also the comfort of the space by daylight throughout the year has been emphasized, and in accordance with the daylight evaluation method (IES LM-83-12) proposed by the Illuminating Engineering Society of North America (IES), the space daylight self-sufficiency and annual solar radiation amount may be calculated. Specifically, as these indexes, the daylight self-sufficiency rate (sDA) and the daylight exposure rate (ASE) are used. These indexes were developed by the U.S. Green Building Council (USGBC) for the purpose of evaluating the environmental performance of buildings and are also used in evaluation systems used worldwide.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, it is generally known that the daylight self-sufficiency rate and the daylight exposure rate can be calculated by commercially available software. When calculating these, an analysis model specifying detailed dimensions such as the floor plan including the opening of the building needs to be created and calculated. In particular, when a vertical louver or eaves is installed at the opening, a model needs to be created and recalculated, which is troublesome.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide an evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate that can more easily calculate the daylight self-sufficiency rate and daylight exposure rate indoors through an opening in a state where a vertical louver or eaves is installed.

Means for Solving the Problems

[0006] In view of the above problems, an evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate according to the first aspect of the present invention is an evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate indoors through an opening in a state where a vertical louver in which a plurality of louver members extending along the vertical direction are held at intervals in the horizontal direction is installed in an opening of a building. The daylight self-sufficiency rate is the area ratio of an indoor area where the annual time when the illuminance on the desk surface indoors is 300 lx or more is 50% or more of the annual daytime hours. The daylight exposure rate is the area ratio of an indoor area where the annual time when the illuminance on the desk surface is 1000 lx or more is 250 hours or more. The evaluation system includes a processing device that calculates the daylight self-sufficiency rate and daylight exposure rate to be evaluated. The processing device includes an analysis result registration unit in which analysis results of the daylight self-sufficiency rate and the daylight exposure rate with only the opening and without the vertical louver are registered, a condition setting unit that sets conditions for the dimensions of the louver members constituting the vertical louver and the size of the interval between adjacent louver members, a daylight self-sufficiency rate calculation unit that calculates the daylight self-sufficiency rate in a state where the vertical louver is installed based on the registered analysis result of the daylight self-sufficiency rate and the set conditions by the following formula (1), and a daylight exposure rate calculation unit that calculates the daylight exposure rate in a state where the vertical louver is installed based on the registered analysis result of the daylight exposure rate and the set conditions by the following formula (2). It is characterized by comprising:

[0007] sDA 300 / 50% =α×(S’ / S) 2 ×K…(1) ASE 1000 / 250 =α’×(S’ / S) 2 ×K’…(2) However, sDA 300 / 50% : The daylight self-supporting ratio when the vertical louvers are installed. ASE 1000 / 250 : The daylight exposure rate with the vertical louvers installed α: Analysis result of the daylight self-sufficiency rate with only the opening and without the vertical louvers. α': Analysis result of the daylight exposure rate with only the opening and without the vertical louvers. S': The area of ​​the opening visible through the vertical louvers when viewed from a direction perpendicular to the opening. S: Area of ​​the opening K: First correction coefficient K': Second correction coefficient That is the case.

[0008] Normally, the daylight self-sufficiency and daylight exposure rates analyzed under conditions with only the opening present are expected to be proportional to the opening ratio S' / S specified for the vertical louvers. However, the inventors discovered that this expectation is incorrect. Specifically, the inventors found that the daylight self-sufficiency and daylight exposure rates analyzed with only the opening present (without the vertical louvers installed) are proportional to the specification conditions (S' / S) for the vertical louvers. 2 We obtained new insights indicating a proportional relationship between them.

[0009] The first invention is based on the inventor's new findings. According to the first invention, by simply registering the analysis results of the daylight self-supporting ratio and daylight exposure ratio of only the opening in the analysis result registration unit in advance, the specifications of the vertical louvers (S' / S) 2 By simply calculating these factors, it is possible to easily grasp how the daylight self-sufficiency rate and daylight exposure rate change when vertical louvers are installed, and to understand the trend of these changes. In particular, when the depth dimension of the vertical louvers in the direction toward the opening is constant under the specifications of multiple vertical louvers, it is possible to more accurately evaluate the trend of changes in the daylight self-sufficiency rate and daylight exposure rate when vertical louvers are installed for vertical louvers with different specifications.

[0010] As a more preferable aspect, the processing device includes a first correction coefficient calculation unit that calculates the first correction coefficient according to the following formula (3), and a second correction coefficient calculation unit that calculates the second correction coefficient according to the following formula (4). K = ax 2 + bx + c…(3) K’ = a’x 2 ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The second evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate according to the present invention is an evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate of a room through an opening, with an overhang installed along the upper edge of the opening of a building, wherein the daylight self-sufficiency rate is the area ratio of the room area where the annual time during which the desk surface illuminance in the room is 300 lx or more is 50% or more of the annual daylight hours, and the daylight exposure rate is the area ratio of the room area where the annual time during which the desk surface illuminance is 1000 lx or more is 250 hours or more, and the evaluation system comprises a processing unit for calculating the daylight self-sufficiency rate and daylight exposure rate to be evaluated. The apparatus comprises: an analysis result registration unit that registers the analysis results of the daylight self-sufficiency rate and the daylight exposure rate for a state where there is no awning and only the opening; a condition setting unit that sets the depth dimension of the awning in the direction from the outside to the inside; a daylight self-sufficiency rate calculation unit that calculates the daylight self-sufficiency rate with the awning installed using the following formula (5) based on the registered analysis results of the daylight self-sufficiency rate and the set depth dimension; and a daylight exposure rate calculation unit that calculates the daylight exposure rate with the awning installed using the following formula (6) based on the registered analysis results of the daylight exposure rate and the set depth dimension.

[0013] sDA 300 / 50% =α×(dx+e)…(5) ASE 1000 / 250 =α'×(d'x+e')…(6) however, sDA 300 / 50% : Daylight self-sufficiency with the aforementioned canopy installed ASE 1000 / 250 : Daylight exposure rate with the aforementioned canopy installed α: Analysis result of the daylight self-sufficiency with only the opening and no awning α': Analysis result of the daylight exposure rate with only the opening and no awning. x: Depth dimension of the eaves in the direction from the outside to the inside [mm] d: -0.0003 (constant) e: A constant in the range of 0.995 to -0.997 d': -0.0003 (constant) e': A constant in the range of 0.990 to -0.994 That is the case.

[0014] This invention is based on the new finding that by identifying a correction coefficient using a linear function with the depth dimension of the eaves as a variable, the daylight self-sufficiency and daylight exposure rates with the eaves installed can be calculated with greater accuracy. According to the second invention, by simply registering the analysis results of the daylight self-sufficiency and daylight exposure rates for the opening only in the analysis result registration unit in advance, the daylight self-sufficiency and daylight exposure rates can be accurately calculated by inputting only the depth dimension of the eaves in the direction from the outside to the inside. Therefore, based on the linear functions shown in equations (5) and (6) above, constants are set from the ranges of the coefficients d, e and d', e' of these linear functions, and the first and second correction coefficients are calculated, thereby enabling the calculation of the daylight self-sufficiency and daylight exposure rates with the eaves installed with greater accuracy. [Effects of the Invention]

[0015] According to the first invention, when vertical louvers are installed in an opening of a building, the daylight self-sufficiency rate and daylight exposure rate of the room through the opening can be calculated more easily. According to the second invention, when an overhang is installed along the upper edge of an opening of a building, the daylight self-sufficiency rate and daylight exposure rate of the room through the opening can be calculated more easily. [Brief explanation of the drawing]

[0016] [Figure 1] (a) is a schematic perspective view of the vertical louvers as seen from the outside of the building in this embodiment of the first invention, and (b) is a schematic perspective view of the vertical louvers as seen from inside the building. [Figure 2] This is a schematic diagram of an evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate according to the present embodiment of the first invention. [Figure 3] This is a block diagram of the processing apparatus according to the present embodiment of the first invention. [Figure 4] Figure 1 is an enlarged cross-sectional view of a vertical louver oriented horizontally. [Figure 5](a) is a plan view illustrating the area of ​​the opening, and (b) is a plan view illustrating the area of ​​the opening other than the vertical louvers when viewed from a direction perpendicular to the opening. [Figure 6] (a) is a graph illustrating the depth dimension of the vertical louvers in the direction toward the opening and the quadratic functions of the first and second correction coefficients, and (b) is a graph for setting the range of the coefficients of the quadratic function obtained in (a). [Figure 7] This is a schematic perspective view of the opening and the eaves above the opening, as seen from the outside of the building, in this embodiment of the second invention. [Figure 8] (a) is a graph illustrating the linear functions of the depth dimension of the eaves in the direction from the outside to the inside, and the first and second correction coefficients, while (b) is a graph for setting the range of the coefficients of the linear function obtained in (a). [Figure 9] This is a workflow diagram using the processing apparatus according to the second embodiment of the invention. [Modes for carrying out the invention]

[0017] The evaluation systems for evaluating the daylight self-sufficiency rate and daylight exposure rate according to the embodiments of the first and second inventions will be described below with reference to Figures 1 to 9.

[0018] [Regarding the embodiment of the first invention] 1. Regarding the openings 7 and vertical louvers 5 of building 100 Figure 1(a) is a schematic perspective view of the vertical louvers as seen from the outside of the building in this embodiment of the first invention, and Figure 1(b) is a schematic perspective view of the vertical louvers as seen from inside the building. The evaluation system 1 according to this embodiment is a system for evaluating the daylight self-sufficiency rate and daylight exposure rate of the room 21 through the opening 7 when the vertical louvers 5 are installed in the opening 7 of the building 100.

[0019] In this embodiment, a window pane 71 is installed in the opening 7, and a vertical louver 5 is installed on the wall portion 4 of the building 100 so as to cover the opening 7. In this embodiment, the vertical louver 5 is composed of a plurality of elongated slat members 51, 51, ... extending along the vertical direction, and adjacent slat members 51, 51 are held at equal intervals (equal pitches) in the horizontal direction.

[0020] 2. Hardware configuration of evaluation system 1 Figure 2 is a schematic diagram of the evaluation system 1 according to the first embodiment. The evaluation system 1 has a processing unit 10 as hardware, which includes a storage unit 10A composed of ROM, RAM, etc., and an arithmetic unit 10B composed of a CPU, etc. The storage unit 10A records conditions such as a program including mathematical formulas for calculations to be described later, the dimensions of the opening 7 of the building 100, the dimensions of the slat members 51, and the size of the gaps between adjacent slat members 51, 51, and the arithmetic unit 10B executes the program, etc.

[0021] The evaluation system 1 may include an input device 31 and an output device 32. In this case, the input device 31 and the output device 32 are connected to the processing unit 10. In this embodiment, the input device 31 and the output device 32 may be integrated into a touch panel display.

[0022] Using the input device 31, initial conditions for executing the program described above (for example, the dimensions of the wing members, their spacing, however, in the embodiment of the second invention described later, the depth dimension of the canopy) and program data are input. The data input by the input device 31 is stored in the storage unit 10A. The output device 32 displays the results calculated by the processing unit 10.

[0023] The evaluation system 1 according to this embodiment evaluates the daylight self-sufficiency rate and the daylight exposure rate. Here, the daylight self-sufficiency rate is the area ratio of the indoor area where the annual time during which the desk surface illuminance in the indoor area 21 is 300 lx or more is 50% or more of the annual daytime hours. The annual daytime hours refer to the total time during which natural light enters the indoor area in a year. The higher the value of the daylight self-sufficiency rate, the more effectively daylight is being utilized, and according to the LEED (Leadership in Energy & Environmental Design) standards, points are awarded for a rate of 55% or higher. The daylight exposure rate is the area ratio of the indoor area where the annual time during which the desk surface illuminance is 1000 lx or more is 250 hours or more. The lower the value of the daylight exposure rate, the less discomfort caused by sunlight is being suppressed, and according to the LEED standards, a rate of less than 10% is recommended. Here, the desk surface illuminance refers to the illuminance at a specific height from the floor surface in the room, and the illuminance of the floor surface may be used as the standard. The area ratio of the interior space is the ratio of the floor area of ​​the room that meets each condition to the total floor area of ​​the room.

[0024] 3. Software configuration of the processing unit 10 In this embodiment, as shown in Figure 3, the processing device 10 includes at least an analysis result registration unit 11, a condition setting unit 12, a first correction coefficient calculation unit 13, a daylight self-sufficiency calculation unit 14, a second correction coefficient calculation unit 15, and a daylight exposure rate calculation unit 16.

[0025] 3-1. About the Analysis Result Registration Unit 11 The analysis result registration unit 11 registers the analysis results for the daylight self-sufficiency rate and daylight exposure rate for the opening 7 only, without the vertical louvers 5 (and without the canopy 52 in the embodiment of the second invention). Here, multiple daylight self-sufficiency rates and daylight exposure rates for different initial conditions, such as the size of the opening 7 and the size of the room, may be registered. By registering multiple daylight self-sufficiency rates and daylight exposure rates for different initial conditions, the daylight self-sufficiency rate and daylight exposure rate with the vertical louvers 5 installed can be easily calculated simply by setting the specifications of the vertical louvers 5 to be evaluated in the condition setting unit 12 below.

[0026] 3-2. Regarding the condition setting unit 12 Figure 4 is a cross-sectional view of a slat member 51 of a vertical louver 5 that is aligned horizontally. The condition setting unit 12 sets the dimensions of the slat members 51 that constitute the vertical louver 5 and the size S of the gap between adjacent slat members 51 based on input from the input device 31. For example, in this embodiment, as shown in Figure 4, the dimensions of the slat member 51 are set to the thickness t and depth x of the slat member 51. In this embodiment, the spacing (pitch) P between adjacent slat members 51 is equal and corresponds to the sum of the thickness t of the slat member 51 and the size S of the gap between the slat members 51. The size S of the gap is the distance between the surfaces of opposing slat members 51, 51 when multiple slat members 51, 51 are arranged together, along the direction of arrangement (horizontal direction).

[0027] 3-3. Daylight self-sufficiency calculation unit 14 and daylight exposure rate calculation unit 16 Before describing the first correction coefficient calculation unit 13 and the second correction coefficient calculation unit 15, the daylight self-supporting rate calculation unit 14 and the daylight exposure rate calculation unit 16 will be described below. In this embodiment, the first correction coefficient calculation unit 13 and the second correction coefficient calculation unit 15 are provided, but these configurations may be omitted and specific constants may be input. In particular, it is effective for evaluating the daylight self-supporting rate and daylight exposure rate of vertical louvers 5 under the condition that the depth dimension x of the vertical louvers 5 is the same, but the thickness of the slat members 51 and the spacing between the slat members 51, 51 are different.

[0028] The daylight self-sufficiency calculation unit 14 calculates the daylight self-sufficiency with the vertical louvers 5 installed using the following formula (1), based on the analysis results of the initial conditions to be evaluated from the daylight self-sufficiency registers in the analysis result registration unit 11 and the conditions of the vertical louvers 5 set in the condition setting unit 12. The daylight exposure rate calculation unit 16 calculates the daylight exposure rate with the vertical louvers installed using the following formula (2), based on the analysis results of the initial conditions to be evaluated from the daylight self-sufficiency registers in the analysis result registration unit 11 and the conditions of the vertical louvers 5 set in the condition setting unit 12.

[0029] sDA 300 / 50% =α × (S' / S)2 ×K…(1) ASE 1000 / 250 =α'×(S' / S) 2 ×K'…(2) however, sDA 300 / 50% Daylight self-sufficiency when vertical louvers 5 are installed ASE 1000 / 250 Daylight exposure rate with vertical louvers 5 installed α: Analysis result of the daylight self-sufficiency with only the opening and without the vertical louvers. α': Analysis result of the daylight exposure rate with only the opening and without the vertical louvers. S': Area of ​​the opening as seen through the vertical louvers when viewed from a direction perpendicular to the opening. S: Area of ​​the opening K: First correction coefficient K': Second correction coefficient That is the case.

[0030] α is the analysis result of the daylight self-sufficiency of the opening 7 only when the vertical louvers 5 are not installed (Figure 5(a)), and α' is the analysis result of the daylight exposure rate of the opening 7 only when the vertical louvers 5 are not installed. These analysis results are registered in the analysis result registration unit 11. These analysis results can generally be calculated using commercially available software.

[0031] Furthermore, as shown in the hatched area of ​​Figure 5(a), S is the area of ​​the opening 7, and as shown in the hatched area of ​​Figure 5(b), S' is the area of ​​the opening 7 excluding the vertical louvers 5 when viewed from a direction perpendicular to the opening 7. Therefore, S' / S shown in equations (1) and (2) corresponds to the opening ratio β of the vertical louvers 5.

[0032] The inventors analyzed the daylight self-sufficiency and daylight exposure rates with only the opening 7 installed, without the vertical louvers 5, and these values ​​are based on the specifications of the vertical louvers 5 (S' / S). 2 We obtained new insights indicating a proportional relationship between them.

[0033] Here, the daylight self-sufficiency and daylight exposure rates analyzed with only the opening 7 (including the state where the window glass 71 is placed) without the vertical louvers 5 are the specifications for the vertical louvers 5 (S' / S). 2 As revealed later in the inventor's analysis, there is a proportional relationship between the two.

[0034] Therefore, by simply registering the analysis results of the daylight self-supporting ratio and daylight exposure ratio for opening 7 only in the analysis result registration unit beforehand, the specifications of the vertical louvers (S' / S) can be determined. 2 By simply calculating this, the daylight self-sufficiency rate and daylight exposure rate with the vertical louvers 5 installed can be easily calculated. Furthermore, by substituting the same constant value for the first and second correction coefficients for vertical louvers 5 with different specifications, it is possible to easily grasp the trend of how the daylight self-sufficiency rate and daylight exposure rate change for each vertical louver 5. In particular, when the depth dimension x of the vertical louvers 5 in the direction toward the opening 7 is constant for multiple vertical louvers 5 with different specifications, the trend of changes in the daylight self-sufficiency rate and daylight exposure rate can be evaluated more accurately for vertical louvers 5 with different specifications.

[0035] Here, for example, it is preferable to use a value in the range of 0.9 to 1.2 as the first correction coefficient K, and a value in the range of 0.8 to 1.1 as the second correction coefficient K'. The first correction coefficient K and the second correction coefficient K' are clear from the inventor's analysis results (Tables 1 and 2) described later.

[0036] 4. Regarding the first correction coefficient calculation unit 13 and the second correction coefficient calculation unit 15 Here, as described above, by substituting constant values ​​for the first correction coefficient K and the second correction coefficient K', it is possible to easily grasp how the daylight self-sufficiency ratio and the trend of change in the daylight self-sufficiency ratio change for different specifications of vertical louvers 5 (specifically, specifications in which the thickness t of the slat members 51 and the size S of the gap between the slat members 51 are changed).

[0037] However, according to the inventor's analysis results described later, it was found that by calculating the first correction coefficient using the first correction coefficient calculation unit 13 and the second correction coefficient using the second correction coefficient calculation unit 15, the daylight self-sufficiency rate and daylight exposure rate shown in equations (1) and (2) can be calculated with greater accuracy.

[0038] The processing unit 10 includes a first correction coefficient calculation unit 13 that calculates a first correction coefficient K, and a second correction coefficient calculation unit 15 that calculates a second correction coefficient K'. More specifically, the first correction coefficient calculation unit 13 calculates the first correction coefficient using the following formula (3), and the second correction coefficient calculation unit 15 calculates the second correction coefficient using the following formula (4).

[0039] K = ax 2 +bx+c…(3) K'=a'x 2 +b'x+c'…(4) however, K: First correction coefficient K': Second correction coefficient x: Depth dimension of the vertical louvers in the direction toward the opening [mm] a: 8.8 × 10 -7 ~10.7×10 -7 Constants within the range b: 10.0 × 10 -4 ~-11.6 × 10 -4 Constants within the range c: Constants in the range of 1.18 to 1.20 a': 12.0 × 10 -7 ~17.6×10 -7 Constants within the range b': -13.2 × 10 -4 ~-17.8×10 -4 Constants within the range c': A constant in the range of 1.30 to 1.38 That is the case.

[0040] The coefficients a to c and a' to c' mentioned above were determined as follows. Specifically, for vertical louvers 5 with different depth dimensions and pitches as shown in Tables 1 and 2, the daylight self-sufficiency α and daylight exposure α' of the openings were calculated using commercially available analysis software. Furthermore, the opening ratio β (=S' / S) of the vertical louvers 5 was calculated for the vertical louvers 5 with specifications 1 to 4. Furthermore, the daylight self-sufficiency sDA of the vertical louvers 5 with specifications 1 to 4 installed was calculated using commercially available analysis software. 300 / 50% (sDA analysis value) and daylight exposure rate ASE 1000 / 250 The (ASE analysis values) and were calculated. These results are shown in Tables 1 and 2, respectively.

[0041] Next, for each specification condition 1 to 4, the daylight self-supporting factor sDA is calculated for the depth dimension x [mm]. 300 / 50% (sDA analysis value) ÷ (α × β) 2 The daylight exposure rate ASE was calculated for each specification condition 1 to 4, with respect to the depth dimension x [mm]. 1000 / 250 (ASE analysis value) ÷ (α × β) 2 The value was calculated and plotted in Figure 6(b).

[0042] Next, using these plotted values, and with depth dimension x [mm] as the variable, and the first correction coefficient K and second correction coefficient K' as y, an approximate quadratic function was formulated using the least squares method. This formulated quadratic function corresponds to equations (3) and (4) described above.

[0043] The results are shown in Figure 6(a). Next, using this quadratic approximation formula, the depth dimension x [mm] was substituted for each specification condition 1 to 4 to calculate the first correction coefficient K and the second correction coefficient K'. The results are shown in Tables 1 and 2. Furthermore, the calculated first correction coefficient K and second correction coefficient K' were substituted into equations (1) and (2) to obtain the daylight self-supporting coefficient sDA. 300 / 50% (sDA calculated value) and daylight exposure rate ASE 1000 / 250 The (ASE calculated value) was determined, and the error between it and the corresponding analytical value was calculated. These results are shown in Tables 1 and 2.

[0044] [Table 1]

[0045] [Table 2]

[0046] As is clear from Tables 1 and 2, the daylight self-sufficiency ratio sDA when the vertical louvers 5 are installed. 300 / 50% (sDA calculated value) and daylight exposure rate ASE 1000 / 250 The ASE calculated values ​​were close to the respective analysis values ​​(sDA analysis values, ASE analysis values), and there was almost no error between them. Furthermore, coefficients a~c and a'~c' were determined for three combinations of specification conditions from specification conditions 1 to 4. Of these, the combinations that produced the largest coefficients a~c and a'~c' were specification conditions 1, 2, and 4 (see Figure 6(b)). Notably, the coefficients a~c and a'~c' calculated using specification conditions 1 to 4 were the smallest of all the coefficients a~c and a'~c' calculated from these combinations.

[0047] From the results in Figures 6(a) and 6(b), if the ranges of coefficients a~c and a'~c' are within the ranges described above, the optimal first correction coefficient K and second correction coefficient K' can be calculated, and the daylight self-sufficiency sDA 300 / 50% And, daylight exposure rate ASE 1000 / 250 It can calculate and with high accuracy.

[0048] Thus, it was found that by specifying the first correction coefficient K and the second correction coefficient K' as quadratic functions with the depth dimension x of the slat member 51 of the vertical louver 5 as the variable, the daylight self-sufficiency rate and daylight exposure rate can be calculated with greater accuracy. Furthermore, the daylight self-sufficiency rate and daylight exposure rate analyzed with only the opening 7 installed, without the vertical louver 5, are (S' / S), which are the specifications of the vertical louver 5. 2 These results clearly show that a proportional relationship is assumed.

[0049] [Regarding the embodiment of the second invention] In the embodiment of the second invention, as shown in Figure 7, the evaluation system 1 evaluates the daylight self-sufficiency rate and daylight exposure rate inside the room through the opening 7 with the canopy 52 installed along the upper edge 7a of the opening 7. As shown in Figure 7, the canopy 52 extends horizontally, and the depth direction of the canopy 52 from the outside to the inside coincides with the normal direction of the window glass 71, and the canopy 52 has a depth dimension (x [mm]).

[0050] In this embodiment, similar to the embodiment of the first invention shown in Figure 3, the processing apparatus 10 comprises at least an analysis result registration unit 11, a condition setting unit 12, a first correction coefficient calculation unit 13, a daylight self-sufficiency calculation unit 14, a second correction coefficient calculation unit 15, and a daylight exposure rate calculation unit 16. Below, the explanation of points common to the embodiment of the first invention will be omitted, and the differences will be explained in detail.

[0051] The analysis result registration unit 11 has registered the analysis results for the daylight self-sufficiency rate and daylight exposure rate for the opening 7 only, without the canopy 52 (and without the vertical louvers 5 of the first embodiment of the invention). Here, multiple daylight self-sufficiency rates and daylight exposure rates for initial conditions with different sizes of the opening 7 and different sizes of the room may be registered. The condition setting unit 12 sets the depth dimension x of the canopy 52 in the direction from the outside to the inside based on the input from the input device 31.

[0052] The daylight self-sufficiency calculation unit 14 calculates the daylight self-sufficiency with the canopy 52 installed using the following formula (5A), based on the analysis results of the daylight self-sufficiency registered in the analysis result registration unit 11 and the depth dimension set in the condition setting unit 12. The daylight exposure rate calculation unit 16 calculates the daylight exposure rate with the canopy 52 installed using the following formula (6A), based on the analysis results of the daylight exposure rate registered in the analysis result registration unit 11 and the depth dimension set in the condition setting unit 12.

[0053] sDA 300 / 50% =α × K…(5A) ASE 1000 / 250 =α'×K'…(6A) however, sDA 300 / 50% Daylight self-sufficiency with canopy 52 installed ASE 1000 / 250 Daylight exposure rate with canopy 52 installed α: Analysis result of the daylight self-sufficiency when there is no awning 52 and only the opening 7. α': Analysis result of the daylight exposure rate when there is no eaves 52 and only the opening 7 is present. K: First correction coefficient K': Second correction coefficient That is the case.

[0054] The processing device 10 includes a first correction coefficient calculation unit 13 that calculates a first correction coefficient K, and a second correction coefficient calculation unit 15 that calculates a second correction coefficient K'. More specifically, the first correction coefficient calculation unit 13 calculates the first correction coefficient K using the following formula (5B), and the second correction coefficient calculation unit 15 calculates the second correction coefficient K' using the following formula (6B). Substituting formula (5B) into formula (5A) corresponds to formula (5) of the present invention, and substituting formula (6B) into formula (6A) corresponds to formula (6) of the present invention.

[0055] K = dx + e ... (5B) K'=d'x+e'…(6B) however, x: Depth dimension of the eaves in the direction from the outside to the inside [mm] d: -0.0003 (constant) e: A constant in the range of 0.995 to -0.997 d': -0.0003 (constant) e': A constant in the range of 0.990 to -0.994 That is the case.

[0056] Here, for vertical louvers 5 with different depth dimensions and pitches as shown in Tables 3 and 4, the daylight self-sufficiency α and daylight exposure α' of the opening 7 were calculated using commercially available analysis software. Furthermore, the daylight self-sufficiency sDA when the canopy 52 of specification conditions 5 to 9 is installed was calculated using commercially available analysis software. 300 / 50% (sDA analysis value) and daylight exposure rate ASE1000 / 250 The ASE analysis values ​​were calculated. These results are shown in Tables 3 and 4, respectively.

[0057] Next, for each specification condition 5-9, the daylight self-supporting factor sDA is calculated for the depth dimension x [mm]. 300 / 50% The (sDA analysis value) ÷ α was calculated and plotted in Figure 8(a). Similarly, for each specification condition 1 to 4, the daylight exposure rate ASE was calculated for the depth dimension x [mm]. 1000 / 250 The (ASE analysis value) ÷ α' was calculated, and this calculated value was plotted in Figure 8(b).

[0058] Next, using these plotted values, and with depth dimension x [mm] as the variable, and the first correction coefficient K and second correction coefficient K' as y, an approximate linear function was formulated using the least squares method. This formulated linear function corresponds to equations (5) and (6) described above.

[0059] Next, using this linear approximation formula, the depth dimension x [mm] was substituted for each specification condition 5 to 9 to calculate the first correction coefficient K and the second correction coefficient K'. The results are shown in Tables 3 and 4. Furthermore, the calculated first correction coefficient K and the second correction coefficient K' were substituted into equations (1) and (2) to obtain the daylight self-supporting coefficient sDA. 300 / 50% (sDA calculated value) and daylight exposure rate ASE 1000 / 250 The (ASE calculated value) was determined, and the error between it and the corresponding analytical value was calculated. These results are also shown in Tables 3 and 4.

[0060] [Table 3]

[0061] [Table 4]

[0062] As is clear from Tables 3 and 4, the daylight self-sufficiency sDA 300 / 50% (sDA calculated value) and daylight exposure rate ASE 1000 / 250The (ASE calculated values) showed no error for each analysis value. Furthermore, coefficients d, e, d', and e' were determined for three combinations of specification conditions 5 to 9. Of these, the combinations that yielded the largest coefficients d, e, d', and e' were specification conditions 5, 7, and 9 (see Figure 8(b)). Notably, the coefficients d, e, d', and e' calculated using all of specification conditions 5 to 9 were the smallest among all combinations.

[0063] From the results in Figures 8(a) and 8(b), if the ranges of coefficients d, e, d', and e' are within the ranges described above, the optimal first correction coefficient K and second correction coefficient K' can be calculated, and the daylight self-sufficiency sDA 300 / 50% And, daylight exposure rate ASE 1000 / 250 It can calculate and with high accuracy.

[0064] Thus, it was found that when the canopy 52 is installed, the daylight self-sufficiency rate and daylight exposure rate can be calculated with greater accuracy by specifying the first correction coefficient K and the second correction coefficient K' as linear functions with the depth dimension x of the canopy 52 as a variable.

[0065] 5. Workflow using the processing unit 10 The following describes the workflow using the processing apparatus 10 according to embodiments of the first and second inventions, with reference to Figure 9. Figure 9 is a workflow diagram using the processing apparatus according to this embodiment. First, in step S81, the daylight self-supporting rate and daylight exposure rate are calculated for the opening only (without vertical louvers 5 and without eaves 52).

[0066] Next, the process proceeds to step S82, where, as data for formulating equations (3) to (5B), commercially available analysis software is used to analyze the daylight self-sufficiency rate and daylight exposure rate when vertical louvers 5 with different dimensions and other specifications are installed in the embodiment of the first invention, and the daylight self-sufficiency rate and daylight exposure rate when eaves 52 with different depth dimensions are installed in the embodiment of the second invention. Next, the process proceeds to step S83, where approximate formulas for the first and second correction coefficients are calculated using the daylight self-sufficiency rate and daylight exposure rate analyzed in step S82. Specifically, in the embodiment of the first invention, quadratic formulas for the first and second correction coefficients are calculated with the depth dimension x [mm] of the vertical louvers 5 as the variable. In the embodiment of the second invention, linear formulas for the first and second correction coefficients are calculated with the depth dimension x [mm] of the eaves 52 as the variable.

[0067] Next, the process proceeds to step S84. In the embodiment of the first invention, conditions such as the dimensions of the vertical louver 5 to be evaluated are input to the processing device 10. The condition setting unit 12 then sets the dimensions of the slat members 51 that constitute the vertical louver 5, and the size S of the gap between adjacent slat members 51. In the embodiment of the second invention, the depth dimension x [mm] of the canopy 52 is set.

[0068] Next, proceeding to step S85, in the embodiment of the first invention, the first correction coefficient calculation unit 13 and the second correction coefficient calculation unit 15 select equations (3) and (4) for the vertical louvers 5 set in the condition setting unit 12 and calculate the first correction coefficient K and the second correction coefficient K'. In the embodiment of the second invention, the first correction coefficient calculation unit 13 and the second correction coefficient calculation unit 15 select equations (5B) and (6B) for the canopy 52 set in the condition setting unit 12 and calculate the first correction coefficient K and the second correction coefficient K'.

[0069] Next, proceeding to step S86, in the embodiment of the first invention, the daylight self-sufficiency calculation unit 14 calculates the daylight self-sufficiency based on the vertical louvers 5 set in step S84 using formula (1). The daylight exposure rate calculation unit 16 calculates the daylight exposure rate based on the vertical louvers 5 set in step S84 using formula (2). In the embodiment of the second invention, the daylight self-sufficiency calculation unit 14 calculates the daylight self-sufficiency using formula (5A). The daylight exposure rate calculation unit 16 calculates the daylight exposure rate using formula (5B).

[0070] Finally, in step S87, the processing device 10 determines whether the daylight self-supporting rate and daylight exposure rate calculated in step S86 are within a predetermined range. If they are within the predetermined range (YES), the process ends. On the other hand, if the daylight self-supporting rate and daylight exposure rate are outside the predetermined range (NO), the process proceeds to step S84. In the embodiment of the first invention, the specifications such as the dimensions of the vertical louvers to be evaluated are changed, and in the embodiment of the second invention, the depth dimension of the canopy to be evaluated is changed. The process from steps S84 to S87 is repeated until the predetermined daylight self-supporting rate and daylight exposure rate are achieved.

[0071] Although embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above, and various design modifications can be made without departing from the spirit of the invention as described in the claims. [Explanation of Symbols]

[0072] 1: Evaluation system, 7: Opening, 5: Vertical louvers, 51: Vanity members, 52: Canopy, 10: Processing device, 11: Analysis result registration unit, 12: Condition setting unit, 13: First correction coefficient calculation unit, 14: Daylight self-supporting rate calculation unit, 15: Second correction coefficient calculation unit, 16: Daylight exposure rate calculation unit

Claims

1. An evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate of a room through an opening, in which a vertical louver, having multiple slat members extending vertically and held at horizontal intervals, is installed in an opening of a building, The aforementioned daylight self-sufficiency ratio is the area ratio of the indoor region where the illuminance on the desk surface inside the room is 300 lx or more for an annual period of 50% or more of the annual daylight hours. The daylight exposure rate is the area ratio of indoor areas where the annual time spent with a desk surface illuminance of 1000 lx or more is 250 hours or more. The evaluation system includes a processing unit that calculates the daylight self-sufficiency rate and daylight exposure rate to be evaluated. The aforementioned processing apparatus is An analysis result registration unit registers the analysis results of the daylight self-supporting rate and the daylight exposure rate for the case where the vertical louvers are absent and only the opening is present, A condition setting unit for setting conditions for the dimensions of the slat members constituting the vertical louvers and the size of the spacing between adjacent slat members, A daylight self-sufficiency calculation unit calculates the daylight self-sufficiency with the vertical louvers installed using the following formula (1), based on the registered analysis results of the daylight self-sufficiency and the set conditions. A daylight exposure rate calculation unit calculates the daylight exposure rate with the vertical louvers installed using the following formula (2), based on the analysis results of the registered daylight exposure rate and the set conditions. An evaluation system for evaluating daylight self-sufficiency and daylight exposure, characterized by comprising the following features. sDA ３００／５０％ =α×(S' / S) ２ ×K…(1) ASE １０００／２５０ =α’×(S’ / S) ２ ×K’…(2) however, sDA ３００／５０％ Daylight self-sufficiency when the aforementioned vertical louvers are installed ASE １０００／２５０ : Daylight exposure rate with the aforementioned vertical louvers installed α: Analysis result of the daylight self-sufficiency with only the opening and without the vertical louvers. α': Analysis result of the daylight exposure rate with only the opening and without the vertical louvers. S': The area of ​​the opening visible through the vertical louvers when viewed from a direction perpendicular to the opening. S: Area of ​​the opening K: First correction coefficient K': Second correction coefficient That is the case.

2. The evaluation system for evaluating daylight self-sufficiency and daylight exposure rate according to claim 1, characterized in that the processing apparatus comprises a first correction coefficient calculation unit that calculates the first correction coefficient by the following formula (3), and a second correction coefficient calculation unit that calculates the second correction coefficient by the following formula (4). K=ax ２ +bx+c…(3) K’=a’x ２ +b’x+c’…(4) however, x: Depth dimension of the vertical louvers in the direction toward the opening [mm] a: a constant in the range of 8.8×10 －７ to 10.7×10 －７ ​ b: 10.0 × 10 －４ ~-11.6 x 10 －４ Constants within the range c: A constant in the range of 1.18 to 1.20 a': 12.0 × 10 －７ ~17.6 x 10 －７ Constants within the range b': -13.2×10 －４ ~-17.8 x 10 －４ Constants within the range c': A constant in the range of 1.30 to 1.38 That is the case.

3. An evaluation system for evaluating the daylight self-sufficiency rate and daylight exposure rate of a room through an opening, with an awning installed along the upper edge of the opening of a building, The aforementioned daylight self-sufficiency ratio is the area ratio of the indoor region where the illuminance on the desk surface inside the room is 300 lx or more for an annual period of 50% or more of the annual daylight hours. The daylight exposure rate is the area ratio of indoor areas where the annual time spent with a desk surface illuminance of 1000 lx or more is 250 hours or more. The evaluation system includes a processing unit that calculates the daylight self-sufficiency rate and daylight exposure rate to be evaluated. The aforementioned processing apparatus is An analysis result registration unit registers the analysis results of the daylight self-sufficiency rate and the daylight exposure rate for a case where there is no awning and only the opening, A condition setting unit for setting the depth dimension of the canopy in the direction from the outside to the inside, A daylight self-sufficiency calculation unit calculates the daylight self-sufficiency with the awning installed using the following formula (5), based on the analysis results of the registered daylight self-sufficiency and the set depth dimension. A daylight exposure rate calculation unit calculates the daylight exposure rate with the awning installed using the following formula (6), based on the analysis results of the registered daylight exposure rate and the set depth dimension. An evaluation system for evaluating daylight self-sufficiency and daylight exposure, characterized by comprising the following features. sDA ３００／５０％ =α×(dx+e)…(5) __| １０００／２５０ (α'×(='x))e')...()) however, sDA ３００／５０％ : Daylight self-sufficiency with the aforementioned canopy installed ASE １０００／２５０ : Daylight exposure rate with the aforementioned canopy installed α: Analysis result of the daylight self-sufficiency with only the opening and no awning. α': Analysis result of the daylight exposure rate with only the opening and no awning. x: Depth dimension of the eaves in the direction from the outside to the inside [mm] d: -0.0003 (constant) e: A constant in the range of 0.995 to -0.997 d': -0.0003 (constant) e': A constant in the range of 0.990 to -0.994 That is the case.

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