Method, processing device, or program

Abstract

Calculate the building's thermal load appropriately. [Solution] A method for calculating the heat load in a building having a curved member, comprising: a process of modeling the member with a plurality of elements; a process of setting a geocentric sphere for each of the plurality of elements; a process of setting the position of the sun in the corresponding geocentric sphere for each of the plurality of elements; and a process of setting two of the transmittance, reflectance, and absorptance for each of the plurality of elements based on the position of the sun in the corresponding geocentric sphere.

Description

Technical Field

[0001] The present invention relates to a method, a processing device, or a program.

Background Art

[0002] As the prior art, devices, programs, etc. for performing dynamic heat load calculations are known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When members such as glass, screens, and blinds are targets of heat load calculations, it is necessary to calculate the transmittance, reflectance, and absorptance of those members. The transmittance and reflectance can be calculated from the angle of solar radiation with respect to the member surface. Also, the absorptance can be easily obtained from the transmittance and reflectance.

[0006] Normally, since members such as glass, screens, and blinds are formed in a flat plate shape, if the solar position on the celestial sphere is determined, the incident angle of solar radiation on the member can also be calculated, and thus it is easy to calculate the transmittance and reflectance.

[0007] However, when a member with a curved surface is used in a building, it has been difficult to appropriately perform the heat load calculation of the building. [Means for solving the problem]

[0008] In view of the above issues, the present invention provides, in one aspect, a method for calculating the heat load in a building having a curved member, the method comprising: a process of modeling the member with a plurality of elements; a process of setting a geocentric sphere for each of the plurality of elements; a process of setting the position of the sun in the corresponding geocentric sphere for each of the plurality of elements; and a process of setting two of the transmittance, reflectance, and absorptance for each of the plurality of elements based on the position of the sun in the corresponding geocentric sphere.

[0009] Furthermore, in one aspect of the present invention, the present invention provides a processing device for carrying out this method and a program to be executed by the processing device. [Effects of the Invention]

[0010] According to the present invention, the thermal load of a building can be appropriately calculated. [Brief explanation of the drawing]

[0011] [Figure 1] This figure shows (a) the hardware configuration and (b) the functional configuration (software configuration) of the information processing device in the embodiment. [Figure 2] (a) A schematic diagram of the building and (b) A schematic diagram of the building model in the embodiment. [Figure 3] This diagram shows the elemental division of the building model in the embodiment. [Figure 4] This flowchart shows the processing according to the embodiment. [Figure 5] This flowchart shows the details of the calculation process for transmittance and reflectance according to the embodiment. [Figure 6] (a) An explanatory diagram showing the relationship between the sub-elements and the celestial sphere in the embodiment, and (b) The celestial sphere as viewed in the zenith direction, showing the element division of the celestial sphere. [Figure 7] This is a diagram showing a transmittance / reflectance table. [Modes for carrying out the invention]

[0012] 〔composition〕 Figure 1(a) shows the configuration of an information processing device 100 according to one embodiment of the present invention. The information processing device 100 is used for calculating the dynamic heat load of a building.

[0013] As shown in Figure 1(a), the information processing device 100 comprises a processor 101, a main memory 102, an auxiliary memory 103, an input device 104, an output device 105, and a communication device 106. These are connected to each other via communication means such as a bus (not shown).

[0014] Furthermore, the information processing device 100 does not necessarily have to be entirely implemented in hardware; all or part of its configuration may be implemented using virtual resources, such as a cloud server in a cloud system. Also, the information processing device 100 does not necessarily have to consist of a single device.

[0015] The processor 101 is composed of a CPU (Central Processing Unit), an MPU (Micro Processing Unit), and the like. The functions of the server 10 and terminal 20 are realized when the processor 101 reads and executes programs stored in the main memory 102.

[0016] The main memory device 102 is a device that stores programs and data, such as ROM (Read Only Memory), RAM (Random Access Memory), non-volatile semiconductor memory (NVRAM (Non Volatile RAM)), etc. The auxiliary storage device 103 is various non-volatile memories (NVRAM: Non-Volatile Memory) such as SSD (Solid State Drive), SD memory card, hard disk drive, optical storage device (CD (Compact Disc), DVD (Digital Versatile Disc), etc.), storage area of cloud server, etc.

[0017] The input device 104 is an interface that receives input of information, for example, keyboard, mouse, touch panel, card reader, voice input device (microphone, etc.), voice recognition device, etc. The information processing device 100 may be configured to receive input of information from other devices via the communication device 106.

[0018] The output device 105 is an interface that outputs various kinds of information, for example, screen display device (liquid crystal monitor, LCD (Liquid Crystal Display), graphic card, etc.), printing device, etc.), voice output device (speaker, etc.), voice synthesis device, etc. The information processing device 100 may be configured to output information to other devices via the communication device 106. The output device 105 corresponds to the display unit in the present invention.

[0019] The communication device 106 is a wired or wireless communication interface that realizes communication with other devices via the network 5, for example, NIC (Network Interface Card), wireless communication module, USB (Universal Serial Interface) module, serial communication module, etc.

[0020] 〔Functional Configuration〕 Figure 1(b) shows the main functional configuration of the information processing device 100. As shown in the figure, the information processing device 100 includes a storage unit 110 and a management unit 120.

[0021] The management unit 120 comprises a first management unit 121 and a second management unit 122. The first management unit 121 and the second management unit 122 are functional units that are activated by different programs.

[0022] Specific examples of programs that start the first management unit 121 include HASP and New HASP, which are programs provided by the Japan Association of Building Equipment Engineers (Non-Patent Literature 1). In this embodiment, the first management unit 121 calculates the heat acquisition of each element constituting the building and calculates the annual heat load of the building.

[0023] Unlike the first control unit 121, the second control unit 122 is a functional unit for performing detailed calculations of the elements used in thermal load calculations. For example, it is used for considering the nonlinearity of the thermal properties of the elements, detailed physical properties that cannot be considered by the first control unit 121, and / or for analyzing and calculating the transmittance and reflectance of the elements. For example, a program that performs optical measurement simulations is used for the analysis of transmittance and reflectance.

[0024] The memory unit 110 has the function of storing various data such as calculation results, correction values, analysis models, transmittance tables, and incidence tables obtained by the first management unit 121 and the second management unit 122. The first management unit 121 and the second management unit 122 can exchange calculation results, correction values, etc. with each other via the data file F stored in the memory unit 110.

[0025] Specific examples of data stored in data file F include data from the analysis model, transmittance and reflectance, input values ​​necessary for heat load calculations, correction values, and calculated values, including heat acquisition and removal weighting coefficients. Details of this data and numerical information will be described later.

[0026] [Building structure] The information processing device 100 with the above configuration is mainly used for calculating the dynamic heat load of a building B having a component G. An example of building B is shown in Figure 2(a).

[0027] Building B has a vertically extending member G installed in a location exposed to sunlight, and a room R2 partitioned by member G. Member G is not a flat plate, but a plate-shaped member with a twisted shape, as shown in Figure 2(a), and therefore its surface forms a curved surface. Note that the shape of member G in this embodiment is just an example, and member G can take any shape.

[0028] Specific examples of component G include window panes, blinds, and screens. If component G is a blind, the enveloping surface that surrounds each slat end of the blind is curved. In the case of a blind, this enveloping surface can be understood as the surface of component G.

[0029] [Processing Details] The information processing device 100 converts the building B, which has component G, into a model MB for thermal load calculation, and then performs the thermal load calculation. The processing steps from modeling to thermal load calculation are explained below using the processing flows shown in Figures 4 and 5.

[0030] In step S1, the first management unit 121 models building B as model MB and stores it in the storage unit 110. As shown in Figure 2(b), model MB comprises an element M1 corresponding to member G and a room M2 (corresponding to room R2) partitioned by element M1.

[0031] Element M1 is defined as a set of multiple elements, as shown in Figure 3. More specifically, element M1 is defined as a collection of multiple sub-elements M11. Each sub-element M11 is a rectangular planar element. In other words, the twisted shape or curved surface of member G is modeled by approximating it with multiple planes. Each sub-element M11 has a node Cn at its centroid.

[0032] In this embodiment, the sub-elements M11 are formed by dividing element M1 into a grid pattern, but they may also have other shapes such as triangles, polygons, circles, or ellipses. The number of sub-elements is set appropriately depending on the size and shape of element M1 (i.e., member G), the analysis conditions, etc. In this embodiment, as shown in Figure 3, nine sub-elements M11 are set, and as shown in Figure 7, each is assigned an identifier (ID) from 1 to 9.

[0033] In the next step S3, nine geocentric spheres M21 are set up to correspond to each of the nine sub-elements M11. In this embodiment, the nine geocentric spheres M21 are assigned the same ID as the corresponding sub-element M11 (Figure 7).

[0034] The nine geocentric spheres M21 are each hemispheres that model the sky, the Earth's surface, and the area below the Earth's surface as seen from each of the sub-elements M11. In other words, geocentric sphere M21 (ID=1) is a hemisphere that models the sky and the Earth's surface as seen from sub-element M11 (ID=1). Similarly, geocentric spheres M21 with IDs 2-8 are set as hemispheres that model the sky and the Earth's surface as seen from each of the sub-elements M11 with IDs 2-8.

[0035] Therefore, the vertex Z of each celestial sphere M21 lies on the normal passing through the node Cn of the corresponding sub-element M11, as shown in Figure 6(a). In Figure 6(a), as an example, the geocentric celestial sphere M21 with ID=1 is shown, which is set for a sub-element M11 with ID=1.

[0036] Each geocentric sphere M21 has multiple elements 1-145 divided concentrically around the apex Z, as shown in Figure 6(b). In the embodiment, each element 1-145 is formed in a circular or substantially trapezoidal shape, but the method of element division, element shape, and number of elements are set as appropriate according to the analysis conditions. The positions of the nodes and centroids of each element 1-145 are determined on the celestial sphere, for example, by a celestial coordinate system.

[0037] In step S5, the second management unit 122 creates a transmittance / reflectance table T. The transmittance / reflectance table T is a database containing transmittance and reflectance values, and as shown in Figure 7, the transmittance and reflectance values ​​corresponding to each of the elements 1-145 are stored.

[0038] In step S5, the second control unit 122 derives the transmittance and reflectance of each of the elements 1-145 by performing the following process and stores them in the transmittance / reflectance table T.

[0039] Step S5 will be described in detail using the flowchart in Figure 5. First, the second control unit 122 selects the sub-element M11 with ID=1 and its corresponding geocentric sphere M21 (ID=1) as the targets for simulation (S51). The second control unit 122 then selects element 1 and sets the sun to be located at a predetermined position on element 1 (usually the centroid) (S53).

[0040] Next, the second control unit 122 performs a light measurement simulation based on the set solar position and calculates the transmittance and reflectance at sub-element M11 (S53). Since the angle of incidence of light to sub-element M11 (ID=1) is determined based on the set solar position, the transmittance and reflectance can be calculated. The transmittance and reflectance obtained as a result of the calculation are stored in the transmittance / reflectance table T.

[0041] The second control unit 122 repeats this process for elements 2-145 (S57, S55) to calculate all the transmittance and reflectance of elements 1-145 in the sub-element M11.

[0042] After performing a simulation on sub-element M11 of ID:1, the same process is carried out on sub-elements M11 of ID:2-9 to complete the transmittance / reflectance table T (S59, S53-S57). The completed transmittance / reflectance table T is saved in data file F.

[0043] As a result of this step S5, the positions of each element of the geocentric sphere M21 and the corresponding transmittance and reflectance of each element are stored in a mutually corresponding manner, as shown in Figure 7. Note that in Figure 7, the coordinates of the element nodes are omitted, but the coordinates of the centroid are shown instead.

[0044] In step S7, the first control unit 121 performs a thermal load calculation for the model MB. At that time, it reads the transmittance / reflectance table T via the data file F and uses it for the thermal load calculation for each of the nine sub-elements M11.

[0045] Specifically, the first control unit 121, when calculating the heat load, obtains the transmittance and reflectance of each of the nine sub-elements M11 corresponding to the position of the sun at the time of analysis from the transmittance / reflectance table T.

[0046] If the coordinates of the sun at a given time are obtained, the transmittance / reflectance table T can be used to determine which element (1-145) of the Earth's celestial sphere M21 the sun is located within. By performing this determination process for all IDs (1-9) of the sub-element M11, the transmittance and reflectance for all nine sub-elements M11 can be obtained.

[0047] The first control unit 121 calculates the heat load in element M1 (i.e., nine sub-elements M11) and room M2 based on the acquired transmittance and reflectance, as well as the physical properties of member G (such as thermal transmittance).

[0048] The first management unit 121 executes the above calculation at each time point within the set period, thereby performing the heat load calculation for building B via model MB.

[0049] [Variation] The above describes an embodiment in which the transmittance and reflectance of the sub-element M11 are calculated and used in the thermal load calculation, but the absorptance may also be calculated. Since the sum of transmittance, absorptance, and reflectance is 100%, it is sufficient to calculate two of the transmittance, reflectance, and absorptance. Alternatively, only one of the transmittance, reflectance, and absorptance may be obtained using the method of the above embodiment, and the remaining two physical properties may be obtained by a different calculation method.

[0050] In the above example, the celestial sphere M21 was formed as a hemisphere, but the portion below the surface may be omitted. For example, when member G is facing south, a dividing line connecting north and south may be provided to divide the celestial sphere M21, and simulations for calculating transmittance and reflectance may be performed only on the eastern (or western) side. Since the angle of incidence around the time of meridian noon is symmetrical between east and west, the calculation results from sunrise to meridian noon (or meridian noon to sunset) performed on the eastern (or western) side can be used for meridian noon to sunset (or sunrise to meridian noon).

[0051] 〔effect〕 The embodiments and modifications described above disclose the following aspects.

[0052] (Aspect 1) The management unit 120 performs a method for calculating the heat load in a building having a curved member, the method including: a process of modeling the member G with a plurality of sub-elements M11 (S1); a process of setting a geocentric sphere M21 for each of the plurality of sub-elements M11 (S3); a process of setting the position of the sun in the corresponding geocentric sphere M21 for each of the sub-elements M11 (S55); and a process of setting at least one of transmittance, reflectance, and absorptiveness for each of the sub-elements M11 based on the position of the sun in the corresponding geocentric sphere M21 (S57).

[0053] As described above, by performing the calculation process as described, accurate transmittance, reflectance, and absorptance can be calculated even when member G has a curved surface. Therefore, the heat load calculation using model MB is performed appropriately, and the heat load in building B can be appropriately simulated.

[0054] (Aspect 2) In the method of aspect 1, the geocentric sphere M21 is formed in a hemispherical shape, and the apex Z of the geocentric sphere M21 is located in the direction normal to the corresponding sub-element M11.

[0055] By setting the geocentric sphere as described above, it is possible to cover all possible solar positions for the sub-element M11. Furthermore, since the geocentric sphere can be formed as a hemisphere rather than a whole globe, the computational load on processing equipment can be reduced.

[0056] (Aspect 3) In any of the methods of aspects 1 to 2, the geocentric sphere M21 is divided into elements in a concentric manner around the apex Z of the geocentric sphere M21, and comprises a plurality of elements 1-145. The position of the sun is set at one location for each element 1-145.

[0057] By dividing the elements as described above, the position of the sun can be evenly and discretely set on the M21 celestial sphere. This allows for the calculation of transmittance, reflectance, and absorptance while reducing the computational load and maintaining a certain level of calculation accuracy.

[0058] (Aspects 4 and 5) The above embodiments present an information processing device 100 that implements any of the methods in aspects 1 to 3, and a program to be executed by the information processing device 100. [Explanation of symbols]

[0059] Element M1, small element M11, earth sphere M21 Building B, room R2 Model MB, Room M2 Information processing device 100

Claims

1. A method for calculating the heat load in a building having curved members, A process for modeling the aforementioned member with multiple elements, For each of the aforementioned multiple elements, a process to set the Earth-Celestial Sphere, For each of the aforementioned multiple elements, a process is performed to set the position of the sun on the corresponding celestial sphere. A process for setting at least one of the transmittance, reflectance, and absorptance for each of the aforementioned plurality of elements, based on the position of the sun in the corresponding celestial sphere. A method that includes this.

2. The aforementioned celestial sphere is formed in a hemispherical shape, and the apex of the celestial sphere is located in the direction of the normal to the corresponding element. The method according to claim 1.

3. The aforementioned celestial sphere comprises a plurality of point-sphere elements formed by dividing the celestial sphere surface into elements in a concentric circular pattern around the apex, The aforementioned solar position is set at one location for each element of the Earth-Celestial Sphere. The method according to claim 1.

4. A processing apparatus that performs the method according to any one of claims 1 to 3.

5. A program that causes a processing device to execute the method described in any one of claims 1 to 3.

Images