KR101471603B1 - Apparatus and method for performing energy analysis using IFC file - Google Patents

Abstract

The present invention provides a method and apparatus for performing energy analysis of a building by extracting shape and location information of objects belonging to a space and a space of a building included in an IFC (Industry Foundation Classes) file, which is an international standard file format.
A building energy analysis method using an IFC file according to the present invention comprises the steps of: recognizing a spatial entity of a building to be analyzed from an IFC file and extracting shape and position information of the space; The method comprising the steps of: recognizing an entity and extracting shape and location information of each object; converting shape and location information of the extracted space and object entity into data required for energy analysis of the building; Generating an input file necessary for energy analysis of the building by mapping according to a predetermined file format; and calculating a maximum energy load of the building using the input file and outputting a calculation result value.

Description

[0001] Apparatus and method for energy analysis using IFC file [

The present invention relates to a method and an apparatus for performing energy analysis of a building using an IFC (Industry Foundation Classes) file, which is an international standard file format. More particularly, the present invention relates to a method and an apparatus for analyzing energy of a building Shape, and location information of a building to perform energy analysis of the building.

The present invention is the result of the research project of the joint research and development project (No. 00043726) supported by the Small and Medium Business Administration in 2010.

Interest in reducing the energy consumption of buildings has already increased rapidly throughout the world. As a result, in order to reduce the estimated energy consumption of buildings by 15% in 2020, the Ministry of Construction and Transportation has strengthened the energy saving design standards in 2005 and introduced an eco-friendly building certification system. .

Building Information Modeling (BIM) programs are widely used in building design for improving expressiveness of unstructured design and improving efficiency through integrated information management at the design stage. In Korea, for building energy simulation The use of BIM is being systematically prepared.

However, in the BIM-based 3D CAD (Computer Aided Design) application, it is impossible to directly use the shape and location information of the building created in the IFC file format to generate the input file of the energy analysis engine. Currently, the IFC file is converted into the gbXML file There is a problem that it must be converted into an input file for calculating the energy load later.

Korean Patent Laid-Open No. 10-2012-16158

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for directly generating an input file necessary for energy analysis of a building from an IFC file to perform energy analysis.

An apparatus for analyzing building energy using an IFC file according to an aspect of the present invention recognizes one or more objects belonging to the space and the space to be analyzed from the IFC file and extracts shape and position information associated with the space and the object An IFC file analysis unit, a data conversion unit for converting shape and location information of the extracted space and object into data required for energy analysis of the building, and a mapping unit for mapping the converted data according to a predetermined file format, An input file generation unit for generating an input file necessary for energy analysis of a building, and an energy analysis unit for calculating a maximum energy load of the building using the input file and outputting a calculation result value.

A method for analyzing a building energy using an IFC file according to an aspect of the present invention includes the steps of: recognizing a spatial entity of a building to be analyzed from an IFC file and extracting shape and position information of the space; Recognizing at least one object entity and extracting shape and position information of each object; converting shape and position information of the extracted space and object entity into data required in energy analysis of the building; A step of generating an input file necessary for energy analysis of the building by mapping the data according to a predetermined file format, and calculating the maximum energy load of the building using the input file and outputting a calculation result value do.

According to the present invention, an input file necessary for energy analysis of a building can be directly generated by using shape information of a building included in an IFC file, so that the efficiency of the energy analysis process can be improved and the reliability of the analysis result can be improved.

1 is a diagram showing a configuration of an energy analysis apparatus 100 according to an embodiment of the present invention
Fig. 2 shows a schema showing the relationship between the objects included in the space and the space included in the IFC file.
3 is a flowchart illustrating an energy analysis method according to an embodiment of the present invention.
4 is a flowchart illustrating detailed steps of a spatial recognition and extraction process according to an embodiment of the present invention.
Figure 5 shows an IfcSpace entity schema included in an IFC file.
6 is a flowchart illustrating detailed steps of an object recognition and extraction process according to an embodiment of the present invention.
7 (a) to (c) show the type-specific entity schemas of the objects included in the IFC file.
FIG. 8 is a flowchart illustrating a data conversion process according to an exemplary embodiment of the present invention.
9 is a flowchart illustrating a detailed process of generating an energy analysis input file according to an embodiment of the present invention.
10 illustrates an exemplary input file template according to an embodiment of the present invention.
11 (a) and 11 (b) show an example of modeling an example building for IFC file generation.
FIG. 12 shows an example of generating an INP file, which is an input file required for energy analysis, from an IFC file of an example building according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but includes modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms "part,"" module, "and the like in the description mean units for processing at least one function or operation, and may be implemented by one or more hardware or software or a combination of hardware and software. .

1 is a diagram showing the configuration of an energy analysis apparatus 100 according to an embodiment of the present invention. 1, the energy analysis apparatus 100 includes an IFC file analysis unit 110, a data conversion unit 120, an input file generation unit 130, an energy analysis unit 140, 150).

The IFC file analysis unit 110 recognizes one or more objects belonging to the space and space of the analysis target building included in the IFC file, extracts shape and position information associated with each object, and stores the extracted shape and position information in the object-based database 150 . In one embodiment, the object may comprise at least one of a wall, a slab, and a window.

Fig. 2 shows a schema showing the relationship between the objects included in the space and the space included in the IFC file. As shown, the information of the space boundary (IfcRespaceBoundary) entity 200 can be utilized to recognize objects belonging to the space and space of the building. The IfcRelSpaceBoundary entity 200 defines the relationship between the space (IfcSpace) entity 210 representing the space of the building and the object (IfcElement) entity 220 belonging to the space. The IfcRelSpaceBoundary entity 200 can extract the space identifier from the RelationSpace relationship entity 210 and extract the identifier of the object constituting the space from the object (IfcElement) entity 220 referenced by the RelatedBuildingElement property can do. The object IfcElement 220 may be represented by an IfcWall entity 230 representing a wall according to the object type, an IfcSlab entity 240 representing a slab, an IfcDoor entity 250 / IfcWindow entity 260 representing a window, and the like.

The IFC file analysis unit 110 recognizes at least one or more objects belonging to the space and space of the building from the IFC file based on the IFC file schema and extracts the shape and position information associated with the space and the object.

In one embodiment, the space includes shape information and a height value of the space expressed in a plan view as the shape information, and may include positional information of the space and position coordinate values based on the X, Y, and Z axes.

In one embodiment, one or more objects belonging to a space may comprise at least one of a wall, a slab, and a window. If the object is a wall, the shape and position information of the object extracted may include the length, height, direction information, and position coordinate of the object. The shape and location information of the object extracted when the object is a slab may include the shape, height, direction information, and position coordinate of the object. If the object is a window, the shape and location information of the extracted object may include the length, height, and position coordinate values of the object.

The data conversion unit 120 converts the position and shape information extracted for each object belonging to the space and the space by the IFC file analysis unit 110 into data required by the energy analysis engine and stores the converted position and shape information in the object based database 150 do.

The input file generation unit 130 generates an input file necessary for energy analysis by mapping the data converted by the data conversion unit 120 according to a predetermined input file format. In one embodiment, the energy analysis apparatus 100 uses the DOE-2 engine, which is the most widely used energy analysis engine currently used. The DOE-2 engine is designed to study energy performance in the design phase, an engine used in simulation of heating and cooling load analysis that has been widely used around the world for 25 years at Lawrence Berkeley National Laboratory and James J. Hirsch & Associates. The input file format required by the DOE-2 engine is the INP file. Specifically, the information required in the INP file is shown in the following table. The building model is recognized as a space that is the basis of energy analysis. Each space includes area and volume information, and is a location that indicates the distance from the reference point of the building in the direction of X axis, Y axis, Z axis Coordinate values and an azimuth angle indicating the direction of the space with respect to the Y-axis. In addition, the object (wall, slab, window, etc.) forming the space is classified by the space. At this time, the wall / slab object should include a width, a height, an azimuth and a position coordinate value, and a window object should include a length, a height, and a position coordinate value.

division INP requirement information Contents Space area area Volume volume Azimuth Azimuth angle X Position coordinates Y Z Object
(Envelope) Wall / slab
(Wall / slab)




Height Height Width Length Azimuth Azimuth angle X Position coordinates Y Z Door & Window
(Window) Height Height Width Length X Position coordinates Y

Referring again to FIG. 1, the energy analysis unit 140 calculates the maximum energy load of the building using the input file generated by the input file generation unit 130, and outputs the calculation result value. As described above, in one embodiment, the energy analysis can be performed using the currently most widely used DOE-2 analysis engine.

The object-based database 150 stores shape and position information of the space and the object extracted by the IFC file analysis unit 110, data converted by the data conversion unit 120, data generated by the input file generation unit 130 And an analysis result of the input file and the energy analysis unit 140. [0034] FIG.

On the other hand, although not specifically shown in the drawings, the above-described energy analysis apparatus 100 can be implemented as one or more hardware and / or programs on a general-purpose computing system or a dedicated computing system having a processor and a memory.

3 is a flowchart illustrating an energy analysis method according to an embodiment of the present invention. In step 310, the space (IfcSpace) entity included in the IFC file of the building to be analyzed is recognized, and the shape and position information of the space are extracted and stored in the object-based database. In one embodiment, after retrieving an IfcSpace entity from an IFC file, extracting an identifier of the corresponding spatial entity, storing the extracted identifier in the object-based database, and extracting the identifier of the space from the attribute information referred to by the corresponding spatial entity Height information, direction information, and position coordinates of the space as shape and position information, and stores the information in the object-based database.

In operation 320, one or more objects belonging to the recognized space are recognized, and shape and position information of each object is extracted and stored in an object-based database. In one embodiment, an IFC file entity is searched for an entity of an IFCRelSpaceBoundary referring to the extracted space identifier in step 310, and one or more object identifiers belonging to the space are recognized from attribute information of the corresponding spatial boundary entity . Next, the object entity corresponding to the object identifier is searched, and the shape information and the position information of the object can be extracted from the attribute information referred to by the searched object entity.

In step 330, the shape and position information of the space and object extracted in the processes 310 and 320 are converted into data required by the energy analysis engine and stored in the object-based database.

In operation 340, the converted data is mapped according to an input file format required by the energy analysis engine to generate an input file necessary for energy analysis.

In operation 350, the maximum energy load of the building is calculated based on the generated input file, and a result value is output. In one embodiment, the maximum energy load per time for all the spaces included in the building can be summed up to calculate the maximum load for each building by time, and the calculation result can be arranged in a table for the user.

Hereinafter, the main process of FIG. 3 will be described in detail with reference to FIGS. 4 to 10. FIG.

FIG. 4 shows detailed steps of a spatial recognition and extraction process according to an embodiment of the present invention, and FIG. 5 shows a schema of an IfcSpace entity included in an IFC file.

As shown in FIG. 4, in step 410, it is determined whether or not there is a space (IfcSpace) entity in the corresponding IFC file, and an identifier (ID) of the corresponding IfcSpace entity is extracted and stored in the object based database.

In step 420, the shape information included in the IfcPolyline entity referenced by the SweptArea attribute of the IfcExtrudedAreaSolid entity referenced to represent the shape of the space in the IfcSpace entity is extracted and stored in the object-based database. The shape information indicates a shape expressed in a plan view of a space or an object, and area information of a space necessary for energy analysis can be calculated based on the shape information.

In step 430, direction information and position coordinates expressed by X, Y, Z axis coordinates (axis coordinates) contained in the IfcAxis2Placement3D entity referenced to indicate the position of the space in the IfcSpace entity are extracted and stored in the object-based database . In one example, the X, Y, and Z axis coordinates are referenced to the axis attribute of the IfcAxis2Placement3D entity, and the position coordinates are referenced to the location attribute of the IfcAxis2Placement3D entity.

In step 440, the Height value is extracted from the Depth attribute of the IfcExtrudedAreaSolid entity referenced to extract the height value of the space from the IfcSpace entity and stored in the object based database. The height information can be used to calculate the volume of space required for energy analysis.

In step 450, it is determined whether another IfcSpace entity exists, and if another IfcSpace entity is found, steps 410 to 440 described above are repeated.

As shown in FIG. 5, IfcSpace representing the space is a space defined by the depth attribute in the IfcExtrudedAreaSolid entity referenced by the representation attribute. Can be extracted. In addition, the shape of the corresponding space can be extracted by the coordinates contained in the IfcPolyline entity referenced by the SweptArea attribute.

On the other hand, the IfcLocalPlacement entity is referred to as the ObjectPlacement attribute as the location information of the space. It again references the IfcAxis2 Placement3D entity with the RelativePlacement attribute, which refers to the IfcCartesianPoint entity referenced by the Location property. And the IfcCartesianPoint entity contains an IfcLengthMeasure referenced by the Coordinates attribute, which contains the specific coordinates. There are three kinds of coordinates. The coordinate with the first indicated IfcLengthMeasure Exp: pos = "0" corresponds to the X value among the position coordinates of the corresponding space. Next, the second one with Exp: pos = "1" is the Y value which means the distance in the Y axis direction, and the third one with Exp: pos = "3" is the Z value corresponding to the height.

FIG. 6 is a flowchart illustrating sub-steps of an object recognition and extraction process according to an embodiment of the present invention. FIGS. 7A to 7C illustrate entity schemes according to types of objects included in an IFC file.

In step 602, the spatial identifier stored in the object-based database is recognized.

In step 604, an entity of IfcRelSpaceBoundary that references the space identifier is retrieved from the IFC file.

In step 606, the identifier of the object referenced by the RelatedBuildingElement attribute is recognized in the retrieved IfcRelSpaceBoundary entity.

In step 608, an object corresponding to the recognized object identifier is retrieved from the IFC file.

In step 610, the type of the retrieved object is determined and the type information of the object is stored in the object-based database. In one embodiment, the type of configuration object is a wall or slab.

In step 612, shape information and position information of the object are extracted from the IFC file and stored in the object-based database. In one embodiment, when the object is a wall, it includes length information and height information of the wall as shape information, and may include direction information and position coordinate values of the object in the three-dimensional space as the position information. If the object is a slab, the slab shape and the height information may be included as the shape information, and the direction information and the position coordinate value may be included as the position information.

In step 614, it is determined whether a window object is included in the object. To do this, it looks for an IfcRelVoidsElement entity that references the object's identifier. If the IfcRelVoidsElement entity is present, it means that the object contains a window object. Otherwise, the window object is not included, so the information extraction process for the object is completed.

On the other hand, if the object includes the window object, the referenced window object is searched for in the IfcRelVoidsElement entity (step 616), and the shape and position information for the window object is extracted from the IFC file and stored in the object-based database (Step 618) and completes the information extraction process for the object. In one embodiment, the window object includes length and height information as shape information and includes position coordinates as position information.

7A shows a schema of a wall entity included in an IFC file. As shown, the location information of the wall is expressed in X, Y, Z coordinates included in the IfcCartesianPoint entity. The direction (azimuth) information is represented by coordinates in the direction of the object in the three-dimensional space by using the IfcShapeRepresentati on Representation relation on exp: pos = "1" by utilizing the RelationContext IfcDirection entity from the IfcGeometricRepresentationContext entity to the worldcordinate relation IfcAxis2Placement3D entity with ContextOfItems relationship. . For example, the object in the X axis direction has (1, 0, 0) and the object in the Y axis direction has (0, 1, 0) coordinate information. The width information indicating the length of the wall represents the center line created when the wall is modeled in the 3D CAD program. IfcShapeRepresentati, which is a Representation relation of IfcWall, can extract the value from IfcLengthMeasureexp: pos = "1" among the coordinates constituting IfcPolyline which is Items relation from exp: pos = "0". On the other hand, the height of the wall can be extracted from the Depth value of IfcExtrudedAreaSolid, which is the second information of the Representation relation of IfcWall. Here, IfcAxis2Placement3D, which is the position relation of the IfcExtrudedAreaSolid entity, contains information about a coordinate axis that forms a shape for the wall. The Axis of the IfcAxis2Placement3D entity defines the Z axis on which the shape is created, and the RefDirection defines the X axis. The extrudeddirection defines the direction in which the shape is expanded.

FIG. 7B shows the schema of an IfcDoor / IfcWindow entity included in the IFC file. As shown, the IfcDoor / IfcWindow entity is represented directly by the Overallwidth and Overallheight attributes, and the values can be extracted to confirm the window length and height information. The location information is also included as an entity structure composed of object placement relationships like other objects, and the corresponding location coordinates can be extracted.

7C shows the schema of the IfcSlab entity included in the IFC file. As shown, the IfcSlab entity can confirm with the PredefinedType whether the object is a floor or a roof. In addition, location information is included in relation to ObjectPlacement in the same way as IfcWall, and the position coordinates of the slab can be extracted from the IfcCartesianPoint entity. Also, from the IfcSlab entity, an entity of IfcExtrudedAreaSolid in the Items relationship is referenced from the Representation relationship IfcShapeRepresentation exp: pos = "0". Here you can extract the coordinate information of the polygon that represents the shape from the SweptArea relationship IfcPolyline entity. Also, ifcShapeReprentation exp: pos = "0", the direction information can be extracted from the IfcGeometricRepresentationContext, which is a ContextOfItems relation, to the coordinates included in the WorldCoordinate System relation IfcAxis2Placement3D and the RefDirection relation IfcDirection.

FIG. 8 is a flowchart illustrating a data conversion process according to an exemplary embodiment of the present invention.

In step 810, the shape information extracted for one or more objects belonging to the space and the space of the building to be analyzed is converted into a polygon coordinate value required for energy analysis and stored in the object-based database.

In step 820, spatial and object orientation information is converted to the azimuth values required for energy analysis and stored in the object-based database.

In step 830, the format of the height value extracted from the depth attribute of the space and the object is converted into the height value of the format required in the INP file and is stored in the object-based database.

In step 840, the position coordinates of the object are converted into the X, Y, Z values of the format required by the INP file and stored in the object-based database.

In step 850, a position coordinate value of the window object is generated. In one embodiment, the value obtained by dividing the OverallWidth value of the window by 2 is subtracted from the X-axis value of the window reference point coordinates, and then the X and Y values of the reference point position coordinates of the related wall are subtracted again, Relative position coordinates can be calculated.

In step 860, the unit of shape and position information is converted from mm to ft.

9 is a flowchart illustrating a detailed process of generating an energy analysis input file according to an embodiment of the present invention.

In step 910, the input file format of the energy analysis is recognized as a template. An input file template according to an embodiment of the present invention is illustrated by way of example in FIG.

In step 920, the transformed data is read from the object-based database and the location and shape information of the object to be analyzed and is mapped to the recognized template to generate an input file necessary for energy analysis. In step 930, And outputs the generated input file. The input file generated in one example can be stored in an object-based database.

In step 940, it is determined whether there is an error in the generated input file by using a BDL (Processor Description Code) processor. If an error is found, a history of the error found by the user and an input file are output, (Step 950).

If no errors are found, an input file for energy analysis is stored in the object-based database (step 960).

11 (a) and 11 (b) show an example of modeling an example building for IFC file generation. 11 (a) shows a result of modeling using a software product ArchiCAD v.14 of Graphisoft, and Fig. 11 (b) shows a result of modeling using a software product eQUEST The results are modeled using v3.64. As shown in the figure, the example building is composed of four walls named 'Front-1', 'Right-1', 'Back-1' and 'Left-1' and a floor named 'Floor-1' The height of the wall is 2.8m and the length of the wall is 10m on the long side and 5m on the short side. At the center of the 'Front-1' and 'back-1' walls is a 1.5m high, 2m wide window with a 2.1m high and 0.9m wide door at the center of the Right-1 wall. The floor is 80 mm thick, and the floor area is equal to the space area. In this example, the whole building is composed of one space, the space area is 50 square meters, and the volume is 140 square meters.

Table 2 shows the recognition results of the objects belonging to the space and the space of the example building from the IFC file calculated by the modeling result of the example building. As shown in Table 2, since the example building is composed of one space, one IfcSpace having the identifier "i5842" is recognized, and the space is divided into one IfcSlab, four IfcWallStandardcase, IfcDoor, two IfcWindow Object is associated with the object.

Related Entities Object name IfcSpace
"I5842" IfcSlab "i17051" 'Floor-1' IfcSlab "i17062" 'Top-1' IfcWallStandardcase "i1681" 'Front-1' IfcWallStandardcase "i7528" 'Back-1' IfcWallStandardcase "i12334" 'Right-1' IfcWallStandardcase "i16758" 'Left-1' IfcDoor "i9879" 'Door-1' IfcWindow "i3246" 'Window-1' IfcWindow "i12518" 'Window-2'

Table 3 below shows the shape and position information for each entity extracted from the IFC file of the example building and the converted values thereof.

division Included information Contents Conversion value IfcSpace i5842 shape polygon Corresponding coordinates height 2,800 9.186ft azimuth 0 0 X 0.0 0 ft Y 0.0 0 ft Z 0.0 0 ft IfcWall i1681 height 2,800 9.186 ft width 10,000 32,808 ft azimuth 180  180 X 0.0 0 ft Y 0.0 0 ft Z 0.0 0 ft IfcWall i7528 height 2,800 9.186 ft width 5,000 16.404 ft azimuth 90 90 X 10,000 32,808 ft Y 0.0 0 ft Z 0.0 0 ft IfcWall i12334 height 2,800 9.186 ft width 10,000 32,808 ft azimuth 0 0 X 10,000 32,808 ft Y 5,000 16.404 ft Z 0 0 ft IfcWall i16758 height 2,800 9.186 ft width 5,000 16.404 ft azimuth 270 270 X 0.0 0 ft Y 5,000 16.404 ft Z 0.0 0 ft IfcSlab i17062 height 5,000 16.404 ft width 10,000 32,808 ft azimuth 180 180 X 0.0 0 ft Y 5,000 16.404 ft Z 0.0 0 ft IfcDoor i9879 height 2,100 6.89 ft width 900 2.953 ft X 2,050 6.726 ft Y 0.0 0 ft IfcWindow i3246 height 1,500 4.921 ft width 2,000 6.562 ft X 4,000 13.123 ft Y 900 2.953 ft IfcWindow i12518 height 1,500 4.921 ft width 2,000 6.562 ft X 4,000 13.123 ft Y 900 2.953 ft

FIG. 12 shows an example of generating an INP file, which is an input file required for energy analysis, from an IFC file of an example building according to the present invention. Since the space used in the example is located at (0, 0, 0) on a building basis, the X, Y, and Z values all have a value of zero. In addition, each object includes height, width, direction information, and coordinate values for the X, Y, and Z axes according to the position. Here, the coordinate value of the wall represents a value for each axis with the first coordinate point forming the shape of the space to which it belongs as a reference point. You can also find information about two windows named 'Window-1', 'Window-2' and one door named 'Door-1'.

Table 4 shows the analysis results of the INP file generated according to the present invention and the INP file generated through the eQUEST software through the DOE-2 analysis engine. Specifically, it compares 'Report-LV-N Building Coordinate Geometry', which can recognize the shape information of the building, from the SIM file which is an output file calculated from the energy analysis of the example building. As can be seen from Table 4, except for the decimal point error occurring when converting the mm unit into ft units in the input file creation process, the shape information of the input file generated according to the present invention and the input file generated by eQUEST Are all the same.

File classification The shape information included in the analysis result INP written with development technology

INP written in eQUEST

The embodiments of the present invention have been described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: Energy analyzer
110: IFC file analysis unit
120: Data conversion unit
130: Input file generation unit
140: Energy Analysis Department
150: Object-based database

Claims (19)

As a building energy analysis device using IFC file,
An IFC file analyzing unit for recognizing one or more objects belonging to the space and the space to be analyzed from the IFC file and extracting shape and position information associated with the space and the object;
A data converter for converting shape and location information of the extracted space and object into data required for energy analysis of the building;
An input file generation unit for mapping the converted data according to a predetermined file format to generate an input file necessary for energy analysis of the building;
And an energy analysis unit for calculating an energy maximum load of the building using the input file and outputting a calculation result value,
Wherein the shape and position information of the extracted space includes shape information indicating a shape in which the space is expressed in a plane, a height value of the space, direction information, and position coordinates.
2. The apparatus of claim 1, further comprising: an object-based database for storing at least one of shape and position information of the space and object extracted by the IFC file analysis unit, the converted data, the input file, Building energy analysis system using IFC file which further includes.
delete The apparatus of claim 1, wherein the at least one object belonging to the space comprises at least one of a wall, a slab, and a window.
5. The apparatus of claim 4, wherein the shape and position information of the extracted object include the length, height, direction information, and position coordinate values of the object when the object is a wall.
5. The apparatus of claim 4, wherein the shape and position information of the extracted object include shape, height, direction information, and position coordinate values of the object when the object is a slab.
The apparatus as claimed in claim 4, wherein the shape and position information of the extracted object include a length, height, and position coordinate values of the object when the object is a window.
The apparatus of claim 1, wherein the selected file format is an INP file format.
The apparatus of claim 1, wherein the energy analysis unit uses an IFC file to calculate a maximum energy load of the building using a DOE-2 analysis engine.
Recognizing a spatial entity of a building to be analyzed from an IFC file and extracting shape and position information of the space;
Recognizing one or more object entities belonging to the recognized spatial entity and extracting shape and position information of each object;
Converting the shape and location information of the extracted space and object entity into data required for energy analysis of the building;
Generating an input file necessary for energy analysis of the building by mapping the converted data according to a predetermined file format;
Calculating a maximum energy load of the building using the input file, and outputting a calculation result value,
Wherein recognizing one or more object entities belonging to the recognized spatial entity and extracting shape and position information of each object comprises:
Retrieving a space identifier in an object-based database;
Searching an IFC file for a space boundary (IfcRelSpaceBoundary) entity referencing the space identifier;
Recognizing one or more object identifiers belonging to the space from the retrieved attribute information of the spatial boundary entity and searching for an object entity corresponding to the recognized object identifier;
And extracting shape information and position information of the searched object and storing the extracted shape information and position information in an object-based database.
The method as claimed in claim 10, wherein the step of recognizing the spatial entity of the building to be analyzed from the IFC file and extracting the shape and position information of the space comprises:
Retrieving a space (IfcSpace) entity from the IFC file, extracting an identifier of the retrieved space entity, and storing it in an object-based database;
Extracting shape information, height, direction information, and position coordinates of the space from the attribute information referred to by the spatial entity for each of the recognized spatial entities and storing the extracted information in the object-based database
A method for analyzing building energy using an IFC file.
delete The building energy analysis method according to claim 10, wherein when the object is a wall, the building energy analysis method using an IFC file that extracts the length, height, direction information, and position coordinate value of the object from the property information referred to by the object, .
The method according to claim 10, further comprising the steps of: analyzing a building energy analysis using an IFC file that extracts the shape, height, direction information, and position coordinate values of the object from the attribute information referred to by the object when the object is a slab, Way.
11. The method according to claim 10, wherein the length, height, and position coordinate values of the object are extracted from the attribute information referred to by the object when the object is a window, using the IFC file.
11. The method of claim 10, wherein the converting the shape and position information of the extracted space and object entity into data required for energy analysis of the building comprises: converting an IFC file that converts the shape information of the object into a polygon coordinate value Energy analysis method of building.
The method as claimed in claim 10, wherein the step of converting the shape and position information of the extracted space and object entity into data required for energy analysis of the building comprises the steps of: constructing a building using an IFC file for converting the direction information of the space and the object into an azimuth angle value Energy analysis method.
The method as claimed in claim 10, wherein the step of converting the shape and position information of the extracted space and object entity into data required for energy analysis of the building includes: converting an IFC file converting the unit of shape and position information from mm to ft Energy analysis method of building.
The method as claimed in claim 10, wherein the step of generating an input file necessary for analyzing energy of the building further includes the step of outputting a history of the error and an input file to the user to correct the error if an error is found in the input file A method of building energy analysis using IFC file.

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