Interoperability: Getting Building Geometry from CAD

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The use of energy simulation tools has historically been hampered by the difficulty involved in gathering and accurately entering the myriad building descrīption data required for simulation. The International Alliance for Interoperability (IAI) is developing a common data model for the exchange of data between software applications for the Architectural/Engineering/Construction and Facilities Maintenance Industry (AEC/FM). This data model is called Industry Foundation Classes (IFC). Software that implements the IFC data model can easily share input and output data that is stored in IFC data files.
[C W)uc'A+H0能源模拟工具的应用，由于需要收集和准确输入海量的模拟用的建筑描述数据，在（自身）历史的发展中遇到阻碍。国际通用性联盟（IAI）正在开发一个用于在建筑/工程/结构和设备维护(AEC/FM)产业的软件应用之间进行数据交换的通用数据模型。这个数据模型被称作Industry Foundation Classes (IFC)。实行IFC数据模型的软件可以很容易的共享储存在IFC数据文件中的输入和输出数据。

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For more information on IFC-compliant software tools visit the IAI Implementation Support Group website. To check on the status and availability of specific IFC-compliant software tools see the International Overview of IFC-Implementation Activities.绿色建筑博客 H+CJ*W2e
想了解更多满足IFC的软件工具请访问IAI执行支持小组的网页。想查看特殊IFC软件工具的状况和有用性，请看国际IFC执行活动总览的网页。绿色建筑博客j:dCY'E4H@|qI o
EnergyPlus Interoperability with CADE+与CAD的通用性

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Several popular CAD tools now have implementations of IFC-compliant import/export capabilities that allow the geometry created in these tools to be written to, and read from, IFC data files. Commercially available versions of these tools will likely be based on different released versions of the IFC data model, including R1.5.1, R2.0, and the 2x Platform. A software development middleware tool called BSPro COM-Server by Olof Granlund Oy (seehttp://www.bspro.net/)provides access to IFC data files based on all of these release versions, and is tailored to the Building Services sector of the AEC/FM Industry.
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{.aBQ^0许多流行的CAD工具现在支持IFC执行的输入/输出能力，允许在这些工具中创造几何构型以写入IFC数据或读出IFC数据。商业上，这些工具的有效版本可能基于不同版本的IFC数据模型，包括：R1.5.1, R2.0和 the 2x Platform.。一个软件开发的中间体工具，被Olof Granlund Oy称作BSPro COM-Server（见http://www.bspro.net/），提供基于所有这些释放版本的IFC数据文件的进入权限，并且适应AEC/FM工业的Building Services部分。绿色建筑博客0| RG3wH5?

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LBNL developed client software module based on the BSPro COM-Server that automatically acquires the geometry of spaces, walls, windows, doors, floors, and roofs from an IFC data file, and generates an EnergyPlus input data file (IDF) containing this building geometry. The EnergyPlus client to the BSPro COM-Server, referred to as the IFCtoIDF utility. The current version of the IFCtoIDF utility is compatible with EnergyPlus Version 1.2.2 and can be downloaded separately (EXE 1.4 MB).绿色建筑博客oxUC2?1y-Z
LBNL开发的基于BSPro COM-Server的客户程序模块，它可以从IFC数据文件自动提取出空间、墙体、窗体、门、地板和屋顶的几何信息，并产生包括这个建筑几何信息的E+输入数据文件。对于BSPro COM-Server的E+客户（这里的to，应是从属关系吧？a key to my bike），涉及IFCtoIDF utility（E+里的一个工具）。现有IFCtoIDF utility的版本与E+1.2.2版本兼容，并可以单独下载。绿色建筑博客ulbX Ef@^5n|

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t0IFCtoIDF Utility Limitations绿色建筑博客X#tup[$B$[D ]
Please note that the IFCtoIDF utility is still in beta testing. This utility, along with the BSPro COM-Server and several other software tools have been officially certified by the IAI as being compliant with IFC Releases 1.5.1 and 2.0 and are in the process of certification for Release IFC 2x. However, this does not mean that the utility is capable of seamlessly importing all data required for an EnergyPlus simulation from an IFC data file. The utility focuses on geometry only at this point. For example, construction material characteristics are currently defaulted in the resulting IDF. These data are not imported from an IFC data file simply because there is not yet an IFC-compliant tool that provides a user interface for inputting material characteristics. Furthermore, interoperability based on the object-oriented IFC standard is still a relatively new technology. Even the seemingly simple exchange of geometry representing objects such as a space and the parts of walls, floors and ceilings that bound this space can result in misunderstandings between different tools. More experience in exchanging data between a wide variety of software tools is required before this technology matures to a stage of full and foolproof functionality.
Ody4V{7c8Xi0请注意IFCtoIDF utility还在测试阶段。这个utility，与BSPro COM-Server和许多其他软件工具，已经被IAI正式鉴定为与IFC 1.5.1 和 2.0版本兼容，与IFC2.x的兼容性正在测试中。然而，这并不意味着utility能从IFC数据文件中“无损”的（提取）所有E+模拟所需的数据。在这点上，utility仅仅聚焦几何条件。举个例子，结构材料特性现在在导入IDF文件时绿色建筑博客%v P[e(iP:yz z
是默认的。这些数据不能简单的从IFC数据文件中输出，因为还没有一个符合IFC标准的工具提供用来输入材料特性的用户界面。此外，基于原始对象的互用性IFC标准还是一个相对新的技术。甚至表面上，几何代表物（像空间和约束空间的墙体部分、地板和屋顶）看起来很简单的交换，都会导致不同工具间的误解。在这项技术成熟到一个完全和简单的阶段之前，在更大范围软件工具内，交换数据上的更多经验是急需的。绿色建筑博客3g/RP;pf(B;x8|D