%0 Report %D 2013 %T Transforming BIM to BEM: Generation of Building Geometry for the NASA Ames Sustainability Base BIM %A James O'Donnell %A Tobias Maile %A Cody Rose %A Natasa Mrazovic %A Elmer Morrissey %A Cynthia Regnier %A Kristen Parrish %A Vladimir Bazjanac %8 01/2013 %2 LBNL-6033E %0 Conference Paper %B SimBuild 2012 IBPSA Conference %D 2012 %T Mapping Hvac Systems for Simulation In EnergyPlus %A Tobias Maile %A Mangesh Basarkar %A James O'Donnell %A Philip Haves %A Kevin Settlemyre %X

For building energy simulation tools to be accessible to designers, tool interfaces should present a conventional view of HVAC systems to the user, and then map this view to the internal data model used in the tool. The paper outlines a process that enables design engineers to create HVAC system representations using industry standard terminology and system, icon and typological representations and convert that unified representation into the format required by the whole building energy simulation tool EnergyPlus. This paper describes each stage of the conversion process, which involves transformations between the following representations: 1) engineer's representation, 2) component connectivity representation, 3) representation in the internal data model used in the Simergy graphical user interface for EnergyPlus, and 4) EnergyPlus representation.

The paper also describes mappings between these representations and the development of a rule-based validation and assignment framework required to implement that mapping. In addition, the paper describes the implementation of this process in Simergy.

%B SimBuild 2012 IBPSA Conference %C Madison, WI, USA %8 07/2012 %2 LBNL-5565E %0 Conference Paper %B IBPSA Building Simulation 2011 %D 2011 %T An Assessment of the use of Building Energy Performance Simulation in Early Design %A Vladimir Bazjanac %A Tobias Maile %A Cody Rose %A James O'Donnell %A Natasa Mrazovic %A Elmer Morrissey %A Welle, Benjamin %B IBPSA Building Simulation 2011 %C Sydney, Australia %8 11/2011 %G eng %0 Conference Paper %B CIB W078-W102 %D 2011 %T Data Enviroments and Processing in Sem-Automated Simulation with EnergyPlus %A Vladimir Bazjanac %A Tobias Maile %A James O'Donnell %A Cody Rose %A Natasa Mrazovic %B CIB W078-W102 %C Sophia Antipolis, France %G eng %0 Conference Paper %B IBPSA Building Simulation 2011 %D 2011 %T SimModel: A domain data model for whole building energy simulation %A James O'Donnell %A Richard See %A Cody Rose %A Tobias Maile %A Vladimir Bazjanac %A Philip Haves %X

Many inadequacies exist within industry-standard data models as used by present-day whole-building energy simulation software. Tools such as EnergyPlus and DOE-2 use custom schema definitions (IDD and BDL respectively) as opposed to standardized schema definitions (defined in XSD, EXPRESS, etc.). Non-standard data modes lead to a requirement for application developers to develop bespoke interfaces. Such tools have proven to be error prone in their implementation – typically resulting in information loss.

This paper presents a Simulation Domain Model (SimModel) - a new interoperable XML-based data model for the building simulation domain. SimModel provides a consistent data model across all aspects of the building simulation process, thus preventing information loss. The model accounts for new simulation tool architectures, existing and future systems, components and features. In addition, it is a multi-representation model that enables integrated geometric and MEP simulation configuration data. The SimModel objects ontology moves away from tool-specific, non-standard nomenclature by implementing an industry-validated terminology aligned with Industry Foundation Classes (IFC).

The first implementation of SimModel supports translations from IDD, Open Studio IDD, gbXML and IFC. In addition, the EnergyPlus Graphic User Interface (GUI) employs SimModel as its internal data model. Ultimately, SimModel will form the basis for a new IFC Model View Definition (MVD) that will enable data exchange from HVAC Design applications to Energy Analysis applications. Extensions to SimModel could easily support other data formats and simulations (e.g. Radiance, COMFEN, etc.).

%B IBPSA Building Simulation 2011 %8 10/2011 %G eng %2 LBNL-5566E %0 Conference Paper %B IBPSA Building Simulation 2011 %D 2011 %T A software tool to compare measured and simulated building energy performance data %A Tobias Maile %A Vladimir Bazjanac %A James O'Donnell %A Matthew Garr %X

Building energy performance is often inadequate when compared to design goals. To link design goals to actual operation one can compare measured with simulated energy performance data. Our previously developed comparison approach is the Energy Performance Comparison Methodology (EPCM), which enables the identification of performance problems based on a comparison of measured and simulated performance data. In context of this method, we developed a software tool that provides graphing and data processing capabilities of the two performance data sets. The software tool called SEE IT (Stanford Energy Efficiency Information Tool) eliminates the need for manual generation of data plots and data reformatting. SEE IT makes the generation of time series, scatter and carpet plots independent of the source of data (measured or simulated) and provides a valuable tool for comparing measurements with simulation results. SEE IT also allows assigning data points on a predefined building object hierarchy and supports different versions of simulated performance data. This paper briefly introduces the EPCM, describes the SEE IT tool and illustrates its use in the context of a building case study.

%B IBPSA Building Simulation 2011 %C Sydney, Australia %8 11/2011 %2 LBNL-6184E %0 Conference Proceedings %B SimBuild 2004, Building Sustainability and Performance Through Simulation %D 2004 %T IFC HVAC Interface to EnergyPlus: A Case of Expanded Interoperability for Energy Simulation %A Vladimir Bazjanac %A Tobias Maile %B SimBuild 2004, Building Sustainability and Performance Through Simulation %C Boulder, Colorado, USA %8 08/2004 %G eng %0 Conference Paper %B SimBuild 2004 %D 2004 %T IFC HVAC interface to EnergyPlus - A case of expanded interoperability for energy simulation %A Vladimir Bazjanac %A Tobias Maile %B SimBuild 2004 %C Boulder, CO %8 08/2004 %G eng %L LBNL/PUB-907 %1

Simulation Research Group

%2 LBNL/PUB-907