1、Building Energy AnalysisEnergyPlusReporter ： WuDingxinWhat is Simulation?o Definition: “the imitative representation of the functioning of one system or process by means of the functioning of another ” (Merriam-Webster Dictionary On-Line)What is Building Thermal Simulation?o Approximate definition:
2、a computer model of the energy processes within a building that are intended to provide a thermally comfortable environment for the occupants (or contents) of a buildingo Examples of building thermal simulation programs: EnergyPlus, BLAST, PKPM, DOE-2, DeST, TRNSYS, eQUEST etc.What is EnergyPlus?o E
3、nergyPlus is an energy analysis and thermal load simulation programo Based on a users description of a building from the perspective of the buildings physical make-up and associated mechanical and other systemsWhat is EnergyPlus?o Support byn Department of Energy,DOEo Developed byn Lawrence Berkeley
4、 National Laboratory,LBNLn University of Illinoisn U.S.Army Construction Engineering Research Laboratoryn Oklahoma State UniversityWhat is EnergyPlus?o Fully integrated building Object,data,data,data;Input Data Dictionary(IDD)Input Data Files (IDF)Weather Data(epw file)o Weather year for energy use
5、comparisons, similar to other programso Hourly, can be subhourlyo Hourly data is linearly interpolatedo Data include temperature, humidity, solar, wind, etc.o Several included in standard installHow to install EnergyPlus o Download Freehttp:/apps1.eere.energy.gov/buildings/energyplus/EnergyPlus Inte
6、rfaceo Start Menu ShortcutsDocs Menu PageEP-CompareEP-LaunchIDF ConverterIDF EditorEnergyPlus Interfaceo Docs Menu Pageo Getting Startedo Input/Output Referenceo Output Details/Exampleso Engineering Referenceo Auxiliary Programso Applicaion Guideso Development Guideso AcknowledgmentsEnergyPlus Inter
7、faceo EP-CompareResults Comparison of different models with graphsEnergyPlus Interfaceo EP-Launchn Assistance in running EnergyPlusn Reads EPL-Run.bat filen Creates RunEP.bat file and executesn Displays run status (eplusout.end)n Can view all input and output Files n Several user options availableEn
8、ergyPlus Interfaceo EP-LaunchAccess EnergyPlus documentationSelect and edit input fileSelect weather fileView output filesEdit IDF fileRun EnergyPlusEnergyPlus Interfaceo EP-Launch MenuInput FileWeather FileTransition VersionNew GroupEnergyPlus Interfaceo EP-Launch MenuText EditorIDF EditorWeather T
9、ext EditorEnergyPlus Interfaceo EP-Launch MenuOptionsAll kinds of Output filesEnergyPlus Interfaceo IDF EditorSelect object type from class listDescription of entry, max and min when applicableEdit ToolsPull-down list of keywords or references when applicableEnergyPlus Interfaceo EP-Launch Finish St
10、atus2 Warning,0 Severe ErrorsEnergyPlus Interfaceo EnergyPlus crash within EP-LaunchEnergyPlus EnvelopeBuildingZone ZoneZone more zonesSurface SurfaceSurface Surface more surfacesConstructionMaterialMaterial Material Material more materialsonly one construction per surfaceEnergyPlus Envelopeo Surfac
11、eGeometryY AxisX Axis Z Axis Building and/or Zone North Axis EastUpEnergyPlus Envelopeo Relative Coordinate Optionso Building North Axisn Relative to true northn Rotates about bldg origino Zone North Axisn Relative to building northn Rotates about zone origino Zone Originn Relative to building origi
12、n (0,0,0)o Surface vertices in zone coordinatesEnergyPlus Envelopeo Door and Window DetailsEnergyPlus Envelopeo Shading SurfaceA (0,0,0) Upper Left Corner Vertex for Overhang C B D EnergyPlus Thermal Zoneso Defining Thermal Zones by Objectiven Air flow study: sizing fans and ductsn “Block loads” or central plant study: sizing of heating and cooling producerso Defining Thermal Zones by Design Conditionn “DT” test: if there is an air temperature difference between adjacent spaces, separate thermal zones are neededn Might also be seen in different control types
