Energy Plus Overview

EnergyPlusEnergyPlus Overview

Material prepared by GARD Analytics, Inc. under contract to the U.S. Department of Energy. All material Copyright 2002-2011 U.S. Department of Energy - All rights reserved.

E Pl TEnergyPlus Team U S Department of Energy DC U.S. Department of Energy, DC Lawrence Berkeley National Laboratory, CA National Renewable Energy Laboratory, CO Oak Ridge National Laboratory TN Oak Ridge National Laboratory, TN Pacific Northwest National Laboratory, WA Florida Solar Energy Center, FL DHL Consulting, CO GARD Analytics, IL Oklahoma State University, OK University of Illinois at Urbana-Champaign, IL COP Associates, MN Wrightsoft, MA

2

Wrightsoft, MA

E Pl TEnergyPlus Team

COPPNNL

WSGARDUIUCNREL

DHLLBNL DOE

WS

DHL ORNLOSU

FSEC

3

Wh t i E Pl ?What is EnergyPlus?

Fully integrated building & HVAC simulation program Based on best features of

BLAST (U.S. Dept of Defense) andBLAST (U.S. Dept of Defense) and DOE-2.1E (U.S. Dept of Energy)plus many new capabilities

Windows XP/Vista/System 7 Linux Mac Windows XP/Vista/System 7, Linux, Mac 32-bit and 64-bit versions

Main install is simulation engine and select utilities Interfaces available separately

Info at www.energyplus.gov

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V i St tVersion Status

Current version 6.0.0, October 2010

Twice yearly updates—April and October No full release in April 2011, will instead have a

May 2011 bug-fix releaseMay 2011 bug fix release

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E Pl C tEnergyPlus ConceptsSimple input/output file structuresSimple input/output file structuresNo surface, zone or system limits

Defaults to 500 zones per air handler and 500 Defaults to 500 zones per air handler and 500 coils per plant loop, but this can be increased by editing master file (IDD) if needed

Other software linked inOther software linked in AIRNET, multi-zone air flow combining wind-

induced flow and air distribution systemy DElight complex daylighting Slab & Basement, 3-d heat transfer preprocessors

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EnergyPlus Structure withe gy us St uctu e tIntegrated Simulation Manager

ta

Building Description

EnergyPlus

Da

DescribeBuilding

Third-PartyHeat andM Building

Dat

a

EnergyPlusSimulation Manager

Dat

a

Window 5 SPARKUser

Interfaces

Zone

Conditions

MassBalance

Simulation

BuildingSystems

Simulation

Calcs

AirflowNetwork

Ground HtTransfer

SPARK

PollutionModels

On-SitePower

Update

Feedback

Conditions

Calculation Results

Data

Data

DisplayResults

FutureModules

FutureModules

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Data

Integrated Simulation gManager

Si l i l i f l d d l Simultaneous simulation of loads, systems and plant Building Heat Balance Manager HVAC System Simulation Manager

Air and water loops are solved iteratively at each time step Not a single-pass calculation as in some other hourly

i l ti t lsimulation tools Tighter coupling between the air- and water-side of the

system and plant Loads “not met” result in zone temperature and Loads not met result in zone temperature and

humidity changes Allows capacity limits to be modeled more realistically

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Loads Features and Capabilities

Heat Balance MethodHeat Balance Method Room and surface heat balance every time step Conduction convection radiation Conduction, convection, radiation

Sub-hourly time steps Default is six 10-minute timesteps per hour Default is six 10 minute timesteps per hour

Room air models Default is “well-stirred” with uniform temperature Default is well-stirred with uniform temperature Other options: displacement vent, cross vent,

UFAD, Mundt, user-defined temperature patterns

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Loads Features and Capabilities (cont’d)

f h fRoom surface heat transfer 1-D heat transfer Uniform surface temperatures Uniform surface temperatures Uniform long and short wave radiation Diffuse radiating and reflecting surfaces Internal heat sources (optional)

Time dependent conduction - thermal mass Conduction transfer functions (default) Conduction transfer functions (default) Optional finite difference model

Optional variable properties to model phase-change materials

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to model phase change materials


Moisture Models Effective Moisture Penetration Depth (EMPD)

Simplified moisture model Moisture absorbed/released, no transport through

surfaces Estimates moisture interactions between the space air

and interior surfaces and furnishings

Combined Heat And Moisture Finite Element Combined Heat And Moisture Finite Element Heat and moisture transfer model (advanced feature) MaterialProperty:HeatAndMoistureTransfer:*

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Loads Features and Capabilities

How does EnergyPlus calculate what it will take to keep a zone at the desired thermal

diti ?conditions? EnergyPlus contains the heat balance engine from

IBLAST a research version of BLAST withIBLAST, a research version of BLAST with integrated loads and HVAC calculation. The major enhancements of the IBLAST heat balance

i i l d t f d di t h ti dengine include mass transfer and radiant heating and cooling

Essentially identical in functionality to the Loads Toolkit de eloped nde ASHRAE Resea ch P oject (RP 987)

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developed under ASHRAE Research Project (RP-987)


Three models connected to the main heat balance routine are based on

biliti f DOE 2capabilities from DOE-2 Daylighting simulation

C l l t h l i t i d li ht ill i Calculates hourly interior daylight illuminance, window glare, glare control, electric lighting controls, and calculates electric lighting

d ti f th h t b l d lreduction for the heat balance module

WINDOW 5-based window calculationAnisotropic sky

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Anisotropic sky

E l Hi hEnvelope Hierarchy

Building

Zone ZoneZone … more zones

Surface SurfaceSurface Surface … more surfaces

Construction

M t i lM t i l M t i l M t i l more materials

only one construction per surface

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MaterialMaterial Material Material … more materials

K d S f G tKeyword: SurfaceGeometry

Three dimensional (3D) C te i n Building and/or Zone North Axis(3D) Cartesian coordinate system

Right hand

Z AxisBuilding and/or Zone North Axis

Right hand coordinate system X-axis points east

Y Axis

Y-axis points north Z-axis points up

X Axis

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Keyword: SurfaceGeometry ey o d Su aceGeo et y(cont’d)

Vertex-based Specify 3D coordinates of each corner of a surface

W ld C di tWorld Coordinates All coordinates refer to global origin Building and Zone north axes ignored Building and Zone north axes ignored Zone origins ignored (except for daylighting)

Relative CoordinatesRelative Coordinates Zones relative to building Surfaces relative to zones

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Subsurfaces relative to zones

Keyword: SurfaceGeometry ey o d Su aceGeo et y(cont’d)

Surface starting position, looking from outside UpperLeft, UpperRight, LowerLeft, LowerRight

O d f t tOrder of vertex entry Clockwise, Counterclockwise

Coordinate systemCoordinate system WorldCoordinateSystem, RelativeCoordinateSystem

IDF Example: IDF Example:SurfaceGeometry,

UpperLeftCorner, !- SurfaceStartingPositionCounterClockWise !- VertexEntry

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CounterClockWise, ! VertexEntryWorldCoordinateSystem; !- SurfaceGeometryKey

T f S fTypes of Surfaces

Surface:HeatTransfer Surface:HeatTransfer:Sub Surface:HeatTransfer:InternalMass

Surface:Shading:DetachedSurface:Shading:Detached Surface:Shading:Detached:Fixed

S f Sh di D t h d B ildi Surface:Shading:Detached:Building

Surface:Shading:Attached

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Heat Transfer Surface (cont’d)

Exterior surfaces cast shadows Shadows only cast in the y

direction of the outward facing normal

A roof extended beyond th ll ill t tthe walls will not cast shadows downward

Interior surfaces do not t h dcast shadows

All surfaces reflect solar as diffuse inside zone

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H t T f S b fHeat Transfer Subsurface

Surface:HeatTransfer:SubWindows, Doors, Glass DoorsWindows, Doors, Glass Doors

Only windows and glass doors transmit sunlightsunlight

Can have interior windows

Must be placed on a base surfaceMust be placed on a base surfaceCannot completely cover base surface

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D d Wi d D t ilDoor and Window Details(a)

Outside reveal defined by window

i Inside

Wall

I id

(b)(a)

Outsidevertices WindowFrame

AndDivider f

InsideRevealSurface

OutsideRevealDepth

OutsideRevealDepth

InsideRevealDepth

Glazing

OutsideRevealSurface

InsideRevealDepth

specifies details of frame, sill, inside reveal W ll

Inside SillDepth

Glazing

Sill Inside SillDepth

Glazing

Frame

inside reveal, etc.

Wall

Wall

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Sh di S fShading Surface

Three typesTransmittance

hed le

Upper Left Corner Vertex for Overhang

schedule (default is always opaque)

A

C

D

y p q )Automatically

mirrored to cast h d

B

shadows in both directions

Must specify

(0,0,0)

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Must specify vertices

M t i l E lMaterial ExampleMATERIAL:REGULAR Options: VeryRough, MATERIAL:REGULAR,

PLASTERBOARD-2, !- NameRough, !- Roughness0.01, !- Thickness {m}

/

p y g ,MediumRough, Rough, Smooth, MediumSmooth, VerySmooth

0.16, !- Conductivity {W/m-K}950.0, !- Density {kg/m3}840.0, !- Specific Heat {J/kg-K}0.9, !- Thermal Absorptance0.9, ! Thermal Absorptance0.6, !- Solar Absorptance0.6; !- Visible Absorptance

Parameters Affecting:

Convection—Roughness Conduction—Thickness, Conductivity, Density, Specific Heat Radiation—Absorptances

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Radiation Absorptances Material:Regular-R and Material:Air contain a subset of the above information (see IDD for more details)

M t i l f O S fMaterials for Opaque Surfaces

Material:RegularMaterial:Regular Has thermal mass Thickness, conductivity, density, and specific heat Thickness, conductivity, density, and specific heat

Material:Regular-R Has no thermal mass Specify only thermal resistance

Material:Air Also no thermal mass, just resistance Cannot be an outside layer, no absorptances

Oth i d l d M t i l R l R

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Otherwise, modeled same as Material:Regular-R

C t tiConstruction

List material layers from outside to inside

Convection coefficients (film layers) are added automaticallyadded automatically

IDF Example:CONSTRUCTIONCONSTRUCTION,

CEILING39, !- User Defined NameC5 - 4 IN HW CONCRETE, !- Outside LayerE4 - CEILING AIRSPACE, !- Layer #2

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E5 - ACOUSTIC TILE; !- Inside Layer

HVAC Features and Capabilities

Flexible specification of HVAC equipment Components arranged on loops Not limited to predefined system configurations

“HVACTemplates” for standard system fconfigurations

More than one system may serve a zone e.g. Dedicated outdoor air system

plus fan coil units

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HVAC I t O iHVAC Input Overview

Hierarchical set of objects Loops (air, chilled & hot water, condenser) Supply and demand sides Topology of sides: branches, splitters, and mixers

h l l d Branches: components along a single duct or pipe Components: specific pieces of equipment

Nodes: store components’ inlet & outlet conditions Nodes: store components’ inlet & outlet conditions

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HVAC I t O i ( t’d)HVAC Input Overview (cont’d)

Multiple systems or zone components can serve each zone

EnergyPlus HVAC simulation attempts to satisfy the conflicting demands of:to satisfy the conflicting demands of: Input simplicity & usability Input flexibility & generality Input flexibility & generality Simulation robustness

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E Pl HVAC L O iEnergyPlus HVAC Loop Overview

Loop Types: Air Loop Zone Equipment Loop Plant Loop Supply Sidep pp y Plant Loop Demand Side Condenser Loop Supply Side Condenser Loop Supply Side Condenser Loop Demand Side

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Ai LAir Loop

Air side of the secondary systemTypically contains equipment such as aTypically contains equipment such as a

fan, coils, mixing box, etc.Where the centralized conditioning ofWhere the centralized conditioning of

air takes place—before splitting off to zones before reheat before individualzones, before reheat, before individual VAV dampers, etc.

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Z E i t LZone Equipment Loop

Equipment that is more specific to a particular thermal zone

May include splitters and air distribution units which split up flow from the airunits which split up flow from the air loop

Can have multiple systems servingCan have multiple systems serving individual zones

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Z E i t S h tiZone Equipment Schematic

Return AirPath

Zone Exhaust Branch (Opt.)

NoneDualDuct

ConstantVolume

(CV)

ZoneSupply AirSplitter

Zone 1

SingleDuct CVReheat

DualDuctVAV

SingleDuct

Select OneAir

DistributionUnit

AirDistribution

Unit

LocalCon-

vectiveUnits

HighTemp

Radiant/Con-

vective

LowTemp

Radiant

VAV:Reheat

S l O

UnitOptions

Diagram from Input Output Reference p. 208 (not all equipment types are included)

Air-AirHP

UnitHeater/Vent-

Fan CoilWindowAC

Base-boardsRadiatorsHigh

Temp

LowTemp

Radiant

SelectOne

Select OneSelect One

Water-AirHP &

Ground

equipment types are included)

ilatorTemp

RadiatorsPanels

Local Conv. Unit AlternativesHi Temp Rad/ConvAlternatives

Low Temp RadAlternatives

GroundSource

HP

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Pl t D d SidPlant Demand Side

Water side of coils, radiant systems, etc. that require conditioned fluid to provide either heating or cooling to the zone (the “demand”)

Connects to air loop or zone equipment loop through individual componentsloop through individual components

Connects to plant supply side through direct fluid connectiondirect fluid connection

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Pl t S l SidPlant Supply Side

Supplies hot or cold fluid to meet the demands of the plant demand side

Eq ipment m in l de p mp hilleEquipment may include pumps, chillers, boilers, etc.

Typically controls both flow rate (via pump)Typically controls both flow rate (via pump) and temperature (loop setpoint)

Connects directly to plant demand side y pConnected indirectly to condenser demand

side through components

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Condenser Supply and Demand Co de se Supp y a d e a dSides

Analogous to plant supply and demand sides Condenser demand receives heat rejection from plant

supply side equipmentsupply side equipment Condenser supply side tries to supply the conditioned

fluid by rejecting heat to external environmentC d l id l b d Condenser supply side may only be connected to condenser demand side

Condenser demand side also connected indirectly to yplant supply side through components and may also be connected to air loop and zone equipment loop through componentst oug co po e ts

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EnergyPlus HVAC Loop e gy us C oopInteraction

Building Systems Simulation Manager

Zone

ConditionsSimulate Building

S

Zone

Conditions

CorrectorSystems

Predictor

Air Loop

Plant Loop

Condenser LoopDemand Supply

Main Air Handler Coils,Baseb.,etc.

PlantEquip.

Cond., Coils,etc.

Towers,Wells,etc.

Demand Supply

Zones & Equip.

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Loops, Branches, Components, oops, a c es, Co po e ts,and Nodes

Comp

…BranchesComponents

Comp Comp Comp Comp

SplitterBranches

Comp

…

Comp

…

Comp

…

Comp

…

…

Loop

Comp

Mixer

Nodes…

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E Pl N dEnergyPlus Nodes

A node is the point at which a component,

hChillerCHWR CHWS

such as a source or a load, is connected to the system

Nodes

the system.CHWS CHWR

Nodes

Load

Nodes

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E Pl N d ( t’d)EnergyPlus Nodes (cont’d)

Nodes connect components in HVAC network

Store network state data temperature, humidity, flow rate, pressure

(air only) at current barometric pressureAlso store control information: set

i tpointsStore component input and output data

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E l N d DiExample Node Diagram1

2

Return Fan1

7 82 3

MA Damper4 3

8 9765

Mixed Air SystemManager

Heat Recovery5 6

3 4

Desiccant Wheel

6 7

102

1 13

12

11

Supply Fan

89

Desiccant Wheel

Zone9

10 12

Heating Coil

10 11

12 13

10 12Splitter

Cooling Coil

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E Pl N d ( t’d)EnergyPlus Nodes (cont’d)

Components have one or more pairs of inlet/outlet nodes Fan: Air inlet node, Air outlet node CHW Coil: Air inlet node, Air outlet node,CHW Coil: Air inlet node, Air outlet node,

CHW inlet node, CHW outlet node

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HVAC T l t d A t i iHVAC Templates and Autosizing

Templates are a time saving feature that: Provides a shorthand way of describing systems

A i t i th f tti t th Assists in the process of putting together EnergyPlus input

Autosizing helps the user:Autosizing helps the user: Determine the size of equipment needed based on

the building description, thermal loads, etc.A id th d t id i f Avoids the need to provide a size for some equipment which may not be of interest but is still needed as input for EnergyPlus

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T l t C tTemplate Concepts

Beneficial for setting up the loops, branches, and nodes

Not as beneficial for fans, pumps, chillers, coils, etc.,

The only "automatic" fields are the object name, node names, and maybe flow rates.

For autosized templates the defaults are already specified

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HVAC T l t St tHVAC Template StructureI t Fil i f EP-Launch or RunEplus.batInput File.imf

##include HVACTemplates.imf

Regular EnergyPlus objectsRUN PERIOD, 1, 1, 12, 31;. . .

EP-Macro.exe

EP Launch or RunEplus.bat

HVAC Template commands:##set1 ZoneName = "RESISTIVE ZONE"##set1 AvailSched = "FanAndCoilAvailSched"##set1 HeatSuppAirTemp = 50##set1 CoolSuppAirTemp = 13## t1 H tS Ai HR 0 015

EPMIDF FileRegular EnergyPlus objects

after macro processing(“Clean IDF file”)

##set1 HeatSuppAirHR = 0.015##set1 CoolSuppAirHR = 0.010PurchAirZone[]. . . EnergyPlus.exe

EnergyPlus output files



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E l HVAC T l tExample HVAC Templates

Zone ThermostatPurchased Air u c asedFour Pipe Fan CoilVAV Single Duct w/ ReheatVAV Single Duct w/ ReheatPackaged Furnace w/ DX Air Conditioner

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C t Si iComponent Sizing

Components are typically autosized based on specified summer and winter design days.

Global sizing factor optionalGlobal sizing factor optional Sizing factor typically >1.0 Sizing factor can be any value >0 Sizing factor can be any value >0 Default 1.0

SIZING PARAMETERS,

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,1.2; !- sizing factor

Z Si iZone Sizing

Calculates required supply air volume to maintain zone setpoints

Comp te m im m ooling lo d he tingComputes maximum cooling load, heating load and air flow for systems sizing and sizing zone componentsp

Only controlled zones are included in zone sizing calculations

OA flow per person based on total number of people for all PEOPLE statements in zone (schedule values are not applied)

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(schedule values are not applied)

S t Si iSystem Sizing

Calculates design air flow rates and heating and cooling capacities based on specified

l i diti d i i ltsupply air conditions and zone sizing resultsMust use zone sizing objects to force hard

i ( ill t d t i )sizes (will not read component sizes)Only controlled zones are included in system

sizing calculationssizing calculations

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A t Si iAuto-Sizing

Generate sizing report files (.zsz, .ssz)Outside air optionsOutside air optionsSupply-side equipment sizing

Si d “ ” ith t d iSize and “go” runs with computed sizesUses all design days and selects max size

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A t Si i C l l tiAuto-Sizing Calculation

A “Purchased Air” simulation is performed for each zone using user specified Design Day weather Purchased Air: hot or cold air supplied pp

directly to a zone at a fixed temperature and with infinitely variable air flow.

The Purchased Air simulation yields zone design air flow rates.

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Auto-Sizing Calculation g(cont’d)

The zone design air flow rates are summed to give central air handler

i id t i id t d i flcoincident or non-coincident design flow rates.U ifi d d i lUser specified design supply temperatures and the design weather conditions are used to calculate zoneconditions are used to calculate zone and system design heating and cooling capacities

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capacities.

Auto-Sizing Calculation g(cont’d)

Coil UAs and other component inputs are obtained by iterating the component models to meet the design outlet conditions

Coil water flow rates are summed to obtain plant loop hot and chilled waterobtain plant loop hot and chilled water flow rates

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I t lli E PlInstalling EnergyPlus

After installation the EnergyPlus directory will contain the following subdirectories (if default components are selected):components are selected):

BACKUP DataSets

PostProcess PreProcess DataSets

Documentation Example Files

PreProcess WeatherData

Default path is C:\EnergyPlusV6-0-0

p MacroDataSets

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Default path is C:\EnergyPlusV6-0-0

S I t t Fil TSome Important File Types

IDF (input data file): Text file describing building and HVAC system Edit with text editor or the EnergyPlus IDF editor

EPW (EnergyPlus weather): Text file containing weather data used by simulation engine

ERR (error): Text file of input and simulation error descriptions ERR (error): Text file of input and simulation error descriptions ESO (EnergyPlus standard output) and MTR (meter output):

comma-separated text files of results View using xEsoView View using xEsoView

DXF (AutoCad drawing format) shows building surfaces defined in IDF file

View using TrueView or VoloView View using TrueView or VoloView

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DataSets and MacroDataSets FoldersS d fi d Obj DataSets – Predefined Objects

Materials Constructions Schedules Chillers Holidays and more

MacroDataSets ##def blocks for parametric batch runs Utility rate tariffs and emissions factors for

37 utilities (2000-2005 data) Solar collector performance data

PV f d t

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PV performance data

E l Fil F ldExampleFiles Folder

O 300 l i Over 300 example inputs Named by key feature,

5ZoneSupRetPlen.idf = “5 t ith l“5 zone system with supply and return plenum”

ExampleFiles.xlsT bl f k f tTable of key features

ExampleFiles-ObjectsLink.xlsLookup by object class name

Many concepts bestlearned by example

BasicsFiles – tutorial examples,

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p ,see “Getting Started” doc

W th D t F ldWeatherData Folder

EPW WeatherData 5 locations included in standard install Download additional EPW weather files Download additional EPW weather files

at www.energyplus.gov 1000s of sites available worldwide

DDY Files DDY Files ASHRAE Design Days and

Location in EnergyPlus syntaxsyntax

Included in weather zip files from www.energyplus.gov

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gyp g

Weather Data(epw file)

Weather year for energy use comparisonsHourly data typical, can be subhourlyCan be less than a full yearData include temperature, humidity, solar,

wind rain and snow flags rainfall etcwind, rain and snow flags, rainfall, etc. Interpolated for EnergyPlus time steps

Solar values are mid hour average or total Solar values are mid-hour average or total All other values are on-the-hour instantaneous Linear interpolation for each time step

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p p

S f I t D tSources of Input Data

User interfaces and other utilitiesUser interfaces and other utilitiesCADD programs

Trace over DXF in some EnergyPlus interfacesgy OpenStudio Plugin for Google Sketchup Green Building Studio (gbxml) supports older version EnergyPlugged (AutoCAD plug-in to create and edit EnergyPlugged (AutoCAD plug in to create and edit

EnergyPlus input files). Graphisoft ArchiCad direct export in ? Bentley acquired HEVACOMP investigating MicroStation link Bentley acquired HEVACOMP, investigating MicroStation link

Window5/6 Window thermal and optical data

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pwindows.lbl.gov/software/window/window.html

St t M Sh t tStart Menu Shortcuts

Start Programs EnergyPlus V6-0 Programs Documentation Main Menu

h h b EP-Launch – home base IDFEditor – input file editor Readme Readme Uninstall Weather Converter Weather Converter WinEPDraw –

dxf drawing tool

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g

EP-Launch Provides a Way to Open FilesEP Launch Provides a Way to Open Files and Run Simulations

Select input (IDF) and weather filesAssociate files with the appropriateAssociate files with the appropriate

program or viewerOpen input and output filesOpen input and output filesStart simulations and view error files

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EnergyPlus Private Sector User Interfaces

PV modeling by EnergyPlus

BEEBEE (Chi )(Chi )BEE BEE (Chinese)(Chinese)TREAT PlusCOMFENESP-r E GEFEN

ECOTECT

EnergyGaugeEPlusInterfaceHVAC EnergySolarShoeBox

E Vi

EFEN

62EP-Quick

xEsoViewothers, ….

EnergyPlus Example File gy pGenerator

Web formCreate generic buildingsSelect from 5 StdsSubmit and run remotely Input and output

sent via e-mailS b it t fil tSubmit custom file to

conform to StdLink at

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Link at www.energyplus.gov/interfaces_tools.cfm

OpenStudio Plugin Ope Stud o ugfor SketchUp

SketchUp Intuitive 3-D drawing software

A il bl f G l Available from Google as free or pro versions

Plugin adds EnergyPlusPlugin adds EnergyPlus functionality to the SketchUp 3-D environment

/ d l l Create/Edit EnergyPlus Input Files Run EnergyPlus and view results Automatically create prototype and code

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Automatically create prototype and code compliance building models (future v1)

E Pl S t REnergyPlus Support Resources

E Pl W b it ( l ) EnergyPlus Web site (www.energyplus.gov)

free program download documentation weather data (more than 2,100 locations worldwide) testing and validation reports developer & commercial distribution licensesdeveloper & commercial distribution licenses

User Support Helpdesk

energyplus helpserve com energyplus.helpserve.com submit questions via Web: energyplus.helpserve.com via email: [email protected] email: EnergyPlus [email protected] attach input files as needed

EnergyPlus Support ResourcesEnergyPlus Support Resources (cont.)

E Pl Y h T h i l G EnergyPlus Yahoo Technical Group user-to-user forum

j i E Pl S t Y h G t join EnergyPlus-Support Yahoo Group athttp://groups.yahoo.com/group/EnergyPlus_Support

subscribe by sending email [email protected]

post messages by sending email toEnergyPlus Support@yahoogroups [email protected]

Buildings Designed Using EnergyPlus

San Francisco Federal BuildingN t l til ti t Natural cross‐ventilation system

No mechanical cooling in high‐rise portion

Building management controls Building management controls

San Diego Supercomputer Center• Thermal simulation

• Natural displacement ventilation analysis

• Climate analysis


Evergreen Valley College Arts Center San Jose CACenter, San Jose, CA Low energy cooling including natural ventilation and radiant floor systems

Heritage Middle School, MNg , 16,000 m2 (173,000 ft2) new school

Load calculation and evaluationLoad calculation and evaluation of energy efficiency measures


Freedom Tower Building energy Building energy

simulation of alternatives

Aggressive energy and i t l lenvironmental goals

Code compliance

New York Times Building energy simulation of Building energy simulation of

alternatives Controls, peak demand,

energy use impacts

Documents

Energy Plus Overview