chang liu | lighting + electrical m.a.e./b.a.e. …...2702.2.6 accessible means of egress platform...

Renzo Museum of American ArtNew York, NY

Chang Liu | Lighting + ElectricalM.A.E./B.A.E. Integrated Degree

Technical Assignment 2 | October 12, 2012Faculty Consultants: Ron Dodson

ChangLiu HoustonMuseumofAmericanArtLighting+Electrical NewYork,NY

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Executive Summary This report provides an analysis of the electrical systems of Houston Museum ofAmericanArt.Analysisincludesdevelopingtheelectricalsystemscriteriaandscopeofwork,presenting the currentlydesignedelectrical system,aswell as evaluationandsuggestionsforpotentialchanges.Loadcalculationwasperformed.Informationregarding IBC, NEC code requirement, currently-designed electrical systems wasinvestigated.Overall, the museum of American Art utilizes an integrated building system. Thecontrol system for the building equipment operates using BMS via BACnet. Thecurrentelectricaldesign isappropriate. In theattempt toachieveLEEDgold,well-thoughttechnologyandequipmentchoiceareusedfortheelectricalsystemsuchascogenerationtohelpwithenergyreduction.


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Table of Contents Executive Summary ............................................................................................................................................... 2Part 1 Develop the Electrical Systems Criteria and Scope of work ...................................................... 5Preliminaryelectricalloadcalculation.....................................................................................................................................5Powercompanyandpreliminaryrateschedule.................................................................................................................5Preliminarybuildingutilizationvoltage..................................................................................................................................5Emergencypowerrequirements..................................................................................................................................................5Specialoccupancyrequirements..................................................................................................................................................6Specialequipment..................................................................................................................................................................................7Priorityassessment...............................................................................................................................................................................7Optionalback-uppower.....................................................................................................................................................................7Special/communicationssystems................................................................................................................................................7Otherbuildingservices.......................................................................................................................................................................8Majorequipment.....................................................................................................................................................................................8Part 2 Understand and Describe the Electrical Systems as Currently Designed ............................. 9Actualconnectedbuildingload.....................................................................................................................................................9Powercompanyandrateschedule..............................................................................................................................................9Buildingutilizationvoltage............................................................................................................................................................10Emergencypowersystemloads..................................................................................................................................................11Specialoccupancyrequirements................................................................................................................................................13Specialequipment................................................................................................................................................................................13Generalequipment..............................................................................................................................................................................14Optionalback-uploads.....................................................................................................................................................................15Special/communicationssystems..............................................................................................................................................16OtherBuildingServices....................................................................................................................................................................16Electricalandcommunicationsystemspaces....................................................................................................................17


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Energycostsavingsandenergyreductiontechniques.................................................................................................20Singlelinediagram..............................................................................................................................................................................20Part 3 Evaluation of Criteria vs. Current Design ...................................................................................... 21Buildingloads.........................................................................................................................................................................................21Powercompanyrateschedule.....................................................................................................................................................21Buildingutilizationvoltage............................................................................................................................................................21Emergencypowersystem...............................................................................................................................................................21Generalequipment..............................................................................................................................................................................22Optionalback-uppowerandUPSsystem.............................................................................................................................22Costreductiontechniques..............................................................................................................................................................22Systemsintegration.............................................................................................................................................................................22Energycostsavingsandenergyreductiontechniques.................................................................................................22


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Part 1 Develop the Electrical Systems Criteria and Scope of work PreliminaryelectricalloadcalculationToestimatethepreliminaryelectricalload,followingassumptionsaremade: Lighting:1.1W/SF(ASHREA90.1)Receptacles:1.0W/SFHVAC:4.5W/SFOthers:1.0W/SFDemandfactorsarelistedasfollowing: Lighting:125%Receptacles:first10kVA100%,rest50%HVACandothers:100%Basedontheassumptionsmadeanddemandfactor,thepreliminarytotalbuildingkVAarelistedasfollowing: Lighting:245kVA Receptacles:116kVA HVAC:1,000kVA Others:222kVAPowercompanyandpreliminaryratescheduleThemuseumofAmericanArtshallhaveasecondaryservicefromtheutilitycompany.ConEdisonisthemainpowercompanythatsuppliespowerforNewYork.

PreliminarybuildingutilizationvoltageThe buildingutilization voltage shouldbe480Y/277V,with lighting 277V, receptacle 120V,HVAC208V/480V,andspecialequipmentincludingelevators208V,3phase,audiosignalprocessing120V,informationtechnology120V.

EmergencypowerrequirementsTheemergencypowerforthemuseumofAmericanArt(A-3occupancy)shouldbeprovidedbyadieselgeneratorat480/277V.


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BasedonIBC,emergencypowershallbedesignedandconstructedasindicatedbelow: 2702.2.1GroupAoccupancies.Emergencypowershallbeprovidedforemergencyvoice/alarmcommunicationsystemsinGroupAoccupanciesinaccordancewithSection907.5.2.2.4.2702.2.2Smokecontrolsystems.StandbypowershallbeprovidedforsmokecontrolsystemsinaccordancewithSection909.11.2702.2.3Exitsigns.EmergencypowershallbeprovidedforexitsignsinaccordancewithSection1011.5.3.2702.2.4Meansofegressillumination.EmergencypowershallbeprovidedformeansofegressilluminationinaccordancewithSection1006.3.2702.2.5Accessiblemeansofegresselevators.StandbypowershallbeprovidedforelevatorsthatarepartofanaccessiblemeansofegressinaccordancewithSection1007.4.2702.2.6Accessiblemeansofegressplatformlifts.StandbypowerinaccordancewiththissectionorASMEA18.1shallbeprovidedforplatformliftsthatarepartofanaccessiblemeansofegressinaccordancewithSection1007.5.2702.2.7Horizontalslidingdoors.StandbypowershallbeprovidedforhorizontalslidingdoorsinaccordancewithSection1008.1.4.3. 2702.2.19Elevators.StandbypowerforelevatorsshallbeprovidedassetforthinSections3003.1,3007.7and3008.15.2702.2.20Smokeproofenclosures.StandbypowershallbeprovidedforsmokeproofenclosuresasrequiredbySection909.20.6.2.SpecialoccupancyrequirementsBasedonNEC2011chapter5,specialoccupancyrequirementsmaybeneededfor[520]Theaters


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forthetheaterlocatedonthe3rdfloor.

SpecialequipmentBasedonNEC2011chapter6,alistofpotentialspecialequipmentislistedbelow:[620]Elevators[640]Audiosignalprocessing[645]Informationtechnologyequipment[695]FirepumpsPriorityassessmentReliability-MediumPowerQuality-LowRedundancy-MediumInitialCost(lowinitialcost)-LowLongTermOwnershipCost-MediumFlexibility-HighOptionalback-uppowerLoadsmay desire optional back-up power for the project can be the lighting for themechanicalrooms.Special/communicationssystemsPotentialspecial/communicationssystemsforthebuildingarelistedbelow:Telephone/dataFireAlarmCATVOverheadPaging/intercomAccesscontrolSecurity–IntrusionDetection,VideoSurveillance

FireAlarmIBCrequirement:Amanual fire alarmsystem that activates theoccupantnotification system in accordancewithSection907.5shallbeinstalledinGroupAoccupancieshavinganoccupantloadof300


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ormore.PortionsofGroupEoccupanciesoccupiedforassemblypurposesshallbeprovidedwithafirealarmsystemasrequiredfortheGroupEoccupancy.ManualfirealarmboxesarenotrequiredwherethebuildingisequippedthroughoutwithanautomaticsprinklersysteminstalledinaccordancewithSection903.3.1.1andtheoccupantnotificationapplianceswillactivatethroughoutthenotificationzonesuponsprinklerwaterflow.ActivationofthefirealarminGroupAoccupancieswithanoccupantloadof1,000ormoreshall initiate a signal using an emergency voice/alarm communications system inaccordance with Section 907.5.2.2. Where approved, the prerecorded announcement isallowedtobemanuallydeactivatedforaperiodoftime,nottoexceed3minutes,forthesolepurpose of allowing a live voice announcement from an approved, constantly attendedlocation.OtherbuildingservicesOtherbuildingservicesmayberequiredarelistedbelow:TelephoneDataCATVMajorequipmentPotentialmajor equipment that should be used includes switchgear,main transformer and step-downtransformers,generator(ifindoor),ATS,distributionpanelboards.


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Part 2 Understand and Describe the Electrical Systems as Currently Designed ActualconnectedbuildingloadTheactualconnectedbuildingloadswerecalculatedandsummarizedinthefollowingtables: Table1Connectedbuildingloads

Connected Building Loads (KVA)

Lighting 179Receptacle 310

HVAC 1,234Special Equipment 276

Total loads 1,999 Table2ConnectedloadsforspecialequipmentConnected Loads Special Equipment (KVA)

BMS 8Dock Leveler 25

Pavement & Gutter snow melting 70Kitchen appliance 127Shade controller 4

UV sterilizer 4Mechanical Tools 38

PowercompanyandratescheduleTheutilitycompanyfortheprojectistheConsolidatedEdisonCompanyofNewYork.Theserviceisfeed to the switchgears located on the cellar level. The secondary service voltage is 208Y/120V.Informationabouttheratescheduleandprimaryservicevoltagewererequestedfromthebuildingowner.Figure1and2showstheserviceentrancedetail.

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Receptacles used are standard duplex convenience receptacles that shall be specification gradeNEMA5-15R,5-20R,2pole,3wire,grounded,15or20ampereratedfordevicesshownona15or20amperecircuitrespectively.For switch and receptacle wall plates, plastics are used for all back-of-house devices andarchitecturalmetalfinishareusedforallothers.Additionally,switchesare“Decora”style“Paddle”type.MotorsareTEFCpremium-efficiencytypeandbeprovidewithvariablespeeddrive.UPSare75KVA/64KWat0.9power factor.TheUPSsystemhasa20minutes lifeandanon-linedoubleconversionsystemwithwraparoundmaintenancebypasscircuit.Optionalback-uploadsAsmentioned in theEmergency system loadsection, there is anoptional emergencydistributionpanelboard EODP-C (208Y/120V, 3 phase, 4 wires) feeding power to sump pumps and ejectorpumpswhich are all 208V, 3 phase. The optional emergency distribution panelboard is directedfeedbytheemergencyswitchboard.Loaddetailsareindicatedinfigurebelow.

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Part 3 Evaluation of Criteria vs. Current Design

BuildingloadsThetotalactualbuildingloadisgreaterthantheestimatedload.Theactuallightingloadsarelessthantheestimated lighting loads.However,receptacles,HVACaswellasotherequipmentrequireadditional power than estimated. Larger HVAC loads may result from the rather large portionglazingofthefacades.Todifferentiatefromatraditionalmuseum,thetamuseumtakesupamodernsystemdesign.Extraloadsareresultedfromtheadditionalequipmentimplemented. estimated

kVA actual kVA

Lighting 245 179Receptacles 116 310HVAC 1,000 1,234Others 222 276Total 1,583 1,999

PowercompanyratescheduleNot sufficient information is obtained at the time of this report was written, thus no adequateevaluationcanbemade.BuildingutilizationvoltageTheactualbuildingutilizationvoltageis208Y/120Vinsteadoftheproposed480Y/208Vinpart1.480y/208V is themore reasonable choicewith a building this size to reduce thewire sizes andpower consumption. Exact reasoning behind the choice of 208Y/120V over 480Y/208V wasrequiredfromthecontractor.EmergencypowersystemTheactualfuelandpowersourcefortheemergencypowersystemisdiesel,sameasexpected.Thesizeof thegenerator is sufficient for theconnectedbuilding loads.The loadsconnectedmeet theIBCemergencyrequirements.Theoptionalback-uploadsforsumppumpsandejectorpumpswerenotexpected,butmakesensefortheactualdesign.


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GeneralequipmentAs mentioned in the building utilization voltage section, information is requested regarding thechoiceof208Y/120Vinsteadof480Y/120V. Theutilizationvoltagelimitedtheequipmentchoiceforlighting,HVAC,andotherequipment.Asidefromthepotentialproblemresultedfromtheutilizationvoltage,theoverallequipmentchoiceto serve the building is appropriate and compatible. The choice for conductors, conduit, andreceptacles is industrial standard for this type of building. Because of the busy urban site of theproject, the choice of indoor electrical equipment is very reasonable. Spare spaces on thepanelboard and switchboard allow for flexibility and future expansion. The cogeneration systemimplementedisenergyefficientandcostsaving.Optionalback-uppowerandUPSsystemAsmentioned in theemergencypowersystemsection, thecurrentdesign foroptionalback-up israther reasonable. The loads, feed by UPS system in case of power outage, are rather industrialstandard.Thus,theoptionalback-uppowerandUPSsystemdesignispractical.CostreductiontechniquesUsing higher quality equipmentmay increase the initial cost and reduce the long term cost. Asdiscussed in part 1, cost overall has a rather low propriety. However,with higher efficiency andlong-lastingequipment,thebuildingwillencounterlessproblemsinthefutureandalsosavecostlongterm.

SystemsintegrationTheentirebuildingsystemdesigned israther integrated,operateswithBMSviaBACnet.Buildingsystemequipmentsuchasventilation, lighting,powersystems, firesystems,andsecuritysystemscanbecontrolledandoverrideatacentrallocation.

EnergycostsavingsandenergyreductiontechniquesThebuildingusescogenerationforheatandpowergenerationandmeetsLEEDpowerconsumptionrequirementinattempttoachieveLEEDgold.As the building is located at a busy downtown area,with tall buildings around, itmay not seemworth tousePVarrayorwindgeneration.Asapublicmuseum, thecomfort-abilityof thegalleryspaceshouldstayratherconstant.Demandreductionandshiftingmaybereasonableinspacessuchasopenofficeareasinthebuilding.

chang liu | lighting + electrical m.a.e./b.a.e. …...2702.2.6 accessible means of egress platform...

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