TRNSYS Temperature Level Control Tutorial

TemperatureLevelControlTutorial
Itiscommonlydesiredtomodelabuildingintemperaturelevelcontrolfromenergyratecontrol.
ThistutorialdemonstrateschangingtheTRNSYSRestaurantExamplefromenergyratecontrolto
temperaturelevelcontrol.Therearefourimportantstepstoimplementtemperaturelevelcontrol:
turningofftheinternalheatingandcoolinginType56,definingtheinputs,definingtheoutputs,and
connectingthepropermechanicalcomponentsintheSimulationStudio.Thistutorialwillguide
througheachofthesteps.
OpentheRestaurant.tpfexampleprojectintheSimulationStudiofromtheTRNSYSExamples
directory.RightclickontheType56componentandclick‘EditBuilding’.Atthispointitis
recommendedthattheprojectandbuildingaresavedasdifferentnames(File
Æ Saveas).Inthe
TRNBuildManagerwindow,openthezone,DINING.OpentheHeatingbutton,andclicktheoff
buttonasshowninFigure1.ThisactionremovestheTRNBUILDinternalheatingsettingforthezone.
Theinternalcoolingforthezoneisalreadyoff,buttheinternalcoolingandheatingfortheotherzone,
KITCHEN,needstobeturnedoff.
Figure1:HeatingforDiningRoomZone
IntheTRNBuildManagerwindowopenthezone,KITCHEN.OpentheHeatingbutton,andclicktheoff
buttonasshowninFigure2.Thesameneedstobedonefortheinternalcoolingsettingforthezone
asshowninFigure3.

Figure2:HeatingforKitchenZone
Figure3:CoolingforKitchenZone
ThenextsteptoachievetemperaturelevelcontrolistocreatethenecessaryinputsforType56in
TRNBuild.OpentheVentilationTypeManagerfromthemenubar(Typemanager
Æ Ventilation).Only
theventilationforthekitchenzonehasbeenpreviouslydefinedasshowninthedropdownmenuin
theVentilationTypeManager(Figure4).InsteadofdefiningtheventilationbyascheduleasinFigure
4,clickonthebluearrowinAirchangeofVentilation.

Figure4:KitchenZoneVentilationPriortoDefiningInput
ClickontheInputbuttonratherthantheSchedulebutton(Figure5).
Figure5:DefiningVentilationasanInputintoType56
Anewinputmaybecreatedbyusingthedrop‐downmenuandclickingon‘ Å new…’(Figure6).

Figure6:CreatingaNewInputforVentilation
DefinethenewinputasM_DOT_KITCHinthepop‐upwindowandpresstheOKbutton(Figure7).
Figure7:NamingtheNewInputforVentilation
Itisextremelyvitaltonotethattheventilationisrateisanairchangeofventilation(1/hr).Toconvert
theTRNSYSflowrateunitsofkg/hrtoairchangesofventilation,multiplybytheinverseofthe
productofthedensityofairandthezonevolume(Equation1).
  (1)
Inthecaseofthekitchenzonewithavolumeof168.75m3andassumingthatairhasadensityof1.20
kg/m3,themultiplierfortheinputmassflowratewouldbeabout0.005asshowninFigure8.
Alternatively,anexternalequationmaybeusedintheSimulationStudiofortheconversion.
Figure8:UsingaMultipliertoConvertInputMassFlowRate
PresstheOKbuttontogobacktotheVentilationTypeManagerforthekitchenzone.The
TemperatureofAirFlowandtheRelativeHumidityofAirFlowalsoneedtobedefinedasinputs.Using

thepreviousprocesstodefineinputs,createanewinputfortheinlettemperatureandrelative
humiditytothekitchenzonecalledT_IN_KITCHandRH_IN_KITCH,respectively.TheVentilationType
ManagerforthekitchenzoneshouldlooklikethatinFigure9.
Figure9:InputsfortheKitchenZoneVentilation
Thesamesetofinputsneedstobedefinedforthediningroomzone.Tocreateanewventilation
type,simplyclickontheNinthegreenboxofthelowerrighthandoftheVentilationTypeManager
window(Figure10).Addinganewventilationtypemayalsobedonebyclickingonthezonenamein
theTRNBuildManager,clickingontheVentilationiconbuttonintheRegimeData,andthenaddinga
newventilationtype.
Figure10:NewVentilationTypeButton
Namethenewtype,DININGandclicktheNewbutton(Figure11).