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EfrelJohnManlapaz
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KimberlyDugan
ChilledWaterAir-conditioningSystem
Systemsthatemploywaterchillersarecommonlycalledchilled-
watersystems.Asitsnamesuggest,thissystemmakesuseofwaterasits
secondaryrefrigerant.Chillerisusedtoremoveheatfromthewaterwhichis
thencirculatedthroughothercomponentstoabsorbheatfromthespace.
Chilledwaterairconditioningsystemsarecommonlyusedin
applicationsthatneedlargecoolingcapacitysuchashypermarket,industrial
process,commercialairconditioningsuchasofficesandfactories.Moreand
morehomesareusingthissystemtoairconditionedtheirentirehouse
becauseofitscost-effectivenessandnohazardofhavingrefrigerantpiped
alloverthehouse.
Howitconditionedatmosphericair?
Inachilled-watersystem,theentireairconditionerisinstalledonthe
rooforbehindthebuilding.AWaterchillercoolswatertobetween40and45
degreesFahrenheit(4.4and7.2degreesCelsius).Thechilledwateristhen
pipedthroughoutthebuildingandconnectedtoairhandlers.Thiscanbea
versatilesystemwherethewaterpipesworkliketheevaporatorcoilsina
standardairconditioner.Ifitswell-insulated,theresnopracticaldistance
limitationtothelengthofachilled-waterpipe.
PartofaWaterChilledAir-cond.System:
WaterChiller
Adevicethatremoves
heatfromaliquidviaavapor-
compressionorabsorption
refrigerationcycle.Thiscooled
liquidflowsthroughpipesina
buildingandpassesthrough
coilsinairhandlers,fan-coil
units,orothersystems,cooling
andusuallydehumidifyingthe
airinthebuilding.Chillersare
oftwotypes;aircooledorwater
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