冷水空调系统的基本原理.pdf

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AljonAltiche

EfrelJohnManlapaz

RomyrickGliponeo

EmanoelBrimon

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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