ASHRAE.HandBook_24-2008 MECHANICAL DEHUMIDIFIERS AND RELATED COMPONENTS

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1、RelatedCommercialResourcesCHAPTER24MECHANICALDEHUMIDIFIERSANDRELATEDCOMPONENTSMechanicalDehumidifiers.............................................................................................................24.1InstallationandServiceConsiderations..........

2、.............................................................................24.7WraparoundHeatExchangers.......................................................................................................24.7THEcorrectmoisturelevelintheairisimportantforhea

3、lthandcompressoronacallforsensiblecooling.Typically,aroomcomfort.ControllinghumidityandcondensationisimportantdehumidifierhasanSHRof0.6orless,comparedtoastandardair-topreventmoisturedamageandmoldormildewdevelopment,thusconditioningsystemof0.8SHR.Dehumidifiersm

4、ustalsoallowprotectingbuildingsandoccupants,andpreservingbuildingcon-condensationfromthecoolingcoiltodraineasilyfromthecoils.tents.ThischaptercoversmechanicaldehumidificationusingaTheymayneedairvelocitiesoverthecoolingcoillowerthanthosecoolingprocessonly,inclu

5、dingbasicdehumidifiermodels(withforatypicalairconditioner,toimprovemoisturerunoffandmini-moistureremovalcapacityoflessthan1.4kg/h)usedforhomemizecarryoverofcondensedmoisture.basementsandsmallstorageareas,aswellaslargersizesrequiredInaddition,theneedtointroduce

6、code-mandatedventilationairforcommercialapplications.Othermethodsofdehumidificationmayrequirethatoutsideairbetreatedtoavoidintroducingexces-arecoveredinChapter23.sivemoisture.Basicstrategiesincludeprecoolingoutsideairenter-Commercialapplicationsformechanicalde

7、humidifiersincludeingtheair-conditioningevaporatorcoil,orprovidingaseparatethefollowing:systemtoprovideproperlyconditionedoutsideair.Forsomelow-dew-point(below7°C)applications,mechanicaldehumidification•Indoorswimmingpoolsmaybeusedasthefirststage,withdesiccant

8、dehumidificationfor•Makeupairtreatmentthefinalstagetomaximizeefficiencyandminimizeinstalledcost.•IcerinksAlthoughthemainpurposeofamechanicaldehumidifieristo•Drystorageremovemoistur