ASHRAE.AT-01-7-5-2001 Ceiling Radiant Cooling Panels as

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1、AT-01-7-5CeilingRadiantCoolingPanelsasaViableDistributedParallelSensibleCoolingTechnologyIntegratedwithDedicatedOutdoorAirSystemsChristopherL.ConroyStanleyA.Mumma,Ph.D.,P.E.AssociateMemberASHRAEFellowASHRAEABSTRACTseveralavailablesensiblecoolingtechnologiessuitableforoperationinparalle

2、lwithadedicatedoutdoorairsystem.OnceEmphasisisplacedupontheintegrationofceilingradiantthedecisionismadetouseadedicatedoutdoorair(OA)panelcoolingtechnologywithotherbuildingmechanicalsystem(Mumma2001),itisonlyasmallmigrationsteptosystemsinthispaper.Applicableradiativeandconvectiveheatcon

3、ditionthatairsufficientlytomeetalloftheOAlatentastransferequationsareappliedtoillustratetheratesofheatwellasallofthespacelatentloads.Adedicatedoutdoorairremovalthatarerepresentativeofthistechnology.Alsosystem(DOAS)thatefficientlysuppliescooldryOAispresentedarethefundamentalheattransfer

4、equationsthatdiscussedindetailinapaperbyMummaandShank(2001).governtheradiantcoolingpanelmeantemperatureasafunc-Withnolatentloadsremaininginthespace,technologiessuchtionofgeometry,materials,flowrates,coolanttemperature,asCRCPcoolingcanbeconfidentlyappliedwithoutconcernandspacetemperatur

5、es.Thesefundamentalsarethenillus-forcondensation.WhileCRCPcoolinghasseenverylimitedtratedbyasimpleexamplewheretheradiantpanelsareinte-applicationintheU.S.,Europeanshavesuccessfullyappliedgratedwithadedicatedoutdoorairsystemcapableofitforoverfifteenyears.Condensationoncoolingpanelmainta

6、iningthespacedew-pointtemperatures.Inthiscontext,surfacesisnotaproblemwhenthepanelsurfacetemperaturetheradiantpanelshavenodehumidificationduty,andconden-ismaintainedabovethespacedew-pointtemperature.sationwillnotformonthesurfaces.Theillustrationcoverseachoftheiterativestepsrequiredtose

7、lecttheceilingradiantCRCPsarecommerciallyavailableinalinearormodularcoolingpanelsandasimplisticanalysisoftheresultingformtofitwellintoasuspendedceilinggrid.Thepanel’sfinseconomicbenefits.Thepaperwrapsupwithadetaileddiscus-areconstructedmainlyofeitheraluminumorcopper.Coppersionofthefu