MOLLIER DIAGRAM.ppt

MOLLIERDIAGRAMDewPoint-TdpTheDewPointisthetemperatureatwhichwatervaporstartstocondenseoutoftheair,-pointtemperatureisclosetotheairtemperature,therelativehumidityishigh,andifthedewpointiswellbelowtheairtemperature,therelativehumidityislow. ,-%-BulbTemperature-TdbDrybulbtemperatureisusuallyreferredtoasairtemperature,,-bulbtemperature-Tdb,---BulbTemperature--%relativehumidityintheair(theairisatthesaturationline).OntheMollierdiagram,thewet-bulblinesslopealittleupwardtotheleft(dottedlines).HeatingofAirCoolingandDehumidfyingAirMixingofAirofdifferentConditionsTheheatbalanceforthemixcanbeexpressedas:LAhA+LChC=(LA+LC)hB   where L=mixingrate h=enthalpyoftheair Themoisturebalanceforthemixcanbeexpressedas:LAxA+LCxC=(LA+LC)xB     wherex=,AddingSteamorWater(liquid)hartisavariantoftheMollierdiagramusedinsomepartsoftheworl