hvacterms空调专业用语

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1、HVACTermsABSOLUTEHUMIDITYTheweightofwatervaporinagivenamountofair.GrainspercubicfootorlbswaterpercubicfootairABSOLUTEPRESSUREPressuremeasuredwithabaseofzero.ABSOLUTETEMPERATUREAtemperaturescaleexpressedindegreesF0orC0usingabsolutezeroasabase.Referredtoas

2、theRankinorKelvinscale.ABSOLUTEZEROThetemperatureatwhichmolecularactivitytheoreticallyceases.-456.69F0or-273.16C0AIRCONDITIONINGTheprocessofcontrollingthetemperature,humidity,cleanlinessanddistributionoftheair.AIRFLOWThedistributionormovementofair.AIRHAN

3、DLINGUNIT(AHU)Equipmentwithaheatingelementand/orcoolingcoilandothercomponentsinacabinetorcasing.AIRBALANCINGAdjustinganairconditioningsystemsothattherightamountofairisdeliveredtotherightplacesinyourhomeinordertoachievetherightheatingorcoolingeffect.AIRBA

4、LANCETESTAtestusedtomeasureairflowacrossatowerorairhandlersystem.AIR,STANDARDCONDITIONSConditionsatwhichBTUratingsforsummerairconditioningequipmentisrated.95F0drybulb,75F0wetbulbatthecondenserinletand80F0drybulb,67F0wetbulbattheevaporatorinlet.AMPTheprac

5、ticalmeter-kilogram-secondunitofelectriccurrentthatisequivalenttoaflowofonecoulombpersecondortothesteadycurrentproducedbyonevoltappliedacrossaresistanceofoneohm.AMBIENTReferstothetemperaturesurroundingabodyorunitundertest.ARIAirConditioningandRefrigerati

6、onInstituteATMOSPHERICPRESSURETheweightofa1squareinchcolumnoftheearth'satmosphere.Atsealevelthispressureis14.696poundspersquareinch.BIMETALTwometalswithdifferentratesofexpansionfastenedtogether.Whenheatedorcooledtheywillwarpandcanbemadetoopenorcloseaswit

7、chorvalve.BOILINGPOINTThetemperatureatwhichtheadditionofanyheatwillbeginachangeofstatefromaliquidtoavapor.BRITISHTHERMALUNIT(BTU)Theamountofheatnecessarytochangethetemperatureof1poundofpurewater1degreeFahrenheit(oF).Btuh:Britishthermalunitsperhour.MBH:10

8、00Britishthermalunits/hourCAPILLARYTUBEArefrigerantcontrolconsistingofasmalldiametertubewhichcontrolsflowbyrestriction.Theyarecarefullysizedbyinsidediameterandlengthforeachparticularapplication.CENTIGRADEAtemperaturescalew