化学英语证书考试(pec)化工技术术语解释

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1、化学英语证书考试（PEC）-化工技术术语解释GasVolumeTheamountofairorgasintakeinaparticulartimeunitm3/min、CMM：gasvolumeper1minutem3/h、CMH：gasvolumeper1hourm3/min、CFM：gasvolumepermin=cubicfeet(usedofteninAmerica) 　　　　　　　　　1f3/min＝0.0283m3/minNm3/min：gasvolumeundernormalcondition

2、s(0℃,humidity0%,intakeabsolutepressure760mmHg)Convertintothegastemperature.CalculationisbelowQt：convertedgastemperaturet℃gasvolume QN：requestedgasvolumeundernormalconditionsStaticPressuremmAq：Aunitshowninheightwhenthewaterpumpedinorup Aq=Aqua(water)abbrevi

3、ation.Waterspoutinmillimeters(writtenasmmH2O) inH2O：Ifnotinmillimeters,writtenininches.(usedofteninAmerica)1inch＝25.4mmPa：Pascal(Internationalunitformeasuringpressure)1mmAq＝9.80665Pakgf/m2：1kgf/m2＝1mmAqbar：bar(Europeanunitformeasuringpressure)1bar＝10.197mA

4、q、1mbar＝10.197mmAqShaftPowerThemeasureofpowerusedattheshaftofthefan.ShaftpowerismeasuredinkW.RevolutionSpeedrpm、（R/M）、min-1：revolutionper1minuteGasSpecificWeightkg/m3：WeightperunitvolumeofgasGenerally1.2kg/m3ismostcommonundernormalconditions(20℃,relativehu

5、midity65%,andabsolutepressures760mmHg) Thespecificweightofthegaschangesduetotemperaturevariations.Thechangeinthespecificweightofthegasduetotemperatureiscalculatedasfollows.：Specificweightofgasattemperaturet℃ofgaskg/m3：Specificweightofgasin0℃temperatureofga

6、skg/m3ConversionaffectedinspecificweightvolumeperformanceAlltheperformancelabelsinthefancatalog(capacitychart)aredisplayedbythenormalatmospheric conditions.Therefore,specificweightbecomes1.2kgf/m3.Usuallyundergeneralatmosphericconditionthereisnoproblembutw

7、henspecificweightofthegasdiffersby alargeamountitisnecessarytorefertothecapacityrangechart.Thisconversioniscalculatedasfollows(1)StaticPressureSSp＝Theactualstaticpressurefoundinaparticularsituation(staticpressurerequiredbythecustomer)mmAqSp'：Staticpressure

8、asshownseenincapacityrangechartmmAq：Thespecificweightofthegasused(2)ShaftPowerLB：ActualshaftpowerkWLB'：Shaftpowerasshowninthecapacityrangechart：Specificweightofgasbeingusedkg/m3Conversionaffectedinrotationspe