NF V04-221-5-2002 牛奶.氮含量的测定.第5部分:蛋白质氮含量的测定

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【英文标准名称】:Electricitymeteringequipment(a.c.)-Particularrequirements-Part21:staticmetersforactiveenergy(classes1and2).
【原文标准名称】:电量计量设备(交流电).特殊要求.第21部分:有效能量静态电度表(1和2级)
【标准号】:NFC44-104-2003
【标准状态】:作废
【国别】:法国
【发布日期】:2003-06-01
【实施或试行日期】:2003-06-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:有功电流;电度表;电度表;电子测量装置;规范(验收);交流瓦特电度表;测量仪器;电气工程;交流电流;计数器;电能;能量测量;电流表;静态的
【英文主题词】:Activecurrent;Alternatingcurrent;Alternating-currentmeters;Counters;Currentmeters;Electricenergy;Electricalengineering;Electricitymeter;Electricitysupplymeters;Electronicmeasuringdevices;Energymeasurement;Measuringinstruments;Metersforactiveenergy;Specification(approval);Static
【摘要】:
【中国标准分类号】:N21
【国际标准分类号】:91_140_50
【页数】:26P.;A4
【正文语种】:其他


【英文标准名称】:ClosedFeedwaterHeaters
【原文标准名称】:密封供水加热器
【标准号】:ASMEPTC12.1-2000
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国机械工程师协会(US-ASME)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;测量仪器;定义;性能;效率;数学计算;规格试验;水加热器;供水加热器;不确定性;测量;试验结果
【英文主题词】:Definition;Definitions;Efficiency;Feedwaterheaters;Mathematicalcalculations;Measurement;Measuringinstruments;Performance;Ratingtests;Testresults;Testing;Uncertainty;Waterheaters
【摘要】:ThisCodeprovidestheprocedures,direction,andguidancefordeterminingtheperformanceofclosedfeedwaterheaterswithregardtothefollowing:(a)TerminalTemperatureDifference(TTD),whichisthedifferencebetweenthesaturationtemperaturecorrespondingtothesteaminletpressureandthefeedwateroutlettemperature;(b)DrainCoolerApproach(DCA),whichisthedifferencebetweendrainoutlettemperatureandfeedwaterinlettemperature;(c)Tubeside(feedwater)pressurelossthroughtheheater;and(d)Shellsidepressurelossthroughthedesuperheatingzone,andthroughthedraincoolingzone.ThisCodeappliestoallhorizontalandverticalheatersexceptthosewithpartialpassdraincoolingzones.Designswithpartialpassdraincoolingzonesarehorizontalheaterswithsubmergeddraincoolingzones,andverticalchannel-upheaterswithdraincoolingzones.Inthosedesigns,onlyaportionofthefeedwaterpassesthroughthedraincoolingzones;therefore,therearetwofeedwaterflowstreamswithdifferenttemperatureprofiles.Afeedwaterheaterisdesignedtoaccomplishheattransferbetweenfluids.Theheaterdesignisbasedonaspecificoperatingconditionthatincludesflow,temperature,andpressure.Thisspecificconditionconstitutesthedesignpointthatisfoundonthemanufacturer'sfeedwaterheaterspecificationsheet.Itisnotfeasibletoexpectthatthetestwillbeconductedatthedesignpoint.Therefore,itisnecessarytopredicttheheaterperformancebyadjustingthedesignparametersforthetestconditions.MethodsofcalculatingthepredictedheaterperformancearepresentedintheCode.Thesepredictedvaluesshallthenbecomparedtocorrespondingmeasuredtestvalues.
【中国标准分类号】:J96
【国际标准分类号】:91_140_65
【页数】:88P.;A4
【正文语种】:英语