【英文标准名称】:Naturalgas-Calculationofcompressionfactors-Introductionandguidelines
【原文标准名称】:天然气.压缩因数的计算.介绍和指南
【标准号】:BSISO12213-1-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-04-15
【实施或试行日期】:1998-04-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:天然气;质量;热力学;文献索引;成份允差;压缩气体;热力学性质;管道;测量特征;准确度;化学成分;数学计算;热值;相对密度
【英文主题词】:Calculatingmethods;Compacting;Compressedgas;Compression;Concentration(chemical);Conglomerates;Definition;Definitions;Entries;Gasmixtures;Generalconditions;Materialstesting;Mathematicalcalculations;Naturalgas;Realgasfactors
【摘要】:ThisInternationalStandardspecifiesmethodsforthecalculationofcompressionfactorsofnaturalgases,naturalgasescontainingasyntheticadmixtureandsimilarmixturesatconditionsunderwhichthemixturecanexistonlyasagas.Thestandardisinthreeparts:part1givesanintroductionandprovidesguidelinesforthemethodsofcalculationdescribedinparts2and3.Part2givesamethodforusewherethedetailedmolarcompositionofthegasisknown.Part3givesamethodforusewherealessdetailedanalysis,comprisingsuperiorcalorificvalue(volumetricbasis),relativedensity,carbondioxidecontentand(ifnon-zero)hydrogencontent,isavailable.Bothmethodsareapplicabletodrygasesofpipelinequalitywithintherangeofconditionsunderwhichtransmissionanddistribution,includingmeteringforcustodytransferorotheraccountingpurposes,arenormallycarriedout.Ingeneral,suchoperationstakeplaceattemperaturesbetweenabout263Kand338K(approximately-10℃to65℃)andpressuresnotexceeding12MPa(120bar).Withinthisrange,theuncertaintyofpredictionofbothmethodsisabout±0.1%providedthattheinputdata,includingtherelevantpressureandtemperature,havenouncertainty.NOTE—PipelinequalitygasisusedinthisInternationalStandardasaconcisetermforgaswhichhasbeenprocessedsoastobesuitableforuseasindustrial,commercialordomesticfuel.Althoughthereisnoformalinternationalagreementuponthecompositionandpropertiesofagaswhichcomplieswiththisconcept,somequantitativeguidanceisprovidedin5.1.1.Adetailedgasqualityspecificationisusuallyamatterforcontractualarrangementsbetweenbuyerandseller.Themethodgiveninpart2isalsoapplicable(withincreaseduncertainty)tobroadercategoriesofnaturalgas,includingwetorsourgases,withinawiderrangeoftemperaturesandtohigherpressures,forexampleatreservoirorundergroundstorageconditionsorforvehicular(NGV)applications.Themethodgiveninpart3isapplicabletogaseswithahighercontentofnitrogen,carbondioxideorethanethannormallyfoundinpipelinequalitygas.Themethodmayalsobeappliedoverwiderrangesoftemperatureandpressurebutwithincreaseduncertainty.Forthecalculationmethodsdescribedtobevalid,thegasmustbeaboveitswaterandhydrocarbondewpointsattheprescribedconditions.Thestandardgivesalloftheequationsandnumericalvaluesneededtoimplementbothmethods.Verifiedcomputerprogrammesareavailable(seeannexB).
【中国标准分类号】:E24
【国际标准分类号】:75_060
【页数】:20P.;A4
【正文语种】:英语


【英文标准名称】:Measuringrelaysandprotectionequipment-Part151:Functionalreuirementsforover/undercurrentprotection
【原文标准名称】:测量继电器和保护设备.第151部分:过/欠电流保护的功能要求
【标准号】:IEC60255-151-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC95
【标准类型】:()
【标准水平】:()
【中文主题词】:连接;触点;定义(术语);接地漏电;电气工程;电绝缘;电气保护设备;作标记;测量继电器;机械性能;过电流保护;精密度;保护设备;额定值;继电器;安全工程;规范(验收);测试;热测量
【英文主题词】:Connections;Contact;Definitions;Earthleakage;Electricalengineering;Electricalinsulation;Electricalprotectionequipment;Marking;Measuringrelays;Mechanicalproperties;Overcurrentprotection;Precision;Protectiondevices;Ratings;Relays;Safetyengineering;Specification(approval);Testing;Thermalmeasurement
【摘要】:
【中国标准分类号】:L25
【国际标准分类号】:29_120_70
【页数】:63P;A4
【正文语种】:英语