ISO 4174-1998 谷物、油籽和豆类单维气流通过粮堆的单位压力损失的测量

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【英文标准名称】:Cereals,oilseedsandpulses-Measurementofunitpressurelossinone-dimensionalairflowthroughbulkgrain
【原文标准名称】:谷物、油籽和豆类单维气流通过粮堆的单位压力损失的测量
【标准号】:ISO4174-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-02
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC34
【标准类型】:()
【标准水平】:()
【中文主题词】:食品;试验;压头损失;谷类作物;空气流动;颗粒;含油种子;豆科;豆科作物;植物制品
【英文主题词】:Airflow;Cereals;Foodproducts;Grains;Headlosses;Leguminosae;Oilseeds;Plantproducts;Pulses(crops);Testing
【摘要】:ThisInternationalStandardspecifiesamethodofmeasuringunitpressurelossinone-dimensionalairflowthroughbulkgrain,permittingcalculationofthetotalpressurelossofaventilationunit.Thisisequaltothesumofthepressurelossesa)intheventilationsystem(ducts,etc.);b)inthegrain(whichisthesubjectofthisInternationalStandard);c)duetothepassageoftheairfromtheductintothegrain.Thepressurelossesintheventilationsystemandthoseduetothepassageoftheairfromtheductintothegraincanbeconsideredasnegligibleinrelationtothepressurelossesinthegrainiftheairflowvelocitydoesnotexceedthefollowinglimits:—8m/sto10m/sinthemainduct;—4m/sto5m/sinthesecondaryduct;—0,25m/swhenenteringthegrain.If,foreconomicreasons,airvelocitiesarehigherthanthoseindicatedabove(upto30m/sinthemainduct),then,followingpertinentliterature,thepressurelosscausedbytheairdistributinganddischargingsystemhastobecalculated.
【中国标准分类号】:B20
【国际标准分类号】:67_060;67_200_20
【页数】:8P.;A4
【正文语种】:英语