电脑桌面
添加小米粒文库到电脑桌面
安装后可以在桌面快捷访问

冷凝水管路尺寸计算VIP免费

冷凝水管路尺寸计算_第1页
1/7
冷凝水管路尺寸计算_第2页
2/7
冷凝水管路尺寸计算_第3页
3/7
ThecondensatepipesizingchartThecondensatepipesizingchart(Figure14.3.5)canbeusedtosizeanytypeofcondensateline,including:Drainlinescontainingnoflashsteam.Linesconsistingoftwo-phaseflow,suchastrapdischargelines,whichareselectedaccordingtothepressureseithersideofthetrap.Thechart(Figure14.3.5):Worksaroundacceptableflashsteamvelocitiesof15-20m/s,accordingtothepipesizeandtheproportionofflashsteamformed.Canbeusedwithcondensatetemperatureslowerthanthesteamsaturationtemperature,aswillbethecasewhenusingthermostaticsteamtraps.Isusedtosizetrapdischargelinesonfull-loadconditions.Itisnotnecessarytoconsideranyoversizingfactorsforstart-uploadortheremovalofnon-condensablegases.Mayalsobeusedtoestimatesizesforpumpedlinescontainingcondensatebelow100°C.ThiswillbediscussedinTutorial14.4.Fig.14.3.5CondensatepipesizingchartUsingthecondensatepipesizingchart(AlsoavailableinAppendix14.3.2)Establishthepointwherethesteamandcondensatepressuresmeet(lowerpartofthechart,Figure14.3.5).Fromthispoint,moveverticallyuptotheuppercharttomeettherequiredcondensaterate.Ifthedischargelineisfalling(non-flooded)andtheselectionisonorbetweenlines,choosethelowerlinesize.Ifthedischargelineisrising,andthereforelikelytobeflooded,choosetheupperlinesize.Note:Thereasoningemployedforthesizingofasteamtrapisdifferenttothatusedforadischargeline,anditisperfectlynormalforatrapdischargelinetobesizeddifferenttothetrapitisserving.However,whenthetrapiscorrectlysized,theusualancillaryequipmentassociatedwithasteamtrapstation,suchasisolationvalves,strainer,traptestingchamber,andcheckvalve,canbethesamesizeasthetrappingdeviceselected,whateverthedischargelinesize.Asteamtrappassingafull-loadof1000kg/hat6bargsaturatedsteampressurethroughafallingdischargelinedowntoaflashvesselat1.7barg.Asthedischargelineisnon-flooded,thelowerfigureof25mmisselectedfromthechart(Figure14.3.5).Fig.14.3.6Anon-floodedpressurisedtrapdischargeline(refertoExample14.3.3)Asteamtrappassingafull-loadof1000kg/hat18bargsaturatedsteampressurethroughadischargelinerising5muptoapressurisedcondensatereturnlineat3.5barg.Addthe0.5barstaticpressure(5mhead)tothe3.5barcondensatepressuretogive4bargbackpressure.Asthedischargelineisrisingandthusflooded,theupperfigureof32mmisselectedfromthechart,(Figure14.3.5).Fig.14.3.7Afloodedtrapdischargeline(refertoExample14.3.4)Asteamtrappassingafull-loadof200kg/hat2bargsaturatedsteampressurethroughaslopingdischargelinefallingdowntoaventedcondensatereceiveratatmosphericpressure(0barg).Asthelineisnon-flooded,thelowerfigureof20mmisselectedfromthechart,(Figure14.3.5).Fig.14.3.8Anon-floodedventedtrapdischargeline(refertoExample14.3.5)Apump-trappassingafull-loadof200kg/hat4bargsaturatedsteamspacepressurethroughadischargelinerising5muptoanon-floodedcondensatereturnlineatatmosphericpressure.The5mstaticpressurecontributesthetotalbackpressureof0.5barg.Asthetrapdischargelineisrising,theupperfigureof25mmisselectedfromthechart,(Figure14.3.5).Fig.14.3.9Afloodedtrapdischargeline(refertoExample14.3.6)Consideracondensateloadof200kg/htoareceiverandpump.Thepumpdischargerateforthismechanicaltypepumpistakenassixtimesthefillingrate,hence,thecondensateratetakenforthisexampleis6x200=1200kg/h.Becausethecondensatewillhavelostitsflashsteamcontenttoatmosphereviathereceivervent,thepumpwillonlybepumpingliquidcondensate.Inthisinstance,itisonlynecessarytousethetoppartofthechartinFigure14.3.5.Asthelinefromthepumpisrising,theupperfigureof25mmischosen.Note:Ifthepumpedlinewerelongerthan100m,thenextlargersizemustbetaken,whichforthisexamplewouldbe32mm.Ausefultipforlinesof100morlessistochooseadischargepipewhichisthesamesizeasthepump.ForfurtherdetailsrefertoTutorial14.4'Pumpingcondensatefromventedreceivers'.

1、当您付费下载文档后,您只拥有了使用权限,并不意味着购买了版权,文档只能用于自身使用,不得用于其他商业用途(如 [转卖]进行直接盈利或[编辑后售卖]进行间接盈利)。
2、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。
3、如文档内容存在违规,或者侵犯商业秘密、侵犯著作权等,请点击“违规举报”。

碎片内容

冷凝水管路尺寸计算

确认删除?
VIP
微信客服
  • 扫码咨询
会员Q群
  • 会员专属群点击这里加入QQ群
客服邮箱
回到顶部