泵供水系統(tǒng)水錘防護(hù)及節(jié)能研究.pdf

1、Y1050740分類號(hào)UDC密級(jí)學(xué)號(hào)B9910澎拐多孽歹矢挈博士學(xué)位論文泵供水系統(tǒng)水錘防護(hù)及節(jié)能研究學(xué)科名稱：學(xué)科門類：指導(dǎo)教師：朱滿林水文學(xué)及水資源申請(qǐng)日期：2007年2月ResearchonWaterHammerPreventionandEnergySavingofPumpingWaterSupplySystemSubject：Hydro坦夥ann。dWaterResourcesAuthor：勿配嬲h，l覷Adviser：嘞豸砒Ab

2、stractDate：嘲≥，PChinais‘notrichinwaterresourcesThewaterresourceamotmtpercapitaissmallandtheresourcedistributionisseriouslyunevenbothintemporalandspatialoverthecountryEveryyearChinasuffersseriouslydamageinindustryandagricu

3、ltureforshortageofwaterW弧讎economicdevelopmentChinahasbuiltmanypumpingstationworksWaterhamlnercandogreatharmtopumpingwatersupplysystemEnergysavingofpumpingstationisthemainmethodt0reducethecostofwatersupplyThereforewaterha

4、mmerpreventionandenergysavingofpumpingwatersupplysystemarethemaintopicsofthis咖dyThemajorcontentsareasfollows：(1)Hydraulictransientprocessesoftwopumpsetsinahighliftpumpingstationwereseparatelymeasuredbymodemtestingtechnol

5、ogywhentwopumpsetsaccidentallybecloseddownHydranlietransientcalculationwasconductedbyusingmethodofcharacteristicswithtestwavespeedandclosedownprocedureofbutterflyvalveusedasparametersTheresultsofcalculationandtestarewell

6、matchedThereforethecloseprocedureofbutterflyvalvescallbeoptimizedAccordingtoformulainexistence，waterhammerWaVevelocityis1041m／sinpressureconduitand32133trgsinPPRpipewhichis12％lessthanthetestspeed1178m／s，and26％lessthanthe

7、testspied435Olm／srespectively(2)AccordingtoresearchoneffectsofcharacteristicsofairvalveonhydraulictransienttheconceptofairvalvegroupandmethodofwaterhammerprotectionbysetsofvalvesareputforwardInstallationsiteandoptimumpar

8、ametersofairvalvesusedtopreventwaterhammerinalongdistancewatersupplypipelinearepresented(3)Predictivelinearregressivemodelofthecompletecharacteristiccurvesofcentrifugalpumpsisputforwardbyusingspecificspeedlkrelativeflowa

9、ngle，andthecompletecharacteristicparametersofzeroflowrateasindependentvariablesCorrelationanalysisshowsthatthemodelisreasonable(g)Dynamicprogrammingmodelabouteconomicoperationofamultistagepumpingstationwhichhasnowaterdiv

10、ersionbetweeneachstage，iSestablished，andtheoptimumoperationscheduleofpumpingstationsisalsogivenItissuggestedthataddingbothsmallerpumpsandreturnpipesforeachstationisthemostsuitabletechnicalalterationplanOptimumoperatingpu