简介:1.We,therepresentativesofnationalandlocalgovernments,representativesofutilitiesandtheprivatesector,UnitedNationsagencies,multilateralfinancialinstitutions,otherinternationalorganizations,non-governmentorganizations,thescientificcommunityandacademia,andinternationalindustryassociations,
简介:Chinabearsahighreliefinthewestandlowintheeast,withcomplextopography,totaling2/3ofthewholecountry'sareaformountains,hillyregionsandzigzagplateaus.Thereforethehydraulicresourcesareabundant,withpotentialhydraulicamountofabout680000MW,ofwhich,smallhydropowerresourceisveryrichtooandhasgreatexploitablepotential.Accordingtogeneralinvestigationinearly1980s,theexploitableamountreached87000MW,rankingthetopintheworld.
简介:Inthispaper,amodifiedκ-εturbulencemodel,asimplifiedalgebraicstressmodelandadevelopedtwo-fluidmodelhavebeenpresentedbasedonnumericalmodelingofturbulentbuoyantrecirculatingflows.Thecalculatedresultsbythesemodelsareingoodagreementwithexperiments.However,thelastmodelismuchbetterforsimulatinggravity-stratifiedflows.
简介:Installationofahydraulicturbineinawaterdistributionsysteminvolvinglongpipelinereachesrequiresseveraluniquedesignconsiderations.Forafixedspeedunit,theselectionofdesignpointsforheadandflowneedstobeoptimizedtoprovideanoperatingenvelopethatwouldmaximizethereturnontheinvestmentgiventhewidelyvariedflowandpressureconditionsimposedbythewaterdistributionsystem.Theselectionofaturbinedesignspeedisessentialinfacilitatingrunnerdesign,whichmustminimizethehydraulicpressuretransientsonturbinerunawaythatmayresultinoverstressingtheexistingpipelines.Methodandapproachtoevaluatetheseconsiderationsareoutlined.Relevantresultsfortheselecteddesignarepresentedusingthe4.3MWRanchoPenasquitosPressureControl/HydroelectricFacilityasanillustrativeexample.Licensingrequirementsforsmallinlinehydroelectricfacilitiesarealsobrieflydiscussed.