Experiment No.1Performance and Benefits of Pumps in Series/Parallel OperationsI. Objectives1. To so! te performance and benefits of sin"le pump and pimps connected in seriesand in parallel operations.II. #aterials/E$uipments Needed1. Series/Parallel Pump Test %i"&. 'ater(. )djustable *ounter!ei"tIII. E$uipment Set +pM, H2OM, H2ORPMP2L/SM, H2OM, H2OP1To V Notch AA1BCDYYSeries OperationM, H2OM, H2ORPMP2L/SM, H2OM, H2OP1To V Notch AA1BCDYYParae OperationI,. Teor-) -draulic pump is a macine !ose function is to convert mecanical ener"- into fluidener"-.principall-tepressureener"-component. tusfacilitatin"teraisin"soffluidstrou" pipelines and for boostin" te flo! in lon" pipelines. /-draulic pumps ave a !ideran"e of applications. e.". in small eatin" s-stems. cemical process plants. se!a"edisposal.!ater suppl-and "round!aterabstraction.draina"e.constructionsite andminedraina"e.Tere are tree main t-pes of pumps0 reciprocatin". rotar-. and rotod-namic. Tereciprocatin"t-peconsistsofapistonmovin"inac-linderand. altou"no!lar"el-supersededb-terotod-namict-pe. isstillusedforsmall$uantit-.i"pressureduties!ere teir efficienc- of as muc as 123 exceeds tat of centrifu"al pumos. In te rotar-pump. pressureis"eneratedb-meansofintermesin"ears4 tist-peis!idel-usedforlubricatin" duties.In rotod-namic pumps. te pressure rise is created b- an impeller. consistin" of a number ofcurve blades. !ic rotate in a ousin" saped to "ive maximum efficienc-. %otod-namicpumps ma-rater besub5classifiedintoradial flo!. mixedflo!andaxial flo!t-pesaccordin" to te predominant direction in !ic te li$uid flo!s across te impeller bladesfrom inlet to outlet. 6or a "iven po!er input te radial flo! pump !ould produce a relativel-i"pressure!itasmall discar"ecompared!itteaxial flo!pump!ic!oulddeliver a lar"e flo! but !it a small pressure rise.Te centrifu"al pump is te most !idel- used t-pe of rotod-namic pump and is an exampleof te radial flo! t-pe. Te impeller consists of a number of curved blades mounted in a discor discs. Te li$uid enters at te center of te rotators impeller !ic imparts a centrifu"alaction tus forcin" te li$uid radiall- out!ards into te spirall-5saped volute casin" !icconverts a lar"e portion of te velocit- ener"- into pressure ener"-.Tereis a!ideran"eof centrifu"al pumpscommerciall-available to cover te ran"e ofpossiblepractical duties. Insomepumpin"stationsit ma-bedesirabletoinstall severalpumps eac of !ic ma- be brou"t into operation b- li$uid level sensors and appropriateelectrical s!itc"ear. Suc an arran"ement called parallel operation. !ould be able to delivervariable flo! suc as is encountered in se!a"e scemes. Te alternative !ould be to ave asin"le variable speed pump !ic ma- prove to be a more expensive arran"ement.*onnectin" pumps or pump sta"es. suc tat te discar"e from one sta"e is directed to teinlet of te next. produces a series of pressure rises !ile te same discar"e passes trou"eacsta"e. Intis!a-i"pressureeadsareproducedforuseinboreoles. e.". tisarran"ement is called series operation and is te basis of te multi sta"e pump. Since tesame discar"e passes trou" eac sta"e te combined caracteristic is obtained b-summin" te individual total eads at a number of discar"es. Pump Calculations:Capacity, Q.*apacit- is te $uantit- of fluid discar"ed per unit time. In fps s-stem. tis is expressedin "allons per min 7"pm8 for li$uidsH!"#$P!PsFigure 1-3. Centifugal PumpTotal Suction Head or ift.Tisisdefinedastotal suctioneadandisteabsolutepressureeadintesuppl- vessel plus te suction ead minus te friction ead. If te total suction ead ismeasured from te readin" of a pressure "au"e at te suction flan"e of te pump. tenTotal Suction /ead 9 PSg+V S22gHs=PSgVs= QAsTotal Suction /ead 9 /s : ( QAs)22g'ereP 9 Pressure/ 9 pressure ead; 9