Characteristics of Single Pump and Pumps in Series and Parallel-Use of Industry Standard Software

8/13/2019 Characteristics of Single Pump and Pumps in Series and Parallel-Use of Industry Standard Software

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Ass)+nment No'

No- o. /a+es )n tota& )nc&%d)n+th)s /a+e'

Ma0)m%m *ord Co%nt'

2500 (excluding figures and tables)

Ass)+nment T)t&e'

Character)st)cs o. s)n+&e /%m/ and /%m/s )n ser)es and /ara&&e&1Use o. Ind%str2 Standard So.t3are4

See attached brief for details

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Learn)n+ O%tcomesTh)s ass)+nment addresses the .o&&o3)n+ &earn)n+ o%tcome1s4 o. the mod%&e' /2-um" urve? for the single "um"

alculate and draw the >ystem urve? for the single "um"

4ind the >3uty -oint? for the single "um" and the flow rate@

!nvestigate the result on discharge and total head of o"erating

"um"s in series draw the >-um" urves?

!nvestigate the result on discharge and total head of o"erating

"um"s in "arallel draw the >-um" urves?

om"are the gra"hs for a single "um" and combination of

"um"s 'o find out that the total flow and head gain for the two"um"s in series and in "arallel match the theoretical "rediction

om"are the gra"hs for "um"s in series and "um"s in "arallel#

and describe the similarities and differences

55

9- ,)sc%ss)on and conc&%s)ons8 to+ether 3)th d)sc%ss)on onen+)neer)n+ )m/&)cat)ons and a//&)cat)ons o. .)nd)n+s )nc&%d)n+

uggestions on what sort of "um" arrangements to be used#

; !f the water to be delivered with the same flow rate# to anotheroverhead tank at a higher head (eg Am)#

; if the water to be delivered to the original overhead tank (9mhead) at a higher flow rate (eg 2lBs)

,xam"les of a""lications where "um"s might be connected in

series and in "arallel# and also with situations where it would bemore a""ro"riate (cost;benefit) to select a single "um" of higher"erformance (high flow and Bor head)

20

Tota& : "!!;

Assessment Cr)ter)a

5er.ormance Leve& Cr)ter)a

0 $on;attendance at lab session

4ail (C%0&) 1ttendance at lab session but with submission of "oorly "resented labre"ort showing little evidence of addressing the tasks set -oordiscussion on im"lications of head loss

9rdlass B -1(%0&;%D&)

/ab attendance with below average submission and "resentation of labre"ort with minimal data "resentation# analysis and discussion of resultsand below average discussion of im"lications of head loss

/ower 2ndlass B-1 (50&;5D&)

/ab attendance with good submission and "resentation of lab re"ortwith average data "resentation# analysis and discussion of results and agood discussion of im"lications of head loss

*""er 2ndlass B6,+!' (A0&;AD&)

/ab attendance with very good submission and "resentation of labre"ort with good data "resentation# analysis# discussion of results andconclusions@ a very good discussion of im"lications of head loss

8stlass B3!'!$'!$ (EF

G0&)

/ab attendance with excellent submission and "resentation of lab re"ortwith excellent data "resentation# analysis# discussion of results and

conclusions@ a very good discussion of im"lications of head loss

Sect)on C ' Marker


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Lect%rer


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6r)e.

1 "um" is required to deliver lBsec water from a collection tank (1) at ground levelto an overhead storage tank (.) at 9m from the ground level via %m length of 25mm dia "i"e and fittings with the friction factor (f) of 000:

1 "um" is "urchased for this "ur"ose hen "um" "erform effectively (at the

>3uty -oint? when ystem head F -um" head)# find the flow rate and commentthat whether this "um" deliver water at the rate of 8 lBsec to overhead storage tankeffectively

!f the water to be delivered with the same flow rate (8lBs)# to another overhead tankat a higher head (eg Am)# what sort of "um" arrangements you would suggestI

!f the water to be delivered to the original overhead tank (9m head) at a higher flowrate (eg 2lBs)# what sort of "um" arrangements you would suggestI

"-! Ob=ect)ves

a) 'o investigate the result on discharge flow rate and head of a singleo"erating "um" (see section 58)

b) 'o draw the >-um" curve? (Jead Ks 4low rate) for the single "um"c) 'o calculate the >ystem Jead? for various flows from the above data and

draw the >ystem curve? for the single "um" ("lot the system L "um"curves together)

d) 'o find the >3uty -oint? for the single "um" and the flow rate@ omment

e) 'o investigate the result on discharge and total head of o"erating "um"sin series

f) 'o investigate the result on discharge and total head of o"erating "um"sin "arallel

g) 'o com"are the gra"hs for a single "um" and combination of "um"s 'ofind out that the total flow and head gain for the two "um"s in series andin "arallel match the theoretical "rediction

h) 'o com"are the gra"hs for "um"s in series and "um"s in "arallel# anddescribe the similarities and differences

i) 'o suggest what sort of "um" arrangements to be used# !f the water to be delivered with the same flow rate# to another overhead

tank at a higher head (eg Am)#

if the water to be delivered to the original overhead tank (9m head) at a

higher flow rate (eg 2lBs)=) 'o give exam"les of a""lications where "um"s might be connected in

series and in "arallel# and also with situations where it would be morea""ro"riate (cost;benefit) to select a single "um" of higher "erformance(high flow and Bor head)


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1 single "um" may be insufficient to "roduce the "erformance requiredombining two "um"s increases the "erformance of the "um"ing system

28 5%m/s )n Ser)es' 'wo "um"s may be connected in series# so that water"asses first through one "um" and then through the second hen two similar"um"s o"erate in series# the flow rate is the same as for a single similar "um"but the total head is increased 'he combined "um" head;ca"acity curve isfound by adding the heads of the single "um" curves at the same flow rate 4or

similar "um"s twice the head gain for a single "um"

- 5%m/s )n 5ara&&e&' 'wo similar "um"s may be connected in "arallel# so thathalf the flow "asses through one of the "um"s and the other half through thesecond "um" hen two "um"s o"erate in "arallel the total head increaseremains unchanged but the flow rate is increased 'he head;ca"acity curve isfound by adding the flow rates of the single "um" curves at the same head 4orsimilar "um"s twice the flow rate of a single "um"

$-! ,escr)/t)on o. the E>%)/ment and So.t3are Re>%)red

98 FM?" Ser)es and 5ara&&e& 5%m/s ,emonstrat)on Un)t''he equi"mentcom"rises two centrifugal water "um"s together with a reservoir and associated"i"e work for continuous circulation 'he flow of water through the centrifugal"um" is regulated by a flow control valve on the discharge side of the "um" 1

valve in the inlet "i"ework of the "um" allows the control of suction 1""ro"riatesensors are incor"orated to allow analysis of "um" "erformance


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4igure 8< ,qui"mentFM?" Ser)es and 5ara&&e& 5%m/s ,emonstrat)on Un)t

92 IF,@ Arm.)e&d )nter.ace dev)ce''he 4658 *nit is designed for o"eration usingthe !43G and associated 1rmfield 4658;90% software ignals from the sensorsare sent to a com"uter via this interface device

99 *)ndo3sTM5C 3)th Arm.)e&d FM?"#$!9 so.t3are< 'he software allows controlof the "um" frequency and logging of data from all sensors 'he software also"erforms calculations on the data obtained# and may be construct the gra"hs ofthe results automatically or the data obtained may be im"orted into a s"read;sheet (,xcel) and the gra"hs may be "lotted manually 'he exercises may be"erformed in se"arate tests and these results may be combined into a singlesession without shutting down the equi"ment and "roduced a single s"read;sheet and gra"hs 'he mimic diagram screen of the software is shown below

4igure 2< 'he standard screen of the 1rmfield 90% software and toolbars


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9-! E>%)/ment set %/ and )n)t)a& o/erat)ona& /roced%re

a) !f necessary# fill the reservoir to within 20cm of the to" rim (,nsure the equi"ment isswitched off and the drain valve is at the base of the reservoir fully closed# beforefilling the reservoir)

b) heck that both "um"s are fitted with identical im"ellers (the im"ellers may beviewed through the clear front;"late of each "um")

c) ,nsure the inlet valve and gate valve are both fully o"end) "en both -um" 8 outlet valve and -um" 2 outlet valve fullye) ,nsure the equi"ment is connected to the !43G and the !43G is connected to a

suitable - 'he red and green indicator lights on the !43G should both beilluminated

f) ,nsure the 4658 is connected to an a""ro"riate mains su""ly# and switch on thesu""ly witch on the 4658

g) +un the 4658;90% software heck that M!43< N is dis"layed in the bottom rightcorner of the screen and that there are values dis"layed in all the sensor dis"layboxes on the mimic diagram

h) .oth "um"s must be used at the same setting in this ex"eriment# to ensure identical

"erformance 1s the s"eed of -um" 2 is fixed at its design o"erational "oint# -um"8 should be set to :0& (for a 50JO electrical su""ly) to match

?-! E0/er)menta& 5roced%re

?-" E0erc)se A' S)n+&e /%m/

a) et the 9;way valve for flow in >single? "um" and lose the -um" 2 outlet valveas shown in the 4igure 9

b) !n the software# on the mimic diagram# set the M6odeN to MingleN by selecting thea""ro"riate radio button ('he software will on the -um" 8 L off -um" 2)

c) 1llow water to circulate until all air has been flushed from the system

d) "en and name the results sheet to MingleNe) elect the >7? icon to record the sensor readings and "um" settings for

maximum flow (gate valve is fully o"ened) on the results table of the software

ignals from the "ressure and flow rate sensors are sent to the 1rmfield

software via the !43 data logging device# and are dis"layed on the mimicdiagram screen

-ressure sensor data will be converted as >-ressure heads? and give total

"um" heads (h")

'he flow rate through the "um" can be controlled using the manual gate

(outlet) valve 'his alters the back "ressure on the "um"# and hence the headagainst which the "um" must do work 'he valve is fully o"en (maximum flow)

when the handle is fully clockwise# and is fully closed (no flow) when thehandle is fully anticlockwise 'he correct directions are marked on the handle

f) lose the gate valve to reduce the flow (at the beginning# when the flow is veryhigh close the vale by turning 9 rotation and then 2 rotations) elect the >7?icon again

Pump !on"

Pump # !off"

F)+%re $'


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g) ontinue to close the gate valve to give incremental changes in flow rate (formedium flows turn the gate vale by 8 rotation and for low flows turn by Protation) hen select the >7? icon each time# the software will record thesensor data

h) 1fter taking the final set of data for fully closed gate valve# o"en the gate valve togive incremental changes in flow rate until fully o"en the gate valve elect the>7? icon each time to record the 4low (Q) and 'otal Jead (h") from the sensors

i) hen ad=usting the flow rate# turn the valve handle smoothly and steadily and

observe the result of the change on the software screen 'he system will requirea few moments to res"ond to any changes# so allow time for the sensor readingsto settle and re;ad=ust the valve if necessary before taking a data sam"le

=) ave the result sheet >ingle? and co"y this to your own *.memory stick

?- E0erc)se 6' Ser)es /%m/

a) et the 9;way valve for flow in >series? "um" and o"en the -um" 2# close -um 8outlet valve as shown in the 4igure %

a) reate a new results sheet using the icon in the tool bar +ename this new

results sheet to MeriesNb) 4ully o"en -um" 2 outlet valve and wait for any air to circulate out of the

systemc) elect the >7? icon to record the sensor readings and "um" settings on the

results table of the softwared) lose the gate valve to reduce the flow by a small increment as suggested in

,xercise 1 "rocedures elect the >7? icon againe) ontinue to close the gate valve to give incremental changes in flow rate#

recording the sensor data each timef) 1fter taking the final set of data for fully closed gate valve# o"en the gate valve to

give incremental changes in flow rate until fully o"en the gate valve elect the

>7? icon each time to record the 4low (Q) and 'otal Jead (h") from the sensorsg) ave the results from this exercise before starting next exercise >? (-arallel-um"s)

'his exercise (,xercise .) may be "erformed immediately after the ,xercise

1 and then continue the ,x"eriment without closing the software ave theresults and ensure they are available for ,xercise when required 'heresults sheet may be mani"ulated with the combined results once ,xercise has been com"leted)

?-$ E0erc)se C' 5ara&&e& /%m/

(a) et the 9;way valve for flow in >"arallel? "um" and o"en the -um" 8 L 2 outlet

valves as shown in the 4igure 5

F)+%re 9'


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(b) reate a new results sheet using the icon in the tool bar +ename this newresults sheet to M-arallelN

(c) +e"eat the "rocedures as ,xercise .

(-! Res%&ts .rom the test

n a base of flow rate# "lot a gra"h of total head gain for the single "um" and

for two "um"s connected in series

for two "um"s connected in "arallel

alculate the difference between

the total head gain for single and series "um"s

the total flow rate for single and "arallel "um"s

@-! Conc&%s)on

ee the ob=ectives

-! So.t3are8 sav)n+ and e0/ort)n+ data

'he data accumulated using the sam"le button is held in a series of arrays within the"rogram 'he data can be written by the software to a file in a format suitable forim"orting into a s"readsheet (eg ,xcel 50# %0 formats) 3ata can be saved using theave icon on the standard toolbar 'he data is saved to the currently active file# defined

by the last use of the Mave 1sN command

F)+%re ?'


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7-! G%)de&)nes notes .or 3r)t)n+ %/ 2o%r 3ork(i) Laboratory work

'he following should be observed in all cases

Documents

Characteristics of Single Pump and Pumps in Series and Parallel-Use of Industry Standard Software