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The purpose of this video is to
describe how to
use ABB's pump save energy savings calculator
and as you can see this is based on an excel spreadsheet
the white cells are
cells that you put your input in and the yellow
shaded cells are the results the program calculates
so after selecting
the appropriate language
and then the measurement units
either metric or US, I've selected the US
we need to enter information that would be pertainent to
your application
here we have 62
which is the correct number for the density of water
this static head here is
the difference between the suction
elevation and the discharge elevation of any given pump
which would normally be entered in as one foot
I've put in five hundred gallons per minute here as my flow rate
of course I could put anything I want in, 750 gallons
we could put that in
this effeciency from the pump curve we're saying is 88
and we're saying that the nominal head
to produce 750
gallons per minute from this pump curve
would be 33
feet of head
or to convert that to psi would take 33 times .433
the maximum head shown here would be
if you did have a throttling valve as it were shown here
and you crank that valve closed, what would be the head produced by that pump? deadhead pressure
zero flow
and we're going to say
44 psi would be that amount
now of course here we can choose
to compare
the vfd
solution to
a throttling control, an on off control, or hydraulic control. We've chosen to
compare to a throttling control
here we have the ability to select our input voltage
in this case
it's 460
and it's telling us right here that the required motor power is 7.8 horsepower
so if that's the case we're going to select a 10 horsepower motor for this application
and the motor efficiency is
something we could pull out of the
motor manufactures catalog
or if it's an existing motor
right off the motor nameplate
this area here is where we describe for an entire year
8,760 hours
how many of those hours
would the pump be producing this amount or percentage of flow
we have the ability to come up here and change that
which is reflected in our graph over here
and then the message at the bottom reminds us that
if we're going to increases this amount
we have to decrease
another amount so that the totals
are actually equal to a hundred percent
and of course here we can enter
information for the appropriate individuals
that we're working with, here we've selected a series of
ABB pump that we might be working with
could be an ACS
perhaps a 310, 355, maybe a 550 in this case
its recommending a ACS 550-U1-015A-4
if we click this button it actually copies that model number to the clipboard so we can put it
into
order
that's addressed to Technicon
here we have of course
the saving percentages
we're saving 54 percent
and this is calculating the annual energy consumption
and we can see with the improved control method we've got considerable reduction there
and the annual energy-saving
now here we've put in US dollars
also that energy is costing
about seven cents per kilowatt hour
now this is where you would put it in the cost of the variable frequency drive approach
as opposed to say a throttling valve
in other words your putting in the different here, let's say I'm going to put in
750 dollars as the difference
and the interest rate
I'm using to compare is
let's put in 5 percent
so now
over here the economic results is telling me that my annual savings would
$1,519 dollars
and since I've only
paid $750 dollars
additional for the variable frequency drive my pay-back period is actually
one-half of a year
and as long as this value is positive it's a good investment
now I can come over here
save my calculation
I can print it
and of course close the program
you can download this program from our www.techniconiec.com website
under technical and engineering data tab on the left hand side of our website
and we thank you for watching the video
and hope you'll come back for our next video...jwagner@techniconiec.com