New Fire Pump Analyzer - Your Input Needed

9/20/2018

Based on some feedback and good ideas I've been experimenting with graphing fire pump & flow test curves with usable data outputs. Below is the first iteration for drawing a fire pump curve alongside a water supply curve.

Determining ideal fire pump configurations for sprinkler and standpipe systems can be
an important part of optimizing fire suppression design

SEE THE FIRE PUMP ANALYZER

Here's the help I could really use from you - what else would be included in your ideal pump curve?

Would you prefer this be on a logarithmic x-axis?

Want 175 & 300 psi limit lines shown?

Would you want to see at what height in a building the 175 psi threshold would occur - on this graph?

System demand and hose?

I'm open to any and all ideas - in the end I think it'd be great if this tool was the quickest & best method for summarizing and analyzing fire pump output. Share your ideas in the comments here, thanks in advance!

Download This Tool (with Future Release)

7 Comments

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Joe

9/20/2018 11:19:20 am

If the graph isn't updating, refresh the page real quick. Thanks!

Jim Mernickle link

9/20/2018 11:29:10 am

Good morning!
I am really happy that you are working this fire pump curve stuff, and thank you !!
I guess the main thing I would like to see is a program whereas I input results under the following conditions:

- Churn- suction and discharge Pressures & rpm

-Rated flow- suction and discharge pressures, rpm & gpm

-max flow- suction and discharge pressures,rpm & gpm

--Then voila the curve is there at the press of a key--

Would also like to have places at the top of the form for the:

-name of the building

-make, model & serial # of the fire pump

-gpm & rpm rating of the fire pump

We would use a separate form of our own for data on the controllers and the jockey pump, however if you wanted to make that part of your form, that would work too.

My thoughts :-)

Jim Mernickle

Vince

9/20/2018 12:30:33 pm

Good work! Why not:

Allow for a couple of more optional inputs,
Sprinkler static, sprinkler flow and sprinkler demand at the pump .

Then have it publish a pdf of the curve for inclusion in a sprinkler drawing and a separate sheet for the input/output detail.

Also, on the interface sheet."churn" not "church"

9/23/2018 03:47:04 pm

Thanks for the feedback Vince!

When I work on Sundays these things are just bound to happen...

Tony G

9/22/2018 07:57:02 pm

Hi Joe,

Excellent work on this one also. The options listed above would be great adds. Could you add a simple input for a system demand and have it plot that point with a label? The point of interest capacity is a nice function. It appears your values for Pcity and Ppump may be reversed in the labeling in the point of interest function.

Ed Long link

9/24/2018 11:26:10 am

Mr. Meyer -

Another great Tool, for all FP Designers! Awesome!

Is there a way to integrate this Tool, with a Fire Sprinkler System Demand / Standpipe Demand Calculator?
Perhaps something that would Calculate the estimated System (and / or Standpipe) Flow and Pressure first, then allow the user to size the Fire Pump accordingly?...

Mohamed

9/26/2018 08:15:51 am

Hi,

Thanks for your efforts.

I have a question about fire pump setting.

As per NFPA 20 - 2019 edition, (clause A.14.2.6) point no. (4 - f):
Examples of fire pump settings follow (for SI units,1 psi = 0.0689 bar):
i. Pump: 1000 gpm, 100 psi pump with churn pressure of 115 psi
ii. Suction supply: 50 psi from city — minimum static; 60 psi from city — maximum static
iii. Jockey pump stop = 115 psi + 50 psi = 165 psi
iv. Jockey pump start = 165 psi - 10 psi = 155 psi
v. Fire pump stop = 115 psi + 50 psi = 165 psi
vi. Fire pump start = 155 psi - 5 psi = 150 psi
vii. Fire pump maximum churn = 115 psi + 60 psi = 175 psi

my question is how could the start and stop points of main pump exceeds 140% of rated pressure, when NFPA requires at the shutoff pump head not exceeds 140 of rated head.

Thank you.

New Fire Pump Analyzer - Your Input Needed

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