pumping 16 cumecs

[leijen]

We are wanting to pump water into a race for a whitewater kayaking course. (16 cubic metres per second)
We want to lift the water 5 metres from a deep river.
Then the water will pour into a pool and flow into the race.

I want to Know
pump size
electricity usage

This is for costings per hour for our submissions work.

Cheers

Sam

 

[quark]

The pump power equation is given by
P = (w x Q x H)/(102 x Eff)
Where P = Power in kW
w = specific weight of liquid being pumped (for water it is 1000Kg/M³)
Q = discharge in M³/Sec
H = Differential head in meters

Your suction lift is 5 meters and I assume you are immediately discharging the water into the pool without any lift in the discharge. So I am considering total head of the pump at 7 meters (2 meters for losses)and considering pump efficiency of 60%.

Therefore, P = 1000 x 16 x 7/(102 x 0.6) = 1830 kW. This is the brake horse power. Now motor has it's own inefficiency. Considering 80% motor efficiency

Motor power = 1830/0.8 = 2287 kW

Best Regards,

 

[Scipio]

You're looking at one (or maybe even two) very large axial or mixed flow pumps with that flowrate. I've never worked with anything that big, the only potentials that I know of would be Goulds' Pumps 54" Axial Flow pump (AF 54x54-54), which you'd need two of for that flowrate. Website PDF for that pump is

http://www.gouldspumps.com/download_files/af/GP_AF_low.pdf

The other potential is Flowserve's BSV, which is a vertical mixed flow pump with a concrete volute. Website is

http://www.fpdlit.com/cms/results_detail.asp?ModelID=6

You might also want to try posting in the "Mechanical Engineers - Pump Engineering" forum, lot of guys there who may have seen this kind of flowrate before.

 

[leijen]

Thanks Quark and Scipio for you quick replies.

I will look at the websites suggested and go on from there.

The formula looks simple enough to use.

I'll be in touch

Sam

 

[billsumner]

Have you considered archemedian screw pumps? These lift very large volumes with a short head. I have used them for emergency storm water systems.

 

[Artisi]

If you are considering pumps of this size and there are many manufacturers who can supply pumps of this size you can expect efficiencies of more like 90 % or higher depending on pumpstyle used.

Naresuan University
Phitsanulok
Thailand

 

[sprintcar]

Although this is clear water, you might look at the large centrifugal pumps by companies like KSB or GIW who can change the impeller vanes to get you very high flow rates.

http://www.giwindustries.com

is another website



"If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut."
-- by Albert Einstein

 

[Artisi]

contact ITT Flygt, they supplied the pumps for the white water course for the 2000 Olympics in Sydney

Naresuan University
Phitsanulok
Thailand