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Load on a Sea Water Stainer
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Source：Internet Author：Unknow Pubdate：2008-12-16
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tapav (Mechanical)
8 Dec 08 11:01
I need to calculate the force exerted on a mesh for a sea water strainer. flow 15,000 kg/hr 7m x 3.2m flow area. 17 x 17 mm 2mm wire mesh. How can I calculate a force when clean and an estimate when blocked with fish!?
Any pointers would be much appreciated.
thanks,
pav
tapav (Mechanical)
8 Dec 08 11:18
right i've had my first thought.. if i just assume it is completely blocked, like a dam and just calc the hydrostatic head 7m deep that should be the worst case loading? is this correct?
cvg (Civil/Environme)
8 Dec 08 11:23
will your pump be exerting suction on the strainer at the same time?
tapav (Mechanical)
8 Dec 08 11:37
字串7
ye good point. I guess so, but have no info on the pump presently. Im also guessing it will have some sort of cut off too if the strainer becomes blocked?
cvg (Civil/Environme)
8 Dec 08 11:50
well, the breaker probably would kick off if it overheats, or you could add a pressure sensor switch at the strainer.
BigInch (Petroleum)
8 Dec 08 11:59
Conventional wisdom would suggest a differential pressure switch at the strainer to shut down the pump, NOT set for completely blocked flow. It would also suggest that you build fish screens at the intake; not catch them with the strainer! **********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
字串6
BigInch (Petroleum)
8 Dec 08 12:01
Presumedly this is for a power plant or something and you're not fishing with this set up. **********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
tapav (Mechanical)
8 Dec 08 12:04
ye fair enough.. my wisdom isnt always conventional! anyway, I'm trying to work out the max load, would a partially blocked flow have a greater load due to the increased drag or shall i just use the hydrostatic head when fully blocked?
BigInch (Petroleum)
8 Dec 08 12:11
A bunch of fish packed sideways might have a 1.4 drag factor, but I sure wouldn't want to prove that. ********************** 字串2
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
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