Sump Design
Sump Design
(OP)
Hi all,
With reference to my previous post thread407-176454 (Cooling towers and vertical pumps), I am designing a sump for the vertical wet pit pumps. I have thus far used the Hydraulic Institute guidelines but was wondering how to determine the depth of the sump. Keeping in mind that the speed of the water coming in has to be 1m/s max (at least according to HI).
The figures I am working with are basically the capacity of the pump and the dimensions from HI.
Any help or guidance would be greatly appreciated.
With reference to my previous post thread407-176454 (Cooling towers and vertical pumps), I am designing a sump for the vertical wet pit pumps. I have thus far used the Hydraulic Institute guidelines but was wondering how to determine the depth of the sump. Keeping in mind that the speed of the water coming in has to be 1m/s max (at least according to HI).
The figures I am working with are basically the capacity of the pump and the dimensions from HI.
Any help or guidance would be greatly appreciated.





RE: Sump Design
RE: Sump Design
If NPSHr / NPSHa is marginal you will have to increase the submergence to provide adequate NPSHa at the minimum operating level of the sump.
If this is a major pump installation with pumps of high flow rates I would be seeking professional. Believe me,a hit and miss approach is a recipe for disaster and I am sure there are many in this forum who can tell you some horror stories on poor intake design and vertical pumps.
RE: Sump Design
Artisi has just given you the best possible advice that I heartily second. You need to get competent professionals involved in the analysis and resolution of your problem(s).
Considering the information that you have provided in these two threads, you appear to be in the disquieting situation of having limited experience in these matters while having to attempt to implement a "solution in search of a problem" and having to do this on a shoestring budget. Having knowledge of such situations in the past, the prospects of a happy outcome for your project do not seem very promising. I sincerely do wish you very good luck.
RE: Sump Design
rmw
RE: Sump Design