booster pumps
booster pumps
(OP)
hi,
I am struggling to determine the discharge of a booster pump , which is a part of my project.Pump is supposed to deliver the required volume at fixture outlet pressure of minimum 20 psi .i have a water storage tank of 1000 m3 (2.6 m height )capacity and using uPVC pipes..how do i have to calculate discharge of the pump in gpm? can anybody suggest me standard procedure for selecting a booster pump? i have calculated using wsfu method , client says pump capacity is high!
I am struggling to determine the discharge of a booster pump , which is a part of my project.Pump is supposed to deliver the required volume at fixture outlet pressure of minimum 20 psi .i have a water storage tank of 1000 m3 (2.6 m height )capacity and using uPVC pipes..how do i have to calculate discharge of the pump in gpm? can anybody suggest me standard procedure for selecting a booster pump? i have calculated using wsfu method , client says pump capacity is high!





RE: booster pumps
Perhaps you can provide a sketch of the system?
Did you size the pumps based on the total units?
Is your system looped back to the tank?
Why is the client stating that the flow is too high?
RE: booster pumps
bimr , thnx for replying.pump is looped back into tank , i have calculated based on wsfu method.which would give me a booster pump with discharge of 386 gpm , while the client side says it can be around 140 gpm..is there any other methods i have to consider while designing booster pump capacity ? can you suggest me standard methods for booster pump sizing ....
RE: booster pumps
RE: booster pumps
If you look at textbooks (Fair & Guyer for example), the peak hourly flow will be approximately 10X the average daily flow. This ratio is based on empirical population studies of water systems.
These types of system with large flow variations are usually handled with VFD's on the pump motors so that the capacity may be reduced. By tracking pressure, flow or electrical current, a variable speed booster pump can deliver constant pressure at any flow rate.
Review the links for the particulars. These systems are similar to the booster pump systems for high rise buildings which have been written up in trade journals.
https://www.taco-hvac.com/images/boost.pdf
http://www.asse-plumbing.org/Articles/Water/How%20...
RE: booster pumps
RE: booster pumps
I have a similar design problem. My design consist of 18 two storey apartments. Each apartment has 4 washrooms (water closet + wash hand basin + shower), 2 kitchens and 1 washing machine.
I'm trying to size a booster pump to boost water from a break tank to all the apartments.
Thank you
RE: booster pumps
You have to determine what building code the AHJ has adopted. Once you have determined the code requirements, then you can proceed to estimate the water supply requirement.
Attached is an outline of the methods that are used to estimate the water demand.
There is one note in the table that shows each Apartment, multiple family (per resident) is 50 GPD (note this is not peak demand).