Diesel FP Cooling Water Discharge GPM?

[TrippL]

I have a 2000 gpm diesel fire pump with Clarke engine. What can the expected cooling water discharge be? This will have to be routed to a drain? Any other options?

 

[TrippL]

I will answer my own question. The flow rate will depend on the engine mfg and the supply water temperature. The Clarke engine I am using has a data sheet listing of 10 - 14.5 gpm depending on the temperature range from 60-95 deg F. Typically this discharge is routed to a drain (sized to accommodate flow rate). However NFPA does allow it to be routed to a suction side reservoir as long as certain other requirements are met.

 

[b1ueshift]

That number seems very low. Is that a minimum required?

If your system has a 32mm (1 1/4") cooling loop discharge direct to drain the actual water discharge will be closer to 50 gpm. You can reduce this figure by reducing the diameter of the pipe in the cooling loop drain discharge.

Last time I checked NFPA 20, this water had to discharge to a drain. Presumably you could discharge to a sump and collect the water with a submersed pump and pipe it back to the storage reservoir if you were particularly concerned about water conservation.

 

[Pumpsonly]

If my memory serve me right,you can route the cooling water back to the storage tank directly but you must have a sight flow indicator on the return line visible to the operator.

Even you discharge to the drain, it must be visible to the operator also.