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Originally Posted by unregistered
NPSH = net positive suction head -> google
most quiet sitting on its tail (flat backside, inlet facing up)
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I'll take a stab at it.
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Total Head: The difference between the pressure head at the discharge and suction flange of the pump ( syn Total Dynamic Head. pump head, system head).
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With that deffinition, it would seem to me that dumping the output of a pump directly to the input of another pump would alter the suction conditions, therefore altering the total head which would affect flow rate.
Intuitivley, I think, an amount of total head equal to the suction head of one pump is gonna come up missing.
Or:
With the pump on its back with the inlet facing up would definately alter suction conditions.
Does any of this really apply to a closed loop?
*puts on NOMEX suit*