Friction head positive or negative?
Friction head positive or negative?
(OP)
in my reference book (MERM book, page 18-6), they are analyzing a pipe system and show the friciton head on the suction side of a pump as negative (this makes sense to me, since the friction is taking some of the head away from the fluid). but on the discharge side, they show the friction head as positive. this is confusing to me, especially since they then find the total head added by the pump, which is discharge head minus suction head, which gives you positive frition heads for both the suction and dicharge side. can someone clarify?





RE: Friction head positive or negative?
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RE: Friction head positive or negative?
TDH = discharge head + discharge loss - suction head - suction loss.
You also have to be concious of where in the system the head values are taken (either at the pump or at the ends of the lines).
RE: Friction head positive or negative?
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