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Originally posted by bigben2k
Yes, that's correct, so you were right.
As for the energy otherwise, it appears in the system in the form of pressure (and that's the answer to myv65). If you take a balloon for example, there is work being done, in every direction, so you don't see anything move, but the work is there.
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Work is the integral of a force applied over a certain distance. If there is no movement, there is no work. If I try to pick up a heavy rock but can't budge it, I'm not doing any work, no matter how much force I exert.
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In our case, our rigs have different pressure points, and that's the "mechanical" energy that the pump provides, with about 70% of the power it is provided with. Everything else (30%) is attributed to (not necessarily in order):
1-EMI
2-Heat
3-Noise
4-Friction (of water against water, water against inner surface, impeller against bearing, impeller against water, etc...)
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It is friction that *causes* heat and noise. They are not independent forms of energy loss.
Note the friction in water due to its own turbulence is basically nil unless you have supersonic flow.
Alchemy