Energy of the water pump
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This post was last edited by jibapeng on 2017-3-4 at 18:36. Guys, I have a question: the water level in the tank is 1 meter high; a pump is connected to the bottom of the tank, and a pipeline is used to carry the water from the pump’s outlet back to the tank. If a water pump with a power of 5 kW acts on the water, does the water then have kinetic energy and thermal energy? As it passes through the pipes, there are frictional forces along the way as well as local resistances, which result in a loss of some of its kinetic energy. So when the water returns to the tank, won’t it still contain a lot of thermal energy? . Will the water temperature rise then? What if the water is hot water at 90 degrees? Will it also increase? . I really don’t understand it. . I also want to thank everyone for their replies. What I’m actually trying to investigate is the change in water temperature over time as the system operates… Both the pipes and the tank are covered with rubberized foam, and the temperature inside the tank is 90 degrees. I’m wondering if the water coming out of the pump will be slightly warmer, and then, considering the expected losses along the way as well as local resistance losses, as well as heat dissipation in the tank, how does the water temperature change? I don’t understand this relationship; please advise those who know…
I forgot to mention it. Because in the end, when the water returns to the tank, it is basically at rest. . Has it all been converted into heat energy?
The water won’t get hot; it’s the pump that gets hot~~~ Devices that are in use tend to generate heat more easily: lol
What kind of energy does that water pump supply? Kinetic energy?
Well, kinetic energy! {:3_57:}
Bro, this is really an interesting question. Are you studying theoretical physics or engineering problems? It can be said that the water pump imparts kinetic and potential energy to the water; the friction in the impeller also adds thermal energy to the water, along with heat dissipation due to the vaporization of water...
Thank you. So, when the water returns to the tank, part of its kinetic energy is lost due to friction within the pipes; what happens to the remaining kinetic energy? Is it potential energy… an elevation of one meter in water level… or some other form of energy?…
I’m not really sure what this counts as… There’s both theory and practice involved, I guess. What I actually want to calculate is the temperature change of water when it flows through the pipes for one hour, or half an hour. The tank temperature is 90 degrees. If I run it for 1 hour, with both the pipes and the tank covered with rubberized foam, by how much will the water temperature drop? I’ve studied convective heat transfer and the heat dissipation from the tank… What I mainly don’t know is how to calculate the temperature provided by the water pump…
To be conservative, motor power X (1-efficiency)