Liquids are incompressible; how can a centrifugal pump increase pressure?
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Gases are compressible, while liquids are incompressible. Liquids are incompressible; how can a centrifugal pump increase pressure? Does the water temperature rise when a centrifugal pump is pumping water? What about positive displacement pumps? Like diaphragm pumps?
In simple terms, the energy conservation law states that the impeller imparts kinetic energy to the fluid, and then in the diffuser, that kinetic energy is converted into static pressure energy. A diffuser can be simply understood as a region where the volume suddenly increases; when the liquid enters this area, its velocity decreases, its kinetic energy drops, and that energy is converted into static pressure energy. The water temperature will rise, no matter what pump is used.