Does adding another impeller in a multi-stage pump increase the volume output?

Does adding another impeller in a multi-stage pump increase the volume output?

• A. Yes, it significantly increases volume output.
• B. No, it does not increase volume output.
• C. It depends on the system design.
• D. Only if the impellers are larger.

Answer: (B)

In a multi-stage pump, adding another impeller does not significantly increase the volume output. The primary function of additional impellers is to increase the pressure rather than the flow volume. Multi-stage pumps are specifically designed with several impellers arranged in series; each impeller adds to the overall pressure given to the fluid moving through the system. This characteristic makes multi-stage pumps ideal for applications that require the pumping of liquids to significant heights or over long distances. The flow rate, or volume output, is primarily determined by the design of the pump, including the diameter of the impeller and the speed at which it operates, rather than the sheer number of impellers. Thus, while the overall pressure can increase with more impellers in the pump, the volume of fluid being pumped does not necessarily change significantly. In a well-designed system, each stage works to impart energy to the liquid, raising its pressure but not effectively increasing the volume output in a linear manner.

In a multi-stage pump, adding another impeller does not significantly increase the volume output. The primary function of additional impellers is to increase the pressure rather than the flow volume. Multi-stage pumps are specifically designed with several impellers arranged in series; each impeller adds to the overall pressure given to the fluid moving through the system. This characteristic makes multi-stage pumps ideal for applications that require the pumping of liquids to significant heights or over long distances.

The flow rate, or volume output, is primarily determined by the design of the pump, including the diameter of the impeller and the speed at which it operates, rather than the sheer number of impellers. Thus, while the overall pressure can increase with more impellers in the pump, the volume of fluid being pumped does not necessarily change significantly. In a well-designed system, each stage works to impart energy to the liquid, raising its pressure but not effectively increasing the volume output in a linear manner.