What does a 'pump curve' illustrate in power engineering?

A pump curve is essential in power engineering as it graphically represents the performance characteristics of a pump. It usually plots the pump's flow rate against the head (pressure) provided by the pump across various operating conditions. This information is crucial for engineers and operators when selecting a pump for a specific application, as it helps in understanding how the pump will perform under different loads and conditions.

The curve provides insights into critical parameters such as efficiency, horsepower requirements, and how the pump will behave at varying speeds or during changes in system pressure. By analyzing the pump curve, engineers can determine the optimal operating point and ensure that the pump operates within its design parameters, thus maximizing efficiency and minimizing the risk of failures.