Calculation and application of optimized energy saving operating solution of variable speed centrifugal pumps in parallel

Deduces the calculation formulas of efficiency and power of centrifugal pumps paralleled. Concludes that the requirement for minimizing the total power of the pump group is the same speed change rate of the operating pumps when the same type pumps are paralleled, and that the enumeration algorithm can be used to determine the operating number and speed change rate of different types of pumps (the optimized energy saving operating solution) when the total power of the pump group with two types of pumps is minimal. Gives application examples. The method can be used for optimal control of pump group and determining the most energy efficient pump group selection scheme.