Results of turbulence intensity across the pressure node plane also show, the regular and symmetrical flow structures in the tube have been turned to turbulence.

TUPWR algorithm was adopted for the pump turbine model, SFPUMP for feed pump system, SOVLV for minimal flow valve, and pressure node for calculating the discharge rate of the pump.

By example, the node pressure method and steps of the water flow optimal regulation were introduced in order to provide the theory.