Abstract: Michanical flow regulation is the key part of cooler. Using the hydromechanical energy equation, principle of old mechanical flow regulation is analyzed. And structure design error is found. Based on it, a new theoretical design method for cooler mechanical flow regulator is proposed. The design error of new designed mechanical flow regulator can be eliminated. Furthurmore, it will give a guicance to the design of mechanical flow regulator in practical application. Simulation result show that new disigned mechanical flow regulator could improve effectively adjust performance, and avoid high frequency wiggle like old mechanical flow regulator.

Key words: Cooler, Design, Error, Mechanical flow regulation