Method for determination of volumetric flow of medium in medium-flow plant e.g. process exhaust air system, involves determining driving power of fluid-flow machine and determining volumetric flow from current determined driving power

摘要

The method involves determining driving power of fluid-flow machine (4) and determining volumetric flow of medium (2) from current determined driving power. The driving power is determined by using currently determined parameter of frequency converter (7) which is coupled with an electromotor (6) for the drive of fluid-flow machine. An independent claim is included for device for determination of volumetric flow of medium-flow plant.