Method and system for determining a component's resistance to flow

A flow monitoring system (138) includes one or more sensors (146,148) configured to generate a signals representative of a pressure of a fluid at a location upstream of a component, a pressure of the fluid at a location downstream of the component, a temperature of the fluid at the component, and a measurement of the flow through the component and a processor (65) programmed to determine a value indicative of a density of the fluid at the component using the temperature, determine a value indicative of an equivalent resistance to flow at the component using the generated signals and the determined density, and output the determined equivalent resistance to flow value.