Method and system for determining the mass flow rate of a fluid in a fluid circuit for controlling a metering valve of the fluid circuit

摘要

A method for determining the mass flow rate (Qm) of a fluid in a fluid circuit supplied by a reservoir (R), in particular for controlling a metering valve (14) of the circuit, said method comprising: a measurement a volume flow (Q30) and a first temperature (T30) of the fluid at a first measurement position in the circuit, a measurement of a second density (d20) and a second temperature (T20) of the fluid at a second measurement position in the reservoir (R), a determination of a first density (d30) of the fluid associated with the first temperature (T30), from the second density (d20), of the second temperature (T20) ) and the first temperature (T30), and a calculation of the mass flow rate (Qm) of the fluid from the volume flow rate (Q30) and the first density (d30) of the fluid. Abstract figure: Figure 3A