Method for measuring the mass flow of a stream of a gaseous medium and fuel supply system for conducting the method
A method is provided for measuring the mass flow (M1-Mx) of a stream of a gaseous medium of elevated first temperature (T2) flowing through a specific pipe (F1-Fx), comprising the steps of: a) providing a reference stream of said gaseous medium with a known mass flow (M ref ) and a second temperatur...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | A method is provided for measuring the mass flow (M1-Mx) of a stream of a gaseous medium of elevated first temperature (T2) flowing through a specific pipe (F1-Fx), comprising the steps of:
a) providing a reference stream of said gaseous medium with a known mass flow (M ref ) and a second temperature (T1) being substantially lower than said first temperature;
b) mixing said reference stream with said stream of a gaseous medium of elevated first temperature (T2) flowing through said specific pipe (F1-Fx);
c) measuring the resulting temperature (T31-T3x) of the mixture of said reference stream and said stream of a gaseous medium of elevated first temperature (T2) flowing through said specific pipe (F1-Fx); and
d) determining the unknown mass flow of said stream of a gaseous medium of elevated first temperature (T2) flowing through said specific pipe (F1-Fx) from the known mass flow (M ref ) of said reference stream, said elevated first temperature (T2), said second temperature (T1) of said reference stream and said measured resulting temperature (T31-T3x) according to the formula: Mx = M ref ¢ T ¢ 1 - T ¢ 3 ¢ x T ¢ 3 ¢ x - T ¢ 2 , where Mx is the unknown mass flow, M ref is the known mass flow of said reference stream, T1 is the second temperature, T2 is the elevated first temperature, and T3x is the resulting temperature after mixing. |
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