METHOD AND APPARATUS FOR DETERMINING THE WOBBE INDEX OF GASEOUS FUELS

摘要

A method and apparatus for determining the Wobbe Index of gaseous fuels is disclosed in which a mixture of sample fuel, the flow of which is monitored by pressure differential across a flowmeter, and a substantially constant amount of air is burned in the presence of an electrochemical sensor which exhibits a rapid change in output signal about a certain combustion product composition. The fuel content of the mixture is adjusted in response to the sensor output signal until the certain combustion product composition is attained and the Wobbe Index determined from a known relationship between the heating value of the fuel constitutents and the amount of oxygen required for the combustion thexeof at said certain combustion product composition and the pressure differential across the fuel flowmeter. Calibration of the system may be accomplished with standard gases.