G - Physics – 01 – N
Patent
G - Physics
01
N
73/95
G01N 31/12 (2006.01) G01N 33/00 (2006.01) G01N 33/22 (2006.01)
Patent
CA 2021228
ABSTRACT OF THE DISCLOSURE A method and device for measuring energy in fuel gas comprises a solid electrolyte oxygen pump for generating an amount of oxygen in response to current being supplied to the pump. A sample of the gas is mixed with the oxygen from the pump to produce a mixture which is subjected to complete combustion in a catalytic combustor. An oxygen sensor is connected to the catalytic combustor for measuring excess oxygen in the exhaust gas from the combustor. A signal from the oxygen signal is compared to a known and desired amount of excess oxygen in the exhaust gas. If there is too much or too little oxygen in the exhaust gas, a feedback signal is used to adjust the amount of current being supplied to the oxygen pump until the actual amount of excess oxygen is equal to the selected amount of excess oxygen. The selected amount of excess oxygen is indicative of complete combustion of the sample mixture. With the excess oxygen equaling the desired oxygen in the exhaust gas, the amount of current being supplied to the pump is used to calculate the energy in the fuel sample.
Elsag International B.v.
Ridout & Maybee Llp
LandOfFree
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