Thermal measuring and testing – Calorimetry – Heat value of combustion
Patent
1981-03-17
1983-04-19
Goldstein, Herbert
Thermal measuring and testing
Calorimetry
Heat value of combustion
G01N 2522
Patent
active
043804004
ABSTRACT:
A combustible gas analyzer for determining the calorific content of a combustible gas uses a constant flow rate air supply and a constant pressure combustible gas supply to provide oxygen and gas for combustion. The regulated air is supplied directly to be mixed with the combustible gas. On the other hand, the combustible gas is passed through a series connection of a pressure regulator and a variable orifice or valve before mixing with the air supply. A feedback pressure to control the pressure regulator for the gas is obtained from the output of the valve. The mixture of air and gas is burned in a combustion chamber, and a zirconium oxide detector is arranged to measure the oxygen content of the combustion products to enable a predetermined oxygen level to be reached, e.g., stoichiometric combustion. The valve is operated by a valve control apparatus responsive to the output of the detector to maintain the preset oxygen level. The position of the valve is monitored as a representation of the calorific content of the combustible gas.
REFERENCES:
patent: 3001550 (1961-09-01), Engel et al.
patent: 3013790 (1961-12-01), Anderson et al.
patent: 3047010 (1962-07-01), Rothfuss
patent: 3137312 (1964-06-01), Hanes
patent: 3139899 (1964-07-01), Schwerter
patent: 3393562 (1968-07-01), Breedlove
Burton Lockwood D.
Goldstein Herbert
Halista Mitchell J.
Honeywell Inc.
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