Measuring and testing – Volume or rate of flow – System
Patent
1977-04-27
1978-11-14
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
System
G01N 2530
Patent
active
041250184
ABSTRACT:
Method of and means for accurately measuring the calorific value of combustible gases wherein a mixture of combustible gas and combustion-supporting gas is burned in a pair of flames, the temperatures of the burned gases in both flames being monitored and the volume ratios of the combustion-supporting gas to the combustible gas fed to both burners being adjusted so as to maintain the average of said temperatures at substantially maximum; the volume ratio of said gases which produces said maximum average temperatures varying substantially directly with the calorific value of said combustible gas; the aforesaid calorific value being proportional to said volume ratio of said gases which maximizes said average temperatures; the flow rates of said gases being measured by a single flow sensing system, preferably, of the turbine flowmeter types, or the volumetric flow rate of said combustion-supporting gas being maintained at a constant value while the volumetric flow rate of said combustible gas is being measured; said calorific value measuring method and means being unaffected by ambient temperature and other varying environmental factors. In one embodiment, automatic calibration of the device is obtained by alternately feeding a standard gas and the unknown gas to the burners.
REFERENCES:
patent: 3393562 (1968-07-01), Breedlove
patent: 3777562 (1973-12-01), Clingman, Jr.
Cantrell Thomas L.
Goldstein Herbert
Precision Machine Products, Inc.
Schley Joseph H.
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