G - Physics – 01 – N
Patent
G - Physics
01
N
73/63, 73/95
G01N 25/32 (2006.01)
Patent
CA 1105288
ABSTRACT OF THE DISCLOSURE Method of and means for accurately measuring the calorific value of combustible gases wherein a mixture of com- bustible 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 sub- stantially 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.
358004
Fetherstonhaugh & Co.
Precision Machine Products Inc.
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