Method for measuring the quantity of heat present in fuel gas
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United States of America Patent
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Sep 10, 2002
Grant Date -
N/A
app pub date -
Jun 2, 2000
filing date -
Jun 4, 1999
priority date (Note) -
Expired
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Abstract
Method for measuring and/or regulating a quantity of heat contained in a fuel gas, the calorific value of the fuel gas being used as an input parameter, in which method a) the fuel gas or a part-stream of the fuel gas is guided through a volumetric meter or a mass flow meter, and the volumetric flow rate or the mass flow rate is measured, b) the speed of sound of the gas is determined under first reference conditions, c) one of the measurement variables dielectric constant, speed of sound under second reference conditions, carbon dioxide content of the fuel gas, nitrogen content of the fuel gas or density under standardized conditions is recorded; and d) the quantity of heat supplied is derived from these parameters, together with the calorific value of the fuel gas, as a measurement variable or control variable.
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