Technique for measuring gas conversion factors
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsJag J. Singh, Danny R. Sprinkle
Life of this patent
Estimating the term…
Abstract
A method for determining hydrocarbon conversion factors for a flowmeter 17. A mixture of air, O.sub.2 and C.sub.x H.sub.y is burned and the partial pressure of O.sub.2 in the resulting gas is forced to equal the partial pressure of O.sub.2 in air. The flowrate of O.sub.2 flowing into the mixture is measured by flowmeter 13 and the flowrate of C.sub.x H.sub.y flowing into the mixture is measured by the flowmeter 17 conversion factor is to be determined. These measured values are used to calculate the conversion factor.
Claims6
A method for obtaining the hydrocarbon C.sub.x H.sub.y conversion factor for a flowmeter comprising the steps of:
- forming a mixture of air, O.sub.2 and C.sub.x H.sub.y with O.sub.2 flowing into the mixture at a flowrate of m and with C.sub.x H.sub.y flowing into the mixture at a flowrate of n;
- burning said mixture to form a product gas;
- comparing the partial pressure of O.sub.2 in the product gas with the partial pressure of O.sub.2 in air;
- measuring the flowrate of the C.sub.x H.sub.y flowing into said mixtures with said flowmeter;
- and
- changing the flowrate of O.sub.2 flowing into said mixture until said comparing step indicates that the partial pressures of O.sub.2 in the product gas and air are equal;
- whereby the reading on the dial of said flowmeter can be used for calculation of the conversion factor of said flow meter for the hydrocarbon C.sub.x H.sub.y.
A method for obtaining the conversion factor of a flowmeter when measuring the flowrate of a gas M.sub.x N.sub.y comprising the steps of:
- forming a mixture of air, O.sub.2 with M.sub.x N.sub.y with O.sub.2 flowing into the mixture at a flowrate of m and with M.sub.x N.sub.y flowing into the mixture at a flow rate of n;
- burning said mixture to form a product gas;
- comparing the partial pressure of O.sub.2 in the product gas with the partial pressure of O.sub.2 in air;
- measuring the flowrate of M.sub.x N.sub.y flowing into said mixture with said flowmeter;
- and
- changing the flowrate of O.sub.2 flowing into said mixture until said comparing step indicates that the partial pressures of O.sub.2 in the product gas and air are equal;
- whereby the reading on the dial of said flowmeter, m/n of the test gas and the flowrate of O.sub.2 into the mixture can be used for the calculation of the conversion factor of the flowmeter.
Dependencies are inferred from the claim text.