Accurate flow measurement is usualy achieved only through an investment in knowledge, quality equipment, and careful design and implementation. The cost of not achieving accurate flow metering can be errors from 1.0 to several percent in plant fuel measurement. Since there are many error mechanisms that cause meters to read high (over register), and fewer that cause meters to under register, and since a few percent of a power plants fuel bill is a high cost, it becomes worth the effort, on the part of plant operators and engineers, to learn about, inspect, calibrate, and be concerned about their flow metering systems. It will be shown in this paper that the cost of poor measurement is greater than the cost of obtaining good measurement. As a result, power plant engineers need to make the effort to avid deficiencies and errors in gas metering.
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