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Title: A Different Approach To Total Energy Measurement
Author: William H. Clingman
Source: 1988 International School of Hydrocarbon Measurement
Year Published: 1988
Abstract: The Gas Research Institute (GRI) has partially funded an energy flowmeter development program at Precision Measurement Incorporated (PMI) and this paper presents an update of this work. The flowmeter consists of two components. There is a flow separator which splits off a small sample stream of gas in fixed proportion to the main flow stream. There is a Flow-Titrator which titrates the energy content of the sample stream and thereby determines the energy flow in the main stream. In the next section of this paper a more detailed description of the energy flowmeter is presented. The main focus now in the GRI program is the field testing of energy flowmeters at several sites. There are five field test sites involved. In all cases the flow separator is installed outdoors as a spool piece in a pipe line. The Flow-Titrator is installed in an instrument building. At each site the participating gas distribution company has installed in the main line a volumetric flowmeter in series with the spool piece. Also they have an instrument for measuring calorific value so that an independent measure of energy flow can be obtained. Flows at the different test sites range from 20,000 SCFH to 1,000,000 SCFH. Comparisons of the energy flowmeter with independent measurements are discussed in the third section of this paper.

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