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Title: Compressor Flow Measurement Using A Tracer Technique
Author: Peter L. Lagus, Brian S. Flanagan, Michael E. Peterson, Sam L. Clowney
Source: American Gas Association 1990
Year Published: 1990
Abstract: The objective of this program was to demonstrate the viability and utility of a constant flow tracer dilution technique for inferring the fiowrale through an operating natural gas centrifugal compressor for test or analysis purposes. This technique entails introducing a constant known flowrate of tracer into a flowing stream and measuring the equilibrium concentration of tracer downstream from the injection point. This technique is unaffected by pulsation of the natural gas stream and/or piping configuration upstream or downstream of the compressor. Under the assumption of good mixing, the injection flowrate divided by the equilibrium concentration measured downstream is equal to the stream flowrate. A phased program of field testing and instrument development has resulted in a field-usable system capable of inferring the flowrate through an operating natural gas centrifugal compressor to a precision of better than 2 percent. A description of the hardware is followed by data from a number of field trials at natural gas compressor stations in North America.

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