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Title: Ultrasonic Flowmeter For Coal Seam Gas Application
Author: Lei Sui Randy S. Pfenninger Toan H. Nguyen Nicholas A. Hobbs Isaac Sadovnik Liguo Su James E. Matson
Source: Flomeko 2013
Year Published: 2013
Abstract: The use of ultrasound to measure flow is now well established with many installations worldwide in chemical and petrochemical plants, and refineries. In general, it is more challenging to apply ultrasonic techniques to gas flow measurement than liquid due to a variety of reasons, including the much lower acoustic impedance, higher Mach numbers, higher turn-down ratios, and larger pressure variations, associated with gas flow measurement. In this paper, ultrasonic flowmetering of Coal Seam Gas (CSG) or Coal Bed Methane Gas (CBMG) is investigated and reported. A theoretical model has been developed to understand how the received ultrasound signal strength changes with temperature, pressure and gas contents.

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