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Title: Installation Effects Of A Multi-Path Ultrasonic Meter By Flow Simulation And Experiments
Author: Fong-Ruey Yang, Jian-Yuan Chen, Jiuun-Haur Shaw , Cheng-Tsair Yang, Jeng-Zen Fang , Ze-Wei Wang, Kun-Hai Lin, Tsai-Wang Huang
Source: Flomeko 2007
Year Published: 2007
Abstract: Ultrasonic meters are used for custody transfer of natural gas since the AGA 9 was published in 1998. Recently, CPC cooperation, Taiwan entrusts Center for Measurement Standards (CMS) to investigate a modular design of a field-use ultrasonic metrology package. The purpose of this paper is to demonstrate partial results of the investigation on flow-filed effect on metering accuracy by using numerical and experimental approaches. The meter was installed downstream of an out-of-plane 150mm single elbow following a 400mm header. Averaged velocity of the meter is integrated over averaged velocities of all paths by applying suitable integration technique. With a typical case of flow conditioner installed 3.5D downstream of the 90 elbow, the flowrate metering deviated smaller than 0.6% except at the right downstream to the conditioner, say 2.5%. While in the experiments, an Instromet Q.sonic-3 meter placing 3.5D-43.5D downstream of an elbow showed error for each test scenario lie within 0.8%, with and without a flow conditioner. The results imply the validation of the simulation model and provide pipeline guide for further designing modular package.

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