Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5005271 | ISA Transactions | 2011 | 13 Pages |
Abstract
Although standards for orifice flow meter design, installation, and calibration are supported herein, noncompliant devices exist in many pilot-, lab-scale, and on-board applications. For these, a common calibration practice is to preserve the ideal square root relation and determine a device specific discharge coefficient value. This work provides theoretical and empirical analyses to support relaxing the square root relation between orifice pressure drop and flow rate for noncompliant devices. The resulting power law relation is shown to improve accuracy, precision, and rangeability. Whether a device specific square root or power law model is used, it requires off-line or in-line calibration data. As such, a power law calibration model may only be useful for on-board and small-scale applications.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Control and Systems Engineering
Authors
R. Russell Rhinehart, Solomon Gebreyohannes, Upasana Manimegalai Sridhar, Anirudh Patrachari, Md.S. Rahaman,