Site Performance Testing of Centrifugal Compressors and Gas Turbine Drivers

Abstract

While factory performance tests for compressors and gas turbines are well defined in ASME power test codes, and can be performed under well controlled conditions, site performance tests must be performed under the conditions available at site. This requires methods to bring the compressor to valid operating conditions, as well as the capability to provide steady state operating conditions. Understanding compressor controls, available recycle and cooling capability, and the impact of the process requirements are crucial for successful tests. Limitations may come from the instrumentation that can be installed based on the site installation, and the impact of limited instrumentation is discussed. Compressor drivers also may impose limitations but also offer the capability for redundant measurements of certain parameters. Due to these constraints, the appropriate calculation of test uncertainties is vital, and the concepts of test uncertainty calculations is discussed and illustrated. This paper also provides insight into the necessary instrumentation and its calibration, the requirement for obtaining an accurate gas composition, and methods to obtain representative test points, as well as troubleshooting advice and methods to verify data.