Continued regulatory pressure necessitates the use of precisely designed turbochargers to create the design trapped equivalence ratio within large-bore stationary engines used in the natural gas transmission industry. The upgraded turbochargers scavenge the exhaust gases from the cylinder, and create the air manifold pressure and backpressure on the engine necessary to achieve a specific trapped mass. This combination serves to achieve the emissions reduction required by regulatory agencies. Many engine owner/operators request that an upgraded turbocharger be tested prior to installing the turbocharger on the engine. The purpose of the test is to prevent field hardware iterations that are oftentimes necessary for the turbocharger to meet the air specification on the particular engine. Reworking a turbocharger due to not meeting the airflow and pressure requirement for emissions purposes can be quite costly and in many cases easily discovered through test-cell performance testing. Confirming the as-built turbocharger design specification prior to transporting the turbocharger to the field can decrease downtime and installation costs. There are, however, technical challenges that must be overcome to compare test-cell data to field conditions. This paper discusses the corrections that must be made to the test-cell data in order to determine how the turbocharger will perform on the engine. As the litmus test of the new testing system, performance data is corrected to site conditions verifying the air specification as designed by the end user. The correction method utilized herein is the ASME Power Test Code 10 (PTC-10) version 1997. Performance test data and the compressor map are corrected with the PTC-10 method to field conditions verifying turbocharger site performance before installation. After installation, data collected from the turbocharger operating on engine is compared with test corrected data, authenticating the turbocharger testing system and correction methods.

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