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In 2009, El Paso and SwRI investigated changes to the pulsation filter bottles and piping system at the Elk Basin Station utilizing orifice plates, side branch absorbers, and a modified piping system. The original objective of the study was to alleviate high piping vibrations, particularly when single acting the compressor. During this station upgrading effort, the compressor cylinder nozzle orifice plates were replaced with the pressure recovery insert (PRI) nozzle, developed through the GMRC Pulsation Research Program. This paper will report on the benefits of the PRI nozzle compared to conventional orifice plates based on field testing performed after the station modifications (2009-2010). The field tests determined the pressure loss across the first and second stages of compression as well as the reduction in pipe vibrations due to the overall improvement in pulsation levels in the flow stream. The PRI nozzle’s ability to control high frequency pulsations due to compressor cylinder nozzle resonance while recovering pressure losses (unlike an orifice plate) makes it a preferred option for efficient operation of reciprocating compressors. The test results will also review the PRI nozzle performance over a range of pressure ratios compared to an orifice plate based on both field testing and laboratory results.
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List Price $195.00