A different solution is available to reduce the noise emitted through the piping.
Qualification of the Duct Resonator Array (DRA) technology has been performed by Statoil ASA. Sandra Rodiño Palacios presents the paper on the Pipe Duct Resonator Array (PDRA) for installation up/downstream of the compressor. This technology is a development of Dresser-Rand's DRA for installation in the stator section of their compressors. The PDRA is designed to attenuate blade passage frequency noise from the compressor; large attenuations are available over limited bandwidths.
Measurements on compressor pipework show deviations to predictions. Frank Lemstad, Sinus as, presents results from detailed measurements on a compressor's pipework after the removal of pipe insulation. The results indicate that calculation methods for noise from pipework are conservative. Of particular interest is the use of PDRA on smaller compressor systems which may significantly reduce the need for pipe insulation.
Location: Norsk olje og gass, Forus
Presentations from the seminar:
Qualification of Duct Resonator Array for Noise Reduction in Offshore Installations.
Sandra Rodiño Palacios, Statoil ASA
Do we understand gas compressor pipe noise?
Frank Lemstad, Sinus as
Movie from the seminar can be seen here: