SOUND REDUCTION FOR COPELAND MIDSIZE SEMIHERMETIC COMPRESSORS USING EXPERTMENTAL METHODS

摘要

In general the refrigeration market for the Semi-Hermetic compressors requires low noise and low cost. To meet these goals, an existing midsize compressor was studied. The dominant noise source of the compressor was identified as its discharge valve system. Engineering changes were made and the sound power dropped by 6.8 dBA. Although the change also led to capacity reduction by 2%, this small loss was tolerable for the sound power reduction.