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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Capstone Model C30 Acoustic Emissions Typically, either the 1.6 kHz or the 3.2 kHz (one-third octave) bands dominate the overall noise levels. In Table 2, the case radiated sound power was estimated by subtracting the inlet and exhaust sound power levels from the open package sound power levels. Table 2. Sound Power Levels (dBA) Based on Measurements Near the Standard Package or Simple Cycle Open Package Frequency 400 Hz Standard Package (dBA) Simple Cycle Open Package with Inlet Silencer (Treatment - Note1) (dBA) Simple Cycle Open Package (dBA) 1.6 kHz 3.2 kHz 16 kHz Overall dBA 84 82 93 74 97 85 85 93 96 101 105 83 97 103 109 Note 1: The Treatment (referred to as the Inlet Silencer) is the physical and mechanical noise abatement arrangements for the Simple Cycle Open Package. These results show that removing the enclosure increased the overall radiated sound power by 6 dBA. Removing the inlet increased the sound power level another 6 dBA. The loudest location was directly above the package. The sources of the noise emitted from the top of the package are the exhaust noise, and the case-radiated noise, since the electronics cooling flow is discharged through the top of the package. Noise from the top of the package may be influencing the noise levels at other locations as well. Though the noise levels on the top of the package were not measured on the industrial package, the noise emitted from the top of the package should be much less, because the electronics cooling flow is directed out of the rear of the package via a silencer. 410025-001 Rev A (September 2002) Page 4 of 36 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Guide for Capstone Turbine Model Number
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