Designing and Manufacturing a Noise Controlling Silencer for the Cooling Tower Pump of Sarcheshmeh Copper Power Station
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Background
One of the most common harmful factors in the workplace is noise. Noise control is a factor beneficial for health and safety in the workplace.
Objectives
The current study aimed to design and manufacture a silencer for the cooling tower pump of Sarcheshmeh Copper power station in order to control noise.
Methods
In this study, sound pressure level was measured by the use of a sound level meter (B & K 2260). Measurement was carried out in the light of ISO 1996 standard. After studying technical and acoustic features of the noise source, a dispersive-absorptive silencer was designed to control noise pollution generated by the cooling tower pump of the thermal station. After analyzing the frequencies of sound pressure level and using available data, a cylindrical silencer (with a diameter of 1.5 m and height of 3 m) was designed and manufactured. The internal part of the silencer was filled with different columns of absorbent material covered with punched metal. Therefore, the silencer consisted of (1) acoustic diffuser, (2) acoustic chamber, and (3) acoustic channels.
Results
Measurements showed that, at a distance of 1 m from the source, sound pressure level reduced from 127 dBA before installing the silencer to 79 dBA after the installation, resulting in a reduction of 48 dBA.
Conclusions
Using a silencer with absorbent material (glass wool) is very effective in reducing the noise generated by the pump.
Language:
English
Published:
Jundishapur Journal of Health Sciences, Volume:9 Issue: 4, Oct 2017
Page:
2
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