Volume 13, Issue 3 (10-2017)
J Health Syst Res 2017, 13(3): 347-352 |
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Forouharmajd F, Ashrafian S. An Investigation of the Effect of the Use of Absorptive Pod Silencer on Reduction of Noise produced by the Air Inlet Channel of Iranian Centrifugal Fans. J Health Syst Res 2017; 13 (3) :347-352
URL: http://hsr.mui.ac.ir/article-1-953-en.html
URL: http://hsr.mui.ac.ir/article-1-953-en.html
1- Assistant Professor, Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
2- MSc Student, Student Research Committee AND Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
2- MSc Student, Student Research Committee AND Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract: (1264 Views)
Background: Centrifugal fans are extensive industrial used and transfer large volumes of air to industrial equipment such as boilers. These fans are one of the important sources of noise in industries. Therefore, the present study investigated the effect of the use of absorption silencer on reducing the low frequency sound of Iranian centrifugal fans.Methods: The studied fan had a diameter of 55 cm, speed of 2980 cycles, and air flow of 300 cubic meters per hour. In addition, the silencer was built with galvanized iron walls with a thickness of 3 mm, and a central axis with a diameter of 5 and length of 100 cm. Inside the silencer and around its central axis were covered with glass fiber as sound absorbing material.Findings: The maximum noise reduction was 12 dB in low frequencies. However, increase in diameter and density of the sound absorbing material resulted in a greater reduction in noise.Conclusion: According to the results, absorptive silencer with glass fiber and flexi absorber with a thickness of 10 cm and density of 40 kg/m3 can be used to achieve the desired noise reduction in centrifugal fans.
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2017/10/15 | Published: 2017/10/15
Received: 2020/07/16 | Accepted: 2017/10/15 | Published: 2017/10/15
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