Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant
Background and Objective: A practical method for noise control in environments with different noise sources is designing an acoustic cabin for the workers. In this regard, this study aimed to assess the efficiency of the acoustic cabin in a typical turbine unit of a thermal power plant to provide ac...
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| Format: | Article |
| Language: | fas |
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Hamadan University of Medical Sciences
2019-06-01
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| Series: | Muhandisī-i bihdāsht-i ḥirfah/ī |
| Subjects: | |
| Online Access: | http://johe.umsha.ac.ir/article-1-299-en.pdf |
| _version_ | 1819032366532788224 |
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| author | Rostam Golmohammadi Mohsen Aliabadi Masoud Shafiee Motlagh Rahim Goodarzi |
| author_facet | Rostam Golmohammadi Mohsen Aliabadi Masoud Shafiee Motlagh Rahim Goodarzi |
| author_sort | Rostam Golmohammadi |
| collection | DOAJ |
| description | Background and Objective: A practical method for noise control in environments with different noise sources is designing an acoustic cabin for the workers. In this regard, this study aimed to assess the efficiency of the acoustic cabin in a typical turbine unit of a thermal power plant to provide acoustic comfort.
Materials and Methods: Measurement of the noise level and spectrum, as well as vibration as exposed to whole body were conducted using sound level meter Brüel & Kjær 2260 Sound Level Meter; Denmark model 2260. The acoustic cabin was designed using sandwich panel structure based on standard ISO 15667. The composition of cabin walls with 104 mm total thickness from outside to inside included 2 mm steel sheet, 40 mm polyurethane foam with a density of 50 kg/m3, 2 mm steel sheet,50 mm rock wool with a density of 120 kg/m3, and 10 mm plaster tile, respectively. It should be noted that the floating floor was implemented for the reduction of transmitted vibration to the cabin.
Results: The obtained results indicated that the means of noise levels equivalent to sound pressure were approximately 89.5 and 50.7 dB outside and inside the designed cabin, respectively, resulting in an overall noise reduction of 40 dB. The results demonstrated that an acceleration level of vibration as exposed to the whole body inside the cabin was lower than the comfort vibration limit of 0.145 m/s2.
Conclusion: In order to design a high-efficiency acoustic cabin, the selection of material types, thickness, and density is critical to optimize the overall sound transmission of the walls. Therefore, the results confirmed that in designing the acoustic cabinet, sandwich panels with adequate mass, low hardness coefficient, and high damping can provide optimal acoustic conditions. |
| first_indexed | 2024-12-21T07:00:48Z |
| format | Article |
| id | doaj.art-6526e3a4d6fc488b974299a3b84413dd |
| institution | Directory Open Access Journal |
| issn | 2383-3378 2383-3378 |
| language | fas |
| last_indexed | 2024-12-21T07:00:48Z |
| publishDate | 2019-06-01 |
| publisher | Hamadan University of Medical Sciences |
| record_format | Article |
| series | Muhandisī-i bihdāsht-i ḥirfah/ī |
| spelling | doaj.art-6526e3a4d6fc488b974299a3b84413dd2022-12-21T19:12:13ZfasHamadan University of Medical SciencesMuhandisī-i bihdāsht-i ḥirfah/ī2383-33782383-33782019-06-01611710.29252/jech.6.1.1Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power PlantRostam Golmohammadi0Mohsen Aliabadi1Masoud Shafiee Motlagh2Rahim Goodarzi3Department of Occupational Hygiene, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran Associate Professor, Department of Occupational Hygiene, School of Public Health and Occupational Health and Safety Research Center, Hamadan University of Medical Sciences, Hamadan, Iran PhD, Department of Occupational Hygiene, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, IranDepartment of Health, Safety, and Environment, Shazand Power Plant, Arak, IranBackground and Objective: A practical method for noise control in environments with different noise sources is designing an acoustic cabin for the workers. In this regard, this study aimed to assess the efficiency of the acoustic cabin in a typical turbine unit of a thermal power plant to provide acoustic comfort. Materials and Methods: Measurement of the noise level and spectrum, as well as vibration as exposed to whole body were conducted using sound level meter Brüel & Kjær 2260 Sound Level Meter; Denmark model 2260. The acoustic cabin was designed using sandwich panel structure based on standard ISO 15667. The composition of cabin walls with 104 mm total thickness from outside to inside included 2 mm steel sheet, 40 mm polyurethane foam with a density of 50 kg/m3, 2 mm steel sheet,50 mm rock wool with a density of 120 kg/m3, and 10 mm plaster tile, respectively. It should be noted that the floating floor was implemented for the reduction of transmitted vibration to the cabin. Results: The obtained results indicated that the means of noise levels equivalent to sound pressure were approximately 89.5 and 50.7 dB outside and inside the designed cabin, respectively, resulting in an overall noise reduction of 40 dB. The results demonstrated that an acceleration level of vibration as exposed to the whole body inside the cabin was lower than the comfort vibration limit of 0.145 m/s2. Conclusion: In order to design a high-efficiency acoustic cabin, the selection of material types, thickness, and density is critical to optimize the overall sound transmission of the walls. Therefore, the results confirmed that in designing the acoustic cabinet, sandwich panels with adequate mass, low hardness coefficient, and high damping can provide optimal acoustic conditions.http://johe.umsha.ac.ir/article-1-299-en.pdfAcoustic CabinAcoustic ComfortEfficiency AssessmentThermal Power Plant |
| spellingShingle | Rostam Golmohammadi Mohsen Aliabadi Masoud Shafiee Motlagh Rahim Goodarzi Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant Muhandisī-i bihdāsht-i ḥirfah/ī Acoustic Cabin Acoustic Comfort Efficiency Assessment Thermal Power Plant |
| title | Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant |
| title_full | Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant |
| title_fullStr | Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant |
| title_full_unstemmed | Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant |
| title_short | Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant |
| title_sort | efficiency assessment of acoustic cabin for providing acoustic comfort in turbine unit of a thermal power plant |
| topic | Acoustic Cabin Acoustic Comfort Efficiency Assessment Thermal Power Plant |
| url | http://johe.umsha.ac.ir/article-1-299-en.pdf |
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