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Workshop on Industrial Noise Calculations

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Workshop on Industrial Noise Calculations Richard.spaans_at_dcmr.nl Hans.vanderwaal_at_dcmr.nl Hans van der Waal training G2G Serbia Hans van der Waal training G2G ... – PowerPoint PPT presentation

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Date added: 16 August 2019
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Title: Workshop on Industrial Noise Calculations


1
Workshop on Industrial Noise Calculations
  • Richard.spaans_at_dcmr.nl
  • Hans.vanderwaal_at_dcmr.nl

2
Content
  1. Previously
  2. Representative operations for noise emission
  3. Sound Power Levels
  4. Calculation model
  5. Calculations
  6. Validation of calculations
  7. Topographic data, contours
  8. Conclusions

3
Previously2nd training mission February
2012Noise from industrial sites - Henk Wolfert
EPA
Data from enterprises and vicinity
Definition of input, conversion
Noise calculations
Validation
Production of contours
Presentation
Noise from source to receiver
19-5-2015
3
Workshop on Industrial Noise Calculations
4
Previously2nd training mission February
2012Noise from industrial sites - Henk Wolfert
EPA
Free field measurement (ISO 3744)
19-5-2015
4
Workshop on Industrial Noise Calculations
5
Previously2nd training mission February
2012Noise from industrial sites - Henk Wolfert
EPA
Enveloping measurement surface (ISO 3746)
19-5-2015
5
Workshop on Industrial Noise Calculations
6
Previously2nd training mission February
2012Noise from industrial sites - Henk Wolfert
EPA
  • Noise calculations according to ISO 9613-2
  • Divergence (distance reduction)
  • Atmospheric absorption
  • Ground effect (absorption/reflection)
  • Screening by barriers/objects, etc
  • Reflections near receptor
  • Miscellaneous effects, like
  • Reductions in residential areas/installations
  • Propagation through forests

Formula LfT LW Dc -A A
AdivAatmAgrAbarAmisc
19-5-2015
6
Workshop on Industrial Noise Calculations
7
Previously2nd training mission February
2012Noise from industrial sites - Henk Wolfert
EPA
EPA
Screening by obstacles
Dz10lg3(c2/?)c3zKmet per pathway C2 20 (due
to ground effect) C3 1 for single barriers For
double C31(5 ?/e)2/(1/3)(5 ?/e)2 ?
wavelength Zdiffraction direct-indirect edistan
ce between edges (2) Kmet meteo correction,see
ISO Kmetexp-(1/2000vdss.dsr.d/2z)
Shape and top are important!!
Max. Reduction 15-20 dB
At least 10 kg/m2
19-5-2015
7
Workshop on Industrial Noise Calculations
8
Previously2nd training mission February
2012Noise from industrial sites - Henk Wolfert
EPA
19-5-2015
8
Workshop on Industrial Noise Calculations
9
Previously1st training mission November
2011G2G Training Momir Prascevic, PhD
EPA
19-5-2015
9
Workshop on Industrial Noise Calculations
10
Previously1st training mission November
2011G2G Training Momir Prascevic, PhD
EPA
19-5-2015
10
Workshop on Industrial Noise Calculations
11
Previously1st training mission November
2011G2G Training Momir Prascevic, PhD
EPA
19-5-2015
11
Workshop on Industrial Noise Calculations
12
Previously1st training mission November
2011G2G Training Momir Prascevic, PhD
EPA
19-5-2015
12
Workshop on Industrial Noise Calculations
13
Representative operations for noise emissionWhat
to do?
EPA
  • Determine relevant noise sources for noise
    emission
  • Depends on the evaluation parameter
  • Lden or Lday and Lnight averaging over 1 year
  • NL 12 days with incidental operations are
    excluded -gt 13th busiest day is determinative
  • For example unloading chemical tankers with
    deepwell pumps 1 day per week
  • Averaging over 1 year -gt -8 dB (1/7)
  • NL -0 dB

19-5-2015
13
Workshop on Industrial Noise Calculations
14
Representative operations for noise emissionHow
to do?
EPA
  • Visit the company
  • Interview an operations manager and determine
  • Relevant noise sources for Sound Power Level
  • The noisiest ones first...
  • Relevant noise sources for quantity and operating
    time
  • A lot of little ones makes a big one...

19-5-2015
14
Workshop on Industrial Noise Calculations
15
Representative operations for noise emissionCase
Port of Beograd
EPA
  • Open GeoMilieu and open Project GeoMilieu Models
  • Open model Case 01
  • http//binged.it/zcNpXZ
  • http//binged.it/x505lZ

19-5-2015
15
Workshop on Industrial Noise Calculations
16
Representative operations for noise emissionCase
Port of Beograd
EPA
19-5-2015
16
Workshop on Industrial Noise Calculations
17
Sound Power Level of relevant noise
sourcesMethod of determination
EPA
  • Choose a method of determination SPL
  • Noise measurements
  • Most accurate and customized
  • Sometimes difficult due to background noise
  • Labor intensive
  • Literature data
  • Previous surveys
  • Databases, literature, publications
  • Data delivered by manufacturers
  • Emission value per m2 production surface

19-5-2015
17
Workshop on Industrial Noise Calculations
18
Sound Power Level of relevant noise sourcesNoise
measurements
EPA
  • Point sources ISO 3744
  • Surface sources ISO 3746
  • Noise emitting buildings HMRI II.7 (NL)
  • Sound pressure level inside building sound
    insulation of façade elements -gt SPL surface
    source

19-5-2015
18
Workshop on Industrial Noise Calculations
19
Sound Power Level of relevant noise sourcesSPL
from literature
EPA
  • Acquire all technical data of noise source
  • SPL from databases
  • Source DB (linked to Predictor/GeoMilieu)
  • Harmonoise database
  • SPL from literature, publications
  • VDI publications
  • Integrated low-noise design in process industry
  • SPL from manufacturer data
  • Beware of SPL measurements (Sound Pressure
    Level) instead of Sound Power Level!
  • Acquire all input data according to Appendix 3

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19
Workshop on Industrial Noise Calculations
20
Sound Power Level of relevant noise sourcesCase
Port of Beograd
EPA
  • Literature data of crane 85 dB(A) at 10 meters

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20
Workshop on Industrial Noise Calculations
21
Calculation model
EPA
  • Acquire input data of noise sources according to
    Appendix 3 (required input data industrial noise
    calculations)
  • From operations manager (during interview)
  • During noise measurements
  • From data sheets of manufacturer or literature
  • Acquire input data of surroundings and objects
  • Topographical maps
  • Altitude data of the terrain and buildings
  • Acquire input data of calculation points or grids
  • Calculation points at dwellings
  • Grid for calculation of contours

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21
Workshop on Industrial Noise Calculations
22
Calculation modelCase Port of Beograd
EPA
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22
Workshop on Industrial Noise Calculations
23
CalculationsCase Port of Beograd
EPA
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23
Workshop on Industrial Noise Calculations
24
  • Thank you for your attention!
  • Are there any questions?

19-5-2015
Hans van der Waal training G2G Serbia
24
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