Green Shipping—Multifunctional Marine Scrubbers for Emission Control: Silencing Effect
Source abstract
Abstract
Scrubber systems abate the sulphur oxide emissions of engines when cheap fuel oils that are high in sulphur content are employed as combustibles. However, the ships with these voluminous devices installed on board is space demanding. This work analyses the feasibility of incorporating the acoustic abatement of the exhaust gas noise functionality into the scrubber design to provide a combined scrubber–silencer system. For this purpose, a finite element analysis is performed on a simple expansion chamber, which is assessed using both analytical and experimental data. The transmission loss is the acoustic parameter chosen in this work. The numerical model depicts a good correlation with the transmission loss measured on a model scale scrubber. Finally, scrubber geometry modifications alter the transmission loss, changing and/or enhancing its featuring. These abilities indicate the feasibility to confer to scrubber silencing effects.
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Research context
OpenAlex topics: Aerodynamics and Fluid Dynamics Research · Engineering Applied Research · Maritime Transport Emissions and Efficiency
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Engineering and Architecture, University of Trieste, Via Alfonso Valerio 6, 34127 Trieste, Italy
Maritime Safety Research Centre, Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow G4OLZ, UK
Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
Funding
ABE-Abbattimento delle emissioni vibroacustiche e chimiche in ambito navale” project funded by Regione Autonoma Friuli Venezia Giulia, POR-FESR 2014-2020
References (38)
Show source-provided references
1. Design and Evaluation of an Integrated SCR and Exhaust Muffler from Marine Diesels10.1007/s00773-014-0302-1 ↗
2. MARPOL 73/78 (2008). Annex VI-Regulations for the Prevention of Air Pollution from Ships, Chapter 3-Requirements for Control of Emissions from Ships, Regulation 13—Nitrogen Oxides (NOx), International Maritime Organization (IMO).
3. MARPOL 73/78 (2008). Annex VI-Regulations for the Prevention of Air Pollution from Ships, Chapter 3-Requirements for Control of Emissions from Ships, Regulation 14- Sulphure Oxides (SOx), International Maritime Organization (IMO).
4. Meeting Future Emission Regulation at Sea by Combining Low-Pressure EGR and Seawater Scrubbing10.1007/s00773-019-00655-y ↗
5. Reducing Sulfur and Nitrogen Emissions in Shipping Economically10.1016/j.trd.2020.102641 ↗
6. Johnsen, K., Kock, F., Strøm, A., and Chryssakis, C. (2020, December 22). Global Sulphur Cap 2020 Update. Available online: https://www.dnvgl.com/maritime/publications/global-sulphur-cap-2020.html.
7. (2021, February 22). Oil Price Information. Available online: https://www.petrolbunkering.com/price-information/.
8. Sulphur Abatement Globally in Maritime Shipping10.1016/j.trd.2017.09.028 ↗
9. (2020, December 29). Scrubbers Shown to Have Lower Climate Impact than Low-Sulphur Fuel, Wärtsilä Corporation. Available online: https://Www.Wartsila.Com/Media/News/22-09-2020-Scrubbers-Shown-to-Have-Lower-Climate-Impact-than-Low-Sulphur-Fuel-2786812.
10. Green Shipping: Marine Engine Pollution Abatement Using a Combined Catalyst/Seawater Scrubber System. 1. Effect of Catalyst10.1016/j.jcat.2014.12.013 ↗
11. International Maritime Organization (2012). Resolution MSC.337(91), Code on Noise Levels on Board Schips, IMO.
12. (2020, December 28). Lloyd’s Register, ShipRight procedures, Additional Design & Construction Procedure (ADP), Procedure for the Determination of Airborne Noise Emissions from Marine Vessels, January 2019. Available online: https://www.lr.org/en/shipright-procedures/#accordion-additionaldesign&constructionprocedure(adp).
13. (2019). NAM KyoungHun. Scrubber with Noise Reduction on Ship. (KR102039134 (B1)), Korean Patent.
14. Review of Theoretical and Experimental Aspects of Acoustical Modeling of Engine Exhaust Systems10.1121/1.408746 ↗
15. A Review of Current Techniques for Measuring Muffler Transmission Loss
16. Beranek, L.L., and Ver, I.L. (2005). Noise and Vibration Control Engineering, John Wiley & Sons, Inc.. [2nd ed.].
17. Dokumaci, E. (2021). Duct Acoustics: Fundamentals and Applications to Mufflers and Silencers, Cambridge University Press.10.1017/9781108887656 ↗
18. Crocker, M.J. (2007). Exhaust and intake noise and acoustical design of mufflers and silencers. Handbook of Noise and Vibration Control, John Wiley & Sons, Inc.. Chapter 85.
19. Transfer Function Method of Measuring In-duct Acoustic Properties. II. Experiment10.1121/1.384779 ↗
20. Transfer Function Method of Measuring In-duct Acoustic Properties. I. Theory10.1121/1.384778 ↗
21. (2001). ISO 10534: Acoustics—Determination of Sound Absorption Coefficient and Impedance in Impedances Tubes—Part 2: Transfer Function Method, International Organization for Standardization.
22. Munjal, M.L. (2014). Acoustics of Ducts and Mufflers, John Wiley & Sons, Inc.. [2nd ed.].
23. Theory of a Two Source-Location Method for Direct Experimental Evaluation of the Four-Pole Parametersof an Acoustic Element10.1016/0022-460X(90)90843-O ↗
24. Zhang, H., Fan, W., and Guo, L.-X. (2018). A CFD Results-Based Approach to Investigating Acoustic Attenuation Performance and Pressure Loss of Car Perforated Tube Silencers. Appl. Sci., 8.10.3390/app8040545 ↗
25. Transmission Loss Prediction of Reactive Silencers Using 3-D Time-Domain CFD Approach and Plane Wave Decomposition Technique10.1016/j.apacoust.2016.05.004 ↗
26. Study of Transmission Loss on Muffler10.19026/rjaset.5.4235 ↗
27. Analysis of Exhaust Muffler with Micro-Perforated Panel
28. Method to Resolve Microphone and Sample Location Errors in the Two-Microphone Duct Measurement Method10.1121/1.1314318 ↗
29. MSC Software-Hexagon (2020). Actran 2020 User’s Guide, Volume, Installation, Operations, Theory and Utilities, Free Field Technologies.
30. Marburg, S., and Nolte, B. (2008). Computational Acoustics of Noise Propagation in Fluids: Finite and Boundary Element Methods, Springer.10.1007/978-3-540-77448-8 ↗
31. Six boundary elements per wavelength: Is that enough?10.1142/S0218396X02001401 ↗
32. Kurowski, P.M. (2017). Finite Element Analysis for Design Engineers, SAE International. [2nd ed.].10.4271/R-449 ↗
33. Potential of Microperforated Panel Absorber10.1121/1.423870 ↗
34. Wartsila Italia S.p.A. Personal communication.
35. Impedance-Matching Acoustic Bend Composed of Perforated Plates and Side Pipes10.1063/1.4996848 ↗
36. Classifying Human Audiometric Phenotypes of Age-Related Hearing Loss from Animal Models10.1007/s10162-013-0396-x ↗
37. The Theory of the Propagation of Plane Sound Waves in Tubes10.1088/0370-1301/66/8/310 ↗
38. Gao, Z., Saine, K., Hynninen, A., and Tanttari, J. (2019, January 7–11). Large engine exhaust noise in real life and measurement techniques in practice. Proceedings of the 26th International Congress on Sound and Vibration, Montreal, QC, Canada.