Reduction through Brick Wall Barrier and Acoustic Sponge of Environmental Noise Levels from Chiller Cooling System

Year 2020, Volume: 24 Issue: 4, 637 - 651, 01.08.2020

Fatih Tufaner

https://doi.org/10.16984/saufenbilder.563256

Abstract

The aim of this study was to investigate the noise level reduction of the air cooled liquid chiller to the desired levels of environmental noise requisite. Noise control procedures are implemented with various systems to prevent environmental noise disturbances. This paper examines the application of a passive noise control approach to the control of air-cooled liquid chiller noise located in the garden of an official institution. The approach of passive noise control utilizing brick walls with acoustic sponge in the immediate vicinity of the chiller is discussed. When the chiller was covered with a brick wall, the noise level was reduced by 5.5 Leq dBA 1 m away from the nearest residence. However, this reduction could not meet the requirements of legal regulations. Therefore, the inside of brick wall was covered with acoustic sponge. As a result, the ambient noise level where 1m away from the nearest residence to the chiller has been reduced to the background noise levels with a total reduction of about 8.5 Leq dBA. It is shown that, due to the noise produced by the chiller fans and compressors, so as to achieve significantly cognizable levels of noise reduction it is necessary to isolation brick walls with acoustic sponge.

Keywords

Noise control, reduction, chiller, barrier, acoustic sponge

References

• [1] J. Cheer, S. J. Elliott, "Active noise control of a diesel generator in a luxury yacht", Applied Acoustics, vol. 105, pp. 209-214, 2016.
• [2] J. Landaluze, I. Portilla, J. Pagalday, A. Martı́nez, R. Reyero, "Application of active noise control to an elevator cabin", Control Engineering Practice, vol. 11, no. 12, pp. 1423-1431, 2003.
• [3] E. Avşar, H. Erol, İ. Toröz, E. Piro, "Evaluation of environmental noise and vibration levels of dry type transformers and determination of solution alternatives: Istanbul case study", Bitlis Eren University Journal of Science vol. 8, no. 3, pp. 958-967, 2019.
• [4] G. S. Papini, R. L. Pinto, E. B. Medeiros, F. B. Coelho, "Hybrid approach to noise control of industrial exhaust systems", Applied Acoustics, vol. 125, pp. 102-112, 2017.
• [5] Y. J. Wong, R. Paurobally, J. Pan, "Hybrid active and passive control of fan noise", Applied Acoustics, vol. 64, no. 9, pp. 885-901, 2003.
• [6] N. Tandon, B. Nakra, D. Ubhe, N. Killa, "Noise control of engine driven portable generator set", Applied acoustics, vol. 55, no. 4, pp. 307-328, 1998.
• [7] H. Wang, P. Luo, M. Cai, "Calculation of noise barrier insertion loss based on varied vehicle frequencies", Applied Sciences, vol. 8, no. 1, pp. 100, 2018.
• [8] J. Moreland, R. Minto, "An example of in-plant noise reduction with an acoustical barrier", Applied Acoustics, vol. 9, no. 3, pp. 205-214, 1976.
• [9] S. B. Knight, J. B. Evans, C. N. Himmel, "Case study: Air cooled chillers with rotary helical (screw) compressors at hospital with impact on patient rooms, residential neighborhoods, and open park", The 2001 International Congress and Exhibition on Noise Control Engineering, pp. 1-5, 2001.
• [10] J. A. Paulauskis, "Addressing noise problems in screw chillers", ASHRAE Journal, vol. 41, pp. 22-27, 1999.
• [11] J. B. Evans, C. N. Himmel, J. D. Leasure, "Environmental noise case studies: Air-cooled refrigeration chiller installations near residential structures", ASHRAE Transactions, vol. 118, no. 2, pp. 50-58, 2012.
• [12] T. Van Renterghem, J. Forssén, K. Attenborough, P. Jean, J. Defrance, M. Hornikx, et al., "Using natural means to reduce surface transport noise during propagation outdoors", Applied Acoustics, vol. 92, pp. 86-101, 2015.
• [13] T. G. Hawkins, "Studies and research regarding sound reduction materials with the purpose of reducing sound pollution", [Master Thesis]. San Luis Obispo: California Polytechnic State University; 2014.
• [14] A. Shalool, N. Zainal, K. B. Gan, C. Umat, "An investigation of passive and active noise reduction using commercial and standard TDH-49 headphones", Advances in Electrical, Electronic and Systems Engineering (ICAEES), pp. 606-609, 2016.
• [15] ISO_9613-2, "Acoustics – Attenuation of sound during propagation outdoors - Part 2: General method of calculation", International Organisation for Standards, ISO, 1996.
• [16] T. Isei, T. Embleton, J. Piercy, "Noise reduction by barriers on finite impedance ground", The Journal of the Acoustical Society of America, vol. 67, no. 1, pp. 46-58, 1980.
• [17] Y. W. Lam, "A boundary element method for the calculation of noise barrier insertion loss in the presence of atmospheric turbulence", Applied Acoustics, vol. 65, no. 6, pp. 583-603, 2004.
• [18] T. Ishizuka, K. Fujiwara, "Performance of noise barriers with various edge shapes and acoustical conditions", Applied Acoustics, vol. 65, no. 2, pp. 125-141, 2004.
• [19] G. Syms, "Acoustic upgrades to wind tunnels at the national research council canada", 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference) pp. 2180, 2012.
• [20] P. Reiter, R. Wehr, H. Ziegelwanger, "Simulation and measurement of noise barrier sound-reflection properties", Applied Acoustics, vol. 123, pp. 133-142, 2017.
• [21] B. Botterman, G. D. de la Grée, M. Hornikx, Q. Yu, H. Brouwers, "Modelling and optimization of the sound absorption of wood-wool cement boards", Applied Acoustics, vol. 129, pp. 144-154, 2018.
• [22] G. Sung, J. S. Kim, J. H. Kim, "Sound absorption behavior of flexible polyurethane foams including high molecular‐weight copolymer polyol", Polymers for Advanced Technologies, vol. 29, no. 2, pp. 852-859, 2018.
• [23] S. Chen, Y. Jiang, J. Chen, D. Wang, "The effects of various additive components on the sound absorption performances of polyurethane foams", Advances in Materials Science and Engineering, vol. 2015, 2015.
• [24] H. Choe, J. H. Kim, "Reactivity of isophorone diisocyanate in fabrications of polyurethane foams for improved acoustic and mechanical properties", Journal of Industrial and Engineering Chemistry, vol. 69, pp. 153-160, 2019.
• [25] ÇGDY, "Regulations for Assessment and Management of Environmental Noise (ÇGDY). Official Gazette No. 27601 dated June 4, 2010 and revised in Official Gazette No. 27917 dated April 27", 2011.
• [26] B. Berglund, T. Lindvall, D. H. Schwela (1995) "Guidelines for community noise", World Health Organization (WHO). https://pdfs.semanticscholar.org/a95a/a1341e20ef356ac4c25fdfef43894b4b97e9.pdf. Accessed 6 December 2018
• [27] E. Murphy, E. King, "Environmental noise pollution: Noise mapping, public health, and policy", Newnes; 2014.
• [28] ISO_1996-2, "Acoustics – Attenuation of sound during propagation outdoors – Part 2: General method of calculation", International Organisation for Standards, ISO, 2007.
• [29] BS_4142, "Method for rating industrial noise affecting mixed residential and industrial areas", BS: British Standards Institution, 1997.
• [30] ISO_1996-1, "Acoustics – Description, measurement and assessment of environmental noise – Part 1: Basic quantities and assessment procedures", International Organisation for Standards, ISO, 2003.
• [31] L. L. Beranek, I. L. Ver, "Noise and vibration control engineering-principles and applications", Noise and vibration control engineering-Principles and applications John Wiley & Sons, Inc, 814 p, 1992.
• [32] ISO_3745, "Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Precision methods for anechoic rooms and hemi-anechoic rooms", ISO: International Organization of Standards Geneva, Switzerland, 2012.
• [33] U. Ayr, E. Cirillo, I. Fato, F. Martellotta, "A new approach to assessing the performance of noise indices in buildings", Applied acoustics, vol. 64, no. 2, pp. 129-145, 2003.
• [34] S. Kuwano, "Advantages and disadvantages of A-weighted sound pressure level in relation to subjective impression of environmental noises", Noise Control Eng J, vol. 33, pp. 107-115, 1989.
• [35] S. Namba, S. Kuwano, "Psychological study on Leq as a measure of loudness of various kinds of noises", Journal of the Acoustical Society of Japan (E), vol. 5, no. 3, pp. 135-148, 1984.
• [36] M. J. Crocker, "Handbook of noise and vibration control", John Wiley & Sons; 2007.
• [37] D. A. Bies, C. Hansen, C. Howard, "Engineering noise control", CRC press; 2017.
• [38] Y. Soeta, R. Shimokura, "Sound quality evaluation of air-conditioner noise based on factors of the autocorrelation function", Applied Acoustics, vol. 124, pp. 11-19, 2017.
• [39] S. Tang, S. Chu, "Noise level distribution functions for outdoor applications", Journal of Sound and Vibration, vol. 248, no. 5, pp. 887-911, 2001.
• [40] D. W. Robinson, "Towards a unified system of noise assessment", Journal of Sound and Vibration, vol. 14, no. 3, pp. 279-298, 1971.
• [41] Y. Avşar, M. T. Gönüllü, "Determination of safe distance between roadway and school buildings to get acceptable school outdoor noise level by using noise barriers", Build Environ, vol. 40, no. 9, pp. 1255-1260, 2005.
• [42] F. J. Langdon, W. Scholes, "The Traffic Noise Index: A Method of Controlling Noise Nuisance", 1968.
• [43] R. B. Hunashal, Y. B. Patil, "Assessment of noise pollution indices in the city of Kolhapur, India", Procedia-Social and Behavioral Sciences, vol. 37, pp. 448-457, 2012.
• [44] Johnson_Controls (2015) "Model YVAA style a air-cooled screw liquid chillers with variable speed drive frame sizes", Johnson Controls. https://www.johnsoncontrols.com/en_id/~/media/jci/be/united-states/hvac-equipment/chillers/files/be_yvaa_res_maintenanceguide.pdf?la=en. Accessed 04 July 2018.
• [45] Johnson_Controls (2004) "Latitude air-cooled chillers", YORK International Corporation. https://www.johnsoncontrols.com/-/media/jci/be/united-states/hvac-equipment/chillers/files/be_yciv_ycav_res_salesguide.pdf?la=en. Accessed 04 July 2018.