238742b0-bd1b-4c23-8b32-a2061dad2cc520251003054516903wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT2224-34961790-507910.37394/232015http://wseas.org/wseas/cms.action?id=4031110202511020252110.37394/232015.2025.21https://wseas.com/journals/ead/2025.phpVentilation Assessments of e-Waste Recycling Facilities during Normal and Abnormal Operating ConditionsNeihad HussenAl-KhalidyCFD, Wind and Energy, SLR Consulting, Tenancy 202 Submarine School, Sub Base Platypus, 120 High Street, North Sydney 2060, AUSTRALIAWaste facilities deal with dust, odours, and harmful gases. Designing an effective ventilation system for e-waste recycling facilities presents unique challenges due to the complexity of waste materials and potential emissions of hazardous air pollutants. This paper explores key considerations in designing an effective ventilation solution for e-waste facilities featured in an industrial showcase project in NSW, Australia. The facility comprises a Batch Rotary Pyrolysis (BRP) plant area to process waste electrical and electronic equipment, generating a flammable syngas during thermal treatment. Under abnormal conditions, this syngas may be released into the building, posing a fire hazard if ignited by unprotected electrical equipment near BRP machines or attached gas burners. To mitigate this risk, ventilation serves as the first line of defence against the accumulation of explosive gas concentrations, in alignment with AS1482-2013 standards. This study employs Computational Fluid Dynamics (CFD) analysis integrated with the site-specific wind rose to evaluate ventilation effectiveness, creating a detailed 3D model of the proposed facility, its surrounding structures, and natural ventilation components. A localised 10m-height reference wind rose was developed using The Air Pollution Model (TAPM) and CALMET diagnostic meteorological modelling software to provide accurate wind conditions for the project site. The CFD analysis delivers detailed insights, including airspeed distributions and predicted air exchange rates, highlighting hotspot areas with inadequate ventilation. Furthermore, the model facilitates comparative evaluations against regulatory standards by simulating concentrations of key gases (CO, SO₂, and NO₂) under abnormal gas leak conditions, ensuring that both safety and compliance are thoroughly upheld. The study offers comprehensive design input to refine natural ventilation systems, optimise opening sizes, and integrate mechanical ventilation where natural airflow is insufficient due to site orientation. This research demonstrates that an effective ventilation strategy for e-waste facilities can be developed when CFD modelling is incorporated early in the concept design stage. The proposed tool also has multiple downstream applications, including air quality and odour examination, thermal comfort assessment, fire risk evaluation, and smoke dispersion analysis.1032025103202512451258104https://wseas.com/journals/ead/2025/c125115-049(2025).pdf10.37394/232015.2025.21.104https://wseas.com/journals/ead/2025/c125115-049(2025).pdfNSW Government, NSW Government's Code of Practice: Managing the Work Environment and Facilities, 2019. Chartered Society of Physiotherapy Workplace, Health, Safety and Welfare Regulations, UK 1992. Health and Safety Executive, EH40/2005 Workplace exposure limits, ISBN 9780717667031, 2020. Australian Building Codes Board, The Australian National Construction Code, Part 3.8.5.3, Vol. 2, 2022. 10.15377/2409-9821.2020.07.2Al-Khalidy N, Better Natural Ventilation Design for Single Sided Apartments Utilising Computational Fluid Dynamic, International Journal of Architectural Engineering Technology, Vol. 7, 2020, pp. 13-22. Australian Standard, Electrical Equipment for Explosive Atmospheres Protection by Ventilation – Type of Protection V, AS 1482- 1985 (Reconfirmed 2013). 10.1109/mcsi.2016.018Al-Khalidy N, The Role of Computational Fluid Dynamics in Solving Wind Engineering Problems, IEEE Computer Society Conference - 3rd International Conf. on Mathematics and Computers in Sciences and Industry, Greece 2016. Nishioka T., Moteki M., Miyagi H., Tatumi T., Kadoya. Contamination Control by Unidirectional Flow Ventilation in a Refuse Disposal Facility, Air Infiltration and Ventilation Centre, [Online]. https://www.aivc.org/sites/default/files/airbase _12115.pdf (Accessed Date: September 17, 2024). Heiselberg P., Svidt K., Kragh H., Application of CFD in Investigation of Ventilation Strategies for Waste Incineration. Proceedings of the 5th International Symposium on Ventilation for Contaminant Control, Ottawa, Canada, September 14–17, 1997, pp. 155–163. 10.1111/j.1600-0668.2011.00723.xLi Y., Nielsen P.V. CFD and Ventilation Research. Indoor Air, 21(6), 2011, pp. 442– 453. 10.1007/978-981-16-7653-6_5Heng-Jin Tham, Mohd Suffian, and Chi-Ming Chu, CFD Assessment of Natural Ventilation Designs for Composting Systems, In Waste Management, Processing and Valorisation, Edited by A. Yaser, H. Tajarudin, and A. Embrandiri, Springer, 2022. DOI: 10.1007/978-981-16-7653-6_5. 10.1007/s10098-014-0816-6Egedy, A., Fogarasi, S., Varga, T. et al., CFD models in the development of electrical waste recycling technologies, Clean Technologies and Environmental Policy, Vol. 16, 2014, pp. 1255–1263. https://doi.org/10.1007/s10098- 014-0816-6. 10.2166/wst.2021.019Patziger, M., Improving Wastewater Treatment Plant Performance by Applying CFD Models for Design and Operation: Selected Case Studies, Water Science and Technology, Vol. 84, No. 2, 2021, pp. 323– 332. 10.1039/d0re00102cHafeez, S., Aristodemou, E., Manos, G., AlSalem, S. M., and Constantinou, A. Computational Fluid Dynamics (CFD) and Reaction Modelling Study of Bio-oil Catalytic Hydrodeoxygenation in Microreactors, Reaction Chemistry & Engineering, Vol. 5, 2020, pp. 1083–1092. 10.1016/j.proenv.2015.07.030Hartulistiyoso, E., Sigiro, F., and Yulianto, M., Temperature distribution of the plastics pyrolysis process to produce fuel at 450°C, Procedia Environmental Sciences, Vol. 28, 2015, pp. 234–241. 10.1039/d2ra01407fLuis Alberto De la Flor-Barriga and Ursula Fabiola Rodríguez-Zúñiga, Numerical analysis on a Catalytic Pyrolysis Reactor Design for Plastic Waste Upcycling using CFD Modelling, RSC Advances, Vol. 12, 2022, pp. 12436–12445. doi: 10.1039/D2RA01407F. 10.1080/14733315.2017.1299516Zhang, J., Johnson, W., and Plikas, T., Application of Computational Fluid Dynamics for Solving Ventilation Problems in Metallurgical Industrial Processes, International Journal of Ventilation, Vol. 16, No. 3, 2017, pp. 200–212. https://doi.org/10.1080/14733315.2017.12995 16. Heiselberg, P. K., Svidt, K., and Kragh, H., Application of CFD Investigation of Ventilation Strategies for Improvement of Working Environment in a Waste Incineration Plant, Ventilation '97: Global Development in Industrial Ventilation, Proceedings of the 5th International Symposium on Ventilation for Contaminant Control, Ottawa, Canada, Sept., 1997, PP.14–17. ANSYS, Ansys Fluent Theory Manual, USA 2024. 10.1016/0045-7930(94)00032-tShih, T. et al., "A New Eddy-Viscosity Model for High Reynolds Number Turbulent Flows: Model Development and Validation," Computers & Fluids, vol. 24, no. 3, 1995, pp. 227–238. ASHRAE, ANSI/ASHRAE Standard 55-2017: Thermal environmental conditions for human occupancy. American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2017. Safe Work Australia, Workplace exposure standards for airborne contaminants. Safe Work Australia, 2019, [Online]. https://www.safeworkaustralia.gov.au/ (Accessed Date: September 17, 2024).