Abstract
Air Handling Units in mechanical ventilation system possess a high degree of potential to circulate contaminants within occupied spaces of a building which often results in sick building syndrome (SBS), building related illness (BRI) and other indoor air quality (IAQ) related issues. This happens despite the expected role of ventilation systems to create a balance of thermal comfort and indoor air quality to the building occupants as well as the stored components. In the hot and humid climate mechanical ventilation systems play an important role of controlling the indoor hygrothermal conditions. Inadequate performance of the mechanical ventilation systems result in several issues ranging from human occupants discomfort, mechanical damages to archival materials and mould problem amongst others. This study presents the measurement and analysis of the mechanical ventilation systems’ performance and its effect on various indoor spaces in an academic building in Malaysia. Measurement of airflow, thermal and hygric conditions of the facility together with the aero-biological sampling were executed. The ventilation performance assessment revealed that the AHU fails in its cooling and dehumidification capacities as most of the occupied zones witnessed elevated humidity and low temperature and hence poor hygrothermal performance. On the other hand, results of bio-aerosol assessment indicates that the AHU performs well in its decontamination capacities by reducing the microbial level between the AHU and the occupied zones. The dominant species of mould in the assessed spaces are Penicillium sp., Yeast, Cladosporium sp., and Chaetomium sp. with 100 % occurrence in all the assessed space. On the other hand, Black Mold, Syntalidium sp., and zygomycetes are the least species in spaces with 25 % occurrence. The presence of black mould portends a great danger to the occupants’ health and therefore requires urgent attention.
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References
Dunham-Bush, in Modular Central Station Air-Handling Units: CS3 Series. Available http://www.dbamericas.com/pdf/installation_manuals/CS3.pdf
World Health Organization, WHO guidelines for indoor air quality: dampness and mould, WHO Regional Office for Europe, Copenhagen, Denmark 978 92 890 4168 3, (2009)
J. Hensen, R. Lamberts, Building performance simulation for design and operation. (Taylor & Francis, London, 2011)
S.C. Wilson, R.N. Palmatier, L.A. Andriychuk, J.M. Martin, C.A. Jumper, H.W. Holder et al., Mold contamination and air handling units. J. Occup. Environ. Hyg. 4, 483–491 (2007)
S. Borrego, I. Perdomo, Aerobiological investigations inside repositories of the National Archive of the Republic of Cuba. Aerobiologia 28, 303–316 (2011)
C.K. Tang, N. Chin, Building energy efficiency technical guideline for passive design (Building Sector Energy Efficiency Project (BSEEP), Malaysia, 2013)
J.A. Clarke, Energy Simulation in Building Design (Butterworth-Heinem, Oxford, 2001)
A.F. Cruez, Keeping a lid on superbugs, in New Straits Times (2013). Available http://blis2.bernama.com.ezproxy.psz.utm.my/getArticle.do?id=147876&tid=79&cid=3
A.F. Cruez, ‘Sick’ hospital ready to serve. New Straight Times (2013). Available http://blis2.bernama.com.ezproxy.psz.utm.my/getArticle.do?id=21492&tid=49&cid=3
H. Hens, IEA annex 14: condensation and energy. J. Build. Phys. 15, 261–273 (1992)
E. Di Giuseppe, in Nearly Zero Energy Buildings and Proliferation of Microorganisms: A Current Issue for Highly Insulated and Airtight Building Envelopes (2013). Available http://link.springer.com/book/10.1007/978-3-319-02356-4
P. Baggio, C. Bonacina, P. Romagnoni, A.G. Stevan, Microclimate analysis of the Scrovegni Chapel in Padua-Measurements and simulations. Stud. Conserv. 49, 161–176 (2004)
EVO, International performance measurement and verification protocol, in Energy Project Financing: Resources and Strategies for Success, ed. by EVO, vol. I (2009), p. 277
P. Horan, M.B. Luther, Using psychrometric chart in building measurements, in 44th Annual Conference of the Architectural Science Association, ANZAScA2010, Auckland, New Zealand, 2010, pp. 1–8
S.P. Corgnati, V. Fabi, M. Filippi, A methodology for microclimatic quality evaluation in museums: application to a temporary exhibit. Build. Environ. 44, 1253–1260 (2009)
M. Ali, M.O. Oladokun, S. Osman, An improved method to evaluate indoor microclimatic data: case study of a book archive in a hot and humid climate, in 13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014, Hong Kong, (2014)
British Standard Institution, BS ISO 16000-18:2011 Indoor air—Part 18: Detection and enumeration of moulds—Sampling by impaction, ed. by BSI (2011)
PBI International, in SAS Spec Book. Available www.massetrecovery.com/pictures12/sasmanual.pdf
British Standards Institution, BS ISO 16000-17:2008 Indoor air—Part 17: Detection and enumeration of moulds—Culture-based method, ed. by BSI (2008)
M. Steeman, M. De Paepe, A. Janssens, Impact of whole-building hygrothermal modelling on the assessment of indoor climate in a library building. Build. Environ. 45, 1641–1652 (2010)
MS 1525, Code of practice on energy efficiency and use of renewable energy for non-residential buildings, ed. by Putrajaya (Department of Standards Malaysia, Malaysia, 2007)
S. Borrego, P. Lavin, I. Perdomo, S. Gomez de Saravia, P. Guiamet, Determination of indoor air quality in archives and biodeterioration of the documentary heritage, ISRN Microbiol, vol. 2012, p. 680598 (2012)
R. Ogórek, A. Lejman, K. Matkowski, Influence of the external environment on airborne fungi isolated from a cave. Pol. J. Environ. Stud. 23, 435–440 (2014)
M. Ali, M.O. Oladokun, S. Osman, S. Niza, H. Hairul Aini, Influence of indoor microclimate distribution on mould infestation in a university library, in InCIEC 2014: International Civil Engineering and Infrastructure Engineering Conference, Kota Kinabalu, Sabah, Malaysia (in press)
Acknowledgments
The results presented in this study is part of a multidisciplinary research project (FRGS12-067-0126) engineered towards indoor mould growth prediction using thermal characteristics in the tropical climate buildings by the Ministry of Higher Education (MOHE) Malaysia. The financial supports is gratefully acknowledged.
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Ali, M., Oladokun, M., Osman, S.B., Samsuddin, N., Hamzah, H.A., Salleh, M.N. (2015). Ventilation Performance Assessment of an Educational Building in a Hot and Humid Climate. In: Hassan, R., Yusoff, M., Alisibramulisi, A., Mohd Amin, N., Ismail, Z. (eds) InCIEC 2014. Springer, Singapore. https://doi.org/10.1007/978-981-287-290-6_29
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DOI: https://doi.org/10.1007/978-981-287-290-6_29
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