Indoor Environmental Quality in a Classroom: Faculty of Architecture, Chiang Mai University
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Abstract
This study investigates indoor environmental quality of a 100-seat classroom at the faculty of Architecture, Chiang Mai University. The physical environment real-time data recorded online every 10 minutes for a year are carbon dioxide (CO2) level, indoor temperature, and relative humidity. The environmental data then are analyzed with the ASHRAE 62.1 standard and the Engineering Institute of Thailand standard for classroom ventilation. The results show that there is no installation of any fresh air intake system, no mechanical fans and no exhausting system from the air-conditioner. Consequently, air change rate of a measured classroom inadequate and the CO2 cumulative level has become risky to health. The peak CO2 level is almost 5,000 ppm at 4.30 pm in the 4-class-continuous day, meaning totally cumulative for more than seven hours. In the worst case, this condition could possibly result in unconsciousness. Although the occupants have responded less severe than in theory, their feedback conforms dizziness, fatigue, and sleepiness after the 2nd class. Thermal comfort status in the classroom was ‘warm’ and ‘slightly warm’, while the air-conditioners were turned on during the classes. The recommendation for IEQ improvement is to re-install the standardised air-conditioning system or to increase ventilation rate by installing at least 12 fans with 300 m/s velocity performance.
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References
American Society of Heating, Refrigerating and Air-Conditioning Engineers [ASHRAE]. (1999). ASHRAE 62- Ventilation for acceptable indoor air quality. Atlanta: Author.
American Society of Heating, Refrigerating and Air-Conditioning Engineers [ASHRAE]. (2010). ASHRAE 62.1 standard thermal environmental conditions for human occupancy. Atlanta: Author.
Auliciems, A., & Szokolay, S. V. (2007). Thermal comfort. PLEA Notes: Passive and low energy architecture international, design tools and techniques (2nd revision ed.). In association with Department of Architecture,The University of Queensland, Brisbane.
Bureau of Environmental Health (2018). WHO guidelines for indoor air quality for official staffs, Department of Health, Ministry of Public Health: Bangkok, p. ค-3.
de Dear, R. J., Brager, G., & Cooper, D. (1997). Developing an adaptive model of thermal comfort and preference (Final report ASHRAE RP- 884). Australia: Macquarie Research.
Deutsches Institut für Normung [DIN]. (1994). DIN 1946 – Part 2, Heating, ventilation and air conditioning – Requirements relating to health (VDI code of practice). Berlin: Author.
Fanger, P. O. (1970). Thermal comfort. Copenhagen: Danish Technical Press.
Godish, T. (2001). Indoor environmental quality. Boca Raton, Florida: CRC Press LLC, Lewis Publishers.
Griffiths, M., & Eftekhari, M. (2008). Control of CO2 in a naturally ventilated classroom. Energy and Buildings, 40(4), 556-560.
Hoyt, T., Schiavon, S., Piccioli, A., Cheung, T., Moon, D., & Steinfeld, K. (2017). CBE Thermal comfort tool. Center for the Built Environment, University of California Berkeley. Retrieved from http://comfort.cbe.berkeley.edu/.
Inkarojrit, V., Sirirachata, V., Sinjermsiri, C., & Sinanant, K. (2008). Exploring the variation of the desired thermal sensation in tropical climate: A pilot study. Dublin, Ireland: University of Westminster.
Kanjanakrajang, A., & Chuaybamroong, P. (2017). Measurements of Carbon Dioxide to Determine the Ventilation Effectiveness in the Classroom. Thai Science and Technology Journal, 25(6), 960-974.
Khamta, J. (2015). A Study of the relation between teaching behaviors of teacher and learning behavior of students Faculty of Business Administration at Thai-Nichi Institute of Technology. Veridian E-Journal, Silpakorn University, 8(2), 1528-1542.
Khedari, J., Yamtraipat, N., Pratintong, N. & Hirunlabh, J. (2000). Thailand ventilation comfort chart. Energy and Buildings, 32(3), 245-249.
Kim, J., & de Dear, R. (2012). Nonlinear relationships between individual IEQ factors and overall workspace satisfaction. Building and Environment, 49, 33-40.
Meteorological Informative Center (2010). Climitological data for period 1981-2010, Northern Meteorological Center, Chiang Mai, Thai Meteorological Department.
Ministry of the Environment (2012). The National Building Code of Finland, D2: Indoor climate and ventilation of buildings. Adopted in Helsinki on March 30th 2011. Retrieved March, 2018 from http://www.finlex.fi/data/normit/37187-D2-2012Suomi.pdf.
Muangkeaw, K. (2018). Indoor Air Quality in Office Buildings. Journal of Department of Science Service, Ministry of Science and Technology, 1-14.
Myhrvold, A. N., Olsen, E., & Lauridsen, Ø. (1996). Indoor environment in schools – Pupils health and performance in regard to CO2 concentrations. Proceedings of Indoor Air’ 96: the 7th International Conference on Indoor Air Quality and Climate, (pp. 369 - 374,). Nagoya, Japan.
Muangkaew, K. (2016). Indoor air quality in office buildings. Journal of Department of Science Service Ministry of Science and Technology, 1-14.
Northern Meteorological Center. (2010). Climitological data for period 1981-2010 (Report). Chiang Mai, Thailand: Metrorological Department.
Olgyay, V. (1963). Design with climate: Bioclimatic approach to architectural regionalism (4th ed.). New Jersey: Princeton University Press.
Santamouris, M., Synnefa, A., Asssimakopoulos, M., Livada, I., Pavlou, K., Papaglastra, M., Gaitani, N., Koloskotsa, D., & Assimakopoulos, V. (2008). Experimental investigation of the air flow and indoor carbon dioxide concentration in classrooms with intermittent natural ventilation. Energy and Buildings, 40, 1833-1843.
Sawatmongkhonkul, N., & Moorapun, C. (2015). Perception of interior air quality in public buildings. Veridian E-Journal, Slipakorn University, 8(2), 1583-1594.
Schibuola, L., Scarpa, M., & Tambani, C. (2016). Natural ventilation level assessment in a school building by CO2 concentration measures. Energy Procedia 101, 71stConference of the Italian Thermal Machaines Engineering Association, ATI2016, 14-16 September 2016, (pp. 257-264). Turin, Italy.
Swiss Standards [SIA]. (1992). SIA 328/1: Tecnical requirements for ventilation systems. Zurich: Schweizerische Normen Vereinigung.
The Engineering Institute of Thailand (2008). Building Audit Techniques for Safety, Engineering Institute of Thailand: Bangkok, pp. 142-14.
The Engineering Tool Box. (2016). Air change rates for typical rooms and buildings. Retrieved December 8, 2016 from http://www.engineeringtoolbox.com/air-change-rate-room-d_867.html.
Turunen, M., Toyinbo, O., Putus, T., Nevalainen, A., Shaughnessy, R., & Haverian-Shaughnessy, U. (2014). Indoor environmental quality in school buildings, and the health and wellbeing of students. International Journal of Hygiene and Environmental Health, 217, 733-739.
Waeochan, N. (2017). Interior Architectural Student’s Learning Behavior: Case Study of the KMITL’s Interior Architecture Curriculum. Journal of the Faculty of Architecture King Mongkut’s Institute of Technology Ladkrabang, 25(2), 107-123.