In this study, the indoor environmental quality (IEQ) in air conditioned residential buildings in a dry desert climate is examined from the perspective of occupants via two aspects: thermal comfort and indoor air quality. The study presents statistical data about the domestic-occupant thermal comfort sensations together with data describing the indoor air quality in Kuwaiti residential buildings. With respect to the latter, the overall IEQ acceptance using two measurements namely: physical measurements and subjective information collected via questionnaires, was used to evaluate 111 occupants living in twenty five air-conditioned residential buildings in the state of Kuwait. The operative temperature based on Actual Mean Vote (AMV) and Predicted Mean Vote (PMV) was identified using linear regression analysis of responses on the ASHRAE seven-point thermal sensation scale and was found to be 25.2°C and 23.3°C, respectively, in the summer season. Indoor air quality (IAQ) with respect to carbon dioxide concentration level was compared with the acceptable limits of international standards, i.e. ASHRAE Standard 62.1 [1]. The proposed overall IEQ acceptance findings in residential buildings show CO2 concentration level between 909 and 1250 ppm. However, this may be considered a higher level of CO2 concentration, which may require increasing ventilation rate through window operation or mechanical ventilation.
References
[1]
Al-Ajmi Farraj, F. and Loveday, D.L. (2010) Indoor Thermal Conditions and Thermal Comfort in Air-Conditioned Domestic Buildings in the Dry-Desert Climate of Kuwait. Building and Environment, 45, 704-710.
https://doi.org/10.1016/j.buildenv.2009.08.018
[2]
Kuwait International Airport. (2006) Meteorological Summaries Year 1962-2006, State of Kuwait: Meteorological Department Climatological Division.
[3]
ISO 7730. (2005) Moderate Thermal Environments. Determination of the PMV and PPD Indices and Specification of the Conditions for Thermal Comfort. 2nd Ed., International Organisation for Standardisation, Geneva.
[4]
ANSI/ASHRAE, Standard 55. (2004) Thermal Environmental Conditions for Human Occupancy. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, Georgia.
[5]
ANSI/ASHRAE Standard 62.1. (2007) Ventilation for Acceptable Indoor Air Quality. American Society of Heating. Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, Georgia.
[6]
Sekhar, C. and Ching, C.S. (2002) Indoor Air Quality and Thermal Comfort Studies of an Under-Floor Air-Conditioning System in the Tropics. Energy and Buildings, 34, 431-444. https://doi.org/10.1016/S0378-7788(01)00128-1
[7]
Mallick, F.H. (1996) Thermal Comfort and Building Design in the Tropical Climates. Energy and Buildings, 23, 161-167.
https://doi.org/10.1016/0378-7788(95)00940-X
[8]
Howell, W.C. and Kennedy, P.A. (1979) Field Validation of the Fanger Thermal Comfort Model. Human Factors, 21, 229-239.
https://doi.org/10.1177/001872087902100211
[9]
Busch, J.F. (1990) Thermal Responses to the THAI Office Environment. ASHRAE Transactions, 96, 859-872.
[10]
Cena, K. and de Dear, R.J. (2001) Thermal Comfort and Behavioural Strategies in Office Buildings Located in a Hot-Arid Climate. Journal of Thermal Biology, 26, 409-414. https://doi.org/10.1016/S0306-4565(01)00052-3
[11]
Al-Ajmi, F., Loveday, D.L., Bedwell, K.H. and Havenith, G. (2008) Thermal Insulation and Clothing Area Factors of Typical Arabian Gulf Clothing Ensembles for Males and Females: Measurements Using Thermal Manikins. Applied Ergonomics, 39, 407-414. https://doi.org/10.1016/j.apergo.2007.10.001
[12]
Al-Ajmi, F., Loveday, D.L. and Havenith, G. (2006) Thermal Insulation of Arabian Gulf Male Clothing: Measurements Using a Thermal Manikin. ASHRAE Transactions, 112, 240-246.
[13]
ISO 9920. (2006) Ergonomics of the Thermal Environment-Estimation of the Thermal Insulation and Evaporative Resistance of Clothing. International Standard Organization for Standardization (ISO).
