This research examines the impact of cool roofs on thermal comfort and energy consumption in Conakry, Guinea, which has a hot and humid tropical climate. A dynamic simulation using the TRNSYS-CONTAM coupling was performed on a typical residential building. Results from the reference building showed high indoor temperatures, with a 57% discomfort rate in the living room zone. Applying a cool roof with an absorption coefficient of 0.3 reduced the roof surface temperature by 15?C. The living room operative temperature also decreased by 2.4?C, and the discomfort rate dropped to 33%. The study also compares annual cooling loads according to two different temperature setpoint ranges. The results show that using the fixed setpoint defined by the ISO-7730 standard leads to an increase of 38% in air conditioning load compared to the adaptive setpoint ISO-15251.
Iwaro, J. and Mwasha, A. (2010) A Review of Building Energy Regulation and Policy for Energy Conservation in Developing Countries. EnergyPolicy, 38, 7744-7755. https://doi.org/10.1016/j.enpol.2010.08.027
[3]
RGPH3 (2014) Les résultats préliminaires du 3e Recensement général de la population et de l’habitat (RGPH-3), effectué du 01 mars 2014 au 01 avril 2014.
[4]
Santamouris, M. (2021) Cool Roofs and Cool Materials for the Mitigation of Urban Heat Island. In: Brebbia, C.A., Ed., Urban Heat Island—Mitigation and Adaptation, WIT Press, 57-71.
[5]
Baniassadi, A., Sailor, D.J., Crank, P.J. and Ban-Weiss, G.A. (2018) Direct and Indirect Effects of High-Albedo Roofs on Energy Consumption and Thermal Comfort of Residential Buildings. Energy and Buildings, 178, 71-83. https://doi.org/10.1016/j.enbuild.2018.08.048
[6]
Scolaro, T.P., Ghisi, E. and Silva, C.M. (2024) Effectiveness of Cool and Green Roofs Inside and Outside Buildings in the Brazilian Context. Sustainability, 16, Article 8104. https://doi.org/10.3390/su16188104
[7]
Alchapar, N.L., Colli, M.F. and Correa, E.N. (2021) Cool Materials in Buildings. Roofs as a Measure for Urban Energy Rehabilitation. In: Urban Heat Stress and Mitigation Solutions, Routledge, 233-252. https://doi.org/10.1201/9781003045922-12-15
[8]
Diallo, M.A.I., Romani, Z., Mahdaoui, M., Bahraoui, F. and Ahachad, M. (2024) Numerical Simulation Integrating Passive Cooling Strategies for Building Thermal Comfort in Guinea’s Climates. Advances in Building Energy Research, 18, 82-103. https://doi.org/10.1080/17512549.2024.2321204
[9]
Rawat, M. and Singh, R.N. (2022) A Study on the Comparative Review of Cool Roof Thermal Performance in Various Regions. EnergyandBuiltEnvironment, 3, 327-347. https://doi.org/10.1016/j.enbenv.2021.03.001
[10]
jbc.cd (2016) Rapport National Habitat III. Guinée. https://share.google/CPbXbOtrLv72HOeN9
[11]
Yoo, J. and Rohli, R.V. (2016) Global Distribution of K？ppen-Geiger Climate Types during the Last Glacial Maximum, Mid-Holocene, and Present. Palaeogeography, Palaeoclimatology, Palaeoecology, 446, 326-337. https://doi.org/10.1016/j.palaeo.2015.12.010
Sa, K. (2018) TRNSYS 18: A Transient System Simulation Program. Solar Energy Laboratory, University of Wisconsin. http://www.trnsys.com/
[14]
Dols, W.S., Emmerich, S.J. and Polidoro, B.J. (2015) Using Coupled Energy, Airflow and Indoor Air Quality Software (TRNSYS/CONTAM) to Evaluate Building Ventilation Strategies. Building Services Engineering Research and Technology, 37, 165-173.
[15]
Swami, M.V. and Chandra, S. (1988) Correlations for Pressure Distribution on Buildings and Calculation of Natural-Ventilation Airflow. Ashrae Transactions, 94, 243-266.
[16]
Ministère de la Transition écologique (2021) Annexe 1—Méthode de calcul 3CL-DPE (Version 1.3). https://rt-re-batiment.developpement-durable.gouv.fr/IMG/pdf/annexe_methode_de_calcul_3cl-dpe_v1.3.pdf
