Abstract
Thermal comfort is a feeling of well-being in an indoor environment. It is a guarantee of a good development of people in a building. For more than three months, many complaints were recorded in the West region of Cameroon and particularly in the city of Bandjoun. Indeed, people complain of high temperatures during sleep (between 10p.m and 4 a.m). These temperature increases led to a situation of indoor thermal discomfort in residential buildings in sleeping environments. This paper investigates numerically the three-dimensional indoor thermal comfort for sleeping environments in residential buildings constructed with local materials (concrete blocks and compressed earth bricks) in the city of Bandjoun. The novelty of the present work resides first in the computation of the direction of the incident solar radiation over the simulation time from longitude, latitude, time zone, time of the year, and time of the day. Secondly, it takes into account the various materials used for the roof (aluminum), ceiling (Bubinga wood), walls (concrete blocks/compressed earth bricks), window (glass), door (Bubinga wood) and its handle (aluminum). Finally, the solar and ambient wavelength dependence of emissivity model is used to account for differing emissivities in different wavelength bands. The multidimensional calculations were performed using Comsol Multiphysics 5.6. In addition, a questionnaire was developed to obtain the perception of residents. The numerical results obtained were in good agreement with the overall perception of residents because it was observed average increases of temperatures of 0.38 °C (between 24.57 °C and 24.95 °C) and 0.53 °C (between 24.77 °C and 25.3 °C) between 10p.m and 4 a.m respectively for buildings made with compressed earth bricks material and concrete blocks material.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call