Abstract
This paper presents a theoretical and an experimental study on the determination of thermal phase shift time and damping factors of building walls. The work consisted in evaluating the thermal comfort in a building. This study is a contribution to put in place a thermal regulation in Burkina Faso, a country with a dry tropical climate. This regulation will, in its application, reduce the energy consumption related to air conditioning in buildings. To do this, we theoretically determine the parameters influencing this comfort using the admittance method. This method makes it possible to analyze the thermal response of a building to a periodic energy demand. It is based on the modeling of the building component by the quadrupole method resulting from the writing of the thermal problem in the form of transfer matrix products. The principle is to link the flows and temperatures of both sides of a homogeneous wall through the equation of heat and the Fourier transform. The calculation method is validated by experimental results. For simple sheet walls based on their compositions, damping factors range from about 37.9% to 79.7% and thermal phase shift time from about 3.9 hours to 7.4 hours. However, the values of these parameters are better when the walls are double-sheeted, the maximum value of the damping factor is 11.5% and the minimum value of the thermal phase shift time is 9.7 h. The values of Mean Bias Difference (MBD) and Root Mean Square Difference (RMSD) show that the theoretical and experimental results are quite concordant. The admittance method can be used to evaluate the performance of building walls.
Highlights
Thermal comfort is an important parameter in habitats because of its impact on the quality of indoor environments, the health and productivity of the occupant
Alamin et al [6] have shown that the thermal comfort conditions of users in indoor environments have a direct effect on the productivity of these users
The study made by Coulibaly et al [7] on the optimization of the envelope of a bioclimatic building, highlights the effect of the thermal inertia of the different layers of materials of the double sheets of the walls on the energy consumption in air conditioning and comfort
Summary
Thermal comfort is an important parameter in habitats because of its impact on the quality of indoor environments, the health and productivity of the occupant. Enescu [2] reviewed the most used models and thermal comfort indicators with their variants The characteristics of these models and their use can Emmanuel Ouédraogo et al.: Determination of Parameters Influencing Thermal Comfort in a Building predict the indoor air temperature and the average vote prediction index for energy management. As the heat transmission in the building is through the envelope, it is necessary to determine the parameters of the walls influencing the thermal comfort These parameters are the thermal phase shift time and the damping factors. The study made by Coulibaly et al [7] on the optimization of the envelope of a bioclimatic building, highlights the effect of the thermal inertia of the different layers of materials of the double sheets of the walls on the energy consumption in air conditioning and comfort. The solutions in the first case have the simplest form and are the basis of the admittance method
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