Study of Dioxide Carbon Concentration and Indoor Air Quality in Some Buildings in the Equatorial Region of Cameroon (Yaounde)

Background and purpose: Elevated CO۲ rate in a building affect the health of occupant. This document presents results of an experimental analysis conducted in ۵۰ offices located in ۱۲ buildings with different layer in Cameroon (Yaounde). This study took place in ۲۰۱۲, during the dry and the rainy seasons. The main goal is to show the influence of the building structure, the ventilation and the number of occupants on the CO۲ concentration in buildings. The areas chosen were ventilated at ۶۰%. Materials and Methods: A questionnaire was distributed to occupants. The different values in terms of temperature, air speed, humidity, CO۲ concentration and luminosity rate were measured simultaneously during working hours and without the occupants. The measurement took place while offices were naturally ventilated. Values obtained were analyzed and integrated. Results: Painted buildings with glasses were more pollutant than those made with soil and wood. A mechanically controlled area was more comfortable but more pollutant than a naturally ventilated area. Conclusion: The CO۲ concentration changes exponentially when the number of people in a hall increased especially when there are smokers. For temperature ranged from ۲۰.۵°C to ۲۸.۸°C and the CO۲ from ۳۵۰ppm to ۱۴۵۰ppm, the average consumption of O۲ by person varied between ۰.۰۰۹۷cfm and ۰.۰۱۶۲ cfm.

کلیدواژه ها:

CO۲ Concentration ، Indoor Air ، Buildings ، Equatorial Climate ، Health