Abstract
: People are one of the sources for deterioration of the indoor air quality. They worsen indoor air quality by their presence (respiration, bio-effluents), activities and habits. Through respiration, people decrease the oxygen concentration in the air of the occupied space and increase carbon dioxide and water vapor concentration in the indoor air as well as its temperature. The goal of the AIRMEN project is to find out if the rate of consumption of oxygen and emission of carbon dioxide (and water vapor) by people depends on the indoor air temperature as well as carbon dioxide concentration in the inhaled air. In order to achieve this goal a small climate chamber must be designed and constructed which allows for controlling and measuring both inflow and exposure parameters as well as for measuring outflow parameters. The principal goal of this paper is to present some important details, obtained by CFD simulations, from the design process of the climate chamber which precondition the air distribution in the chamber and hence the exposure parameters.
Highlights
People are one of the strongest sources of pollution to indoor air
The continuous impact is due to their decisions about the building construction materials and elements, interior and furniture materials, heating and ventilation systems, etc
People significantly change the composition of the indoor air through respiration
Summary
People are one of the strongest sources of pollution to indoor air. They influence indoor air quality in two general ways: continuously and discontinuously. The discontinuous impact is due to their presence in a space They deteriorate the indoor air quality by their physiology (respiration, bio-effluents, desquamation, etc.), activities (cooking, cleaning, sport, etc.), and habits (hobbies, smoking, aromatizing, etc.). According to Despopolous & Silbernagl (2003), at rest, the body maintains a VE (expiratory volume) of about 8 L/min, with a corresponding oxygen consumption rate (VO2) of about 0.3 L/min and a CO2 elimination rate (VCO2) of about 0.25 L/min. Under these conditions, in one hour a person would change volume fractions of O2 and CO2 in a 25 m3 room without ventilation by 720 ppm and 600 ppm, respectively
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