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Abstract
It is imperative a model be developed that can assess the difference between the amount of CO2, generated within the human body and the amount of CO2 that is ejected by the body as a function of indoor air parameters. This model would allow the assessment of the amount of the CO2 which is not ejected by the body through exhalation and which have to be neutralized and ejected by the body through other mechanisms or have to be accumulated in the body depots. Currently, there is no experimental data that allows for predicting the amount of CO2, ejected through the blood gas exchange in the lungs as a function of CO2 concentration in the inhaled air. Our study, conducted within the AIRMEN project, aims to research the phenomenology of the human body as a physiological source of the deterioration of both the indoor environment and conditions of comfort and in particular on the indoor air quality. It is based on an experimental investigation of the external result from the human body metabolism and gas exchange in the lungs. The results of this study make it possible to logically define the limits of the permissible CO2 concentration in the indoor air for the different air quality categories indoors.
Highlights
The primary purpose of planning, designing and constructing residential buildings is to provide the occupants with a healthy and comfortable environment under various weather conditions
The occupants of non-industrial indoor environments perform multiple types of activities, and their physical activity level varies in vast intervals: from sleep through different types of light work up to intensive physical exercise
It is imperative a model to be developed which can assess the difference between the amount of CO2 generated within the body and the amount of CO2 that is ejected by the body as a function of the indoor air parameters
Summary
The primary purpose of planning, designing and constructing residential buildings is to provide the occupants with a healthy and comfortable environment under various weather conditions. The occupants of non-industrial indoor environments perform multiple types of activities, and their physical activity level varies in vast intervals: from sleep (in the residential buildings, hotels, hospitals) through different types of light work (in the residential buildings, schools, administrative buildings) up to intensive physical exercise (fitness centres, sport halls). For their activities, people need energy, which is generated within their bodies mainly by metabolism – Figure 1. As a result of the metabolism, people generate byproducts, a considerable amount of which is ejected by exhalation to the environment as a mixture of gases, mainly CO2 and water vapor
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