It is shown that FBL controller works efficiently in bifurcation control and transforms the quasi-periodic limit cycles into the periodic ones (and consequently comfortable indoor conditions).
The results show that supply chilled water temperature and space cooling load have strong impacts respectively on the capacity of decentralized units and cooling panel, which consequently influence indoor air condition.
Although there is a growing interest in the subject, there is still a current lack of fundamental understanding of the complex flow regimes and external pollutant sources and the ways in which these interact with ventilation processes and consequently with indoor air quality.
Dampness problems may also indicate low ventilation rate and consequently increased levels of indoor pollutants from interior surfaces or human activities.
The rooms were unoccupied and free of indoor sources, and consequently reductions in particle concentration were due to deposition processes within the room alone.
On the other hand, permeable coverings can be considered as a passive control method of indoor conditions and, consequently, have implications in the perception of indoor air quality, local thermal comfort, and energy savings.
Furthermore, the dust mite and cat allergen concentrations vary greatly by indoor humidity and consequently by climate, season, building floor, ventilation rates, dampness, floor type, occupant density, and many other factors indirectly associated with humidity.
How to balance the contradiction between energy saving and improvement of indoor environmental quality which consequently affects human performance has always been a problem.
Since the urbanization rate in developing countries – like the case in Egypt – is rising rapidly, the pressure placed on energy resources to satisfy inhabitants' indoor comfort requirements is consequently increasing too.
The poorest tend to be more exposed to environmental hazards such as inadequate housing and proximity to polluting industries, resulting in higher levels of indoor and outdoor air pollutants and, consequently, respiratory disease.
