The ventilation of two newly built school buildings in Finland are compared in that study, one of the experimental building is equipped with fan assisted natural ventilation and the other one with mechanical supply and exhaust ventilation system with heat recovery. The results are presented.
The objective of that study is to analyze the influence of outdoor air and sypply air system on particle levels, along with the effect of indoor sources on them. Particle measurements were carried out in three different buildings : a school, an office, and a single-family house in Northern Finland.
For that study two different rectangular test chambers of different size(9.37 m3 and 0.14 m3) were realised, in order to analyze the behaviour of fine particles deposition in rooms and to show the influence of airflow velocity on it.. Several experimental measurement results are presented
This objective of that study is to clarify the numbers and species of bacteria and fungi present on the surfaces of air filters at various temperatures and relative humidity. The comparison of different types of adherent bacteria and fungi in the surface between enzyme and control filters is made too.
Field measurements have been carried in commercial kitchen to assess the performance of ventilated ceiling system, hanging the combination of ventilation rate and operating electrical appliances in order to find the best control method to realize energy consumption.
Typical modes of air distribution such as ceiling supply and under-floor supply systemshave been investigated by using a breathing thermal manikin in a field environmental chamber. The two systems are compared , conclusions and recommendations are presented.
The objective of this study is to evaluate the effectiveness of (UFAD) system in controlling thermal comfort and indoor air quality in office building. In that aim environmental parameters have been measured, concentrations levels of pollutants have been monitored, the air exchange rate and percentage of oudoor air have been studied, and the results compared with recommended standards.
The cooling effect of a Cool chair is examined in this paper with is its ability to affect the user's psychology thanks to its thermal adjustibility. The air is drawn into the seat and backrest and can be blown out through the armrests. The amount and the direction of the airflow can be easily adjusted. The experiment , data analysis and conclusions are presented.
Two experimental studies were carried out to examine the influence of indoor air carbon-dioxide pollutant concentration on human well-being and the intensity of mental work. Laboratory measurements of CO2 concentrations from 600 up to 5000 ppm were set .The results showed that CO2 concentration over 3000 ppm makes the well-being and the concentration of the subjects decline.
That study shows that positive application of the principal component approach to analyse the complex subjectives responses of subjects. This approach allows a detailed evaluation of effects of outdoor air supply rate on each subjective variables, but also the impact on different perceptual mechanisms.
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