This paper describes an investigation of the indoor environment in Dutch daycare centers. Air temperature and CO2 levels measurements were made during summer and winter in 14 centers.. Results and recommendations are presented.
For that study, indoor air pollutants including CO2, CO, MP10, PM2.5 and volatile compounds were measured in four hot spring hotels, (the results are presented.
The investigation and analysis of indoor environment condition of high and middle grade office building is presented in this paper, along with the results
1 group of 25 persons performed simulated office work for 2 hours in poor environmental conditions with overhead fluorescent lighting, traffic noise, hot temperature, supply air polluted, almost no daylight, and open office noise.The cost to improve each condition was estimated and expressed as a percentage of the total sumA second group experienced all the different conditions and selected the improvements they preferred, up to 50%-budget.Another group was exposed to 100 %-budget conditions. Results and conclusions are presented.
The authors have reviewed the literature on the effects of indoor environment on health and performance. And with the existing data have developed some initial models. They show the various relationships between :- ventilation rate and short term sick leave, - ventilation rate and work performance, - perceived air quality and performance, - temperature and performance- temperature and sick building syndrome symptomsand also between SBS-symptoms and work performance.
Associations between NO2 exposure and various respiratory conditions and symptoms have already been reported. The objective of that study was to characterize indoor air quality in Boston public housing apartments, many of which were homes of asthmatic children, in that aim the distribution of AER (air exchange rates) was examined and compared to those specified by ASHRAE in their new residential standard. Multivariate models were used to examine the relationship between AERs and indoor NO2 levels.
In practice, the commonly used Dutch design criterion for long-term thermal comfort in buildings-the weighted temperature exceeding hours method--often leads to confusion.The criterion is hard to understand for non-experts, and many doubt the validity of the present criterion : how sure are we that meeting the requirements really means that future occupants will be comfortable?
This paper summarises the adaptive approach to thermal comfort and analyses the data collected inSCATs surveys of thermal comfort throughout Europe. These results are used to suggest acceptable bands of temperature in heated or cooled and in free-running buildings. The results suggest that comfort temperatures in real buildings cannot be accurately predicted because of multiple differences between individuals, buildings and cultures in different countries.
This paper deals with the velocity of the airflow around human body from the outlet of the desktop personal air-conditioning. That device can provide more high quality air for occupant than other personal air-conditioning system, though the air velocity is always high. CFD simulations aiming at reducing the draft have been made.
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