The objective of that experimental field study was to investigate if a better indoor air quality in classrooms improves the performance of schoolwork for children. The results demonstrate that thanks to an increase of the outdoor air supply rate, or a moderate reduction of elevated classroom temperatures, the performance of a wide range of schooltasks are improved.
HVAC engineers have to incorporate the calculations and directives of the Ashrae standard 62.1-2004 into the normal design process to improve ventilation air delivery. Calculation of the ventilation rate procedure are difficult but several tools exist to make it easier.
This paper focuses on the possible association between classroom ventilation rates and the students' academic performance. A pilot study was conducted. The total number of observations with complete data included fifth grade classrooms in 54 elementary schools. The results of this preliminary study are presented.
That study demonstrated that factors in school environment such as high temperature, low air exchange rate and ambient air pollution from traffic exhausts are responsible for respiratory symptoms among pupils. Some solutions are suggested to improve that situation.
In this paper, the authors have investigated the determinants of IAP in Bangladesh, using monitoring data from 236 households in the region of Dhaka. Their results show that fuel choice affects indoor pollution levels significantly. A national "clean household" promotion program combined with an effective public education on the associated health benefits would reduce IAP exposure to safer levels for the very poor families.
The aim of that study was to compare self reported asthma, asthmatic symptoms and pollen or pet allergies among pupils in the Chinese and Swedish schools with similar data . The allergens levels in settled and airborne dust were compared too, with very different ventilation and heating systems, different outdoor air pollution and different pet keeping. The results presented demonstrate large differences between respiratory symptoms and reports on asthma.
For that study, the dispersion of airborne contaminants in a work environment has been tested with physical measurements, and the data collected has been compared to CFD simulations coupled with mathematical evaporation models. The results are presented.
Numerical simulations were executed to estimate air movement in a typical room.The analytical estimation of minimum value of inlet air velocity from UFAD system has been confirmed by those simulation results of temperature and velocity distributions..
For that study, the software package TRNSYS (transient systems simulation program) has been applied to estimate the energy consumption of a typical operating theatre in a tropical climate (Malaysia). For the simulation, typical meteorological year (TMY) data for the Kuala Lumpur area (Malaysia), and an operating theatre located in the University of Malaya Medical Centre (UMMC)(Kuala Lumpur), are used. Simulations and results are presented.The current HVAC system could be improved with heat pipe heat exchangers (HPHXs).
A review of previous studies and reports on laboratory and field studies developed in the aim of assessing the performance of ventilation systems in spaces where smoking is allowed, is presented in this paper.The problems associated with those studies conducted in that type of buildings are discussed. The effectiveness of the ventilation systems is nevertherless clearly demonstrated.
Login