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For that study an aircraft cabin with realistic pollution sources was built inside a climate chamber to determine the extent to which passengers’ perception of cabin air quality is affected by air temperature. The temperature inside the cabin was set at

This paper, after a general presentation of what indoor air quality is, discusses the development of new methods for the improvements of IAQ in maintaining or decreasing ventilation and energy use.

This paper investigates the effectiveness of a Purging System in a high-rise office building in Singapore with the aim of improving indoor air quality. The study initially adopts a continuous monitoring concept to investigate the impact of a daily purging operation on pollutant concentration levels at the low, middle and high floors of the office building. Pollutants investigated include formaldehyde, carbon dioxide, carbon monoxide and total volatile organic compounds (TVOC).

It is very important to estimate the stack pressure difference across exterior walls for understanding the energy impacts of infiltration and ventilation in high-rise buildings, because stack pressure is likely to significantly affect energy load and is sustained over a long period. This paper presents a simple prediction strategy for estimating the pressure distribution in high-rise residential buildings, using key parameters that affect the magnitude and distribution of stack pressure.

This paper presents simulation results of the performance of ventilation systems with self-regulating inlets in different types of typical Flemish dwellings. Normal free air inlet vents have one major disadvantage: the complete dependence on the variable outside weather conditions (wind and temperature). The use of selfregulating inlets should minimize this impact, optimize the indoor comfort (no draught) and reduce the waste of energy by ventilation.

This study considers the link between tertiary buildings design and equipments known as natural and hybrid ventilation or cooling. It focuses on the case of cross ventilated buildings and the envelope choices able to ensure comfort along with energy savings. This link is studied by simulating with TRNSYS various cross ventilation systems: by night, day or both. These are applied to typical situations as individual office, open-plan office, or meeting rooms. Studied rooms are chosen south oriented and subjected to medium internal gains.

As a result of the EPB directive, the Flemish government has established a new regulation due as from January 1ste, 2006. This regulation also imposes the presence of minimal ventilation equipment in new buildings. Various Belgian as well as international investigations report a lack of quality of installed ventilation systems, in individual dwellings as well as in utility buildings. Possible problems range from missing inlets, leaking air ducts to inadequate flow rates and acoustical complaints.

A hybrid ventilation system controlled by a pressure difference sensor was installed on a detached test house. Performance of this ventilation system was evaluated through the field measurement taken into account the different conditions of the air supply and the exhaust systems. The results of the measurement revealed that the exhaust airflow rate was relatively stable while the indoor-outdoor temperature difference varied and the wind velocity changed. The exhaust airflow rate met the target airflow rate of 64% during the whole measuring period.

The impact of the urban environment on natural and hybrid ventilation was investigated through experimental and computational procedures in the framework of RESHYVENT European Project. An experimental campaign was organized in two urban street canyons in Athens, during summer 2002, consisting of field and indoor experiments. The experiments aimed at the investigation of the impact of the various urban features on the efficiency of different ventilation systems.

Cross ventilation is one of the most important techniques for achieving energy conservation and for maintaining a comfortable indoor environment in summer. But it is difficult to evaluate the effect of cross ventilation quantitatively and to design based on a quantitative evaluation, because the indoor environment is uneven and changes with the outside conditions under cross ventilation. The full-scale model experiment has been done under cross ventilation, and the properties of airflow in and around the full-scale model have been examined.