An experimental study was conducted in Thailand to determine the thermal performance of twin glazed windows with dynamic insulation. The effects of blinds situated either between or outside the glazing were analysed. With an external blind, the heat transfer coefficient was 1.25 W/m2 deg C with natural convection and 0.6 W/m2 deg C for a flow of 20 m3/h (glass area 2.16 m2). The solar flux transmitted was evaluated analytically and experimentally depending on the blind's position. An economic study was performed on a six-storey air-conditioned building in Thailand.
A sample of 232 people were questioned during the winter about their bedroom window opening behaviour. They were also invited to cite the ill effects from which they might suffer if their bedroom window were closed all night. The great majority were found to adapt their window opening to the weather. Thereasons for it appear to be related to beliefs regarding ventilation and health.
Provides information for builders, architects and skilled owner-builders in the USA on the basics of using air-to-air heat exchangers in residential settings, including: 1) how heat exchangers work, 2) why and when they are appropriate, 3) how to choose an adequate ventilation rate and a machine that fits the purpose, 4) how to install, control and maintain the machine, 5) assessing the state-of-the-art in this technology and 6) information on suppliers, ventilation standards and further information sources.
A cross sectional survey investigating building sickness was carried out in two buildings with similar populations of office workers but differing ventilation systems, one being fully air conditioned with humidification and the other naturally ventilated.
The purpose of this investigation was to determine the amount of carbon monoxide that may be expected to be produced during normal cooking. The experiment measured carbon monoxide levels, using multiple burners with and without cooking vessels, and the rate of dissipation of the accumulated gasunder various conditions of ventilation.
Incidence of building occupant health and comfort complaints (tight building syndrome) have been linked to energy efficient, mechanically environmentally controlled sealed building technology and systems now characteristic to most office, commercial and publica buildings.
Pollutants in a substantial number of buildings have now been investigated by public and private agencies. The archive of data on indoor pollutant levels observed in office buildings under conditions of normal operation and occupancy are reviewed using a computer based Building Performance Database. Representative values of 153 pollutants as well as detailed frequency distributions of commonly measured pollutants and of temperature and humidity are presented.
This is a review paper addressing the current state-of-the-art. Concerns that motivate studies of the indoor environment are reviewed in the introduction. The source and typical diurnal variations of the concentration of several air contaminants are discussed in the section on characterization. A dynamic model is described in the section on indoor air quality modelling. Indoor air pollution control techniques are addressed in the last section.
A design is proposed to improve the performance of wind towers (or Baud-Geers) for natural ventilation and passive cooling. Under similar climatological and design conditions, the new design is capable of delivering air to the building at higher flow rates. It can also cool the air evaporatively to lower temperatures. Higher airflow rates and the evaporative cooling capability of the new Baud-Geer design can be fully utilized at night in summer to cool the building mass to lower temperatures. Momentum, mass and energy analyses are carried out for the proposed design.
Includes papers on pitched roofs, flat roofs, wall construction, window and door joints, and weathertightness and water penetration of buildings. The focus is mainly on water penetration but air infiltration and ventilation are also discussed.
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