LoginA multiple tracer gas method for following air movement in buildings has been developed and demonstrated at the Polytechnic of Central London. This paper describes the method and shows how it is being used to investigate: 1.
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The tracer technique can be used in ventilation and contaminant spreading investigations. We have chosen sulphur hexafluoride. We have constructed aspecific instrumentation to perform indoor tests.
Effectiveness of ventilation as a major means of controlling indoor air quality was evaluated by correlating concentrations of gaseous (CO and CO2) and particulate (total) pollutants with two ventilation parameters.
The relationship between the observed concentration of air pollutants at points within a building and the characteristics of the ventilation system is examined, and a basic set of analytical expressions showing these relationships is presented.
This paper gives a presentation of the current research being carried out at NSIB with the aim of exploring the effectiveness of ventilation systems in controlling contaminant levels.
In order to reconsider the ventilation requirment in office environment and air environmental indices to determine it, field measurements were carried out.
This paper presents a numerical study of instationary three-dimensional flows.
The computer-aided ventilation system design requires the programming of a large number of empirical tables and observations on the use of mathematical expressions which describe numerous ventilation parameters.
The advancement of tracing techniques enabled the problems associated with local and general ventilation in industrial premises to be tackled with accuracy.
Ventilation by displacement is described in terms of ventilation efficiency and quantified by means of a two-zone flow and diffusion model.
Too high a concentration of certain gases (e.g. water vapour, carbon dioxide, tobacco smoke, alcohol, etc.) in public buildings can damage the health. Even low concentrations can cause discomfort and make the room air seem unpleasant.
The Sick Building Syndrome (SBS-syndrome) as defined by a WHO working group is discussed, and the existence of a sub syndrome is postulated, based on observations reported in the literature.
Air qulaity measurements along with airflow rate measurements of air conditioning system were conducted in an office building occupied by workers with clerical activities.
Laboratories with chemical fume hoods can have HVAC systems designed for variable air volume (VAV) for the optimum in safety and cost savings. Various VAV designs are discussed with their associated advantages and disadvantages.
Describes an investigation to show that the hourly, daily and monthly energy needs of simple buildings can be estimated using only limited available weather data for the location.
Reports a one-day seminar addressing 'The character and control of indoor air pollution', involving experts from both the public and private sector. Summarises the problems, the pollutants involved and some possible solutions.
Notes reasons for reducing dust concentrations in rooms - allergic reaction to pollens and mould spores, etc., plus the fact that viruses and bacteria and some substances causing smells are often attached to dust particles.
Notes increasing complaints in Germany with the use of air conditioning and mechanical ventilation systems, despite them creating an indoor climate meeting the stipulations of German standard DIN 1946.
This paper describes part of a research programme on energy consumption in the Polish building sector.
This note arises from work to identify the effectiveness and cost of remedial treatments for condensation and mould problems in housing.