A general multi-chamber model is presented and explored from the viewpoint of air quality studies. The model involves the following key concepts: purging flow rate and age distribution of both air and contaminants. From the physical and mathematical properties of the model, are deduced estimates of themagnitude of, and the relations between, the key concepts. The practical use of the model is illustrated.
Simulation methods and test results are presented here to confirm projections of actual total suspended particulate (TSP) concentration levels for representative office buildings, with particular emphasis on the 0.3 to 5 micron particulate si
Presents the underlying theoretical basis for measuring air flows in complex, multi-cellular buildings and by reviewing the existing experimental procedures which enables the carrying out of these measurements. Shows that inter-cell air flows can be determined only by generating N sets of tracer gas conservation equations, where N is the number of cells. Describes 3 systems being designed to carry out multi-cell ventilation measurements< 1. "grab sampling"< 2. multiple tracer measurements< 3. measuring averaged air change rates over long periods.
Presents a survey of tracer gas techniques for measuring air infiltration and includes a theoretical derivation of the equations, a description of each method, and a short description of the experimental procedure. Derives a qualitative error analysis which concentrates on mixing problems and uses it to compare the strengths and weaknesses of each method.< Derives the theory of multi-chamber infiltration measurements in situations involving many interconnected spaces (network type models).
Estimates of air infiltration in houses based on tracer gas measurements have usually assumed house is a single perfect mixing chamber with incoming air instantaneously and uniformly diffused to all parts of the interior. Points out that in reality some parts of the house - basement or rooms with doors closed - exchange air only very slowly with other parts so that actual mixing is far from instantaneous. Presents theory and mathematics necessary to apply tracer gas method to buildings of many chambers.
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