Paper 6: Volume 5 No.2 Sept 2006 Edition
Experimental
Evaluation of Airflow in a
Low-Energy
Building
J.
F. Karlsson
Division of
Energy System, Department of
Mechanical Engineering,
Linköping University
,
Sweden
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Abstract
This paper reports on
tracer gas measurements of the ventilation flow within a low-energy
building. Constant-concentration, decay and homogenous tracer gas emission
methods were used. Low-energy buildings are airtight constructions;
effective ventilation is thus very essential for the indoor climate. The
results of this study show an airflow rate between 0.42 and 0.68 air
exchanges per hour (ac/h), which should be compared to the minimum
requirements in Sweden of 0.5 ac/h. It was found that the airflow changes
with time and that the local mean age of air was different on different
floors of the building and, to some extent, different at different
heights.
Key words: ventilation,
low-energy building, tracer gas, constant concentration, decay, homogenous
concentration emission, dwellings.
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