AIVC - Air Infiltration and Ventilation Centre

Search form


You are here

Home  |  tracer gas techniques

Measurement of infiltration rates from daily cycle of ambient CO2

João Dias Carrilho, Mário Mateus, Stuart Batterman, Manuel Gameiro da Silva, 2014
tracer gas techniques | air infiltration | Atmospheric CO2 | Discrete Fourier transform
Bibliographic info: 35th AIVC Conference " Ventilation and airtightness in transforming the building stock to high performance", Poznań, Poland, 24-25 September 2014
Languages: English

We propose a new approach for measuring air infiltration rates in buildings. The method belongs to the class of tracer gas techniques but, unlike conventional CO2 based methods that assume the outdoor ambient CO2 concentration is constant, the proposed method recognizes that photosynthesis and respiration cycle of plants and processes associated with fuel combustion produce daily, quasi-periodic, variations in the ambient CO2 concentrations. These daily variations, which are within the detection range of existing monitoring equipment, are utilized for estimating ventilation rates without the need of a source of CO2 in the building. The new method has the advantages that no tracer gas injection is needed, and time resolved results are easily obtained.

(Login or register to download)

Related publications

The book of proceedings from the 18th AIVC Conference "Ventilation and Cooling", Athens
The book of proceedings from the 17th AIVC Conference "Optimum Ventilation and Air Flow
The book of proceedings from the 16th AIVC Conference "Implementing the results of vent