A transient pressurization method for measurements of airtightness
Artikel i vetenskaplig tidskrift, 2007

By measuring the pressure decline in a pressurized air volume from which air is leaking it is possible to determine the air leakage rate as a function of the pressure difference. The leakage rate is proportional to the time derivative of the pressure. The formula, which is quite simple, accounts for temperature change of the air and volume change of the chamber. The derivation of the equation relating air leakage to pressure drop is described. Initial tests of the method have been performed and the derived equation shows good agreement with air leakage rates obtained by theoretical as well as standard steady-state methods.

heated room surfaces

orifice flow

air leakage

airtightness

fan pressurization

convection

general gas law

air infiltration

transient pressurization measurements

Författare

Björn Mattsson

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Johan Claesson

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Journal of Building Physics

1744-2591 (ISSN)

Vol. 31 1 35-53

Ämneskategorier

Samhällsbyggnadsteknik

DOI

10.1177/1744259107079021

Mer information

Skapat

2017-10-07