ESTIMATION OF AIR INFILTRATION OF BUILDINGS BASED ON THE DEGREE OF AIR TIGHTNESS AND CLIMATIC DATA

摘要

This study presents a simple method, developed for estimating annual air infiltration rates in single-family detached houses. The input data to this technique are: measured building air tightness, wind speeds, and the indoor-outdoors temperatures. Six test buildings of the same size, constructed of different building materials were involved in the study. The air tightness of these buildings was determined by using pressurisation method at 50 Pa pressure difference. Infiltration air change rates were measured by using tracer gas - concentration decay method and also calculated by using the developed technique. In addition, four other infiltration models were used to predict the air infiltration namely: LBL, Kronvall, ASHRAE, and CEN models. Measured and calculated/predicted infiltration results were compared. A very close correlation between the measured and the calculated results, obtained by using the developed technique and the other infiltration models was observed.