The natural pressure differential – Wind infiltration. Results from a long-term measurement

Purpose of the work

The pressure differential at the building envelope results from wind pressure and thermal lift. European and German standards include in the calculation of corresponding infiltration the parameters wind speed, temperature differential, and the wind pressure coefficient from building inflow and outflow. This long-term measurement is to compare the calculations to the pressure differentials measured.

Method of approach

Measurement of the pressure differentials at the building envelope throughout the year of unit in an apartment building in Berlin city center and a unit in an apartment building on Heligoland. Capillary tubes were used to log the pressure differentials through the window rebate of various windows while the wind speed at the location was recorded.

Content of the contribution

The presentation shows the measurement results for the differential pressures at windows of different orientations in relation to the wind speed recorded around the location.

Results and assessment of their significance

Since the measurement series has not been finished yet, a final evaluation is not yet possible at the time of submitting this abstract.

Note

For more information, please contact the reference author at: solcher@waermetauscher.com