Study of natural ventilation for a modular façade system in wind tunnel tests

摘要

Wind tunnel tests are a reliable tool to determine the effect of natural ventilation onbuildings. This paper presents results of wind tunnel tests conducted to evaluate the influenceof ventilation modules positioning on a façade system. Modules positioning was modified,resulting in different façade configurations. The tests were carried out with the use of a model,varying the position of the ventilation modules in the façade configuration. The cases testedwere six ventilation modules positioned below the window-sill (ventilated window-sill), andthree ventilation modules positioned above and below the façade. The façade system proposedwas movable and interchangeable so that the same basic model could be used to test thepossibilities for ventilation. Wind speed measurements were taken inside and outside the modelfor the different façades configurations to evaluate the best performance in relation to naturalventilation. Singleâ sided and Cross ventilation were considered for wind speed measurements.Results show the use of six ventilation modules positioned below the window-sill, forming "a ventilated window-sill" is the best solution in terms of natural ventilation.