Abstract
Controlling the air quality is of the utmost importance in today’s buildings. Vertical air curtains are often used to separate two different climatic zones with a view to reduce heat transfer. In fact, this research work proposes an air curtain aimed to ensure a proper separation between two zones, a clean one and a contaminated one. The methodology of this research includes: (i) small-scale tests on water models to ensure that the contamination does not pass through the air curtain, and (ii) an analytical development integrating the main physical characteristics of plane jets. In the solution developed, the airflow is extracted from the contaminated compartment to reduce the curtain airflow rejected to the exterior of the compartment. In this research work, it was possible to determine the minimum exhaust flow necessary to ensure the aerodynamic sealing of the air curtain. This article addresses the methodology used to perform the small-scale water tests and the corresponding results.
Highlights
Air curtains consist of plane jets that are frequently used to separate different environmental zones
Air curtains have been employed for several purposes, such as: HVAC (Heating, Ventilation and Air Conditioning) [1,2,3], smoke control in passageways [4,5], airborne pollutant, and biological control [6,7,8]
Conclusions this research, small-scale water modelling was was used assess the the hydrodynamic sealingsealing of a. In this In research, small-scale water modelling usedtoto assess hydrodynamic of a curtain formed by a plane jet
Summary
Air curtains are basically designed to reduce or control both heat and mass transfers, as well as to reduce the spreading of airborne contaminants between two zones. Their application is useful when the physical barriers are not viable, for several reasons. In this framework, air curtains have been employed for several purposes, such as: HVAC (Heating, Ventilation and Air Conditioning) [1,2,3], smoke control in passageways [4,5], airborne pollutant, and biological control [6,7,8]. The plane jet induces a shear stress between the airflow and the stagnant ambient air, which promotes air entrainment. The turbulent structures promote air mass entrainment and mixing from both sides into the jet
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