Abstract
Abstract HVAC systems play a pivotal role in determining the overall energy consumption of industrial production halls and workshops, thereby emphasizing the necessity to optimize ventilation levels. Consequently, there is a paramount need to devise systems that strike a balance between energy efficiency and functional efficacy. This article elucidates a comprehensive investigation into the capture velocity of local exhaust ventilation (LEV) through the utilization of a purpose-built workstation within a controlled laboratory environment. The workstation, characterized by a 900 mm width and 450 mm depth worktop, was strategically outfitted with an exhaust duct proximal to the pollutant source, aligning with the operational objectives of the LEV system. The worktop was partitioned into square sections to facilitate precise documentation and subsequent reevaluation. Controlled fresh airflow was supplied through a duct positioned above the worktop. The study primarily centered on evaluating air velocity and turbulence intensity. Diverse configurations were experimented with at specified measurement nodes, and to avoid air extraction from behind the exhaust duct, a back sheet panel was installed. The results unequivocally demonstrated that the incorporation of a back sheet augmented capture velocities, underscoring its efficacy in enhancing LEV performance. These findings significantly contribute to advancing our comprehension of LEV efficiency and underscore the imperative of thoughtful design considerations and operational adjustments to ensure effective containment of contaminants within the operation environment.
Published Version
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