Laboratory fume hood is a local exhaust system for controlling harmful substances generated in handling various organic solvents, acids and alkalies in the laboratory. The laboratory fume hood is equipped with a vertically open door that can be opened...
Laboratory fume hood is a local exhaust system for controlling harmful substances generated in handling various organic solvents, acids and alkalies in the laboratory. The laboratory fume hood is equipped with a vertically open door that can be opened and closed on the front of the hood, and a bypass-type grill and an upper exhaust duct is provided in the upper part of the hood to form a uniform exhausting force in the opening face. In this study, numerical predictions of air flow characteristics inside a fume hood with internal baffles and a louvered bypass are obtained, and the abnormal flow characteristics in the fume hood according to the change of the inlet area of the fume hood are analyzed through computational fluid analysis. The reaction time necessary to maintain the safe average speed at the inlet of the hood is obtained,