Validate of Local Exhaust Ventilation (LEV) Performance through Analytical, Experimental and Computational Fluid Dynamic (CFD): A Case Study Model

摘要

Local Exhaust Ventilation (LEV) system are a tools in engineering control stated in Occupational safety and health management system where to protect a workers from inhale the contaminant that will effected to their breathing system. To design, construct and applications of LEV are followed an international guidance such as American Conference of Governmental Industrial Hygienist (ACGIH). A sample two inlet and outlet of LEV system are design based on ACGIH including hood, ducting branch, main ducting, elbow, y-tee, fan and stack. The design is based on ACGIH standard with assuming the contaminant are fumes with 2 inlet of 6 inches round duct and outlet is 8 inches round type. The result from calculation according to the size of branch duct size, main duct size, fan capacity and stack size. Other data contribute are velocity and pressure drop along the duct. LEV system are design by using Solid Work Software and export file to Ansys 14.0, where the simulation are used to compare the result of velocity and differentials of pressure before proceeds to construct the system as additional in design process as follow in ACGIH Standard. Finally result of this study indicated that no significant different of the result of velocity along the ducting between design, experimental and compare with the simulation results. Where the analysis shows different compare with analytical almost below 30% and further study on comparative different of static pressure should carry out.