Water Spray System as Reducing Negative Effect of Welding Emissions

Abstract

The water spray system is a type of technology where it helps to keep the Local Exhaust Ventilation (LEV) system clean when the smoke is discarded into the environment and prevent the worker from inhaling welding fumes. The objective of this research is to conduct a simulation of a filter box with a water spray as a filter welding fumes based on the effects of applying different liquid pressure by using Computational Fluid Dynamics. A geometric model of a spray nozzle is designed using SolidWorks 2019 and analysed via a CFD software, ANSYS Fluent. The inlet and outlet dimension parameter of the filter box used is 124.24mm, while the orifice of the V6 nozzle is 0.25mm. The working fluids used in this simulation are carbon-monoxide, nitrogen-oxide, and water-liquid. The CFD simulation was carried out for different pressure at the V6 nozzle ranging from 1 bar to 3 bar. The amount of volume fraction for carbon-monoxide and nitrogen-oxide showing a drop in number according to the amount of water-liquid volume fraction. The simulation showed that this model could be used and securely used for an indoor workshop. The results from simulation show the two (2) bar pressure offers the most compatible water spray for the dimension of V6 nozzle. This simulation is likely to succeed because it can reduce the welding emissions before being discharged to environments.