SO2 DISTRIBUTION SIMULATION TO ESTIMATE THE MAXIMUM DISTANCE DISTRIBUTION OF POLLUTANTS USING COMPUTATIONAL FLUID DYNAMICS (CFD) (CASE STUDY: PT. PERTAMINA REFINERY UNIT IV, CILACAP)

• Main Author: ANHAAR (NIM : 12811040), JANNATA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22675
• Institution: Institut Teknologi Bandung

SO2 gas distribution would be a danger if it accumulates in densely populated areas so in this study used methods of Computational Fluid Dynamics (CFD) to simulate the pattern of spread of pollutants to determine the maximum distance spread of pollutants in the event of wind maximum and minimum wind to determine due to the pattern of spread of SO2 gas influence local wind direction. The timing of this research is in the June- August 2014 due to low rainfall so pollutants will be longer retained in the atmosphere. Selection day for the day is where there is a local wind phenomena due to the spread of pollutants greatly affected by local atmospheric conditions. Selection of data using the data Final Analysis (FNL) by the methode of filtering sea breeze day and selection of wind speed. In this study WRF models used to determine local wind direction and CFD models are used to simulate the dispersion of pollutants. <br /> <br /> <br /> The simulate result using WRF shows the influence of local wind on the previous day had made the selection sea breeze day, while evenings starting at 1:00 am the wind direction towards the sea, while at 13:00 pm the wind direction toward the land. From the simulation results using the CFD spread of pollutants is the maximum distance of 940 m from the source of emissions with low concentrations whereas the minimum distance of 360 m with the distribution of pollutant concentrations higher then the results obtained on the safe distance to residential areas around the PT. Pertamina Refinery Unit IV, Cilacap is approximately 1 km from the emissions source.