Emission Dispersion Modelling using AERMOD on GT 1.3 PLTGU Muara Karang in Evaluate Combustor Upgrade Effect

Muara Karang power plant dominated by Gas Turbine Power Plant. One of those there is Gas Turbin 1.3 has been upgraded, thus make load ouput become increased. This study aims to see the emission dispersion generated from combustor before and after being upgraded. The emission data is obtained from combustion modelling on combustor GT 1.3 pre and post extendor using CFD methode. Then, the data will be used for emission dispersion modelling using AERMOD. The emission dispersion modelling uses two condition. First is the initial state based on environment assessment document in 2010 and second is in current environment state. The modelling shows that after the combustor upgraded, the NOx emission increase by 15%, CO emission decrease by 37%. Emission dispersion modelling result shows that there is a change in the area that has the highest concentration. In the initial environment state, area with highest concentration is on the west side of the power plant with NOx concentration is 35.46303 ug/m 3 , And CO concentration is 1.3362 ug/m 3 . In the current environment state, the area is on the east side of the power plant area with highest concentration is NOx concentration is 61.47481ug/m 3 And CO concentration is 2.3163 ug/m 3 .