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Air pollution is one of the problems faced by all countries around the world no exception in Indonesia, POPKA factory which becomes one of the biggest industrial factories in Indonesia uses Heat Exchanger engine to cool down the gas emission. Although the simulation oh Heat Exchanger has been widely used, it is considered as steady in under several conditions. Accordingly, these conditions produce less resemble with actual condition. Furthermore, the calculation method which is used does not give a high accuracy, therefore another method in calculating the formed mathematical modeling is necessarily employed. This research created a new model mathematics to overcome the problems which could display the effectiveness of Heat Exchanger type intercooler in cooling down the residual materials of POPKA factory uses finite element method and could be uses to manage the residual emission into the air. The iteration process uses MATLAB software and the simulation process uses FLUENT software. Based on the research at the temperature of gas emission with the influence of environmental temperature 290 K decreased to 59,153 K, The temperature of gas emission with effect of environmental temperature 293 K decreased to 97,697 K, and the temperature of gas emissions with influence of environmental temperature 296 K decreased to 130.36 Kelvin. So it can be concluded the higher the temperature of the environment then the longer time required to cool exhaust gas emission and conversely. During the process of cooling the exhaust emissions gas in the Heat Exchanger, the exhaust temperature of gas emission with the effect of 1 m / s fluid flow velocity decreased to 0.7478 K, the temperature of gas emission with the effect of 1.5 m / s fluid flow velocity decreased to 211, 99 K, and the temperature of gas emissions with the effect of 2 m / s fuid flow velocity decreased to 284.78 K. So it can be concluded that the higher the flow rate of gas emission, the time required to cool the exhaust gas emission is also longer, and conversely. Therefore, to minimize the exhaust gas emission level the plant is expected to condition the ambient temperature of the engine and adjust the fluid flow rate while inside the engine so that the cooling process does not last long and the exhaust emissions are not too high.

Residuals Gas Emission, Heat Exchanger, Intercooler