CFD for environmental studies

Condenser Flue Gas

This example investigates the efficiency of horizontal condensers installed near an industrial park. Blowers within the condensers force air through horizontal heat exchangers. The heated air (exhaust) is then blown out at the top of the condenser.

The efficiency of these condensers depends on the inlet temperature of the air flowing through the heat exchangers. If the exhaust air is recirculated due to wind and geometrical effects the overall condenser efficiency will decrease drastically.

The picture shows the exhaust gas emission. The exhaust gases from the larger condensers flow upwards and are inclined as dictated by the wind direction. The exhaust gases emitted by the small condensers are influenced by the eddies generated by the wind flowing around the buildings nearby.

Courtesy of GEA Management und Gesellschaft für Wärme und Energietechnik mbH.

Exhaust Gas Emission

This example shows the exhaust gas emission when considering a stably stratified atmosphere. The wind direction is given by the vectors displayed.

The isosurface displays the position of 3% exhaust gas concentration. The volume within the isosurface has a large exhaust gas concentration. The pressure distribution is plotted on the isosurface. Hotter colours indicate higher pressure values. Thus the pressure near the chimney is higher than further away from it.

Courtesy RW-TÜV Anlagentechnik GmbH.