Geographical distribution of incremental air pollution (annual average) from nitrogen dioxide (NO2) resulting from emissions of the CHP plant in Freimann (click to enlarge)
This corresponds to 0.38% of the limit value of the 39th BImSchV of 40 μg/m3 in the annual average and is considered irrelevant according to TA Luft (Technical Instructions on Air Quality). The limit values of the 39th BImSchV are currently exceeded near busy roads in Munich. SWM applied for an emission value of 50 mg/m3 of exhaust from the gas turbine under standard conditions. That is 17% less than the limit value. The small additional load in ambient air is therefore permissible. At the public hearing before the licensing authority (Government of Upper Bavaria) on 27.06.2017, the results were discussed with intervenors.
Environmental Impact Assessment for the Replacement of Gas Turbines at the München-Freimann CHP Plant
Under contract with the City of Munich Public Utility Company (Stadtwerke München, SWM) ifeu scientists Bernd Franke and Benedikt Kauertz prepared the Environmental Impact Assessment (in German) and the technical expert report on the air quality in the licensing process for the exchange of the gas turbines at the SWM CHP plant in Munich-Freimann. A major focus of the impact analysis were the nitric oxide emissions from the two gas turbines (2×145 MW heat input) and two hot water boilers (131 MW each). Assuming continuous operation at maximum emission concentrations, the annual NOx emissions amount to 662 tonnes per year.
Comparison of ambient air monitoring data for nitrogen dioxide (NO2) in Munich (annual average 2016) with maximum incremental impacts from NOx emissions of CHP plants operated by SWM (HKW Freimann and HKW Nord)