Environmental optimisation of gas fired engines in Denmark - measurement

Measurement of emissions and efficiencies of natural gas and biogas fired engines

Emissions of unburned hydrocarbons (UHC), NOx and CO from stationary natural gas fired engines can be reduced by both improved engine design and by modifying the engine settings. Normally, there is a trade-off between low NOx emissions and low UHC emissions. This means that if engine operation is changed in order to reduce NOx emissions, higher UHC emissions will often be a negative side effect. Furthermore, it is well known that the electrical efficiency of the CHP engines is affected by varying engine settings.

In order to examine how much emissions and efficiencies are affected by varying engine settings, a number of measurements were conducted on different natural gas fired engines based on CHP units in Denmark.