Environmental optimisation of gas fired CHP engines

The efficiency and emissions from lean burn natural gas engines are very dependent on parameters as ignition timing and excess of air (air/fuel ratio). Mostly, adjustments leading to lower NOx emissions lead to increased emissions of unburned hydrocarbons (UHC) and CO.
From measurements the project will provide information on emissions and efficiencies for natural gas fired engines at CHP plants in Denmark at different engine settings. In this way it is determined how other emissions and efficiencies are effected by changing engine settings in order to reduce e.g. NOx emissions.

This knowledge will be combined with information on emissions, efficiencies and total fuel consumptions of the different models of natural gas fired engines installed at CHP plants in Denmark as well costs of externalities of different species in flue gas from natural gas fired engines.
From these data the potential of decrease in external costs for natural gas fired engine based CHP in general in Denmark will be assessed.  Based on the findings the effect of NOx reduction on plant and welfare economy will be assessed.