Due to continuous combustion, turbine engines are a very good solution for implementation of dislocated units for production of heat and mechanical power. The continuous combustion enables use of renewable fuels and fuels obtained from waste with demanding chemical and physical properties. For the successful implementation of turbine engines, individual fuels must be checked against technical limitations and their environmental suitability. For this purpose, we performed an analysis of pollutant emissions using highly oxygenated fuel (glycerol). We also tested the possibility of reducing pollutant emissions through exhaust gas recirculation. The results were compared with a previous analysis performed with conventional diesel fuel.
In regenerated Joule cycle, we achieved 8 % and 13 % exhaust gas recirculation rates, which in both cases, while maintaining the concentration of nitrogen oxides, we were able to further reduce emissions of carbon monoxide, particulates and unburned hydrocarbons. This indicates an increased resistance of oxygenated fuels to particulates formation and combustion intermediates.
To further increase exhaust gas recirculation rates, we designed model of heat exchanger that will be used for cooling recirculated exhaust gases. In future of research, heat exchanger will enable performing of measurements at high temperatures and high exhaust gas recirculation rates, while at the same time achieving sufficiently low temperatures at the inlet to the compressor.