EVALUATION OF THE EFFICIENCY OF APPLYING WOOD PYROLYSIS STEAM-GAS PRODUCTS AS A WORKING FLUID FOR GAS TURBINE AND INTERNAL COMBUSTION ENGINE

The relevance of the topic is caused by the possibility of using such energy resource as a steam-gas products of pyrolysis of wood waste as the main or auxiliary fuel for electrical energy generation. These areas associated with a decrease in carbon emissions will allow expanding the scope of pyrolysis as a means of processing industrial waste, minimizing their impact on the environment. The main aim is to study the issues of increasing the efficiency of electric power generation of internal combustion engines and gas turbine plants working on pyrolysis products of wood waste in order to reduce the consumption of non-renewable energy resources, such as coal, oil and natural gas. Objects: wood waste pyrolysis unit, internal combustion engines and gas turbine plants operating using steam-gas products of wood waste pyrolysis. Methods: numerical research methods based on mathematical simulation of systems and elements of internal combustion engines and gas turbine plants based on material and energy balances. Results. The authors have developed a mathematical model and a simulation program for internal combustion engines and gas turbines burning steam-gas pyrolysis products. A parametric analysis on the influence of the steam-gas products outlet temperature from the pyrolysis plant on the efficiency, electric power and temperature of the exhaust gases of the considered power units was carried out. It was found that for utilization of steam-gas pyrolysis products in order to obtain electrical energy, the most efficient solution is an internal combustion engine operating via Trinkler thermodynamic cycle and a gas turbine unit using according to Brayton thermodynamic cycle, while the absolute electrical efficiency in the nominal operating mode of the pyrolysis unit is 23.34 and 22.28 % respectively. It was found that when using steam-gas pyrolysis products as an auxiliary fuel together with methane with a volumetric fraction of 25 %, the decrease in the power of the power unit is expected to be no more than 10 %.