DEVELOPMENT OF A PROCESS FLOW DIAGRAM FOR A TRINARY POWER PLANT WITH MINIMAL EMISSIONS OF HARMFUL SUBSTANCES INTO THE ATMOSPHERE

Today, most of the world's electric energy is generated by burning hydrocarbon fuels, which causes significant emissions of harmful substances into the atmosphere by thermal power plants (TPP). In world practice, power facilities successfully use systems for cleaning flue gas from nitrogen oxides, sulfur and ash, but reducing carbon dioxide emissions at TPP is still difficult for technical and economic reasons. Thus, the introduction of carbon dioxide capture systems at modern power plants is accompanied by a decrease in net efficiency by 8−12%, which determines the high relevance of developing methods for increasing the energy efficiency of modern environmentally friendly power units. The purpose of the work is to develop and study combined-cycle power plants with an integrated steam methane reforming unit with minimal emissions of harmful substances. In the present work, the research revealed that the net efficiency of a binary CCGT with integrated post-combustion capture technology is 39.10%, binary CCGT with integrated pre-combustion capture technology- 40.26%, trinary CCGT with integrated post-combustion capture technology- 40.35% and a trinary CCGT with integrated pre-combustion capture technology- 41.62%. The highest efficiency of a trinary CCGT with integrated pre-combustion capture technology is due to a decrease in energy costs for carbon dioxide capture by 5.67 MW relative to CCGT with integrated post-combustion capture technology, and an increase in the efficiency of the CCGT steam-water circuit by 3.09% relative to binary cycles.