A new type of maneuverable combined-cycle plant with a steam-turbine drive of a low-pressure compressor is considered. The analysis of its technological processes in the generation of electric and thermal energy in heating and non-heating periods of the year is carried out. It is shown that in heating conditions, the burning of additional fuel in the afterburner between the stages of the evaporator of the utilizer boiler provides an increase in its steam production, maneuverability, thermal and electric power of the CCGT-CHP plant. The influence of the chemical composition and thermophysical properties of natural gas on obtaining the required excess air in the combustion chamber of a combined cycle gas turbine is considered. A mathematical model of technological processes is developed. The influence of deep utilization of the heat of the flue gases of the utilizer boiler on increasing the efficiency and improving the environmental characteristics of the gas-steam plant of a thermal power plant was recorded.

The prospect of the decentralized combined cycle gas turbine-combined heat and power plant (CCGT-CHPP) creation for energy supplying of the city's neighborhoods, which are located far from centralized CHPP, is described. The new type of CCGT-CHPP is suggested with waste-heat boiler with mean steam parameters and afterburner chamber placed between its evaporation stages. Fuel afterburning influence on the electric and heat power and increasing and electric energy output on the heat source increasing is shown.  Index Terms-decentralized combined-cycle gas turbine combined heat and power plant (CCGT-CHPP), gas turbines, afterburning chambers, cogeneration Artem Andreevich Shimanov, assistant of heat engineering and heat engines department

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The reduction of proven hydrocarbon reserves stimulates research on the implementation of the comprehensive program “Hydrogen Energy and Fuel Cells”. The high calorific value of hydrogen and the ecological purity of its combustion products determine the prospects of using hydrogen fuel in large-scale and small-scale energetic.