About 60 % of Russian territory doesn't have centralized energy supply. Energy supply of these areas is carried by gas or diesel fuel oil cogeneration power units. Natural gas is a chemically valuable and expensive product not exceeding 25% of the fuel and energy balance in the power generating of the most developed countries. Natural gas is approximately 53% of the fuel and energy balance in Russian energy. Diesel fuel oil is expensive due to high transport costs for delivery to the place of consumption. As a result, the electricity cost of cogeneration power units is higher than cost of centralized generation in 30-35 times. Development of the power plants using local resources of low-grade fuel for decentralized energy supply is a relevant obj ective. Purpose of this paper is to research the Russian cogeneration market and the development of advanced heat and electricity generation technologies by conversion of low-grade fuels. Cogeneration market analysis and patent research is presented; basic requirements are formed for the modern power plants according to these results. The principle of cogeneration by means of a fuel element based on low-grade fuel conversion was proposed and tested in an experimental unit. As a result, technical solutions of the cogeneration power unit were developed.

Abstract. Low-temperature vortex combustion numerical simulation was performed using FIRE-3D software. Low-temperature vortex combustion aerodynamic and heat-andmass transfer versus coal dust size range characteristic were analysed. The results are presented in graphical form. P-49 Nazarovo station steam generator model was created. The results of the numerical modelling are suitable for coal dust size range effect on lowtemperature vortex combustion analysis.

Abstract. Low-temperature vortex combustion technology was researched. FIRE-3D software package was used for combustion simulation in P-49 boiler of Nazarovo power plant with excess air ratio Į=1,072 and fuel rate ȼɪ=39,444 kg/s. Aerodynamics, oxygen concentration and temperature fields were calculated and represented in graphical form. Obtained results show necessity of follow up research of combustion technology.

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