Development of a mobile wood burning power plant for autonomous power supply of forestry facilities

The relevance of the theme is due to the large resources of wood in areas remote from centralized power supply and gas supply networks. Autonomous energy supply of such objects of the forestry complex can be organized using wood fuel. The aim of the study is to increase the efficiency of autonomous energy supply of timber complex objects by developing and optimizing wood-fired mini-power plants. The method is to numerical modeling. For this, a simulation model of a mini-power plant was developed using the SimInTech dynamic simulation program. We have made the numerical experiments using this mathematical model. The article presents a technological scheme of a mini-power plant based on an open cycle gas turbine, a Rankine organic cycle turbine and wood fuel gasification. The results of numerical simulation of the operation of a mini-power plant with an electric power of 3,8 MW in the SimInTech program using the tools of the Thermal Hydraulics module are presented. The main technological parameters of the power plant in the nominal operation conditions are calculated: pressures, temperatures and mass flow rates of working fluid flows of power plant cycles and heat carriers. We have also calculated the rated mechanical powers of the units: the compressor of the gas turbine plant and the gas turbine, the fan of the organic working fluid condensation system, the Rankine cycle turbine running on R113 freon, and the pump for supplying freon to the evaporator. The proposed model allows you to explore the operating modes of the power plant, with variable environmental parameters, to select the optimal design and operating parameters of the components of the mini-power plant. In particular, the dependence of the net efficiency of the power plant on the consumption of cooling air for the condenser of the organic working fluid was studied. As a result, the optimal values of the cooling air consumption were determined according to the condition of maximizing the net efficiency of the power plant. The obtained results contribute to further technological and constructive improvement of power plants. The results of the study can be used to substantiate the effectiveness and feasibility of projects for autonomous power supply of industrial facilities.

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