The aim of the paper is to present approaches to the use of computer modelling of solid fuel combustion in a fixed bed in furnaces and boilers of small capacity. The principles of modelling solid fuel combustion in Ansys Fluent are considered. The method of calculation model construction for solid fuel combustion in a fixed layer in furnaces and boilers of small capacity is proposed. Since combustion is characterised by great complexity in modelling, in order to simplify the model, the fuel layer was not separated into a separate computational domain and was replaced by boundary conditions, and the computational domain contains only the gas part. In the model the fuel enters the calculation area corresponding to the gas part through the surface of the area limiting the solid fuel, combustion takes place at the boundary of solid and gas areas and in the form of heterogeneous combustion reaction of solid carbon and in the gas area in the form of gas-phase reactions of oxidation of CO and hydrocarbons of released volatile substances. Simplifications of the model are the absence of carry-over of unburned particles. The adequacy of combustion modelling is proposed to be checked by comparison of the modelling results with the results of fuel combustion calculation (composition of combustion products and temperature), content of harmful substances and analysis of combustion along the course of gas flow in the calculation area in the current lines.

Reliability of open steam pipelines is highly important for modern heat power plants. The majority of steam turbines use steam at supercritical parameters, so high-temperature strength of the pipelines must provide safe and effective work. This paper purpose is to explore creepage deformation of open steam pipelines (12KH1MF) which transfer steam from steam generators to steam turbines. The main index of this research is creepage. Also the research considers elastic and plastic deformation. During the research isochronal curves of creepage and creepage deformation of tension characteristic diagram was fulfilled. Usage of creepage isochronal curve gives a possibility to present information as graphical dependence.

The article discusses the transition to the use of a wind power plant (WPP) for autonomous power supply of a greenhouse with an area of 20 square meters. m in order to ensure sustainable and environmentally friendly energy supply. The transition to wind turbines is driven by the desire to reduce dependence on traditional energy sources and reduce the carbon footprint of agricultural activities. The key stages of designing and calculating the power of wind turbines necessary for a stable power supply to the greenhouse are described, including the needs for heating, lighting and ventilation. Climatic and wind conditions affecting the efficiency of wind turbine operation are analyzed, and calculations of the daily energy consumption of the greenhouse are provided. The article highlights the economic and environmental benefits of using wind turbines, such as reducing operating costs and supporting sustainable agriculture. In conclusion, recommendations are given for the selection and installation of wind turbines, taking into account the specific requirements of the greenhouse and operating conditions.

The problems of the microclimate in the production premises lead to an increase in energy costs for the station's own needs and a deterioration in the well-being of the maintenance staff. To avoid this, it is first necessary to analyze the variations of the main parameters. Therefore, the main building (boiler and turbine shop) was chosen for the study Ivanovo CHPP-2. The pilot study was conducted twice a month between 2020 and 2023. As a result of the research, experimental data on the main indicators of the microclimate of the main building of thermal power plants were obtained. The microclimate parameters were measured at the main operating levels in the turbine and boiler rooms during warm and cold periods of the year. The analysis of the obtained data on the microclimate revealed deviations of a number of parameters from the normal values such as temperature, humidity and concentration of volatile substances. The total temperature deviation from the norm in the boiler turbine shop was 15 °C in the warm period, and 7.2 °C in the cold period. Humidity differed by 7.12% in the warm period and by 12.26 °C in the cold period. The maximum deviation of the concentration of volatile organic substances in the air was 6.87 mg/m3.