A review of methods for calculating microclimate parameters is performed. The possibility of using existing mathematical models to describe the aerodynamic characteristics of ventilation valves and optimize their performance indicators: productivity, hydraulic resistance, density, response time and other parameters that form their efficiency is considered. In order to assess the correspondence of the obtained mathematical dependencies, a physical experiment was conducted. The adequacy of the mathematical model was verified by comparing the results of calculating the parameters of the internal environment in the SolidWorks software and computing complex with experimental data.

Keywords: microclimate parameters, heat and mass transfer, mathematical modeling, heat transfer resistance, experimental study of microclimate, air mobility, valve

The use of biogas complexes has found wide application, first of all, as a solution to environmental problems associated with the disposal of waste from the agro-industrial complex, as well as obtaining additional types of energy and organic fertilizers. Many designs of biogas plants have been developed that are suitable for operation in various climatic conditions. The choice of a biogas plant design is the most important stage of the planning process. The article discusses the improvement of the bioreactor installation in order to obtain a larger volume of final raw materials, increasing its quality and efficiency of the installation as a whole. The conditions that contribute to improving the efficiency of biogas plants are determined. The technical characteristics of the biogas plant are presented. The pros and cons of bio-installations, their impact on the environment are considered. The prospects for the development of this energy sector in Russia are assessed.

Keywords: biomass, biogas plant, gas production process, waste disposal, harmful emissions

The article presents an overview of the current situation in the field of energy saving of the Russian Federation. Topical issues of energy efficiency control of buildings and structures as an energy saving tool are considered. The proposed approach allows, while maintaining the General ideology of SP 50.13330.2012 "Thermal protection of buildings", to modify the scale of energy efficiency of buildings and structures, to make it comparable with similar scales adopted in leading European countries. A similar approach to solving this problem is implemented in order to move from the percentage deviation of the level of heat loss (from some basic value) directly to the specific level of these heat losses per unit area. The formula allowing to calculate both normalized and actual value of heat energy consumption for heating and ventilation of buildings is deduced. In the future, the above-mentioned formula is transformed into a formula that takes into account engineering solutions, both with a direct-flow ventilation system and with the use of a recuperative heat exchanger.

Keywords: heat supply, housing and communal services, energy efficiency, energy saving, energy efficiency scale, specific energy consumption, regulatory framework

the article presents a possible concept of improving the flat solar collector in order to intensify the heat exchange process, which increases the quality and efficiency of the equipment under consideration. A brief description of the proposed configuration of the device is given. The positive aspects of such technology are described

Keywords: energy saving, heat exchange process intensification, independent heating circuit, irrational energy consumption

the article considers the possibility of increasing the efficiency of the solar collector by improving its heat exchange panel, which is implemented by optimizing the heat exchange processes using the concept of combining the thermal properties of different metals. The positive aspects of this method are described. A brief description of the comparative analysis is given

Keywords: heat exchange panel, energy saving, solar installation, alternative energy sources, thermal properties, heat transfer optimization, solar collector, heat exchange intensification

Abstract: This paper presents an overview of the current situation in the field of alternative energy development countries in the world and Russia. An number of factors influencing the development of renewable energy in the world and Russia. It presents the total investment in alternative energy in the world. The prospects of growth in the Russian and global alternative energy market. The urgency of the problem lies in the energy security and the protection of the interest of the environment

Keywords: power consumption, energy saving potential, alternative energy sources, energy strategy, energy balance, investment, government support, power supply