Energy input affects the final cost of dairy products. The paper features energy cost optimization in dairy industry and, in particular, in the production of cultured milk foods. The present research studies the options for renewable energy sources in dairy industry: solar system is becoming a very promising means of energy saving in the southern regions. The authors proposed a complex energy substitution device, which can reduce the electricity costs by 60–70%, according to preliminary calculations. The results obtained in the theoretical underpinning of design parameters and operation modes were checked by experimental studies. For the experiment, the authors designed and manufactured a water heating system based on flat solar collectors. An instrument complex registered temperature values in eight different control points and transferred the signals to a PC hard disk. The article presents the parameters of the equipment in pasteurization and milk fermentation processes with the use of the complex energy substitution device for water heating. The equipment can be used by large-scale dairy enterprises, since the area of the collectors for the preliminary water heating is 2 m2, which provides 150 litters of water with a temperature of 45–60°C. As the normative parameters of the temperature during the milk fermentation process is 32–35°C, and the water temperature in the device is 45–60°C, it can be concluded that the thermal costs are fully covered.

Article is devoted to increasing efficiency of heat supply systems. We demonstrate research results and an analysis of dependences of overall heat supply system performance indicators at various levels of equipment of consumers with the automated individual heating substations.

Summary Research is devoted to increase in system effectiveness of transportation of thermal energy. The control system of thermal insulation properties realized in the environment of LabVIEW is developed. Assessment of transport losses of heat taking into account real service conditions of pipelines and heterogeneity of thermal insulation properties is carried out. Influence of extent of aging of thermal isolation on increase in size of density of a thermal stream is shown. Calculation of specific thermal losses of an elevated steam line taking into account thermal destruction of isolation is carried out.

The results of modeling of the polyextracts obtaining process under electromagnetic field conditions are presented. The scheme of formation of traditional diffusion and additional hydrodynamic components from solid phase of raw materials is shown. The stages of solid phase and extactant interaction under electromagnetic field conditions are considered. The principal scheme of line of the polyextracts and their concentates production is presented.

Objective. The goal of the study is to identify ways to improve energy efficiency by conducting a comprehensive analysis of engineering systems of a house, taking into account the existing model of energy supply and by monitoring the indicators of influence on the efficiency of engineering and technical equipment. Methods. The main method is based on a survey of the level of energy efficiency of heating and hot water supply systems. Results. The article discusses the concept of energy efficiency of a building, energy efficiency class, main utility systems of a residential building, indicators of influence on the state of systems, engineering component and ways to improve it. The article addresses issues related to a full analysis of existing systems in order to assess the implementation of necessary energy-saving measures, as well as their risks and benefits. The possibilities of controlling energy consumption and efficiency of works carried out due to the reconstruction of utility systems of the building have been determined. The results of the analysis of energy-efficient measures, and the feasibility of implementing each of them have been determined in order to identify optimal solutions. Conclusion. Increasing the energy efficiency of building utility systems is one of the priority tasks for creating comfortable living conditions. The energy efficiency class of building utility systems is established according to the state of a system, takes into account all quality indicators for energy consumption, and the energy certificate fully shows the level of energy efficiency.