ACTUALITY. External insulation is one of the most damaged elements of high-voltage equipment. Changes in climate, ecology have an increasing impact on it’s condition. The proportion of overhead transmission line (OTL) outages due to pollution varies by region and specific operating conditions, but on average it can range from 20% to 40% of all OTL failures. In regions with high levels of industrial pollution or near sea coasts, this figure can reach 50% or more. The main causes of outages are related to the accumulation of contaminants on insulators, which leads to overtopping in wet conditions. It is precipitation such as drizzle, fog or dew that has the greatest impact, combined with various solid conductive particles deposited on the insulator surface from the air, and forming a layer of surface contamination. Methods for diagnosing insulation are various, including thermal imaging. OBJECT. To study the effect of wetted contaminated surface of glass and polymer insulators on their temperature under laboratory conditions and to evaluate the possibility of diagnosing the contaminated condition. METHODS. Three dozen laboratory experiments with suspended glass and polymer insulators in a fog chamber with thermograms, control of leakage current and degree of contamination were carried out to achieve the goal. During the experiments, the degree and method of contamination and humidification conditions were changed. RESULTS. In the course of laboratory studies it was shown that thermal imaging cameras can diagnose even lightly contaminated insulation in the wetted state. The mean and rms values of temperature contrasts depend more on the level of contamination (greasiness) than on the degree of uniformity of contamination application. The methodology of construction of the insulation control system on overhead power lines and the algorithm of automated data processing are proposed.

RELEVANCE. When building roads, preparing foundations for high–rise buildings, information is needed about such an important parameter as the density of the soil skeleton – the ratio of the mass of soil particles to the volume of the sample of an undisturbed structure. The precise determination of this parameter is an important task, since this parameter has a nonlinear dependence on humidity. Consequently, in a narrow range of humidity changes, the density of the soil skeleton becomes maximum, which makes such a soil the most favorable for construction work. PURPOSE. To develop an autonomous device for measuring soil moisture in the field. METHODS. The dielkometric method was used to develop a device for measuring soil moisture. This is an indirect method for measuring the humidity of substances based on the dependence of the dielectric constant of these substances on their humidity. RESULTS. An autonomous device for determining soil moisture using the dielkometric method has been developed, designed for use in the field, which significantly speeds up the process of analyzing and processing measurement results, and, consequently, the process of processing information about the state of the soil. During the project, experiments were carried out to measure capacity depending on humidity and temperature at various frequencies from 100 Hz to 100 kHz in various types of soils. CONCLUSION. A device for determining soil moisture was developed and a method for determining the moisture and density of the soil skeleton by the dielkometric method was proposed, preliminary experiments were conducted. However, during the experiments, a temperature dependence was found for low frequencies, so additional temperature calibration is necessary.

ACTUALITY. In the community of Russian specialists servicing oil-filled transformers, there is an established opinion that when the concentration of the phenolic oxidation inhibitor Ionol (DBPC) in the oil drops below 0.1% (wt.), the transformer oil begins to oxidize faster than in the absence of Ionol. This is the so-called “pro-oxidizing effect” described in 1968. Modern hydrocracking transformer oils differ significantly from the former oils in terms of hydrocarbon composition, but the opinion about the pro-oxidizing properties of Ionol remains, despite the lack of such information in foreign studies. OBJECTIVE. To reveal the presence or absence of pro-oxidative action of phenolic antioxidants, Ionol and 2,6-DTBP, when their concentration in transformer oil is reduced. METHODS. Two series of oil samples were prepared for the study: with Ionol and 2,6-DTBP additive. The concentration of additives: 0; 0.05; 0.1 and 0.2 % (wt.). VG grade oil produced by hydrocracking technology was used as a base mineral oil. All oils were subjected to accelerated thermal degradation at elevated temperature. Destructive changes in the hydrocarbon base of oils were analyzed by IR absorption spectra. Changes in the relative content of degradation products dissolved in the oil were analyzed using UV-visible absorption spectra. RESULTS. On the basis of the analysis of optical spectra of both series of oils, it was obtained that as the initial concentration of any of the phenolic oxidation inhibitors in the oil decreases, the intensity of thermodestructive changes in the hydrocarbon composition of the oils consistently increases. It is shown that in transformer oils produced by hydrocracking technology both additives in the concentration range of 0.05÷0.1 % do not show pro-oxidizing properties. It is concluded that the widespread idea about pro-oxidizing effect of Ionol at its concentration in transformer oil less than 0.1 % should be considered as not corresponding to reality.

RELEVANCE. A significant potential for increasing the energy efficiency of urban electrified transport is contained in the possibility of re-useful use of part of the energy spent on traction of rolling stock, recovered during braking, for performing transport work. The economic justification of the available methods of utilization of recovered electricity depends on its volume as a whole and the excess component of it available under standard technical parameters and conditions of movement of rolling stock, dissipated on brake resistors in the form of heat into the atmosphere. Theoretical simulation computer-mathematical models for calculating recovered energy do not yet take into account all the key parameters of real processes in the electrical subsystem of mountain electric transport. THE PURPOSE of the study was to carry out instrumental measurement of energy flows for various groups of electric power–consuming equipment of the urban electrified transport, as well as regenerative energy – useful and redundant. METHODS. Field experiments, electrical calculations, comparative analysis. RESULTS. In the course of the study, instrumental measurements of energy consumption and recovery in the actual operation of trams and trolleybuses were carried out. In addition, comparisons were made with the results of other domestic and foreign measurements. CONCLUSIONS. Indicators of recovery energy volumes and their dependence on the type and characteristics of rolling stock and weather conditions are obtained. The limiting values of the share of total energy recovery from traction energy consumption are revealed: for trams – about half and for trolleybuses – up to a third.

This paper presents a methodology for calculating thermal modes of 10 kV cable lines (CL) for different types of insulation and operating conditions, and analyzes using approximation functions of the obtained results. Regression models of dependences of estimated service life (Tsl) of CL insulation on loading factor (kzg) in different operating conditions of CL with the following types of insulation: paper-impregnated insulation (PI), insulation made of polyvinyl chloride plasticate (PVC) and insulation made of polyethylene (PE) have been developed. The results of the study can be used to clarify the parameters of CLs when selecting their cross sections. Application of the developed methodology for estimation of temperature parameters and regulation of CL operation modes will allow to reduce the number of emergency situations connected with thermal breakdowns. OBJECTIVE. To carry out research, analysis and calculations of temperature parameters of 10 kV CLs for different kzg and methods of laying in climatic conditions of the Republic of Tatarstan. METHODS. Methods of calculation of thermal parameters of 10 kV CLs in different modes and their service life, methods of statistical data processing in the Excel program complex and methods of function approximation are used. RESULTS. As a result of researches the temperature parameters of 10 kV CLs with different types of insulation for different operating conditions have been obtained, regression models of dependences of the calculated Tsl of insulation on kzg have been constructed, allowing to estimate the thermal characteristics of CLs. CONCLUSION. The results of the conducted researches and calculations can be recommended for estimation and selection of parameters of operating modes of 10 kV CL at the stages of operation and design of power supply systems.

RELEVANCE. The transition to an electric mode of transport is becoming more and more relevant due to the development of technologies in the field of electric motors and energy storage devices. One of the tasks set for specialists in the field of electric transport today is the transition of water transport from internal combustion engines to a fully electric drive. This article provides a calculation of an electric drive system of a modular design for small vessels. THE PURPOSE. The goal is to develop an electric drive system for small vessels, which will allow the use of an electric motor and energy storage devices in water transport. METHODS. The design of the electric drive system is based on the model-based design method. RESULTS. As a result, a block diagram of the installation for a small vessel was obtained. CONCLUSION. The creation of electric drive systems of modular design is poorly developed in the domestic mechanical engineering due to the lack of a developed electric transport infrastructure; the creation of domestic developments in this area is of a strategic nature for industry and energy.

AN ACTUAL PROBLEM in transformer design is to optimize its design, since it allows you to create a competitive transformer. One of the objective functions in optimization algorithms for high-voltage test transformers is the ratio of the leakage inductive reactance of the transformer, reduced to the secondary side, to the load capacitance. Since the objective functions in the optimization procedure must be found many times, it is advisable to use approximate analytical calculation methods to calculate the leakage inductance. THE PURPOSE of the article is to analyze the error of the traditional analytical method for calculating the leakage inductance of power transformers with a rectangular axial cross-sections of the windings, and to develop a refined analytical method that takes into account the main design feature of high-voltage test transformers, which consists in the trapezoidal shape of the secondary winding cross-section. The refined method takes into account the change in the number of turns in the radial direction while maintaining the basic assumptions of the traditional method. METHODS. The error is studied by comparing the calculation results using these methods with the results of a numerical calculation of leakage inductance based on a 3D magnetostatic field, which are accepted as accurate. RESULTS. It is shown that the calculation error using the method proposed in the article is significantly reduced compared to the error of the method developed for power transformers with rectangular winding cross-sections. The ranges of changes in the relative geometric parameters of the base transformer have been determined, in which the error of this calculation method does not exceed 10%. The TGI 50/100 transformer, whose rated power is 5 kVA, was chosen as the base transformer. The developed analytical method is recommended for high-voltage test transformers optimization algorithms.

RELEVANCE. The research aims to improve the regulatory framework governing the procedure for determining the estimated load of public buildings when integrating charging infrastructure for electric vehicles into the electrical installations of these buildings. THE PURPOSE. Determination of the schedule of electricity consumption, the coefficient of simultaneity and non-coincidence of maximums of the charging infrastructure for electric vehicles, with subsequent development of proposals for updating SP 256.1325800.2016 "Electrical installations of residential and public buildings. Design and installation rules" in terms of the methodology for determining the estimated load of public buildings when integrating charging infrastructure for electric vehicles into the electrical installations of the said buildings. METHODS. In achieving this goal, experimental, mathematical and statistical methods were used. RESULTS. A methodology for determining the coefficients of simultaneity and non-coincidence of maximums of electric vehicle charging stations has been developed, and their numerical values have been obtained depending on the type, power, and combination of simultaneously operating charging station connectors. Proposals have been developed for amending SP 256.1325800.2016 "Electrical installations of residential and public buildings. Design and installation rules" in terms of the methodology for determining the estimated electrical loads of the charging infrastructure for electric vehicles integrated into electrical installations of public buildings. CONCLUSION. The development of a methodology for calculating electrical loads simultaneously with the development of demand factors, simultaneity and the coefficient of mismatch of maximums of charging infrastructure for electric vehicles integrated into public buildings will contribute to the optimization of costs for technological connection to electrical networks.

THE PURPOSE. Development of digital models for calculating induced voltages on a pipeline created by a six-phase power transmission line in normal and emergency operating modes. METHODS. The studies were conducted on a computer model of an electrical network that includes a line of this type. Its formation involved an approach based on the use of phase coordinates. The modeling was carried out using the Fazonord software package, version 5.3.5.3-2024. RESULTS. The following operating modes of a 220 kV multiphase power transmission line were considered: symmetrical and open-phase with loads at the receiving end of 100 + j50 MVA per phase; single-phase, two-phase short circuits, as well as a two-phase ground fault. For comparison, the modes of a two-circuit three-phase power transmission line were modeled. The obtained results allowed us to draw the following conclusions: in a symmetrical load mode, a six-phase line creates induced voltages at certain points of the pipe that are more than three times greater than similar parameters for a three-phase power transmission line; however, the values of induced potentials do not exceed the permissible level of 60 V; in short-circuit modes, the maximum induced voltages in the transmission lines under consideration differ insignificantly; when one phase is disconnected, the induced voltages in a six-phase power transmission line go beyond the permissible limit, and in a three-phase line they do not exceed 60 V. CONCLUSION. The applied approach is distinguished by its universality and can be used to determine modes in networks of various configurations; the developed models can be used in the practice of designing sections of joint passage of promising six-phase power transmission lines and pipelines when developing measures to ensure the safe operation of service personnel.

The RELEVANCE of the study is to develop a controlled storage complex (SC) of electrical energy for modern distributed energy based on advanced innovative technologies. OBJECTIVE. To conduct experimental studies, confirm the main technical solutions incorporated into the SC design and develop design and technological documentation (DTD). METHODS. When solving the tasks, experimental methods were used to confirm theoretical studies and calculations of SC units and elements, implemented by MatLab®. RESULTS. The article describes the relevance of the topic, the ways and stages of developing the SPENE-1 SC energy storage device. The work was carried out in three stages. At the first stage, the functional structure of the storage complex, a mathematical model of the storage complex operation as part of an electrical network, methods for calculating parameters and controlling energy flows in electrical networks of various topologies, as well as the ECD for an experimental sample of the storage complex and the control system were developed. At the second stage, an experimental sample of the storage complex control system was manufactured and the experimental sample of the storage complex control system was adjusted and tested. A program and methodology for testing an experimental sample of the storage complex, including the control system, have been developed; methodological materials for conducting comprehensive tests of experimental samples and working documentation for upgrading the test facility have been prepared. At the third stage of the work, the following was performed: a) assembly, adjustment and testing of the NC for conducting joint comprehensive tests of experimental samples; b) determination of the optimal parameters of the NC, the main characteristics and the range of their changes; c) experimental tests of the critical parameters of the superconducting suspension of the rotor-flywheel of the experimental sample of the storage complex and its control system; d) experimental comprehensive tests of experimental samples; e) adjustment of the KTD based on the results of the manufacturing technology and experimental comprehensive tests. CONCLUSION. The results obtained in the work are of great importance for the development of distributed energy in the Russian Federation. The ECD of the storage complex and the test base, as well as regulatory documents for the operation of the storage complex in various power supply systems have been developed. The NC can be used in traction electric systems of electric transport, distributed electric networks with alternative power sources. The application of the developed NC is especially effective in power supply systems operating in low temperature conditions, for example, in the Arctic and space.

RELEVANCE of the study is to develop an algorithm for automated calculation of the technical condition index (TCI) for 110 kV gas-insulated circuit breakers according to the TCI calculation method developed by the Ministry of Energy of Russia. THE PURPOSE. To analyze the errors arising at calculation of TCI. To consider the problems arising at calculation of TCI and to offer ways of the decision of the given problem. To perform manual calculation of the technical condition index of the VEB-110 gas-insulated circuit breaker according to the approved methodology. Develop a working version of the algorithm for automated calculation of the technical condition index (TCI) for 110 kV gas-insulated circuit breakers according to the TCI calculation methodology developed by the Ministry of Energy of Russia. To carry out TCI calculation of VEB-110 circuit breaker with the help of the created algorithm. METHODS. The method of modeling of the TCI calculation method implemented in the Delphi7 programming environment was used to solve the task. RESULTS. The article describes the relevance of the topic, considers the peculiarities of TCI calculation for different types of circuit breakers. Manual TCI calculation and TCI calculation with the help of the developed algorithm for VEB-110 gas-insulated circuit breaker are made, the comparative analysis of the calculation results is carried out. In this paper the working algorithm of automated calculation of ITS for gas-insulated circuit breakers of VEB-110 type is modeled. CONCLUSION. The use of the algorithm of the automated calculation of TCI gives an opportunity to reduce (practically to exclude) the errors arising at manual calculation. Also the calculation time is greatly reduced and there is a possibility of more operative obtaining of data on the state of circuit breakers. The developed algorithm recommends the control action on the equipment based on its condition, thus facilitating the planning of repairs, maintenance of equipment. Based on the calculated TCI value, the circuit breakers are ranked according to the priority of inclusion in the maintenance plan.

THE PURPOSE. Development of technical solutions for the utilization of secondary boiling steam to reduce losses of thermal energy, steam and condensate of CHP plants. METHODS. Comparative studies of disposal options were conducted, and several schemes for condensation of low-potential energy sources were proposed. The economic effect of the proposed technical solutions for the utilization of steam emissions from CHP plants is calculated. RESULTS. To determine the technical characteristics of the auxiliary equipment, calculations were carried out on the amount of coolant. During the winter period of operation of the installation - a source of steam emissions, with a minimum evaporation rate of 2.5 t/h - about 10.99 t/h of cooling water (mains water) is needed for cooling and subsequent condensation of steam; with a maximum evaporation rate of 5 t/h - 21.99 t/h of cooling water (mains water), respectively. According to the calculation results, the OVA-16 shell-and-tube heat exchanger was selected, the heat exchange surface area of which is 16 m2. When implementing the proposed technical solutions for the disposal of evaporation, the economic effect was calculated, which amounted to: - with a minimum evaporation consumption of 2.5 t/h for heating mains water, during the heating period (on average 245 days) 82320-98020 rubles; with a maximum evaporation consumption of 5 t/h) 164640-184044 rubles, respectively.

THE PURPOSE. Study of extraction processes of plant raw materials with a wide range of biologically active properties, supercritical carbon dioxide used as a solvent, as well as with the addition of ethanol, used as a co-solvent, to supercritical carbon dioxide in a ratio of 5% to the total consumption at a temperature of 313 K and pressure 30 MPa. METHODS. The study of extraction processes was carried out by the method of supercritical fluid extraction, which is effective and environmentally friendly compared to traditional methods for obtaining extracts. The experimental setup, equipped with two plunger pumps, allowed the implementation of a dynamic extraction method with both supercritical carbon dioxide and carbon dioxide with the addition of ethanol. RESULTS. The final extract yields were obtained for Valeriána officinális, Hypericum, Matricaria and Salvia at a temperature of 313 K and a pressure of 30 MPa using pure carbon dioxide and a carbon dioxide/ethanol mixture as a solvent. Based on the results of experimental data, the dependence of the mass yield of the extract on the extraction time was plotted. This determines the extraction rate of each sample. CONCLUSION. The experimental data obtained indicate that for each of the samples of plant raw materials, the use of supercritical carbon dioxide modified with ethanol in a ratio of 95 and 5%, respectively, leads to an increase in the yield of the extract. This, in turn, leads to a reduction in energy costs when implementing the extraction process using the proposed method on an industrial scale.

RELEVANCE. Managing the surplus and deficit of electric power generation, which contributes to the stabilization of the energy system and enhances its reliability, is a pressing issue. One of the solutions is the development and implementation of thermal energy storage systems within distributed energy systems. An important task in their development is creating an effective insulation system. THE PURPOSE. To develop an algorithm for the effective design of insulation systems for thermal energy storages with high-temperature working bodies. METHODS. The research is carried out using theoretical methods, including thermal engineering calculation of thermal insulation layers and thermal conductivity analysis. Mathematical modeling methods were used to determine the thickness of the thermal insulation system of a thermal energy storage device. RESULTS. The design of a thermal energy storage device has been developed. Based on the developed algorithm, it was determined that the thickness of the thermal insulation system should be 151 mm (the thickness of the first thermal insulation circuit is 135 mm, the thickness of the second thermal insulation layer made of mineral wool is 16 mm), ensuring minimal heat loss at a temperature of the heat accumulator equal to 2000 °C. It was revealed that the radiant heat flux prevails in the layers closest to graphite, accounting for about 70% of the total flux. CONCLUSION. The study confirmed the effectiveness of the proposed multi-layer insulation system for thermal energy storage. The developed algorithm allows for the calculation of insulation systems of thermal energy storage, taking into account various parameters and operating conditions.

RELEVANCE. This paper presents the research of physical and chemical characteristics of combined fuel briquettes consisting of solid wood waste and laminated paper production waste obtained by innovative technology. THE GOAL of the research is to develop a technology for processing and utilization of pulp and paper industry waste containing synthetic polymers by their joint use in the form of combined fuel briquettes of the 2nd generation, consisting of solid wood waste and laminated paper production waste, with subsequent utilization in a boiler plant with a low-temperature vortex furnace. Minimizing harm to the environmental component and maximizing energy and economic efficiency. METHODS. To realize the set goal, the following research methods were used in the work: study of thermoplasticity of synthetic polymers and moisture plasticity of polymeric components of wood in the process of briquette formation, determination empirically of the optimal composition of the combined briquette to obtain high calorific value of fuel, low concentration of harmful emissions, high strength and density of the finished product, determination of the lower heat of combustion of the obtained briquette with the help of calorimetric installation. RESULTS. The paper presents the results of the conducted research and experiments, in particular, the obtained values of density, strength and calorific value of the obtained briquette at different compositions of feedstock. CONCLUSION. The fuel briquettes obtained in the course of work have high indicators of density, strength and calorific value of fuel. In addition, the innovative technology of processing wood waste and waste packaging laminated paper will minimize the harm to the environmental component and increase the maximum energy and economic efficiency. The use of the obtained fuel and the technology of its production will make it possible to reduce the load on landfills with currently unutilized waste and use the obtained fuel energy for own needs.

RELEVANCE. The relevance of this work lies in the creation of a certified software package (SEC), which is focused on solving problems of interest to the thermal power industry. One of the tasks chosen by the authors is devoted to improving the efficiency of the well-known gas turbine cycle by modernizing the thermal power circuit, which refers to a gas turbine plant (GTP). It should be noted that for CHP and GTP, the problem of increasing/improving energy criteria (Z1 - electrical efficiency, Z2-thermal efficiency, etc.) is a priority. The article considers in detail a number of objects, among them there are: a) the domestic mathematical package (MP) SMath, b) the package of functions (PF) WaterSteamPro, c) websites, d) the computer environment (CS) Linux. When creating the SEC, the authors solved issues those are relevant, firstly, for generating plants, including thermal power plants and combined cycle gas plants (CCGP); secondly, the authors considered the problems that play an important role in the modernization of the GTP, which includes a recovery boiler. Purposes. The authors consider several goals. The first is related to the development of method I, which should ensure the optimization of criteria characterizing the PGU-1 power plant under study. This technique is based, in particular, on Information Technology (IT); it uses a number of open interactive (OS) algorithms. These algorithms allow the researcher to conduct thermal energy (TE) calculations aimed at determining energy criteria, Z = (Z1, Z2, ...). Based on method I, the PROBLEM (A) is solved, which is related to the search for optimal parameters, Yopt= (Y1, Y2, ...), characterizing the thermodynamic cycle of PGU-1, here Y1 is the temperature at the inlet to the compressor, Y2 is the pressure at the inlet to the gas turbine. The second goal is related to the creation of a "Multifactor technology for the formation of OS algorithms." This technology makes it possible for a researcher who performs TE calculations to attract such tools that correspond to the world level of IT (SMath MP, Linux MP, Mathcad Calculation Server tool, etc.). In accordance with the second goal, a number of TASKS are being solved; among them is a task aimed at the SEC complex, as well as the task of creating an OS algorithm for TE calculations that are focused on PSU and MP Linux. Results. The article describes, firstly, the SEC complex. Secondly, the TE calculations were performed in accordance with the tasks set. So, in task (A), the PGU-1 is analyzed, which contains a number of blocks (a steam turbine; a part aimed at the internal heating of a vocational school, a heat recovery boiler, etc.). As a result, numerical data and graphical illustrations were obtained, including an assessment of the criterion Z2= 48.68% for the vocational training unit under Yopt conditions and a thermal power scheme for PGU-1 was selected. Conclusions. Currently, for well-known reasons, domestic researchers are switching from foreign software to domestic developments. An analysis of the results obtained in these TE calculations allows us to conclude: SMath MP and the SEC complex have enabled researchers to successfully abandon software that relies on Mathcad MP, Maple MP, Mathematica MP and MATLAB MP.

RELEVANCE The article is devoted to the development of new designs of heat exchangers and evaluating the efficiency of their operation. According to the authors, currently of particular interest are conical heat exchangers of the "pipe-in-pipe" type, so the object of research in this paper is a heat exchanger in the form of a truncated cone based on a spring-twisted channel. The introduction of the proposed heat exchange elements and apparatuses into the industry requires additional research.  To assess the effectiveness of the application of the considered TA, it is proposed to evaluate its performance in comparison with conical and cylindrical TA based on a smooth-walled pipe. Due to this, two hypotheses will be tested at once: the use of a conical coil heat exchanger is more efficient than a cylindrical one, and the replacement of a smooth-walled pipe with a spring-twisted channel increases the efficiency of the heat exchanger.OBJECT.  The aim of the research is to develop a method for setting and solving the conjugate heat exchange problem for a heat exchanger in the form of a truncated cone with a heat exchange element in the form of a spring-twisted channel, analyze the results obtained and evaluate the efficiency in comparison with conical and cylindrical heat exchangers based on smooth-walled heat exchange elements. METHODS. For the numerical solution of the conjugate heat transfer problem, the FEM implemented by means of Ansys was used Fluent. RESULTS. The main results consist in the fact that the authors developed a model and algorithm for calculating conical coil heat exchangers of the pipe-in-pipe type, implemented in the Ansys program, and determined the thermal and hydrodynamic parameters of coil devices. A comparison of coil heat exchangers was also made: a conical one based on a spring-twisted channel with a conical one and a cylindrical one with a smooth-walled heat exchange element. The calculation results showed that replacing a smooth-walled pipe with a spring-wound channel significantly increases the efficiency of heat exchange equipment. CONCLUSION. The significance of the obtained results lies in the possibility of using modern, more efficient and compact heat exchange equipment for technological needs and in the justification of this choice. Thus, with equal initial data, conical heat exchangers are more efficient than cylindrical ones with a heat exchange element in the form of a smooth tube, since they need a smaller heat exchange surface to achieve the necessary thermal and hydrodynamic parameters. The results of calculations prove the prospects of using a conical TA based on a spring-twisted channel and show the need for further study of the influence of the geometric characteristics of both the coil itself and the heat exchange element on the thermal and hydrodynamic characteristics of the proposed HE.