Heat Resources Research Articles

Comparative analysis and optimization of waste-heat recovery systems with large-temperature-gradient heat transfer

Efficient utilization of waste heat is crucial for reducing waste heat emissions and minimizing environmental impact. Organic Rankine cycle (ORC) systems are commonly employed for waste heat recovery. However, conventional ORC systems have limitations in effectively harnessing waste heat resources because of differences in the pinch point temperature and the relatively small temperature difference between the heat source inlet and outlet. To address this issue, we designed two absorption organic Rankine cycle (AORC) systems in this study based on absorption heat exchangers. We analyzed the energy, exergy, and economy of three ORC system models with heat source temperatures within the range from 363.15 K to 413.15 K. The results indicated that the AORC system represented a optimal waste heat recovery system, capable of reducing the outlet temperature to 298.70 K and achieving a high temperature efficiency of 1.037. Thus, an AORC system can facilitate heat exchange with substantial temperature differences, enabling the efficient utilization of heat sources. The AORC system in this study exhibited a high net power of up to 151.8 kW, and an electrical exergy efficiency of 55.45%. Additionally, the AORC consistently outperformed other systems in terms of economy, as evidenced by its electricity production cost, which was the lowest among all three systems with heat source temperatures lower than 398.15 K.

A decision support system for green and economical individual heating resource planning

The heat sector accounts for almost half of the world’s energy consumption, making it a crucial component in meeting decarbonization targets. One of the biggest challenges of heat energy decarbonization arises at the household level, which collectively has a substantial impact on decarbonization. Individual households commonly rely on decentralized heat sources (DHS). Different technologies can be used as a DHS, each of which leads to different overall (Capex and Opex) costs and carbon emissions. Households choose their DHS technologies freely, though typically influenced by the recommendations from their local city planners who use historical data and analyze the respective economical and environmental consequences. Therefore, developing a decision support system (DSS) that guides individuals in their DHS investment choices is a high priority for city planners as it can help evaluate the role of different policies in aligning economical and environmental concerns. This is becoming more important as both the economical and environmental concerns are increasing, respectively, due to recent energy price spikes and the growing urgency of decarbonization. However, developing such a comprehensive DSS is challenging due to the complexity of accounting for all DHS constraints and the uncertainties in demand, prices, and policies. In this study, we present a reliable and comprehensive DSS that provides a range of optimal strategies including the most cost-efficient and the most environmentally friendly ones. These strategies identify the optimal type, installed capacity, and year of investment of DHS technologies, as well as the expected yearly heat generation of each technology. Our DSS accounts for the uncertainties of heat demand, fuel prices, investment, and operation and maintenance costs. We apply our DSS to a typical household in the municipality of Lyngby-Taarbæk under different policy scenarios. We show that between the most environmentally friendly and most cost-efficient solution only a gap of 9%–15% in cost needs to be bridged. We also demonstrate that current energy taxation policies in Denmark do not provide a level playing field between different heat technologies. Under different policy scenarios, we show that heat pumps integrated with PV have the highest potential for minimizing CO2 emissions for a Danish household.

Optimization of biomass energy coupled multi-source heat pumps cooperative heating system: A case study

ABSTRACT To achieve the goal of clean heating in northern rural areas, a cooperative heating system, composed of a biomass boiler and a multi-source heat pump was proposed, based on building heat load and resource conditions. This cooperative heating system combined biomass energy, geothermal energy and air energy. A dynamic simulation model is established by using the TRNSYS software. Under the condition of energy balance, an optimization model is proposed based on the minimum annual cost. The proposed model is applied in a demonstration project for the Miaofuan rural community in Linzi Town, Linyi County, Dezhou City in Shandong Province, China. The heat supply ratio of each equipment and the operation mode of the coupled system are optimized. Results show that the coupled system with the optimal configuration can reduce the annual cost by 9.60%, 14.22% and 11.66%, respectively; compared with the geothermal heat pump, air source heat pump and biomass boiler alone. Therefore, the proposed cooperative heating system can be well applied in rural areas.

Comparative assessment of heat recovery from treated wastewater in the district heating systems of the three capitals of the Baltic countries

Urban cities have a great potential for the sewage wastewater (WW) and treated WW but this heat resource is still underutilised in many European cities, including the three Baltic capitals of Tallinn, Riga, and Vilnius. The aim of this paper was to evaluate the integration of waste heat (WH) into a district heating (DH) system via absorption heat pumps by using key performance indicators (KPIs) in the fields of energy, environment, economy and social sphere in the three Baltic capitals. The paper presents a three-step methodology that develops an innovative multi-dimensional approach to energy poverty analysis and includes the three main drivers of energy poverty: fuel prices, household income, and energy efficiency. The paper shows that the integration of WH is economically feasible from the consumer's point of view and reduces energy poverty, especially when the price of fuel increases.

Early-maturing varieties of open-ground tomato of domestic breeding in the conditions of the Tersko-Sulak subprovincion of Dagestan

Relevance. Dagestan is a zone of prosperous agriculture, distinguished by the abundance of heat, sun and irrigation in the plain zone. Tomatoes occupy a special place among vegetable crops in the world, including in the Republic of Dagestan. Determinant varieties are now the most common in the production of tomatoes, especially in the open ground. The main areas of specialized cultivation of tomatoes in the open ground are concentrated in the Kizlyar and Derbent districts of plain Dagestan. In these areas, there are high average daily temperatures for the formation and ripening of tomato fruits in excess, which is favorably reflected in the overall productivity of the bushes. Whereas in the foothills of Dagestan, insufficient heat resources do not allow growing tomato varieties with a long growing season. In the foothill part of the republic there is a large labor-resource potential, vegetable growing, as a labor-intensive type of agribusiness, acts as a sphere of employment for a significant part of the rural population. The demand for tomato varieties with a short growing season in this part of the republic is great.Methods. The research was carried out on the basis of the Tersko Sulak subprovincion of the FGBNU of the FANC RD of the Kizlyar district. The soil of the experimental site is alluvial-meadow, medium-saline, medium loamy in mechanical composition. Agrotechnics is generally accepted in the Republic of Dagestan for tomato culture.Results. The method for the study was the new semi-stamp cultivars of FGBNU FNCO (VNIISSOK) selection: Fakel (counter), Blagodatny, Viking, Voskhod VNIISSOKa, Magnat, Severyanka, Sodruzhestvo, Perst, Patrice. According to the maturation dates, the samples were divided into three groups: very early – Severyanka, Blagodatny, Magnat, Voskhod VNIISSOK (97-100 days); early – Patrice, Viking, Perst (102-105 days); middle-early – Sodruzhestvo, Fakel (111-114 days). According to the type of bush, we have identified 5 ordinary and semi-lamb samples with a height of no more than 78 cm. Two samples had a height of 50-53 cm (Patrice, Perst) and an average fetal weight of 72 and 60 g. Three samples had a height of 70, 71, 72 cm (Voskhod VNIISSOKa, Blagodatny, Sodruzhestvo) and an average fetal weight of 107, 110, 130 g. According to the output of gross output, the best indicators were of the following varieties: Blagodatny – 86.3; Voskhod VNIISSOKa – 82.7; Sodruzhestvo – 77.6 t/ha; Patrice – 68.2 t/ha. The following grades had a high yield of marketable products: Voskhod VNIISSOKa, Patrice – 92%; Blagodatny – 91%; Perst – 90%. The varieties also have a relatively high dry matter index of 5.3-6.4%.

Study on heat transfer performance using ceramic membrane to recover moisture and waste heat from flue gas

The release of industrial flue gas into the environment leads to a significant waste of latent heat and water resources. To address this issue, the transmission membrane condenser (TMC) has emerged as a promising technology. However, research on TMC is still in its early stages, lacking performance evaluation of heat exchangers and analysis of heat and mass coupling effects. This paper presents experiments conducted to assess the heat transfer performance of TMC at different undercooling degrees and flue gas velocities. A comparison between TMC and 316L stainless steel pipe is made to identify the impact factors of heat and mass coupling effects in TMC. The study also derives a Nusselt formula suitable for single-channel ceramic membranes, providing theoretical guidance for their application.

Influence of B2O3 on the thermophysical properties of molten blast furnace slag

The thermophysical characteristics of blast furnace molten slags have crucial implications for their smelting process and the subsequent utilization of resources. To efficiently recover molten slag waste heat resources, the thermodynamic properties and viscous flow characteristics of molten blast furnace slag systems with various B2O3 contents were investigated. The stability of the slag at high temperatures was evaluated by calculating its heat capacity and critical heat release. The structural evolution of the melt under varying B2O3 contents was comprehensively studied using Raman spectroscopy and Nuclear Magnetic Resonance. From the perspective of viscous flow characteristics, the impact of B2O3 resulted in a reduction in viscosity of the slag, while the electrical conductivity of the slag increased. Concerning the thermodynamic properties, the break temperature decreased from 1377 °C to 1280 °C with an increase in B2O3 content in the range of 0 to 6 wt.%, while heat capacity and critical heat release of the slag both increased. The introduction of B2O3 facilitated smoother the blast furnace smelting conditions while enhancing the superiority of the granulated product and the efficiency of heat recovery. Adding B2O3 to the molten slag disrupted part of chain structure (Si-O-Si) to create a more flowable cyclic borosilicate structure (Si-O-B).

Rapid detection of live bacteria in water using nylon filter membrane-integrated centrifugal microfluidics

Water is one of the most indispensable elements for human beings. People can live without food for a couple of weeks but cannot live without water for a couple of days. Unfortunately, drinking water is not always safe around the world; in many areas, the water for drinking could be contaminated with various microbes. However, the total viable microbe count in water still relies on culture-based methods in laboratories. Therefore, in this work, we report a novel, simple, and highly efficient strategy to detect live bacteria in water via a nylon membrane-integrated centrifugal microfluidic device. A handheld fan and a rechargeable hand warmer were utilized as the centrifugal rotor and the heat resource for reactions, respectively. The bacteria in water can be rapidly concentrated >500-fold by our centrifugation system. After incubation with water-soluble tetrazolium-8 (WST-8), the color change of the nylon membranes can be visually interpreted directly by the naked eye or recorded with a smartphone camera. The whole process can be finished in 3 h, and the detection limit can reach 102 CFU/mL. The detection range ranges from 102 CFU/mL to 105 CFU/mL. The cell counting results of our platform are highly positively correlated with the results of cell counting by the conventional lysogeny broth (LB) agar plate approach or the commercial 3 M Petrifilm™ cell counting plate. Our platform provides a convenient and sensitive strategy for rapid monitoring. We highly anticipate that this platform can improve water quality monitoring in resource-poor countries in the near future.

The impact of clustering strategies to site integrated community energy and harvesting systems on electrical demand and regional GHG reductions

The current work examines the Integrated Community Energy and Harvesting system (ICE-Harvest), an integration of thermal and electrical distributed energy resources. The system prioritizes the harvesting of community waste energy resources—for example, residual heat rejected from cooling processes and peak electricity fossil-fuel fired generators, as well as energy from curtailed clean grid electricity resources—to help in satisfying the heating demands of commercial and residential buildings. As such, ICE-Harvest systems provide a solution that can minimize greenhouse gas emissions from high-energy-consumption buildings in cold-climate regions such as North America and Northern Europe. The current work focuses on where to locate these systems and introduces different clustering methods for integrated energy systems that focus on thermal load diversity among buildings in each cluster. In the first technique, buildings with the highest amount of rejected heat from their cooling systems (anchor buildings) are clustered with nearby high heating demands buildings to create a large opportunity for harvesting wasted energy however, buildings not located close to anchor buildings are clustered using density-based clustering methods. The energy harvesting capabilities of this technique are compared to those provided by full DB clustering without specifying the anchor buildings, as well as to full density-based clustering with a post-processing step in which the nearest anchor building is added to each cluster. The selected clustering method also demonstrates the grid level potential of the ICE-Harvest systems to impact greenhouse gas emissions, heating, and electricity consumption by presenting a reduced model for the ICE-Harvest system that can be applied to any number of clusters on a municipal or provincial/state scale. Specifically, the model is applied to a database of 14,832 high-energy-consumption buildings with the potential for forming 1,139 clusters in the province of Ontario, Canada. The results of this case study reveal that density-based clustering with post processing resulted in the largest emission reduction per unit piping network length of 360 t CO2eq /km/year. In addition, the use of ICE-Harvest systems can displace the energy required from the gas-fired heating resources by 11 TWh, accounting for over 70% of the clusters’ total heating requirements. This results in a 1.9 Mt CO2eq reduction in overall sites’ emissions, which represents around 60% of the clusters’ emissions.

High-temperature green hydrogen production: A innovative– application of SOEC coupled with AEC through sCO2 HP

This study evaluates a potential coupling between AEC and SOEC through a CO2 heat pump unit that works in super-critical conditions. In such a way, thermal power requested by SOEC can be provided by recovering heat loss from AEC via the CO2heat pump. The coupled configuration is characterized by renewable electric input. Hence, the power is provided for electrolysis without more external thermal resources. The energy, economic and environmental impacts of such intervention have been determined and compared with SOEC in solo mode. The layout is created and simulated in a MATLAB SIMULINK environment.The simulation results show a potential improvement in the total energy efficiency of the whole system without an external heat resource, up to 68%, which is higher than 65% of SOEC itself, thanks to the heat recovery section that is correlated with sCO2 HP contribution. LCOH varies widely depending on SOEC size from around 2.59 €/kgH2 up to 9.27€/kgH2.

Investigation and development of improved methods for the design of ejector

The ejector is a simple mechanical device having no moving parts has the characteristics of being fixed, reliable, inexpensive, simple to keep up and handle. An ejector is a device that allows a fluid at low pressure flow (secondary fluid flow) by speed up some other fluid at high pressure flow (primary fluid flow) through nozzle. It is used in lot of industrial processes, particularly with air or steam as operating fluid. The ejector system has a vast range of applications. They reduce pollution compared to fossil fuel power plants. The geometry of the ejector has a remarkable impact on the performance of the ejector. A steam ejector can effectively make use of unused heat resources, which is mainly used in air conditioning, refrigeration, and seawater desalination sectors. The geometry of mixing chamber of the steam ejector features a critical effect on its outcome. The numerical simulation results shows that the entrainment ratio and critical back pressure of the steam ejector initially increases and then decreases with the increase in mixing chamber length for different mach numbers. Mixing chamber length of 40 mm to 80 mm and nozzle throat diameter 2.5 mm provides high performance of steam ejector for steam ejector refrigeration.Ejector with converging-area chamber has higher performance than ejector with constant area section. Hydrocarbon ejector cooling applications is highly recommended.

RESEARCH OF COMPUTATIONAL MATHEMATICAL MODELS FOR TECHNICAL SYSTEMS

In the theory of analysis and synthesis of technical systems, mathematical modelling and optimization of multilayer systems containing sources of physical fields occupy an important place. This is due to the fact that their state is described by means of boundary value problems with multidimensional differential equations. To solve the boundary value problems and implement the process of optimizing the technical parameters of the modelled systems, it is necessary to conduct interdisciplinary studies of computational and applied optimization mathematical models. Fulfilment of the conditions for the existence of a single solution to boundary value problems by default is possible only when the object of study is a single-layer material under the action of load sources. If it is necessary to calculate and optimize the technical parameters of a multilayer material subjected to load sources, then it is impossible to immediately guarantee the correctness of the calculated and applied optimization mathematical models, since it is necessary to obtain the conditions for the existence and uniqueness of solutions to boundary value problems with systems of differential equations. Maximizing the technical parameters of load sources and averaging the characteristics of material layers will lead to approximate values of the objective function and technical parameters of the modelled system, which leads to irrational consumption of energy and heat resources and uncontrolled losses, and useless losses of the test material in the technological process. The article presents the conditions for the correctness of multipoint boundary value problems with multidimensional differential equations describing the state of a multilayer material under thermal action. It is advisable to use these studies to substantiate the correctness of other technical and biotechnological systems, which will increase the accuracy of the implementation of applied optimization problems of economic and mathematical modelling.

Model-based insights into aerosol perturbation on pristine continental convective precipitation

Abstract. The Tibetan Plateau (TP) is of great importance for weather and climate due to its role as a heat and water resource. Relatively clean aerosol conditions over the Plateau make the study on the aerosol–cloud–precipitation interactions in this pristine continental region distinctive. In order to investigate the impacts of aerosols on small-scale convection processes over the TP, a convective event with precipitation observed on 24 July 2014 in Naqu was selected to explore the influence of aerosols on the onset and intensity of precipitation. We use the Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA-2) reanalysis to derive the cloud condensation nuclei (CCN) number concentration, which can be regarded as the real-time background. These values are adopted to initialize the regional Weather Research Forecast (WRF) 4.0 meteorological model and to simulate the onset of convective events and the formation of precipitation. Four sets of experiments, named clean (1/10 CCN), control (default setting), Tibetan Plateau (CCN calculated from MERRA-2 reanalysis), and polluted (10 times CCN), were adopted for our simulations. A detailed analysis of the microphysical processes shows that the conversion of cloud water into rain is enhanced by small increases in aerosol concentration, while it is suppressed by larger increases in concentration. However, the transformation of cloud water to graupel and the development of convective clouds are favored under a polluted situation. As a result, the onset of the precipitation is delayed and cold-rain intensity increases.

Ignition control and waste heat assessment of spontaneous combustion gangue hill by gravity heat pipe group: a case study in Shanxi Province, China.

Spontaneous combustion gangue hill has attracted great attention due to serious environmental pollution and terrible geological disasters. However, the rich thermal resources inside are often ignored. In order to control the spontaneous combustion of gangue hill and utilize the internal waste heat resources, this project studied the combined treatment effect of 821 gravity heat pipes, laid 47 sets of temperature monitoring devices, evaluated the storage of waste heat resources, and proposed different waste heat utilization methods. The results show that (1) the positions of spontaneous combustion are all located on the windward slope. The highest temperature is in the range of 6 ~ 12m underground, exceeding 700 ℃. (2) The single-tube experiment of gravity heat pipe shows that the effective temperature control radius is 2m. The cooling effect is obvious in the range of 3 ~ 5m underground. However, the temperature rises at the depth of 1m underground. (3) After 90days of treatment of the gravity heat pipe group, the temperature at the depths of 3m, 4m, 5m, and 6m in the high-temperature zone dropped by 56 ℃, 66 ℃, 63 ℃, and 42 ℃, respectively. The maximum temperature drop exceeds 160 ℃. The average temperature drop in the middle- and low-temperature areas is between 9 and 21°C. (4) The concentration of harmful gases (CO, SO2, and H2S) decreases by more than 90%. The hazard level is greatly reduced. (5) The amount of waste heat resources contained within 10m of the spontaneous combustion gangue hill is 7.83E13J. Waste heat resources can be used for indoor heating and greenhouse cultivation. And, under the temperature difference of 50°C, 100°C, and 150°C, the electric energy generated by the heat through the thermoelectric conversion device in the high-temperature zone of the gangue hill is 4056.8 kWh, 7468.2 kWh, and 10,603 kWh, respectively.

The impact of energy shortages on health and healthcare in Europe.

The impact of energy shortages on health and healthcare in Europe.

Process and Heat Resources for Wire Arc Additive Manufacturing of Aluminium Alloy ER4043: A Review

The application of wire arc additive manufacturing (WAAM) in manufacturing has raised interest among researchers. In this paper, the introduction of additive manufacturing and wire arc additive manufacturing, various heat resources for WAAM, aluminium alloys, aluminium alloys ER4043, and performance evaluation of WAAM of ER4043 have been discussed in detail based on bead geometry, microstructure, microhardness, and tensile properties as well as the building path strategies, problems, and future directions. Based on this review, aluminium alloy 4043 (ER4043) is an Al-Si alloy frequently employed as a filler wire because it has superior fluidity and significantly fewer flaws in additively built structures. Next, dwell time and cooling efficiency during the WAAM process significantly affect bead geometry. Besides, a finer microstructure can be obtained with a better cooling rate. However, a coarser microstructure is obtained along with the increased deposition height due to heat accumulation and low solidification rate. Heat input is identified as the main cause of porosity, and CMT with a lower heat input is preferable and outperformed GTAW and GMAW in terms of mechanical properties.

FEATURES OF THE MANIFESTATION OF BIOMETRIC INDICATORS IN VARIETIES AND BREEDING LINES OF BREAD WINTER WHEAT ON THE AUTUMN VEGETATION DORMANCY ONSET DATE IN THE FOREST-STEPPE OF UKRAINE

FEATURES OF THE MANIFESTATION OF BIOMETRIC INDICATORS IN VARIETIES AND BREEDING LINES OF BREAD WINTER WHEAT ON THE AUTUMN VEGETATION DORMANCY ONSET DATE IN THE FOREST-STEPPE OF UKRAINE

Techno-Economic Comparison of Solar and Geothermal Energy-based Systems: A Case Study in Western Sichuan

The application of renewable energy can effectively alleviate energy shortages and environmental pollution. However, electric heating and traditional combustion heating are still widely used in western Sichuan. This paper analyzes a techno-economic comparison between a solar-air energy heating system (System 1) and a geothermal-air energy heating system (System 2) designed for Litang. First, the distribution of renewable energy in Litang is analyzed. The system devices and operating modes of the two systems are described. According to the system design results, the paper compares the initial cost, operation cost, and net present value (NPV) of the two systems. The results show that both schemes are feasible from the perspective of technical analysis. While System 2 has lower initial investment, operation cost and higher NPV, which meets the actual needs of the project and local development planning. Using geothermal resources for urban central heating can achieve good energy saving and emission reduction benefits, and provide a reference for improving the proportion of local renewable energy use and optimizing the energy structure.

Variation characteristics of climatic potential yield and resources utilization efficiency of maize under the background of climate change in agro-pastoral transitional zone of Gansu, China.

To evaluate the effects of changes in radiation, accumulative temperature, precipitation and climate resources on climate resource utilization efficiency in the agro-pastoral transitional zone of Gansu Province, we analyzed the variations of climate potential yield loss rate, light, heat, precipitation and comprehensive utilization efficiency of climate resources in the agro-pastoral transitional zone of Gansu Province by the step-by-step correction and indexation method, with the 1971-2020 weather data from 45 meteorological sites and the maize phenology data. The results showed that solar radiation showed fluctuating downward trend at a rate of -22.03 MJ·m-2·(10 a)-1, the accumulative ≥11 ℃ temperature showed significant upward trend at a rate of 60.89 ℃·(10 a)-1, the precipitation showed slow upward trend at a rate of 2.05 mm·(10 a)-1 during the study period. The climate potential yield loss rate due to temperature and precipitation limitations was relatively high in Gannan and the northern part of Longzhong, while it was relatively low in the most areas of Longdong. Except for the central part of the study area and part of Longdong, the climate potential yield loss rate due to temperature and precipitation limitations in other regions of the study area showed decreased trend at the rate of -2.0%·(10 a)-1 and -0.6%·(10 a)-1. The low-value areas of light and heat utilization efficiency distributed in the northern and southern parts of Longzhong and part of Gannan, the low-value area of precipitation utilization efficiency distributed in Gannan, and the low value of comprehensive utilization efficiency distributed in Lanzhou and Baiyin which were 0.41 and 0.47, respectively. Longdong was the most suitable for maize planting, where the climate resources utilization efficiency of maize was highest, followed by Gannan and Longzhong. The average tendency rate of light, heat, precipitation and climate resources comprehensive utilization efficiency in the study area showed increased trend, which were 0.1%·(10 a)-1, 0.07 kg·hm-2·℃-1·d-1·(10 a)-1, 1.17 kg·hm-2·mm-1·(10 a)-1 and 0.05 ·(10 a)-1, respectively, showing a good potential to increase maize yield.

Исследования микроклиматической неоднородности выпадения атмосферных осадков на отдельно взятом поле

The purpose of the research is to determine the microclimatic heterogeneity of precipitation in a single field during the active vegetation of agricultural plants on the territory of the Field experimental station of the Russian State Agricultural Academy named after C.A. Timiryazev. An assessment of the qualitative influence of local conditions forming the microclimate on the distribution of precipitation within a single field is given. Studies have established uneven moistening of agricultural landscapes by atmospheric precipitation during active vegetation in conditions of limited land use. The greatest influence of the studied microclimate factors was exerted by urban development, the presence of forest belts and the features of the underlying surface. At the same time, an important role in the processes of accumulation of productive moisture belongs to the water-physical properties of the soil, in particular its ability to absorb and retain moisture. To solve the problems of precision farming and create a digital model of a single field, taking into account the microclimatic features of the distribution of light, heat and moisture resources in agrophytocenoses is extremely important in terms of ensuring a safe production process and increasing crop yields. Background standard values of stationary meteorological site data do not fully reflect the dynamics of variability of meteorological elements in individual agricultural fields under the influence of local conditions. Therefore, the study and competent application of knowledge about the microclimatic features of agricultural landscapes in general and of a particular field in particular, is of great practical importance in the production of agricultural products. Scientifically-based placement of crops, site selection, clarification of terms and methods of sowing, terms and methods of tillage are only part of the important role of microclimate accounting. In addition, field crops determine their phytoclimatic differences, the peculiarity of which is the variability of microclimatic parameters during the growing season. This should also be taken into account when assessing the processes of plant growth and development, as well as planning various agrotechnical measures.