Calculation Of Energy Efficiency Research Articles

Assessment of Energy Efficiency for the Existing Cargo Ships

In order to address the decarbonization policy, International Maritime Or-ganization (IMO) has been dealing with energy efficiency of ships for more than a decade. Firstly, procedures for energy efficiency assessment are intro-duced through the regulative, but only for new ships. Consequently, IMO also introduced energy efficiency criterion for already built ships that is set to be applicable starting from 2023. Regulative is already having an impact on ship design. While the new ships can be adapted in design phase, built ones will not have so many options. So far, almost all the solutions include reduction of the speed, i.e., slow steaming. Nevertheless, there are numerous technical and operational measures. The paper presents the calculation of energy efficiency performed for the fleet of existing 11 cargo ships categorized into four differ-ent ship classes. Calculation is based on the current IMO regulations covering the evaluation of energy efficiency of existing ships index (EEXI). Input pa-rameters for analysis are obtained using two approaches: technical files (de-sign parameters of the ship) & sea-trial reports and statistical method (when technical files & sea-trail reports are not available). Authors examined if the difference in two input approaches and potential class notation change could lead to different energy efficiency evaluation results. Moreover, the main goal of the research was to investigate on how the present conventionally de-signed cargo ships compare to the novel regulations.

ОЦІНЮВАННЯ ЕНЕРГОЕФЕКТИВНОСТІ СВІТЛОПРОЗОРИХ ОГОРОДЖУВАЛЬНИХ КОНСТРУКЦІЙ БУДІВЕЛЬ

An analytical review of publications on the energy efficiency of translucent elements (windows, doors) of the enclosing structures of the building. The urgency of developing an expert system that would allow modeling the decision-making process in diagnosing thermal insulation at the stage of operation of the building, and was based on multicriteria analysis of elements of the building's enclosing structures. To develop such a system, the factors influencing the energy efficiency of translucent structures are analyzed. Influence factors are grouped into three blocks - technical, technological and operational. The paper analyzes a detailed analysis of each group of factors and identifies their design features, quantitative and qualitative characteristics that affect the increase in energy efficiency. The results of automated calculation of energy efficiency of windows in the program "Energy calculator of windows and doors OKNA.ua", which takes into account the quantitative characteristics of windows. The possibility of using this automated service of calculation of windows at technical inspection of the existing building and diagnosing energy efficiency of a heat-insulating cover of the building is analyzed in the work.

Analysis and calculation of energy efficiency of radio beacons Internet of Things (IoT)

The paper examines one of the most relevant trends in the development of information technology Internet of Things (IoT). The analysis and calculation of the energy efficiency of the IOT solutions sensors are carried out. The key characteristics of assessing the durability of the sensors are investigated.

The calculation algorithm of oil and gas production enterprise energy efficiency indicators

THE PURPOSE. The main purpose of the study is to develop the calculation algorithm of energy efficiency indicators. To develop an algorithm, it is necessary to consider the features of the power supply system of the oil and gas production enterprise. Then, the power and electricity balance calculation algorithm should be designed to evaluate the share of the technological processes’ consumption, analyze losses, and determine the source of imbalance. The assessment of energy efficiency indicators will require adaptation of the parameter’s identification method for rotating electrical machines in operating modes. To calculate the specific equipment energy, it is necessary to use power tracing in the algorithm. The final stage is to develop a visualization of a software prototype for monitoring and control energy efficiency indicators of an oil and gas production enterprise.METHODS. The equipment parameters identification method based on actual measurements is used for designing a mathematical model. To calculate the steady-state, the nodal-voltage method is used in couple with an addressing matrix for tracing power flows.RESULTS. The paper proposes an algorithm for calculating energy efficiency indicators of equipment for an oil and gas production enterprise. The algorithm is based on the processing and analysis of actual data from the electricity metering devices installed at the enterprise. Analysis of the power consumption information together with the oil production indicators will reveal the most efficient operating mode of the equipment. The calculating algorithm for the specific electricity consumption is considered in the example of a typical hierarchy of metering devices at a field. Further, the paper discusses the possibility of applying the targeting flow distribution principle for reducing power losses. A parameters identification technique is presented for multi equipment nodes to assess energy efficiency and monitor operating parameters.CONCLUSION. The algorithm considered in the paper was introduced into the information system of the production control center at the field as an additional module for assessing energy efficiency. The large deviation of the indicator's values from the specified ones is messaging about the equipment's normal mode violations. It allows creating an optimal schedule of organizational and technical measures to regulate energy consumption and improve the energy efficiency of the enterprise.

How Does the Carbon Tax Influence the Energy and Carbon Performance of China’s Mining Industry?

As the world’s largest energy consumer, China’s CO2 emissions have significantly risen, owing to its rapid economic growth. Hence, levying a carbon tax has become essential in accelerating China’s carbon neutralization process. This paper employs the two-stage translog cost function to calculate the price elasticity of the mining industry’s energy and input factors. Based on the price elasticity, the carbon tax’s influence on the mining industry’s energy and carbon performance is estimated. In the calculation of energy efficiency, the non-radial directional distance function is adopted. The results express that the carbon tax significantly decreases the mining industry’s CO2 emissions and promotes its energy and carbon performance. In addition to levying a carbon tax, the government should also strengthen the market-oriented reform of the oil and power infrastructure to optimize the mining industry’s energy structure.

Electroreduction recovery of gold, platinum and palladium and electrooxidation removal of cyanide using a bioelectrochemical system

Electroreduction and electrodeposition recovery of Au, Pt, and Pd was performed in the novel bioelectrochemical system (BES) with carbon electrode. Total voltametric charge of carbon brush reached 0.180 C cm−2. Lower electrochemical porosity confirmed that the active sites of carbon brush were more present on the surface of electrode, and charge transfer resistance and the resistance of the biofilm of carbon brush was only 5.2 Ω/1.5 Ω. Electroreduction products of metals were confirmed by scanning electron microscope, X-ray photoelectron spectroscopy, and X-ray diffractometer. Calculated energy efficiency of the Au, Pt, and Pd reached 2.22 kWh kg−1, 4.45 kWh kg−1 and 2.27 kWh kg−1, the maximum power density 1.16 W m−2. The engineering application potential of the BES and electrolytic cell was explored for the treatment of cyanide tailings leaching solution, realizing the electroreduction recovery of Au/Pt/Pd and the electrooxidation removal of cyanide by self-generated chlorine simultaneously (CN− removal efficiency 100%).

A 20-Gb/s Jitter-Tolerance-Enhanced Digital CDR With One-Tap DFE

A digital clock/data recovery (CDR) circuit with a one-tap speculative decision feedback equalizer (DFE) and a calibration circuit is presented. This CDR circuit is fabricated in 40-nm CMOS technology and its active area is 0.1 mm2. For a channel loss of -10.31dB at 10GHz and a 20Gb/s PRBS of 27-1, the measured bit error rate is less than 10-12. By the proposed calibration circuit, the measured high-frequency jitter tolerance is improved. The measured convergence time of the calibration circuit is less than 5μs. The power of this CDR circuit is 55.4mW at 20 Gb/s, and the calculated energy efficiency is 2.77pJ/b.

A Wide-Range FD for Referenceless Baud-Rate CDR Circuits

A wide-range frequency detector (FD) is presented for baud-rate clock and data recovery (CDR) circuits. It achieves a wide frequency capture range, a short lock time, and a low power. By using this FD, a referenceless quarter-rate CDR circuit with a one-tap decision feedback equalizer is fabricated in 40-nm CMOS technology. The active area of this CDR circuit is 0.0999mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and its power is 44mW while the data rate is 16.8Gbps. The calculated energy efficiency of this CDR circuit is 2.62pJ/b.

Сучасні підходи до оцінювання енергоефективності національної економіки

The article notes that energy efficiency cannot simply be a vague and ambiguous concept that does not have accurate assessment methods. It should have clear measurements and evaluation methods. When the question arises as to measuring or evaluating, the lack of a clear definition of energy efficiency can cause the results to differ and it will be difficult to compare them depending on the needs or objectives. So the need to develop an accurate and unified definition of energy efficiency, as well as its classification and development of measurement methods is highlighted. It is emphasized that highly developed countries of the world have significant experience in achieving a high level of energy efficiency of national economies, but they also do not currently have developed a unified system of energy efficiency indicators at the national level, methods for their assessment and analysis. The energy intensity of GDP is almost the only universal instrument by which international and regional comparisons of energy efficiency levels of national economies are possible. It is shown that in recent years in Ukraine there has been a clear tendency to reduce the energy intensity of the national economy in almost all spheres. The State Agency on Energy Efficiency and Energy Saving of Ukraine has developed tables of primary data and a methodology for calculating energy efficiency indicators of the Ukrainian economy. Primary data and calculation indicators are formed by such sectors as industry, transport, housing, agriculture, services. The article shows that recent methods for evaluating energy efficiency based on modeling the efficiency limit, namely, DEA and SFA models, have become a popular tool for evaluating energy efficiency. Despite a number of its advantages, the DEA method does not take into account statistical noise. In contrast to DEA models, SFA models use the Shepard distance function to determine the energy efficiency index and take into account statistical noise.

Characterization of opportunity for upgrading of the system based on arc plasma torch for thermal spaying of ceramic materials, by means of use of fuel vortex intensifier. Part I: Thermodynamic modeling of the system efficiency parameters

One of the main trends in the field of improving the modern technologies of thermal spraying, including plasma one, for functional ceramic coatings formation is the reducing the energy consumption of the process. In this regard, one of the important directions for improving these technologies is the development of their new versions, using the principle of adding inexpensive fuel-oxidizer mixtures based on hydrocarbons with air. This type of plasma-fuel type of spraying will be promising for application at the present time, first of all, in order to obtain refractory functional coatings. For this purpose, we investigated the opportunity for upgrading an industrial unit/system for plasma spraying of ceramic powder materials with arc plasma torch of 25–40 kW power by the use of experimental variant of a fuel gas-vortex intensifier. The thermodynamic assessment of possible parameters of the generated mixed flow after the torch with this fuel intensifier was carried out to estimate the applicability of this system to optimize the spraying of oxide and carbide coatings (based on the examples of Al2O3, Cr3C2 and other powders). The analysis of possible parameters of the produced flow after the torch with intensifier was performed for the cases of main C–H–O–N–Ar–Me (Me = Al, Cr) systems and additional C–H–O–Al-system to assess the potential of this system to modify the technology of oxide and carbide ceramic coatings formation. New regimes, which were analyzed in our research as the simulants of Al2O3 spraying, surpass on calculated energy efficiency characteristics (by 10–20 %) one of the new prospective spraying methods with (СO2+СH4)-plasma, as well as the conventional method of powder heating during the spraying with N2-plasma. The case of our proposed fuel assisted process (FA-APS) with liquefied petroleum gas (LPG) fuel for the heating of ceramic powders (especially, Al2O3) demonstrates the advantage of the process (in particular, on the energy efficiencies and energy consumption) in a comparison with the conventional regimes of APS of the powders (in N2 plasma of the standard torch). For the variants of the FA-APS with Al2O3 and Cr3C2 feedstock powders it was established to be potentially possible to obtain (at the moderate values of total electric energy consumption for the torch and auxiliary equipment, – near 1.8 and 1.0 kWh/(kg of product)) such high level of the process productivity on the final product as approximately 17 and 28 kg/h, respectively; at the values of required power of the torch:  28.2 and  22.3 kW.

Економічна та енергетична оцінка елементів технології вирощування еспарцету на зелений корм

One of the main directions of fodder production intensification is the cultivation of fodder crops and fodder harvesting from them at the lowest cost of energy and labor resources, the maximum yield of fodder products per unit area, and 1 UAH of production costs. To successfully perform this task, it is necessary, first of all, to increase the productivity of forage crops, the use of cost-effective and energy-saving technologies and increase the efficiency of fertilizer application. One of the most valuable perennial legumes is sainfoin, which is characterized by high fodder value, unpretentiousness to growing conditions and has great agronomic value. At the same time, the existing technologies for growing sainfoin for fodder purposes remain energy- and resource intensive. The aim of the research was to determine the influence of mineral fertilizers and seed inoculation on the economic and energy efficiency of the sainfoin growing technology on green fodder. Experimental studies were conducted during 2016-2018 on the research field of the Department of Forage Production, Land Reclamation and Meteorology, located in the NULES of Ukraine "Agronomic Research Station" on typical low-humus chernozem. Experimental research was conducted during 2016-2018 on the research field of the Department of Forage Production, Land Reclamation and Meteorology, located in the NULES of Ukraine "Agronomic Research Station". The scheme of the experiment included the following factors: factor A - varieties of sainfoin: Amethyst Donetskyi, Adam, Smaragd; factor B - fertilizer, inoculation: 1) without fertilizers, 2) N45R60K90 + seeds inoculation, 3) P60K90 + seeds inoculation. As nitrogen fertilizer was used ammonium nitrate 34%, phosphorus - simple superphosphate 19%, potassium - potassium salt 56%. Method of sowing - row, spring, coverless. Inoculation was performed by Rhizotorphin. Economic evaluation of the results of field experiments was carried out in accordance with generally accepted methods developed by the Institute of Cereals NAAS, the Institute of Feed and Agriculture of Podillya NAAS, NSC "Institute of Agrarian Economics" and other research institutions. Calculations of energy efficiency of growing sainfoin for green fodder were calculated according to the "Methodology of bioenergy assessment of technologies for the production of livestock products and feed." According to the economic assessment, the calculations of monetary and material costs are performed taking into account the full mechanization of works. The costs for them are calculated according to the technological maps developed in the process of research. The cost of seeds, fertilizers and fuel was taken at wholesale prices as of January 1. 2019, 1 ton of fodder units of sainfoin was equated to the cost of 1 ton of feed grain. According to the results of research, it was found that when setting up an experiment with different varieties of sainfoin, both with the introduction of mineral fertilizers and without them, the costs were the same. Economic indicators differed significantly at the end of the growing season, as the productivity of different varieties of sainfoin differed significantly not only due to the biological characteristics of varieties, but also as a result of their different reactions to mineral fertilizers. According to the obtained results of the calculation, among the studied varieties of sainfoin the highest conditionally net profit (13354-16504 UAH/ha) and the level of profitability (129-176%), as well as the lowest cost of 1 ton of feed units (1431-1627 UAH per 1 ton) and crude protein (UAH 8393–7291 per 1 ton) were observed on crops of sainfoin Amethyst Donetskyi. In general, the most economically feasible in terms of profitability (176%) was the cultivation of this variety in the absence of fertilizer. The highest indicators of EEC (energy efficiency coefficient) (4.6-6.3) were observed for the cultivation of sainfoin variety Amethyst Donetskyi in the absence of mineral fertilizer or application of phosphorus-potassium fertilizers only.

Historical Transition of a Farming System towards Industrialization: A Danish Agricultural Case Study Comparing Sustainability in the 1840s and 2019

A Danish pre-industrial farming system is reconstructed and compared to its modern industrialized farming system equivalent to evaluate agricultural performance in a sustainability perspective. The investigated Danish farm system and its contributing elements have undergone significant transformations. The intensity of contemporary agriculture shows that high productivity levels have been achieved by increasing the input of energy using modern machinery. At the same time, the energy efficiency (calculations based on energetic indicators) diminishes over time as the degree of dependence on fossil fuels increases. The results from this study show significant changes in the farming system, specifically inputs from agricultural land use, livestock, and energy systems. From being highly circular, the system changed to being a clear linear farming system with highly increased productivity but less efficient at the same time, questioning the relationship between productivity and efficiency and resource utilization in modern farming systems. Through utilizing an agroecological historical approach by comparing system performance over time, the results offer opportunities to explore how agricultural farming systems evolve over time and help to describe the complexity of the system level in a sustainability perspective.

Energy efficiency assessment of power electronic drivers and LED lamps in Li-Fi communication systems

Light-fidelity (Li-Fi) communication systems have gained increased concerns as new and alternative paradigm for wireless communications. Through the increased applications of light emitting diode (LED) lamps for lighting in indoor and outdoor applications, industrial and academic interests have been risen towards adding communication functionality to the standard light emitting diode lamp illumination functionality in light-fidelity systems. As being the same source for lighting and communication, extra power losses and stresses are imposed on the light emitting diode lamp and its power electronic drivers to perform the dual functionalities. Therefore, proper light emitting diode lamp driver design and control systems are required. This paper reviews the different architectures of light-fidelity communication systems and develops a powerful systematic approach for assessing the energy efficiency and the communication system performance metrics for light-fidelity systems. Various light-fidelity structures, communication modulators, power converters, and communication modulation methods are considered based on the mathematical modelling. Simulation results show that energy efficiency and communication system performance are largely affected by system architectures, components, and communication modulators. The obtained results show that the proposed method represents a systematic approach for calculating the energy efficiency and power losses for various elements in light-fidelity systems. Additionally, the calculated energy efficiency with adding the communication functionality is lower than the traditional illumination of the lamps. The type of modulation technique, type of modulator, modulation index value, and forward lamp current have substantial effects on the calculated energy efficiency.

A 10.4–16-Gb/s Reference-Less Baud-Rate Digital CDR With One-Tap DFE Using a Wide-Range FD

A 10.4-16-Gb/s reference-less and baud-rate clock and data recovery (CDR) circuit with a one-tap speculative decision feedback equalizer (DFE) is presented. The quarter-rate CDR circuit uses a pattern-based phase detector (PD) and the proposed FD. This wide-range FD is composed of a coarse FD and a fine FD (FFD) which share the same front-end comparators with the PD and the DFE. Thus, no extra comparators are required. In addition, by monitoring the drift direction of five samples on the five-bit data patterns, the FFD performs an error-free operation within a frequency error of 7.7%. Therefore, the CDR has a robust FD-to-PD transition. By using the proposed FD, this CDR circuit not only achieves a wide frequency capture range of 43%, but also has a short frequency settling time of $680~\mu \text{s}$ . This CDR circuit is fabricated in 40-nm CMOS technology and occupies an active area of 0.1004 mm2. The total power of the receiver is 39.9mW at 16 Gb/s, and the calculated energy efficiency is 2.49pJ/b.

A review of the different boiler efficiency calculation and modeling methodologies

A review of the different mathematical methodologies for calculating energy efficiency in boilers was carried out in this work, considering both the methods included in standards and the proposals and applications published in research works. The classification was delimited in analytical methods, mechanistic modeling, and empirical modeling; moreover, the main equations for each of the methodologies are presented, which allows building a compilation that is expected to be useful for a first approach to the subject. It is displayed that those mechanistic models are used to evaluate subsystems or specific cases that require a high level of detail, while analytical models are used to make a first approximation to the systems described, and empirical models stand out in terms of their use at the industrial level if there is access to a starting database to adjust them.

STUDY INFLUENCE THE DESIGN ОXYGEN LANCE HEAD ON THE RESULTS OF CONVERTER MELTING WITH SCRAP PREHEATING

The results of calculation of energy efficiency of the variant of technology of converter smelting with preliminary heating of scrap metal in the unit due to burning of solid fuels in modern raw material conditions of the metallurgical enterprise of Ukraine are presented. A critical analysis of the variant of converter smelting technology with the use of preheating of an increased amount of scrap metal in the charge containing briquettes of steel chips in the unit, before pouring processing iron. According to the results of the calculation of the efficiency of use of different types of fuel used for preheating of scrap metal in the unit, the rational type and technology of its use in converter smelting are determined. A direct connection between the chemical composition of briquettes, the level of their preheating and the share in the metal charge on the energy efficiency of the converter process and their chemical heat content has been established. The nature of the temperature distribution in the volume of briquettes from steel shavings, which are a part of the metal charge, is taken into account when they are preheated by oxidation of coal with oxygen supplied through the nozzles of the standard lance. A method for calculating the change in energy consumption of scrap metal during its preheating, taking into account the content of elements in the briquettes and the level of heating.&#x0D; The energy consumption of the converter process with preheating of the metal charge increases in proportion to the level of contamination of briquettes from steel chips with non-metallic inclusions. According to the calculations when heating briquettes by 100—800 degrees in the converter, the increase in energy consumption of the converter process is from 60 to 630 MJ / t and from 445 to 1000 MJ/t for contamination of briquettes with non-metallic inclusions of 2.47 and 7.87 % by weight in accordance. With the reduction of briquette contamination, the efficiency of preheating of the metal charge increases. The share of the impact of the level of briquette contamination on the overall energy efficiency of the converter process is on average 0.3 % of the total energy savings of 1.91—1.92 GJ / t, which is achieved by increasing the share of scrap metal in the charge.

A Proposal for the Optimisation of Algorithms for the Calculation of the Energy Demands of Residential Housing

In response to increased energy consumption and CO2 emissions, various energy efficiency policies, standards and housing certifications have emerged around the world. These aim to measure and quantify energy efficiency and endorse homes for meeting certain standards according to consistent categories that vary by continent or country. These energy rating systems correspond to a series of criteria and formulations that, through the calculation and combination of multiple variables, establish the classification values. In Chile, there is the Energy Rating System for Housing (CEV), which performs energy efficiency calculations using dynamic heat balance spreadsheets in Microsoft® Excel. When applied for everyday use and at a large scale, this system has the disadvantage of requiring a great deal of processing time for each simulation. This research proposes an improvement to the CEV energy demand calculation mechanism by generating a solution that takes advantage of the use of multiprocessors and implements the various algorithms in the C programming language. The results show that the CEV values obtained with the proposed calculation engine are equal to those of the current system but demonstrate a 76.5% improvement in their processing time.

Comparison of Energy Consumption of Cereal Grain Dryer Powered by LPG and Hard Coal in Polish Conditions

The calculation method commonly used in the industry takes into consideration mainly fuel consumption (excluding electricity) and the amount of removed moisture which is reflected in the unit MJ·(Mg·%)−1. This is not a scientific approach because the result will change if the basic moisture is different (drying from 21% to 18% will consume less energy than drying from 18% to 15%). This paper aims to compare the energy consumption of two industrial continuous flow grain dryers powered by LPG and hard coal based on a comprehensive approach to energy efficiency calculation enriched with electricity consumption, flow measurements, and control of grain moisture. It could be useful for manufacturers who could use this method to generate more reliable data in their product datasheets, and it could also be legally regulated as an appropriate tool for calculating the energy consumption of agricultural grain dryers. According to the approach presented in this paper, the S428.CS construction powered by LPG gas had an energy consumption that was 6.14% lower than the DT2532 dryer construction, which used hard coal.

Optimum dopant of barium zirconate electrolyte for manufacturing of protonic ceramic fuel cells

We examine ceramic tape-casting and anode electrolyte co-firing for large-scale manufacturing of protonic ceramic fuel cells. We confirm the reactivity of Ni, a commonly used anode, with BaZr0.8M0.2O3−δ (BZM20: M = Sc, In, Lu, Yb, Y or Gd). Addition of 0.4 mol% NiO to BZM20 and co-firing at 1778 K, produces BaM2NiO5 for M = Y and Gd. No reaction occurs for M = Sc, In, Lu and Yb. The proton conductivity of all BZM20s decreases by approximately 30% because of NiO doping and dehydration on dissolution NiO. Energy efficiency and power density calculations of the fuel cells based on measured proton and hole conductivities indicate respective decreases of approximately 10% and 75% ecause of the formation of a solid solution of NiO. We fabricate fuel cells by the tape-casting and anode electrolyte co-firing with BZM20 (M = Yb or Y). For M = Y, the cell cannot be fabricated because formation of BaY2NiO5 causes cell cracking. Conversely, when M = Yb, a cell with a maximum output of 0.5 Wcm−2 at 873 K is fabricated. Hence, BZYb20 is a suitable material for tape-casting and anode electrolyte co-firing.

ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ ТЕХНОЛОГІЇ ВИРОЩУВАННЯ СІЛЬСЬКОГОСПОДАРСЬКИХ КУЛЬТУР НА ЗРОШУВАНИХ ЗЕМЛЯХ ПІВДНЯ УКРАЇНИ

The article reflects the results of research on the study of crop rotation productivity and energy efficiency components of crop rotation technology in terms of depending on different methods and depth of basic tillage. The purpose of the research was to determine the impact of basic tillage and fertilization on crop rotation productivity indicators and indicators of economic efficiency of crop rotation technology in irrigated conditions in the south of Ukraine. Methods: the field, in-gravimetric, visual, laboratory, calculation-comparative, mathematically-statistical and confessedly in Ukraine methods and methodical recommendations. The research was conducted during 2016-2019 in the research fields of the Askanian SARS IIA NAAS of Ukraine. Results. The use of differentiated and shallow single-depth system of basic tillage to the same productivity indicators at the level of 8.21 and 8.22 t.o.o./ha of products. However, the use of shallow tillage with different depths increased the productivity to 8.49 tons of water/ha, or 3.3%, and with no-till the lowest productivity was obtained 7.15 tons of water/ha. At the same time, the organo-mineral system of fertilizer N90P40 + green manure + crop residues yielded at the level of 7.61 tons per hectare. The improvement of nitrogen nutrition of crop rotations to N105P40 + green manure to get her with the earning of crop residues increased this figure to 8.06 ton so.o./ha, or 5.9% more than the control. At the same time, the maximum productivity indicators of 8.52 tons per hectare were obtained for the N120P40 system + green manure + post-harvest residues, which is actually 12% more than in the control. The reduction of total energy consumption was obtained with a shallow single-depth system of main cultivation of 26.45 GJ/ha, and the lowest values of 25.27 GJ/ha were obtained with no-till, which is 6.8% less than in the control. Application of organo-mineral fertilizer system N90P40 + green manure + post harvest residues formed costs at the level of 24.94 GJ/ha, increase of nitrogen nutrition of crop rotations to N105P40 + green manure with post harvest residues increased costs to 26.35 GJ/ha, and the highest costs 26.37 GJ/ha was obtained in the variant N120P40 + green manure, where the figures were higher by 11.5% compared to the control. Almost the same energy yield was obtained for differentiated and single-depth shallow tillage systems 127.33 and 127.64 GJha, respectively. The application of the system of multi-depth tillage increased the yield to 133.24 GJ/ha. Conclusion. The calculation of energy efficiency testifies that growing of agricultural cultures at bringing of N120Р40 + green manure + post-harvest residues in the system of the plowless on different depth is most expedient and justified from the power point of view. Technology of growing, which is based on these agrotechnology measures provides the receipt of maximal energy coefficient at the level of 4,96