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In the framework of the article road paving panels for “Smart Roads” system have been developed and calculated with an analyzed amount of generated and consumed electric energy. Modern road is currently to be taken as a separate part of construction as well as a bright and integral part of entire architectural ensemble of the surrounding area. One of the main requirements for modern roads is that they have to be fully self-maintained and operate as alternative and decentralized energy sources as well. The paper presents a design of the road paving panel for “Smart Roads” system and reveals the principle of its function. The amount of electricity generated per unit of road surface has been calculated. It is shown that for their own needs road paving panel will consume up to 71.25% of the total energy generated.

Abstract Five different models for calculating solar module temperature, output power and efficiency for sunny days with different solar radiation intensities and ambient temperatures are assessed in this paper. Thereafter, modeled values are compared to the experimentally obtained values for the horizontal solar module in Nis, Serbia. The criterion for determining the best model was based on the statistical analysis and the agreement between the calculated and the experimental values. The calculated values of solar module temperature are in good agreement with the experimentally obtained ones, with some variations over and under the measured values. The best agreement between calculated and experimentally obtained values was for summer months with high solar radiation intensity. The nonlinear model for calculating the output power is much better than the linear model and at the same time predicts better the total electrical energy generated by the solar module during the day. The nonlinear model for calculating the solar module efficiency predicts the efficiency higher than the STC (Standard Test Conditions) value of solar module efficiency for all conditions, while the linear model predicts the solar module efficiency very well. This paper provides a simple and efficient guideline to estimate relevant parameters of a monocrystalline silicon solar module under the moderate-continental climate conditions.

This paper outlines the prospect of obtaining water from atmospheric air by cooling it to the dew point temperature using refrigeration machines in order to partially reduce water scarcity in the arid regions of our planet. To minimize energy costs in the systems for obtaining water from atmospheric air, it is proposed to utilize solar energy with absorption refrigeration units (ARUs) acting as a source of artificial cold. The characteristic thermodynamic processes have been analyzed in a modernized ARU, capable of working at a lower thermal energy source's temperature than its analogs. The possibility has been studied to reduce the temperature of the heat source by including a solution vaporizer in the ARU scheme. The analysis involved an authentic method based on the balance of specific streams of ARU working body components and actual boundary conditions at characteristic points of the cycle. A limit was shown for the level of a minimum boiling temperature in the ARU generator (from 90 °C) when the systems for obtaining water from atmospheric air are operated under current climatic conditions. The simulation of heat-and-mass exchange processes during contact interaction between a steam-gas mixture and ammonia water solution was carried out. Based on variant calculations, it has been shown that the proposed ARU structure with an adiabatic solution vaporizer could work as part of systems to obtain water from atmospheric air at a hot spring temperature above 100 °C and constructively enough fits into the element base of standard models. It has been proposed to use two types of solar thermal energy sources to operate ARU. In a tropical climate, with vacuum solar collectors or solar energy hubs; in a temperate climate zone, with solar collectors with water as a heat carrier

The article examines the role and importance of bioenergetics as a priority area of the grain market activation, outlines its state and problems, identifies approaches of its development considering current challenges and demands. The need to develop bioenergetics is associated with the rapid growth of the production of grain and grain-legume crops, which generates additional challenges and problems. It is worth noting among these: intensification of competition in global markets; reduction of the world prices and, consequently, the decrease in export revenues; lack of capacity and warehouses for reliable storage and high-quality processing of grain and their obsolescence; low logistical capacity of domestic ports and railway transport; limited distribution channels; increasing unemployment in rural areas due to the application of modern innovative agricultural technologies with high productivity; low capacity of processing plants; deformation of traditional production chains. This research clarifies the role of bioenergetics as a priority area for activation of the grain market, outlines its state and problems, and identifies the approaches to its development considering current challenges and demands. The greatest threats to the implementation of plans concerning the development of biofuel technologies in Ukraine are the following: 1) steady tendency towards a decrease in energy prices on the world market is the risk of the unprofitability of biofuel technologies; 2) unstable tax legislation poses financial investment risks; 3) non-market prices for competing fuels for the population (in particular, electricity and gas) results in the lack of population’s incentive to turn to alternative energy sources; 4) lack of sufficient capacity to store the required volumes of guaranteed sources of raw materials; 5) shortcomings in effective mechanisms to stimulate renewable energy, etc. Elimination and overcoming of the above-mentioned barriers will intensify biomass involvement in country’s energy balance and contribute significantly to strengthening Ukraine’s energy independence. Thus, in the near future, it is necessary to solve all the problems that hinder bioenergy development, which intensifies the progress of the grain market and directly affects the energy independence of our country.

The purpose of the article is to form and develop theoretical and methodological foundations for the diagnostics of objects of innovative work as an instrument for increasing the innovation activity of the personnel of the enterprise. Structural decomposition of constituents of innovation work at the enterprise is presented. It was established that the program for diagnosing objects of innovation work includes a linear algorithm, which consists of a sequence of actions such as: 1) the formulation of diagnostic objectives; 2) determination of internal losses in labor processes (assessment of the organization of work and production by business indicators: working time, resources and quality); 3) analysis of external factors and innovation risks; 4) assessment of resource capacity; 5) identification of objects of innovation work. It was found out that: 1) the result of the diagnostics of objects of innovation work is the definition of innovative opportunities in the system of organization of labor and production, which are the basis for the development and implementation of innovative proposals, which prompts the increase of innovation activity of personnel; 2) innovative activity of the personnel of the company depends on many factors, among which the innovative enterprise strategy plays an important role. The prospect of further research in this direction is the formation of practical recommendations for improving the system of partial diagnostic purposes of the company's polycriterial economic diagnosis, taking into account the presented research results.

The price of oil is one of the important macroeconomic indicators because of the extreme importance of supplying oil to different countries of the world to meet their energy needs. As Nigeria’s economy depends on oil prices, the country remains vulnerable to fluctuations in world oil prices. During periods of rising oil prices caused by macroeconomic and political conditions in the international market, the state usually has a positive trade balance, there is an increase in foreign exchange reserves and the revaluation of the national currency. The purpose of the article is to evaluate the relationship between an oil price change and Nigeria’s economic growth rate using regression analysis. The source of statistical information is data from the National Bureau of Statistics, the Nigerian National Petroleum Corporation, and the Nigerian Energy Commission. By checking the time series for steady-state using the advanced Dickie-Fuller test, a regression equation is constructed where the dependent variable is represented as the price of oil and the independent variables are key macroeconomic indicators. The econometric model constructed is adequate because the determination coefficient and the adjusted determination coefficient are 0.97 and 0.96 respectively. The Durbin-Watson statistic in the model is 1.98, meaning the model is reliable. Oil price fluctuations have been found to be related to investment, economic growth, and exchange rates, as well as to inflation. The paper argues that the use of the shock of oil prices should be supported, as it promotes economic growth and is not inflationary. Therefore, the authors believe that the government, which is the main beneficiary of cash, should also implement strategies that counterbalance the propensity for the economic downturn. Based on the analysis, a set of priority measures was proposed: enhancing financial liberalization, combating corruption, transparency of government activities, creating an open currency market, and developing non-inflationary monetary and fiscal strategies. Keywords: oil price, macroeconomic variables, energy needs, Organization of Petroleum Exporting Countries, Dickie-Fuller Extended Test, Petroleum Exporters.

The questions of tax planning as the one of conditions of effective development of native enterprises were studied. Despite the fact that in theory the taxes must not manage the whole activity of enterprise and essentially change the philosophy of business, on practice taxes are the powerful instrument of economic regulation, completely influence the degree of strategic decisions, compel leaders to change the tactics of enterprises actions cardinally. The analysis of the influence of accounting policy on tax commitments allows make a conclusion that the methods of costs accounting, methods of amortization charging, variants of valuation of assets and debts, possibility of creation of the reserve funds influence the reflection of the results of enterprise activity in financial reporting and, correspondingly, the value of taxation base. That is why their correct choice would help to the leaders of enterprise to choose the necessary levers of tax planning for optimization of taxation. The elements of accounting policy that influence or can influence the tax commitments on the example of accounting of the fixed assets are considered. The algorithm of calculation of economic effect in the result of the use of mechanism of accelerated amortization of the active part of fixed assets on the base of given value of money was offered and the influence of the part of surplus value on the choice of tax system was analyzed on the example of formation of enterprise amortization policy. The elaborated algorithm of tax optimization allows mobilize the additional investment resources of economic subject and decrease the tax load. The offered calculation of the value of economic effect relative to the cost of each group by operation life has a great practical importance, because it demonstrates the sum of profit, lost at the end of service term of each group depending on operation life.