• Energy Research
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Abstract The amount of household solid waste (HSW) has been significantly increasing due to a rapid population growth and economic development. HSW management is immensely sensitive and complicated problem not only in rapidly developing countries like Uzbekistan but also in developed countries with advanced economies.The accumulated waste has been causing a number of serious environmental problems such as release of the most dangerous greenhouse gases (CO2, N2O, CH4) in the atmosphere which misbalance radiation in a planet’s atmosphere causing a global warming. However, this waste can be friendly in terms of its potential to be used as energy source. HSW into energy conversion technologies has been playing a vital rolein order to successfully address global challenges suchas fossil fuel dependency, emission control and waste management issues.The most promising technology for conversions can be performed using thermochemical processes (e.g., pyrolysis or gasification).These thermochemical technologies can be used to convert solid waste into liquid and gaseous fuels, and this has already been studied sufficiently by other researchers. This article recommends a novel concept for intensification of value-added solid and liquid products recovery from HSW using hydrothermal carbonization and plasma treatment.

Since turning carbon neutral is regarded as a major macroeconomic agenda worldwide, this study examines whether financial globalization and good governance can help Brazil, Russia, India, China, South Africa, and Turkey in achieving carbon neutrality. Considering the period of analysis from 2000 to 2020 and utilizing robust econometric methods, it is observed that the environmental consequences vary across different components of financial globalization. In particular, the results validate the pollution haven hypothesis by confirming the carbon emission-boosting effect of de facto financial globalization indicators. In contrast, the pollution halo effect hypothesis is verified by the finding of the carbon emission-abating effect of de jure financial globalization indicators. Besides, promoting good governance is evidenced to impose carbon emission-mitigating impact in the long-run. The findings also authenticate the existence of the Environmental Kuznets Curve (EKC) hypothesis for the emerging countries of concern. Finally, for both the short and long runs, it is found that the non-renewable to renewable energy transition contributes to lower discharges of carbon dioxide, while urbanization results in the amplification of the carbon emission figures. Considering these critically important findings, it is necessary for these countries to impose restrictions on the influx of unclean foreign direct investment, facilitate and ease the investment process for foreign investors for investing in environment-friendly projects, promote good governance, and adopt green economic growth and sustainable urbanization policies by developing their respective renewable energy sectors.

Development of proposals for adapting the existing methodology for calculating the available throughput to the operating conditions of the railways of Uzbekistan, taking into account the factors that ensure traffic safety when passing high-speed passenger trains. Methods: Grapho-analytical approaches and a comparative analysis method were used to determine the throughput of railway lines with mixed train traffic. Results: The main factors influencing the capacity of lines, advantages and disadvantages for each existing method for determining the capacity of railway lines are given. To assess the quality of transportation processes on railway lines, experimental train schedules were constructed. Based on the analysis of their indicators, a formula was proposed for calculating the throughput on double-track lines when passing high-speed passenger trains. Practical significance: The application of the proposed methodology improves the calculations of the performance indicators of sections with an unparalleled train schedule.

The study aims to explore the asymmetric impact of financial globalisation on renewable CO2 emissions for selected Asian economies for a time span from 1990 to 2019. A sample of 35 economies is selected on the basis of the availability of data. To get the estimates of the variables, the analysis has applied FMOLS and DOLS estimation methods. The linear estimate of financial globalisation in the FMOLS model is negative and significant but positive and insignificant in the DOLS model. The estimates attached to positive financial globalisation are negatively significant in both FMOLS and DOLS models, implying that an increase in financial globalisation causes the environmental quality to improve. Similarly, the estimates attached to negative financial globalisation in both FMOLS and DOLS are negative and suggest that a fall in financial globalisation causes the environmental quality to deteriorate. The magnitudes of positive and negative changes are different; hence, they have a significantly different impact on environmental quality. The robust results clearly indicate that the effects of financial globalisation on CO2 emissions are asymmetric. Therefore, the policymakers should focus on positive as well as negative changes in financial globalisation while considering the impact of financial globalisation on CO2 emissions in Asian regions.

This study seeks to estimate energy poverty using a multidimensional and wide-ranging category of indicators via the GRA-SRA approach. The study entails a case study analysis of the N-11 nations utilizing data from 2000 to 2017. Thus, a formulation of multidimensional energy poverty indexes of multidimensional indicators crosswise three dimensions is carried out. Energy availability, energy affordability, and energy cleanability, with regard to the N11 nations, are taken into account. The findings reveal that total energy poverty has progressed. We discover that Bangladesh (0.65) and Pakistan (0.47) are at risk concerning energy poverty, whereas the Philippines (0.36), Indonesia (0.33), and Vietnam (0.28) are less exposed to energy poverty. The relative changes in energy poverty are discovered among the N11 nations, where South Korea witnessed a consistent advancement in energy poverty, whereas Iran displayed a reduced trajectory and a vacillating trend. The findings indicate that the energy sources utilized for warming homes are essential within the scenario of energy poverty and inequality. Contrary to traditional steps, we assess the multidimensional energy poverty at the national level instead of the depths of gravity of energy poverty specifically for the energy-poor as against the whole population.

Renewable energy technologies play a crucial role in solving global energy and environmental issues, and the pace of the energy transition directly depends on improving their efficiency. Presently, the development and implementation of renewable energy systems are ensured mainly through state funding, the possibilities of which are limited. The potential of attracting private investments depends directly on their impact on companies’ profitability indicators, and the uncertainty regarding the return on investments is one of the main barriers affecting investors’ decision-making. Based on a vector autoregressive model for analysing the stationary time series, the paper explores the impact of long-term investments and research and development costs in renewable energy technologies on the financial performance of ten of the largest companies operating in this field. The study’s results showed that investments and spending on research and development positively affect such companies’ profitability indicators as earnings before interest, taxes, depreciation and amortisation, earnings before interest and tax, net income, and return on investment. The obtained results can be used to substantiate the economic effectiveness of investments in developing and improving renewable energy technologies when forming the companies’ financial policies to support them.

This paper examines for the first time the relationship between CO2 emissions and the consumption of renewable and non-renewable energy in Uzbekistan, spanning the period 1985-2020. The analysis uses the Autoregressive Distributed Lags (ARDL) model to estimate the long-run dynamic multipliers and short-run elasticity coefficients of energy consumption variables. Economic factors, such as GDP, are excluded in the analysis as they may cause multicollinearity problems. The empirical results document that in the short- and long-run, hydropower (renewable) energy consumption negatively impacts CO2 emissions per capita, showing a unidirectional causal effect. As regards with non-renewable energy consumption, natural gas and oil energy consumption have a positive impact on CO2 emissions per capita both in the short and long run. Coal consumption positively impacts CO2 emissions in the short run, while it is negative in the long run. Policy measures to enhance the collection of energy from additional renewable energy sources, in particular hydropower, should be taken into account in order to increase the share of renewable energy, and thus, to compensate non-renewable energy consumption which is the main contributor to CO2 emissions. Moreover, solar and wind energy should be explicitly taken into consideration as an additional renewable energy source, which has the lack of attention by policymakers. Furthermore, policy actions, such as the involvement of the private sector into renewable energy projects and the implementation of effective carbon tax policies, could be further options to reduce CO2 emissions.

Abstract In addition to the reliability of power supply quality of electricity consumers are one of the most important characteristics of the electrical systems. It has a significant impact on the efficiency of electrical receivers and the technical and economic performance electric networks. In the modern developed networks providing quality indicators of energy acceptable for consumers, requires significant cost of funds and materials, as well as the collection and processing of more information. This explains the importance of the questions of power quality in the complex problem of the design and operation of electrical systems. If the provision in the electrical systems normalized values of the frequency is mainly due to the balance of active capacity and characteristics of the appropriate equipment on the electrical stations, the quality of the voltage at the consumer is determined mainly by cost distribution networks. For consumer’s rural areas referred to the costs are most of the total production costs and electricity transmission, so questions quality assurance voltage networks always were in the focus of research, design, and operational organizations. Particular attention these questions acquire at present in connection with the rapid growth of electricity consumption in agriculture and the relevant development of rural networks. The huge positive effect electrification to fully manifest only when consumers are delivered electricity is quite high quality. Reduction of the quality of significantly impairs performance electrical receivers and leads to marked electro receivers damage.

Abstract At present in Uzbekistan are used more then 900 thousand passenger cars and annual surge its in atmosphere poisoning gas forms more, than 20 tons. Herewith disperses them several hundred of a thousands of the tons organic fuel. The research is connected with increasing of ecological safety of the transport facilities, saving resource fuel and searching for of the ways in their realization (Novikov Y, Beknazov R. Environmental the guard. Tashkent 1992; 295. [1] ]. The priority direction is a creation ecological clean transport facilities, for example, cars with hybrid drive and electric cars (Stone J. (1998). Electric motor with oil cooling in hybrid drive of the car. Auto industry overseas (Eureka transfers technology). No. 1, pp. 5–7. [2] ]. The technological model of the car is offered with hybrid drive with built-in in hub wheel the electric motor. The main source to electric powers of the car serves the storage battery. The charger for storage battery is internal combustion engine connected with generator of the direct current. In addition in car are installed micro turbine, working from pair of the high pressure and silicon photovoltaic converter (PV system) evenly located on surface of the roof, front and back hoods. They are also connected with storage battery. Herewith traditional lamps of the illumination are replaced on electroluminescent radiators.

This study analyzes the relationship between renewable energy and CO2 emissions in top natural resource depending countries over the period 2000–2015. An important contribution of this study is to assess the role of governance. The Ordinary Least Squares Fixed effects Generalized Least Squares methods and two-step GMM estimators are used for panel data. The empirical results show that renewable energy has significant negative impact on per capita CO2 emissions. The estimates show that 1 percentage point increase in renewable energy consumption leads to 1.25% decrease in CO2 emissions per capita. We also find that renewable energy consumption decreases CO2 emissions faster in countries with higher rule of law and voice and accountability. gross domestic product per capita has inverted U-shaped relationship with CO2 emissions.