Abstract. Our paper analyzes economic prospects and development of power engineering enterprises in Russian Federation. We show that despite the growth in use of renewable energy sources, the increase of organic fuel consumption is observed, and this is one of the key factors of traditional manufacturing effi ciency improvement related to energy conversion in the power-plant industry in Russia. Cost forecast for mastering the manufacture of advanced generation equipment by Russian enterprises can yield the price competitiveness of the given type of products. Our results demonstrate that the increase in the share of expenses for research and development by means of mobilization of resources from generation enterprises might result in the considerable technological potential for Russian power-plant industry. We conclude that Russian power industry can achieve a dominant position at the domestic and global markets of power generation technologies provided new resources are secured for its development.
The paper discusses the issue of improving the management system of the energy complex sustainable development at the territorial level from the perspective of ensuring energy security. It proposes the management models of the electric power and heat supply territorial systems development that allow taking into account current trends of expanding the use of market mechanisms to manage territorial energy production and to ensure a balance of interests of management subjects at various organizational levels. Based on a multidimensional statistical analysis for selected groups of Russian regions, it gives recommendations on choosing a priority strategy to reduce the energy intensity of the gross regional product.
A subject of the present article is the mechanism of hydraulic hammer emergence and main principles of functioning of devices that protect pipeline against its destructive effect. Special attention is paid to reviewing of ability of undissolved air containing in fluids to reduce the power of hydraulic hammer. According to the calculation results the volume concentration of undissolved air necessary for 1068 Andrey Rogalev et al. protection of pipelines against destruction from hydraulic hammer is not higher than 5%. In spite of the fact that this way of protection from hydraulic hammer is not versatile its successful usage for wastewater disposal pipeline is possible and optimal way of pipeline system aeration is represented by air inlet at the suction nozzle of the pump.
Currently, the majority of world economies (even those located in the sunbelt (+/− 35 degrees of latitude with good sunshine with low seasonality) uses various types of fossil fuels as the main source of energy for their economies. However, this represents a very volatile and unsustainable strategy, since according to various estimates, the fossil fuel era will inevitably end as all carbon fuels are going to be spent in the next few centuries. Unlike traditional energy, renewable energy sources (RES) are not based on energy resources, but rather rely upon natural energy flows. With regard to its unique property, there has been an active construction of power plants of renewable energy and their gradual integration into national energy supply systems in recent decades. At the same time, the existing models of electricity markets were unprepared for their wide distribution. Hence, determination of the market value of energy generated by power plants using renewable energy sources becomes a particularly significant issue. This market value has to take into account the prevention of costs from the use of fossil fuels, as well as the resulting environmental benefits. Our paper proposes methods for solving this problem, contributing to the increase of economic efficiency of investment projects for the construction of renewable energy facilities and the formation of economic incentives for their propagation in energy supply systems. The proposed methods are based on the dynamic differentiation of tariffs for consumers with renewable energy sources depending on their structure of electricity consumption. Its effectiveness is demonstrated by calculating the cost of electricity for households located in the Krasnodar region using renewable energy sources. It is shown that this approach to the formation of tariffs for consumers allows the household to receive additional savings from the efficient use of energy installations on RES and energy storage devices in terms of alignment of the energy consumption schedule. This creates a significant incentive for households to use them and contributes to increasing the effectiveness of government renewable energy support programs, including by solving the acute problem of raising electricity tariffs from the grid.
The paper deals with the design problem of gas turbine-based CHP oriented for working on temperature chart of a district heating (DH) 150/70 °С. This problem is caused by the low temperature corrosion of heating surface during the non-heating season. The existing solutions, which base on blending water at the exit from a gaswater heat exchanger (GWHE) on the recirculation line, cannot provide the acceptable 1560 Evgeny Lisin et al. parameters of a heat carrier in a heat exchanger during the whole year and involve high power costs for own needs. It was offered to form a preheating circuit of delivery water, where return delivery one warms up to minimum permissible temperature at the entrance to GWHE. Based on this offer, there were designed two options of energy-conserving thermal schemes of a gas turbine-based CHP and was conducted comparative economic analysis.
<p>This article studies the nature and causes of the dynamic loads exerted by the flow on the walls of the equipment, on an example of a curved component of the steam turbine steam supply system and examines the existing flow stabilizers used to control such loads. Based on the analysis of the shortcomings found in these devices, the article offers new designs of flow stabilizers. The newly developed devices reduce the flow area of the pipeline approximately twice less than the existing ones, so, they were supposed to have much lower hydraulic resistance. The study of the new the flow stabilizers’ efficiency was performed with the use of CFD methods and assessed in comparison with their wide used analogues. Based on the evaluation data, the designed devices provide a comparable level of decrease in dynamic loads, however, they have about five times lower hydraulic resistance. According to their design features, they are also supposed to have better mechanic strength characteristics.</p>
The paper discusses the problem of improving the mechanisms for managing the development of electricity and heat supply systems in regions with the aim of increasing the efficiency of energy resources use in the context of liberalization of economic relations in the energy sector. On the basis of the considered methods and the compiled system of management efficiency criteria, the structural and functional decomposition of the energy complex development management system at the territorial level was carried out. The mismatch of the power system control system was revealed, caused by the complication of the control system and the composition of the decision-makers. Improved models for managing the development of electricity and heat supply systems in the country’s regions are proposed, allowing to take into account modern trends in the expansion of the use of market mechanisms for managing territorial energy and to ensure a balance of interests of management entities at various organizational levels. For their implementation, organizational mechanisms have been developed that describe the interaction of territorial government bodies and territorial generating companies in the implementation of investment programs. The proposed mechanisms for managing territorial energy allow in market conditions to fully use the production potential and incentives for the development of territorial generating companies, which creates conditions for reducing management costs and implementing the goals of state energy policy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.