Predicted Economic Efficiency of Combining NPPS with an Autonomous Hydrogen Energy Complex

2019 ◽  
pp. 40-51 ◽  
Author(s):  
V. Е. Yurin ◽  
A. N. Egorov
Keyword(s):  
Economic Efficiency ◽  
Hydrogen Energy ◽  
Energy Complex

EFFICIENCY INVESTIGATION OF THE WAYS OF COMBINING NPP WITH A HYDROGEN COMPLEX FOR THE PURPOSE OF SALE OF HYDROGEN AND GENERATION OF ADDITIONAL ELECTRIC POWER

2020 ◽  
pp. 19-29
Author(s):  
V.E. Yurin ◽  
◽  
A.N. Egorov ◽  
D.O. Bashlykov ◽  
A.B. Moskalenko ◽  
...  
Keyword(s):  
Economic Efficiency ◽  
Low Cost ◽  
Energy System ◽  
Operating Conditions ◽  
Hydrogen Energy ◽  
Utilization Factor ◽  
Energy Complex ◽  
Load Schedule ◽  
Installed Capacity ◽  
Maximum Utilization

With an increase in the share of NPPs in the energy system, it becomes necessary for them to participate in the regulation of the electric load schedule. At the same time, the operation of the NPP with the maximum utilization factor of the installed capacity of the reactor was economically and technically justified. One of the promising ways to solve this problem is to install consumers-regulators at NPPs. The hydrogen energy complex can be effectively used as a consumer-regulator. The authors have previously developed an autonomous hydrogen energy generating complex, scientifically substantiated its economic efficiency. As the study has shown, the economic efficiency of an autonomous hydrogen energy complex directly depends on the sale tariffs for electricity. The low cost of electricity sold leads to a deterioration in economic indicators, up to a lack of recoupment. In this regard, as an alternative option, this work considers the possibility of selling hydrogen and oxygen as a commercial product at existing prices. A comparative study for a range of electricity tariffs and prices for hydrogen and oxygen was carried out on the basis of the methodology presented earlier by the authors, which makes it possible to study ways to improve NPPs on the basis of a comprehensive analysis of economic efficiency, safety and system effects achieved during the installation of new and modernization of existed equipment. The results obtained make it possible to choose the type of hydrogen energy complex depending on the operating conditions for the selected region of operation.

HYDROGEN-OXYGEN STEAM GENERATOR FOR A CLOSED HYDROGEN COMBUSTION CYCLE

2018 ◽  
pp. 68-79
Author(s):  
R. Z. Aminov ◽  
A. N. Egorov
Keyword(s):  
Steam Generator ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Combustion Products ◽  
Working Fluid ◽  
Hydrogen Energy ◽  
Energy Complex ◽  
Steam Turbine Plant ◽  
Oxygen Medium

The paper analyzes the problems of combustion hydrogen in an oxygen medium for produce high-temperature steam that can be used to produce electricity at various power plants. For example, at the nuclear power plants, the use of a H2-O2 steam generator as part of a hydrogen energy complex makes it possible to increase its power and efficiency in the operational mode due to steam-hydrogen overheating of the main working fluid of a steam-turbine plant. In addition, the use of the hydrogen energy complex makes it possible to adapt the nuclear power plants to variable electric load schedules in conditions of increasing the share of nuclear power plants and to develop environmentally friendly technologies for the production of electricity. The paper considers a new solution of the problem of effective and safe use of hydrogen energy at NPPs with a hydrogen energy complex.Technical solutions for the combustion of hydrogen in the oxygen medium using direct injection of cooling water or steam in the combustion products have a significant drawback – the effect of “quenching” when injecting water or water vapor which leads to a decrease in the efficiency of recombination during cooling of combustion products that is expressed in an increase fraction of non-condensable gases. In this case, the supply of such a mixture to the steam cycle is unsafe, because this can lead to a dangerous increase in the concentration of unburned hydrogen in the flowing part of the steam turbine plant. In order to solve this problem, the authors have proposed a closed hydrogen cycle and a hydrogen vapor overheating system based on it, and carried out a study of a closed hydrogen combustion system which completely eliminates hydrogen from entering the working fluid of the steam cycle and ensures its complete oxidation due to some excess of circulating oxygen.The paper considers two types of hydrogen-oxygen combustion chambers for the system of safe generating of superheated steam using hydrogen in nuclear power plant cycle by using a closed system for burning hydrogen in an oxygen medium. As a result of mathematical modeling of combustion processes and heat and mass transfer, we have determined the required parameters of a hydrogen-oxygen steam generator taking into account the temperature regime of its operation, and a power range of hydrogen-oxygen steam generators with the proposed combustion chamber design.

scholarly journals Prospects and Obstacles for Green Hydrogen Production in Russia

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 718
Author(s):  
Alexandra Kopteva ◽  
Leonid Kalimullin ◽  
Pavel Tcvetkov ◽  
Amilcar Soares
Keyword(s):  
Renewable Energy ◽  
Hydrogen Production ◽  
Economic Efficiency ◽  
Market Price ◽  
Energy Transition ◽  
Hydrogen Energy ◽  
Global Trends ◽  
Sustainable Solutions ◽  
Energy Trade

Renewable energy is considered the one of the most promising solutions to meet sustainable development goals in terms of climate change mitigation. Today, we face the problem of further scaling up renewable energy infrastructure, which requires the creation of reliable energy storages, environmentally friendly carriers, like hydrogen, and competitive international markets. These issues provoke the involvement of resource-based countries in the energy transition, which is questionable in terms of economic efficiency, compared to conventional hydrocarbon resources. To shed a light on the possible efficiency of green hydrogen production in such countries, this study is aimed at: (1) comparing key Russian trends of green hydrogen development with global trends, (2) presenting strategic scenarios for the Russian energy sector development, (3) presenting a case study of Russian hydrogen energy project «Dyakov Ust-Srednekanskaya HPP» in Magadan region. We argue that without significant changes in strategic planning and without focus on sustainable solutions support, the further development of Russian power industry will be halted in a conservative scenario with the limited presence of innovative solutions in renewable energy industries. Our case study showed that despite the closeness to Japan hydrogen market, economic efficiency is on the edge of zero, with payback period around 17 years. The decrease in project capacity below 543.6 MW will immediately lead to a negative NPV. The key reason for that is the low average market price of hydrogen ($14/kg), which is only a bit higher than its production cost ($12.5/kg), while transportation requires about $0.96/kg more. Despite the discouraging results, it should be taken into account that such strategic projects are at the edge of energy development. We see them as an opportunity to lead transnational energy trade of green hydrogen, which could be competitive in the medium term, especially with state support.

scholarly journals Application of AEC (RES) as a way to increase the competitiveness of industrial organizations

2021 ◽  
Vol 296 ◽  
pp. 02009
Author(s):  
Alena Y. Tyutrina
Keyword(s):  
Economic Development ◽  
Economic Efficiency ◽  
Industrial Enterprise ◽  
Sustainable Economic Development ◽  
Energy Complex ◽  
Industrial Organizations

This article considers the necessity to replace traditional sources of electricity with renewable ones. An industrial enterprise is chosen as an object, on the basis of which the economic efficiency of installing microgrid as an active energy complex is calculated within the framework of the seventh goal of sustainable economic development.

scholarly journals Comparative Efficiency Evaluation of Hydrogen Energy Complexes Based on Reversible Fuel Cells and Hydrogen-Thermal Storage When Combined with Nuclear Power Plants

2021 ◽  
Vol 2096 (1) ◽  
pp. 012083
Author(s):  
A N Egorov ◽  
A N Bayramov
Keyword(s):  
Fuel Cells ◽  
Economic Efficiency ◽  
Nuclear Power ◽  
Power Plants ◽  
Technology Development ◽  
Mechanical Energy ◽  
Economic Effect ◽  
Hydrogen Energy ◽  
Capital Investments ◽  
Comparative Efficiency

Abstract This work evaluates the technical and economic efficiency of combining NPPs with a system based on reversible fuel cells (RFC) in comparison with the well-known approach of hydrogen-thermal accumulation (HTA) using an additional low-power steam turbine unit. One of the main advantages of RFC is its ability to alternately operate both in the electrolysis mode in order to accumulate off-peak electricity, and in the fuel cell mode to generate peak electricity without converting hydrogen fuel energy into thermal or mechanical energy. The authors developed a schematic diagram and methodology for assessing efficiency of using RFC at NPPs. The calculations have shown that at the present stage of technology development, the use of RFC is less effective in comparison with the system based on HTA. At the same time, until 2035the advantage of the HTA will grow from 9.68%, excluding the economic effect from preventing unloading of the NPP, up to 25.31% in the current scenario, taking into account the economic effect from preventing unloading of the NPP. The target level of base specific capital investments in the proposed RFC system (units with a unit capacity of 250 kW) has been determined, providing equal technical and economic efficiency in comparison with HTA, which amounted to 1079-1134 $/kW

Container Port Production and Economic Efficiency

2005 ◽  
Author(s):  
Teng-Fei Wang ◽  
Kevin Cullinane ◽  
Dong-Wook Song
Keyword(s):  
Economic Efficiency ◽  
Container Port
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