Method of Controlling the Energy Balance of Electrolytic Cells for Aluminum Production

Sysoev, I. A.; Ershov, V. A.; Кондратьев, В. В.

doi:10.1007/s11015-015-0134-1

Cited by 17 publications

(9 citation statements)

References 3 publications

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“…The grid of control volumes for each calculation model of the experimental heat exchanger was prepared based on the geometric and dimensional features of the models to ensure a sufficient level of numerical convergence of the problems. [6][7][8][9] Each of the problems was solved in a static formulation iteratively until the calculated models achieve a completely equilibrium and stable state in the velocity fields and the simulated fluids costs, the heat brought and carried away from the simulated space, and also the stabilization of viscous and turbulent indicators:…”

Section: Description Of the Dynamic Model Of Gas Flowmentioning

confidence: 99%

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Modeling the Distribution of Temperatures on the Surface of a Heat Exchanger

Bludov¹,

Rasputina²,

Говорков³

et al. 2019

Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)

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This paper presents a simulation of the temperature distribution on the surface of a heat exchanger in the ANSYS application package. In the R&D part devoted to the development of a device for converting heat into electrical energy, models of an experimental heat exchanger have been created, including numerical models for calculating threedimensional distributions of the gas flow velocity, temperature fields, flow turbulence intensity and static pressure. An initial assessment of the parameters of the heat exchanger was carried out and the following predicted indicators were established at the flow rate and temperature of the inlet gases corresponding to data of the technical specifications. A combined analysis of the simulation results allows us to determine the zones for the most efficient installation of thermoelectric converters in electric energy: elements of the thermoelectric converter on the side surfaces of the cone. A prototype of the thermoelectric converter was developed and manufactured in the work, studies of thermoelectric conversion were conducted. The work also carried out the initial assessment of the state after the launch of prototypes of high-ampere electrolyzers of the RA-550 experimental section, namely, the measurement of the material balance of emissions through the housing lantern (outlet) and supply ventilation (inlet). All tasks of the stage have been fully resolved, the goals set and achieved, the results of the planned work received.

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Section: Description Of the Dynamic Model Of Gas Flowmentioning

confidence: 99%

“…The requirements for rational energy and resource conservation are increasing every day at enterprises of various industries around the world [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Distribution of Temperatures on the Surface of a Heat Exchanger

Bludov¹,

Rasputina²,

Говорков³

et al. 2019

Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)

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show abstract

“…In order to ensure the sustainable development of the aluminum industry, new strategies are needed to modernize existing production facilities, namely the use of new technological equipment capable of meeting existing standards in terms of environment, industrial safety, and efficiency. Thus, it is necessary to identify technical solutions for the conservation of materials and energy, and it is important to carry out studies aimed at identifying technological possibilities to reduce the consumption of materials and energy in the aluminum industry [3,4]. A particular problem concerns the durability of consumable carbon anodes.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Durability of Trimming Dies Used to Clean Anodes in the Aluminum Industry

Gârleanu

Borda

Gârleanu

et al. 2021

Metals

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Increasing the durability of trimming dies used to clean anodes is a very important goal in order to reduce the costs involved in obtaining aluminum. The research focused both on choosing an optimal material for the execution of trimming dies and on the application of technologies for plating active areas and, at the same time, on optimizing the geometric shape of the active area of the trimming die. In order to choose an optimal material from which to make the trimming dies, it was taken into account that they are usually made of X210Cr12 steel. In the stage of choosing an optimal material for the execution of the trimming dies, five steels were taken into account, namely: K105, K107, K110, K360, and K460. Analyses of the metallographic structure of the passage area were performed between the metal deposited by welding and the base material, demonstrating the fact that hot welding plating allows obtaining a more homogeneous metallographic structure compared to cold welding plating. The choice of new material was not a solution to increase the durability of the trimming die. Change in the trimming die geometry determined a reduction in deformations of about 13.8 times and of the equivalent stresses of about 7 times compared to those obtained in the case of the old trimming die. In addition, the durability of the trimming die with the new construction shape increases approximately three times compared to the trimming die with the old geometric shape. This demonstrates that the solution to increasing the durability of the trimming die is to adopt an optimal geometry of the active part at the expense of choosing an optimal material.

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“…The high temperature process has some intrinsic advantages over the reduction near room temperature in terms of reaction thermodynamics, kinetics and product selectivity. The temperature of the system can be self-heated by Joule heat originated from the electrolysis process, where no extra energy input is needed to maintain the operating temperature for an industrial cell, making the energy balance more attractive ( Sun et al., 2011 ; Sysoev et al., 2015 ). In addition, molten salts are also being used as effective media for commercial thermal energy storage heated by concentrated solar power in the world today, a large amount of CO 2 can be reduced if a renewable electricity (e.g., solar, hydroelectric etc.)…”

Section: Introductionmentioning

confidence: 99%

Tunable Selectivity and High Efficiency of CO2 Electroreduction via Borate-Enhanced Molten Salt Electrolysis

Deng

et al. 2020

iScience

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Summary Converting CO 2 into value-added chemical fuels and functional materials by CO 2 reduction reaction (CO 2 RR) is conducive to achieving a carbon-neutral energy cycle. However, it is still challenging to efficiently navigate CO 2 RR toward desirable products. Herein, we report a facile strategy to extend product species in borate-containing molten electrolyte at a positively shifted cathodic potential with a high current density (e.g. 100 mA/cm 2 ), which can selectively electro-transform CO 2 into desired products (either CO or solid carbon nanofibers, respectively reaching a high selectivity of ∼90%). The borates can act as a controller of electrolyte alkalinity to buffer the concentration of sequentially generated O 2− during CO 2 RR, positively shifting the reduction potential of the captured CO 2 and concurrently extending the product species. The sustainable buffering effect is available under CO 2 atmosphere. Compared with borate-free electrolyte, the CO 2 conversion efficiency is over three times higher, while the electrolysis energy consumption is decreased by over 40%.

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Method of Controlling the Energy Balance of Electrolytic Cells for Aluminum Production

Cited by 17 publications

References 3 publications

Modeling the Distribution of Temperatures on the Surface of a Heat Exchanger

Modeling the Distribution of Temperatures on the Surface of a Heat Exchanger

Increasing the Durability of Trimming Dies Used to Clean Anodes in the Aluminum Industry

Tunable Selectivity and High Efficiency of CO2 Electroreduction via Borate-Enhanced Molten Salt Electrolysis

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