Mathematical modelling of light dependent microorganisms cultivation in countercurrent film reactor

Shevtsov, A. A.; Лыткина, Л. И.; Антипов, С. Т.; Остриков, А. Н.; Шенцова, Е. С.; Дранников, А. В.; Коптев, Д. В.

doi:10.1134/s004057951603012x

Cited by 12 publications

(3 citation statements)

References 3 publications

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“…At the same time, from an economic point of view, it is important to systematically reduce energy costs to ensure the required temperature regime throughout the year when the values of outdoor air temperature and natural solar radiation vary in a wide range. In scientific works devoted to the influence of air temperature in the production room on the human body, it is indicated that a decrease in temperature by 4 °C is considered sharp for the human body [19][20][21][22][23][24][25][26][27][28][29][30], but at the same time it can significantly reduce heating costs. In addition, a decrease in temperature from the normalized values during vaccination and the fight against viral seasonal diseases can lead to a decrease in workers' immunity.…”

Section: Discussionmentioning

confidence: 99%

Mathematical modeling of the temperature regime in industrial premises

et al. 2023

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Comfortable temperature conditions in any room are provided by heating systems, thermal insulation properties of enclosing structures, external environmental conditions. Practical experience, literature analysis show that the existing temperature control systems in industrial premises have disadvantages. Eliminating is possible by using a multi-circuit functional control structure, allowing to reduce the inertia of the temperature control system by taking into account the outdoor temperature, the influence of natural light on the temperature inside the production facility. For its operation, a practically oriented mathematical model is needed, which allows taking into account the influence of a large number of external factors on the temperature regime with minimal delay. A mathematical model has been developed for use as a program in industrial electronics devices for predicting, correcting the temperature field, regulating the temperature regime in the production areas of a room at any point. Based on experimental data, the analysis of the results of the adequacy of the mathematical model shows that the temperature values obtained by the mathematical model of forecasting, correction of the temperature regime fall within the confidence interval and are within the standard deviation. The mechanism of technical implementation is proposed and the prospects of its use are shown.

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Section: Discussionmentioning

confidence: 99%

Mathematical modeling of the temperature regime in industrial premises

et al. 2023

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“…In addition, the movement of the material along the x axis will be neglected by u ≈ 0. With regard to the problem under study on a symmetric integration interval, in the case of a limited solution at both ends of the segment [-t, +t], we have [4][5][6][7][8][9][10][11][12][13][14][15]:…”

Section: Development Of a Mathematical Modelmentioning

confidence: 99%

Improving the reliability of the hammer grain crusher by optimal design of the paddle wheel

Dorodov

Kasatkin

Petrov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Now in agricultural production there are significant changes in the fleet of equipment due to the renewal of the material and technical base with improved parameters for quality, reliability, durability and operability in difficult operating conditions. However, the manufacturing industry still has a large number of outdated equipment that requires modernization through optimal design of machine components and parts. So, in the process of feed preparation, closed-type grain crushers are widely used, working on the principle of suction of the source material and injection of the finished product. This type of crushers undergoes significant abrasive wear of working bodies (drums, hammers, sieves, etc.) due to their suboptimal geometric shape of transition surfaces, where local stresses accumulate, as well as in areas of contact of parts with particles of gas-dispersed material. The blades of the drum wheel are subjected to particularly severe wear, for the restoration of which significant material costs are required during major repairs. The paper presents theoretical studies of contact stresses during wear of working surfaces, a criterion and condition for the optimal position of the blade are proposed. The optimal position of the blade has been determined - it must be positioned at an angle of 10 ° to the axis of the drum wheel. The results of field tests of the upgraded crusher allow us to conclude that the reliability indicators (durability of the blade drum and reliability of the crusher) increase by more than 3 times.

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“…New modeling technologies are an innovative approach to the "life" cycle of design-productionoperation of a technical system. The development of an adequate mathematical and physical model of the working process of the machine makes it possible to increase speed, economic efficiency, reliability in the design of components and mechanisms, as well as optimize the design of new or upgraded equipment [1][2][3][4][5][6][7][8]. Currently, hammer-type grain crushers are widely used in the production of feed.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the stress state during blade wear and optimal design of the grain crusher wheel

Dorodov

Kasatkin²,

Petrov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Currently, in the manufacture of agricultural products in the process of feed preparation, closed-type grain crushers are widely used, working on the principle of suction of the starting material and injection of the finished product. This type of crushers undergoes significant abrasive wear of working bodies (drums, hammers, sieves, etc.) due to their suboptimal geometric shape of the transition surface, where local stresses accumulate, as well as in the areas of contact of parts with particles of gas-dispersed material. It is possible to investigate the causes of the rapid destruction of the working bodies of the crusher by theoretical methods and modeling of physical processes, which will increase the speed, economic efficiency, reliability in the design of components and mechanisms, as well as optimize the design of the upgraded paddle wheel. The paper presents a theoretical model of the stress state on the working surface of the blade, the adequacy of which is confirmed by experimental data with a correlation coefficient of more than 0.95. Studies have allowed optimizing the position of the blade, at which it must be positioned at an angle of 10 ° to the axis of the wheel of the crusher drum, while the contact stresses on the wear surface are distributed almost evenly. This design change will lead to uniform wear of the blade and, as a result, to an increase in durability and reliability of the crusher.

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Mathematical modelling of light dependent microorganisms cultivation in countercurrent film reactor

Cited by 12 publications

References 3 publications

Mathematical modeling of the temperature regime in industrial premises

Mathematical modeling of the temperature regime in industrial premises

Improving the reliability of the hammer grain crusher by optimal design of the paddle wheel

Simulation of the stress state during blade wear and optimal design of the grain crusher wheel

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