Mathematical modelling of the hydrodynamic structure of flows in the apparatus for cultivating chlorella: Parametric identification of the mathematical model

Rakhmanov, Sh; Nematov, Abdugani; Azizova, Nigora; Abdullaeva, D. A.; Tukhtaev, Erkin E.

doi:10.1088/1755-1315/614/1/012152

Cited by 3 publications

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“…Figure 3 shows a schematic diagram of the operation of the Hall sensor with the MSP430G2131 controller on the DRV5023 IC [6,7]. Using it with a low power-consuming microcontroller, it is possible, thanks to a combination of software and hardware capabilities, to implement a battery-powered sensor [8,9] or with an autonomous standard 4.7 V power supply. An example of technical implementation involves connecting the Hall sensor directly to the microcontroller outputs and (if necessary) periodically turning it on for measurement.…”

Section: Resultsmentioning

confidence: 99%

Technologies and means of protection in process of managing pumping stations

2023

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This paper aims to analyze automatic protection and control measures at pump stations in the event of constant accumulation of groundwater and water dripping from the pump, leading to flooding in the pump station engine room. To prevent this, the pumping station's machine room should monitor the level of groundwater and water leaks from the pump and, promptly, automatically remove excess water with a pump. The excess water is collected in special reservoirs. From these, the ERSU series sensor, which is based on a contact electrode controller, does not allow it to constantly monitor the level in the storage tank within the required limits; therefore, as a completely automated system, it is unstable and cannot support the regulatory requirements for preventing it from starting one of its technical operations. The article discusses the positive aspects of technical solutions and experimental work in the DRV5023 IC with MSP430G2131 controller and no more than 2.7 mA consumer, NE555 IC-based timer and pump mode, stable contactless sensor, sensor-based automatic monitoring, and pumping system. The results are given. (12-17 seconds.) Preparation to start the pumping process is also a standard 4.7 V. power supply circuit. The work is based on production experience and is innovative.

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Section: Resultsmentioning

confidence: 99%

Technologies and means of protection in process of managing pumping stations

2023

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Development of an algorithm for optimization of continuous technological process of cultivation of microorganisms

et al. 2021

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When implementing the tasks of controlling technological processes, finding the optimal control actions, and creating control algorithms that implement the optimal modes of technological processes, it is necessary to present the criterion of optimality in the form of a goal function, the extremum of which best meets the purpose of this object and expressed as - Relevant technical and economic indicators. The criterion of optimality should be an integral indicator that reflects the main aspects of production. Profit is most often taken as such a criterion for typical microbiological industries - as the most generalized indicator, reflecting almost all aspects of the enterprise. Possible criteria of optimality are analyzed in the form of technical and economic indicators of the process of cultivation of microorganisms, the extremum of which best meets the objectives of production and reflects the main aspects of the functioning of the control object. The analysis of possible modes of microalgae cultivation has been carried out. Two optimization algorithms are substantiated. The first one is based on random search method with an absolute bias, an algorithm for optimizing the process of cultivating microorganisms with continuous regeneration of the flow in one cultivator. The second is an algorithm for determining the optimal residence time of chlorella particles in multistage cultivators, focused on the method of dynamic programming implemented in Wellman's recurrence relation. The developed algorithm for operational forecasting and automatic control of the chlorella cultivation process allows, under given production conditions and the composition of nutrients, to increase the productivity of technological equipment and improve the quality of the target product, as well as to prevent in advance various unforeseen and emergency production situations.

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Implementation of the developed models and algorithms in problems of control of the process of culturing of chlorella

Rakhmanov

Turaev

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The article considers the implementation of mathematical models and algorithms for hanging the efficiency of managing the chlorella cultivation process on the basis of the modeling algorithm of state parameters. One of the necessary conditions for the optimal conduct of the process of cultivating microorganisms is automatic control of the quality and composition of nutrients at the inlet, as well as control of the output indicators of the process. Based on the results of theoretical and experimental studies performed using modern methods and tools, as well as the positive results of industrial tests, it is possible to increase the efficiency of controlling the chlorella cultivation process on the basis of a modeling algorithm for state parameters.

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Mathematical modelling of the hydrodynamic structure of flows in the apparatus for cultivating chlorella: Parametric identification of the mathematical model

Cited by 3 publications

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Technologies and means of protection in process of managing pumping stations

Technologies and means of protection in process of managing pumping stations

Development of an algorithm for optimization of continuous technological process of cultivation of microorganisms

Implementation of the developed models and algorithms in problems of control of the process of culturing of chlorella

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