Numerical investigation of the receiver in linear Fresnel concentrators using computational fluid dynamics (CFD)

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 587, P. 04009 - 04009

Published: Jan. 1, 2024

This paper presents a comprehensive Computational Fluid Dynamics (CFD) analysis conducted to evaluate the thermal performance and efficiency of receiver in linear Fresnel concentrator system. The receiver, crucial component concentrating solar power (CSP) technology, absorbs concentrated radiation converts it into usable energy. By employing CFD simulations, complex fluid flow heat transfer phenomena within are investigated, considering factors such as dynamics, convective transfer, losses. study explores new design parameters operational conditions optimize receiver's performance, aiming enhance energy conversion minimize Boundary were examined for an ambient temperature 293.15 K 800 W/m 2 . Inlet velocities changed from 0.2 m/s 0.5 thermophysical absorber concentrator. results offer valuable insights behavior facilitating informed decisions advancements technology sustainable applications.

Language: Английский

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Method of assessment of structural properties of knitted fabrics based on image analysis

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 587, P. 03020 - 03020

Published: Jan. 1, 2024

A novel digital image processing technique was devised to assess fabric structure attributes and identify weave patterns using a Wiener filter. Six distinct groups of images were acquired subjected analysis, encompassing three structures with two constructions each. The developed method segregated the into components, one containing warp yarns other weft yarns. By delineating yarn boundaries, fabric’s surface characteristics assessed, aiding in identification interlacing regions discern structure. findings demonstrated proficiency evaluating discerning structures, particularly for fabrics identical colors. Furthermore, approach provided more precise assessment spacing cover factor compared conventional analytical techniques employed such evaluations.

Language: Английский

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Handwritten signature preprocessing for off-line recognition systems

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 587, P. 03019 - 03019

Published: Jan. 1, 2024

In the process of handwritten signature recognition, preliminary processing is an important step before identifying informative features. The signatures one person always have some differences, in addition, they can be different colors, sizes and orientations. Once are digitized, their images may contain noise. purpose a image to obtain most invariant representation digital person’s signature, which will allow him identified or establish that forged.

Language: Английский

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Efficiency of using a solar air heating collector in a continental climate

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 592, P. 01014 - 01014

Published: Jan. 1, 2024

This article presents a comprehensive technical and economic analysis of the implementation solar air collectors (SAC) in Fergana region Republic Uzbekistan. Characterized by continental climate, enjoys remarkable abundance resources, with sunshine durations reaching between 2900 to 3100 hours annually. The text delves into region’s climatic conditions, focusing on key metrics such as average annual temperature, total radiation, extent hours. By assessing operational efficiency SAC under varying circumstances specific areas like Fergana, Kokand, Shakhimardan, study provides valuable insights potential energy solutions. research represents significant advancement promoting renewable sources region, highlighting their importance means reduce reliance traditional systems enhance environmental sustainability. aims encourage stakeholders adopt technologies, fostering transition toward greener, energy-independent

Language: Английский

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Efficiency of the heat sink of a solar air collector based on metal chips

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 592, P. 01005 - 01005

Published: Jan. 1, 2024

I The article discusses the efficiency of heat sinks solar air heater collectors (SAHC), based on use metal shavings as an absorber. Various types shavings, such drainage, chipping and fracture, their effect thermal SAHC are studied. results studies various designs heaters using comparative advantages compared to traditional flat presented. principles operation with absorber configurations, including corrugated surfaces small outlined, design features for increasing installations described. Calculation methods experimental data presented that confirm increase in due contact area improved transfer. main parameters influencing SAHC, body size, tilt angle, ambient temperature properties transparent coating, considered. Calculations analyses have been carried out showing optimal opening angles combination a surface significantly improve absorption capacity transfer heating system, which helps overall systems.

Language: Английский

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Evaluation of the performance of heat sinks using metal shavings

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 592, P. 01004 - 01004

Published: Jan. 1, 2024

This article examines the efficiency of heat sinks solar air collectors (SAC) using metal shavings as an absorber. The main attention is paid to different types and their natural colors that are formed during processing. results experiments determine heating temperature colors, grouped into light dark shades, presented. studies were carried out under real conditions in heliostat section a large furnace. Experimental data showed shades chips (dark blue, slate violet) have higher compared (pale yellow, yellow white). also discusses methods for measuring calculating indicators chips, including colorimetric optical methods. obtained indicate significant influence color on thermal SAC. dependences flow various given conclusions drawn about these factors

Language: Английский

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