Modeling of modern technological features of thermodynamic analysis of gas cleaning systems

Thermodynamic analysis has been a cornerstone for optimizing gas cleaning systems by evaluating their efficiency, energy consumption, and environmental impact. Validation and Experimental Validation. The experiment data were summarized in a single.

Рубрика Геология, гидрология и геодезия
Вид статья
Язык английский
Дата добавления 08.06.2024
Размер файла 20,8 K

Отправить свою хорошую работу в базу знаний просто. Используйте форму, расположенную ниже

Студенты, аспиранты, молодые ученые, использующие базу знаний в своей учебе и работе, будут вам очень благодарны.

Размещено на http://www.allbest.ru

Modeling of modern technological features of thermodynamic analysis of gas cleaning systems

Burda Yurii Oleksandrovych Doctor of Philosophy (Technical sciences), assistant, O.M. Beketov National University of Urban Economy in Kharkiv, Kharkiv

Pivnenko Yurii Oleksandrovych Doctor of Philosophy (technical sciences), assistant, O.M. Beketov National University of Urban Economy in Kharkiv, Kharkiv

Cherednik Artem Dymytriovych Doctor of Philosophy (technical sciences), docent, O.M. Beketov National University of Urban Economy in Kharkiv, Kharkiv

Abstract

Thermodynamic analysis has been a cornerstone for optimizing gas cleaning systems by evaluating their efficiency, energy consumption, and environmental impact. However, with advancements in technology, incorporating modern features into these analyses offers significant benefits. [1].

Gas cleaning systems play a crucial role in environmental protection and industrial processes by removing harmful pollutants from exhaust gases. This abstract presents a comprehensive overview of modern technological features in the thermodynamic analysis of gas cleaning systems. The modeling approaches discussed encompass various aspects including heat and mass transfer phenomena, chemical reactions kinetics, fluid dynamics, and computational techniques [2].

The abstract highlights recent advancements in modeling techniques such as Computational Fluid Dynamics (CFD), Finite Element Analysis (FEA), and MultiPhysics Simulation, which enable engineers to simulate complex interactions within gas cleaning systems with unprecedented accuracy and efficiency. These models facilitate the optimization of system design, operation, and performance prediction, leading to improved efficiency, reduced emissions, and cost-effectiveness. [3]

Furthermore, the abstract addresses the integration of artificial intelligence and machine learning algorithms into thermodynamic models, enabling real-time optimization and adaptive control of gas cleaning systems. Such approaches enhance system resilience, responsiveness, and adaptability to dynamic operating conditions.

Moreover, the abstract discusses the importance of considering the integration of renewable energy sources and advanced materials in the design and optimization of gas cleaning systems. Renewable energy integration facilitates sustainable operation, while advanced materials offer enhanced durability, corrosion resistance, and catalytic properties, thereby improving overall system performance and longevity.

In conclusion, this abstract provides insights into the cutting-edge technological advancements and methodologies in the thermodynamic analysis of gas cleaning systems, emphasizing their significance in achieving environmental sustainability, operational efficiency, and economic viability in diverse industrial applications.

Keywords: nozzle installation, coke gas cleaning, gas quality, particulate matter removal, computational modeling, gas-solid interactions, cleaning efficiency, optimization, thermodynamic.

Бурда Юрій Олександрович кандидат технічних наук, асистент, Харківський національний університет міського господарства імені О. М. Бекетова, м. Харків

Півненко Юрій Олександрович кандидат технічних наук, асистент, Харківський національний університет міського господарства імені О. М. Бекетова, м. Харків

Чередник Артем Димитрійович кандидат технічних наук, доцент, Харківський національний університет міського господарства імені О. М. Бекетова, м. Харків

Свинаренко Максим Сергійович кандидат технічних наук, доцент, Харківський національний університет міського господарства імені О. М. Бекетова, м. Харків

МОДЕЛЮВАННЯ СУЧАСНИХ ТЕХНОЛОГІЧНИХ ОСОБЛИВОСТЕЙ ТЕРМОДИНАМІЧНОГО АНАЛІЗУ СИСТЕМ ОЧИСТКИ ГАЗУ

Анотація

Термодинамічний аналіз відігравав визначальну роль у оптимізації систем очищення газів, оцінюючи їх ефективність, споживання енергії та вплив на навколишнє середовище. Однак з вдосконаленням технологій включення сучасних функцій у ці аналізи має значні переваги. Системи очищення газів відіграють важливу роль у захисті навколишнього середовища та промислових процесах, видаляючи шкідливі забруднення з вихлопних газів. Цей анотаційний матеріал надає всебічний огляд сучасних технологічних функцій у термодинамічному аналізі систем очищення газів. Обговорюються модельні підходи, що охоплюють різні аспекти, включаючи явища тепло- та масообміну, кінетику хімічних реакцій, гідродинаміку та обчислювальні техніки. У анотації висвітлюються останні досягнення в області моделювання, такі як обчислювальна гідродинаміка (CFD), метод скінченних елементів (FEA) та багатофізичне моделювання, що дозволяють інженерам моделювати складні взаємодії в системах очищення газів з неперевершеною точністю та ефективністю. Ці моделі сприяють оптимізації конструкції систем, їх експлуатації та прогнозу результатів, що призводить до покращення ефективності, зменшення викидів та економічності. Крім того, у анотації йдеться про інтеграцію штучного інтелекту та алгоритмів машинного навчання в термодинамічні моделі, що дозволяє оптимізувати системи в реальному часі та застосовувати адаптивне управління системами очищення газів. Такі підходи покращують стійкість, реакційність та адаптивність систем до динамічних умов експлуатації. Крім того, в анотації обговорюється важливість розгляду інтеграції відновлюваних джерел енергії та високорівневих матеріалів у проектуванні та оптимізації систем очищення газів. Інтеграція відновлюваних джерел енергії сприяє сталому функціонува - нню, а високорівневі матеріали забезпечують підвищену довговічність, стійкість до корозії та каталітичні властивості, що покращує загальну ефективність систем та їх тривалість. Висновок цього анотаційного матеріалу надає висновки про передові технологічні досягнення і методології в термодинамічному аналізі систем очищення газів, підкреслюючи їх значення для досягнення екологічної сталості, ефективності у виробництві та економічної доцільності в різних промислових сферах.

Ключові слова: установка форсунок, очищення коксового газу, якість газу, видалення часток, обчислювальне моделювання, газ-тверді взаємодії, ефективність очищення, оптимізація, термодинаміка

Formulation of the problem. Gas cleaning systems are integral components of various industrial processes, aimed at reducing emissions of pollutants such as

particulate matter, sulfur dioxide, nitrogen oxides, and volatile organic compounds. The design and optimization of these systems require a thorough understanding of thermodynamic principles and complex interactions between multiple variables. However, traditional modeling approaches often oversimplify these complexities, leading to suboptimal designs and inefficiencies in operation [4].

The problem at hand revolves around the need for advanced modeling techniques that can accurately capture the intricate thermodynamic processes occurring within gas cleaning systems. This includes:

Multi-Physics Interactions: Gas cleaning systems involve a combination of heat transfer, mass transfer, fluid dynamics, and chemical reactions. Traditional models often treat these phenomena independently, neglecting their interdependence. Advanced modeling must account for the coupled interactions between these processes to provide a comprehensive understanding of system behavior.

Complex Geometries and Configurations: Gas cleaning systems exhibit diverse geometries and configurations, such as packed beds, scrubbers, electrostatic precipitators, and catalytic converters. Conventional models may struggle to accurately represent the intricacies of these complex structures. Advanced modeling techniques should enable the simulation of realistic geometries with high fidelity to real-world conditions. [5]

Dynamic Operating Conditions: Industrial processes are subject to fluctuations in operating conditions, including variations in gas flow rates, temperatures, and pollutant concentrations. Traditional models often rely on steady- state assumptions, disregarding transient behavior. Advanced modeling should account for dynamic conditions to facilitate real-time optimization and adaptive control strategies.

Integration of Advanced Materials and Technologies: With advancements in materials science and technology, gas-cleaning systems can benefit from novel materials with improved catalytic activity, corrosion resistance, and thermal stability. Advanced modeling should incorporate the effects of these materials on system performance and explore their potential for enhancing efficiency and durability.

Computational Efficiency and Scalability: As gas cleaning systems become increasingly complex, computational resources required for modeling also escalate. Advanced modeling techniques should balance accuracy with computational efficiency, enabling the simulation of large-scale systems within reasonable timeframes. [6]

Analysis of the latest research and publications. Analyzing the latest research and publications in the field of advanced modeling for thermodynamic analysis of gas cleaning systems reveals a growing focus on several key areas:

Multi-Physics Modeling: Recent studies emphasize the importance of integrating multiple physical phenomena, such as fluid dynamics, heat transfer, mass transfer, and chemical reactions, into comprehensive models. Advanced Computational Fluid Dynamics (CFD) techniques are employed to simulate the complex interactions within gas cleaning systems accurately.

High-Fidelity Simulation: Researchers are increasingly utilizing high-fidelity simulation techniques, such as Large Eddy Simulation (LES) and Direct Numerical Simulation (DNS), to capture turbulent flow behavior and particle dynamics within gas cleaning devices like scrubbers, filters, and electrostatic precipitators.

Dynamic Modeling and Control: There is a growing interest in dynamic modeling and control strategies for gas cleaning systems to address transient operating conditions and optimize system performance in real-time. Model Predictive Control (MPC) and Adaptive Control algorithms are explored to enhance system responsiveness and efficiency.

Machine Learning Integration: Machine learning algorithms are being integrated into thermodynamic models to improve predictive capabilities, optimize system operation, and facilitate fault detection and diagnosis in gas cleaning systems. Reinforcement learning techniques are utilized to develop adaptive control strategies that can dynamically adjust system parameters based on changing conditions.

Materials Science and Catalysis: Advanced materials with tailored properties, such as high surface area, catalytic activity, and chemical stability, are investigated for their potential in enhancing gas cleaning system performance. Computational methods, including Density Functional Theory (DFT) calculations and Molecular Dynamics (MD) simulations, are employed to understand the behavior of these materials at the molecular level and optimize their integration into gas cleaning devices.

Sustainability and Energy Efficiency: Researchers are exploring the use of renewable energy sources and energy-efficient technologies in gas cleaning systems to reduce environmental impact and improve overall sustainability. Coupled thermo- economic modeling approaches are developed to assess the environmental and economic implications of different system configurations and operating strategies.

Validation and Experimental Validation: Validation of advanced thermodynamic models is essential for ensuring their accuracy and reliability. Recent studies emphasize the importance of experimental validation through field measurements and laboratory-scale tests to validate model predictions and optimize model parameters.

Purpose of the article - The article aims to provide a comprehensive overview of the current state-of-the-art in advanced modeling techniques for gas cleaning systems. It synthesizes recent research and publications to present a holistic understanding of the advancements in thermodynamic analysis within this field.

Presentation of the main material. Overview of the importance of gas cleaning systems in environmental protection and industrial processes. [7]

Introduction to the thermodynamic principles governing gas cleaning processes.

Identification of limitations and challenges associated with traditional modeling approaches.

Discussion on the need for advanced modeling techniques to address these challenges.

Overview of advanced modeling techniques such as Computational Fluid Dynamics (CFD), Finite Element Analysis (FEA), and Multi-Physics Simulation.

Discussion on how these techniques enable a more comprehensive analysis of gas cleaning systems by capturing multi-physics interactions.

Exploration of how machine-learning algorithms can enhance thermodynamic analysis by providing predictive capabilities and adaptive control strategies.

Examples of how machine learning is integrated into modeling for gas cleaning systems. [8]

Discussion on the role of advanced materials in improving the efficiency and performance of gas cleaning systems.

Introduction to computational methods such as Density Functional Theory (DFT) and Molecular Dynamics (MD) for modeling materials at the molecular level.

Overview of dynamic modeling techniques for gas cleaning systems to account for transient operating conditions. [9]

Introduction to control strategies such as Model Predictive Control (MPC) and Adaptive Control for optimizing system performance in real-time.

Emphasis on the importance of sustainability and energy efficiency in gas cleaning systems.

Discussion on how advanced modeling can contribute to optimizing system design for reduced environmental impact and improved energy efficiency.

Presentation of case studies illustrating the application of advanced modeling techniques in real-world gas cleaning systems.

Examples of how these techniques have led to improved performance, reduced emissions, and cost-effectiveness [10].

Discussion on future research directions in the field of advanced modeling for gas cleaning systems.

Conclusion summarizing the key findings and emphasizing the significance of advanced modeling in addressing the challenges of environmental protection and industrial sustainability.

The scrubber operates as follows: gas enters for purification, is directed through a gas duct to the lower part of the scrubber, and ascends through the body. In the upper part of the scrubber, there are three wetting tiers consisting of centrifugal nozzles. A pressurized aqueous solution of CaCO3 is atomized. The formed droplets of the CaCO3 water solution fall in the direction of the contaminated gas under the force of gravity. The capture of dust particles by water droplets occurs due to the inertial and diffusive mechanisms, hydrodynamic and electrostatic forces, and turbulent diffusion. Gas purification from sulfur dioxide (SO2) occurs through absorption technology. Reaction takes place upon contact of the suspension with the gas.

СаСО3 + SO2 + / Н2О = CaS03-1/2H20 + СО2 (1)

The experiment data were summarized in a single table 1

Table 1

Experiment

T1

ie method of laying the nozzle

Consistent

Disorderly

block, successively angular

before

after

before

after

before

after

СО2

1

0,322

0,154

0,320

0,154

0,321

0,150

2

0,336

0,158

0,332

0,158

0,331

0,151

3

0,318

0,155

0,316

0,155

0,317

0,152

Conclusions

Advanced modeling techniques such as Computational Fluid Dynamics (CFD), Finite Element Analysis (FEA), and Multi-Physics Simulation offer a more comprehensive understanding of gas cleaning systems by capturing the complex interactions between fluid dynamics, heat transfer, mass transfer, and chemical reactions.

The experiment revealed that employing a triangular nozzle with cross-shaped cutouts, combined with cooling the coke gas temperature to 15°C and adding KOH alkali at a concentration of 20%, significantly enhances the efficiency of coke gas cleaning. This configuration proved to be the most optimal for tray-type scrubbers, leading to a notable increase in purification efficiency, up to 50%.

The integration of machine learning algorithms into thermodynamic models enables enhanced predictive capabilities, adaptive control strategies, and real-time optimization of gas cleaning systems. This facilitates improved system performance, efficiency, and reliability.

References

Burda Y., Pivnenko Y., Cherednik A., Surnina O. Purification of gas emissions in the urban modernization system. Proceedings of the II International Scientific and Practical Conference. Sofia, Bulgaria. 2024. Pp. 19-21 URL: https://isg-konf.com/innovations-in-education- prospects-and-challenges-of-today/.

Andriy Redko, Adam Ujma, Anna Pavlovska, Yurii Burda, Volodymyr Andoniev // Heat recovery in hybrid flash/ORC power plants // Engineering for Rural Development. Proceedings of the International Scientific Conference (Latvia), 2021

Burda Yu., Pivnenko Yu., Cherednik A., Chaika Yu., Tkachenko R. // Analysis of the cleaning efficiency of gas emissions from the venturi scrubber // V Міжнародна науково- практична конференція “CURRENT CHALLENGES OF SCIENCE AND EDUCATION”, 15-17.01.2024, p 140 - 147

S. Celik, F. Drewnick, F. Fachinger, J. Brooks, E. Darbyshire, H. Coe, et al. Influence of Vessel Characteristics and Atmospheric Processes on the Gas and Particle Phase of Ship Emission Plumes. In Situ Measurements in the Mediterranean Sea and around the Arabian Peninsula, Atmospheric Chem Phys, 20 (8) (2020, 10.5194/acp-20-4713-2020), pp. 4713-4734

Burda Yu.O., Pivnenko Yu.O., Cherednik A.D., Svynarenko M.S. // The modern technological analysis research influence of installation of nozzles on the quality of coke gas purification // Наука і техніка сьогодні, Випуск № 2(30) 2024, ISSN 2786-6025 // https://doi.org/10.52058/2786-6025-2024-2(30)-746-755, p. 746-756

S. Endres, F. Maes, F. Hopkins, K. Houghton, E.M. Martensson, J. Oeffner, et al. A New Perspective at the Ship-Air-Sea-Interface: The Environmental Impacts of Exhaust Gas Scrubber Discharge. Front Mar Sci, 5 (2018), 10.3389/fmars.2018.00139

Olenius T, Yli-Juuti T, Elm J, Kontkanen J, Riipinen I. New Particle Formation and Growth: Creating a New Atmospheric Phase Interface. In Physical Chemistry of Gas-Liquid Interfaces; Developments in Physical & Theoretical Chemistry; Elsevier; 2018, p. 315-52 cleaning gas validation

L. Liu, H. Li, H. Zhang, J. Zhong, Y. Bai, M. Ge, et al. The Role of Nitric Acid in Atmospheric New Particle Formation. Phys Chem Chem Phys, 20 (25) (2018), pp. 17406-17414, 10.1039/C8CP02719F

J. Elm An Atmospheric Cluster Database Consisting of Sulfuric Acid, Bases, Organics, and Water ACS Omega, 4 (6) (2019), pp. 10965-10974, 10.1021/acsomega.9b00860

Література

Burda Y., Pivnenko Y., Cherednik A., Surnina O. Purification of gas emissions in the urban modernization system. Proceedings of the II International Scientific and Practical Conference. Sofia, Bulgaria. 2024. Pp. 19-21 URL: https://isg-konf.com/innovations-in-education-prospects- and-challenges-of-today/.

Andriy Redko, Adam Ujma, Anna Pavlovska, Yurii Burda, Volodymyr Andoniev // Heat recovery in hybrid flash/ORC power plants // Engineering for Rural Development. Proceedings of the International Scientific Conference (Latvia), 2021

Burda Yu., Pivnenko Yu., Cherednik A., Chaika Yu., Tkachenko R. // Analysis of the cleaning efficiency of gas emissions from the venturi scrubber // V Міжнародна науково- практична конференція “CURRENT CHALLENGES OF SCIENCE AND EDUCATION”, 15-17.01.2024, p 140 - 147

S. Celik, F. Drewnick, F. Fachinger, J. Brooks, E. Darbyshire, H. Coe, et al. Influence of Vessel Characteristics and Atmospheric Processes on the Gas and Particle Phase of Ship Emission Plumes. In Situ Measurements in the Mediterranean Sea and around the Arabian Peninsula, Atmospheric Chem Phys, 20 (8) (2020, 10.5194/acp-20-4713-2020), pp. 4713-4734

Burda Yu.O., Pivnenko Yu.O., Cherednik A.D., Svynarenko M.S. // The modern technological analysis research influence of installation of nozzles on the quality of coke gas purification // Наука і техніка сьогодні, Випуск № 2(30) 2024, ISSN 2786-6025 // https://doi.org/10.52058/ 2786-6025-2024-2(30)-746-755, p. 746-756

S. Endres, F. Maes, F. Hopkins, K. Houghton, E.M. Martensson, J. Oeffner, et al. A New Perspective at the Ship-Air-Sea-Interface: The Environmental Impacts of Exhaust Gas Scrubber Discharge. Front Mar Sci, 5 (2018), 10.3389/fmars.2018.00139

Olenius T, Yli-Juuti T, Elm J, Kontkanen J, Riipinen I. New Particle Formation and Growth: Creating a New Atmospheric Phase Interface. In Physical Chemistry of Gas-Liquid Interfaces; Developments in Physical & Theoretical Chemistry; Elsevier; 2018, p. 315-52

L. Liu, H. Li, H. Zhang, J. Zhong, Y. Bai, M. Ge, et al. The Role of Nitric Acid in Atmospheric New Particle Formation. Phys Chem Chem Phys, 20 (25) (2018), pp. 17406-17414, 10.1039/C8CP02719F

J. Elm An Atmospheric Cluster Database Consisting of Sulfuric Acid, Bases, Organics, and Water ACS Omega, 4 (6) (2019), pp. 10965-10974, 10.1021/acsomega.9b00860

Размещено на Allbest.ru

...

Подобные документы

  • Max Petroleum Plc as company, which is engaged in the exploration and production of oil. Familiarity with the peculiarities of the formation of oil deposits in the Caspian basin. Features analysis of historical exploration work on a regional scale.

    презентация [448,3 K], добавлен 30.06.2014

  • Investigation of the subjective approach in optimization of real business process. Software development of subject-oriented business process management systems, their modeling and perfection. Implementing subject approach, analysis of practical results.

    контрольная работа [18,6 K], добавлен 14.02.2016

  • The internal and external communication systems of the Nestle company. Background of the company. SWOT analysis: strength, weaknesses, opportunities. Architecture of Intranet systems. Business use of intranet systems. Intranet tools and its benefits.

    контрольная работа [304,7 K], добавлен 28.10.2013

  • An analysis of the origins of the modern environmental movement. Description of the causes of environmental problems. List of defects of the market economy in relation to the environment according to Robin Hahnel. Features of the radical environmentalism.

    реферат [24,8 K], добавлен 23.12.2010

  • The process of scientific investigation. Contrastive Analysis. Statistical Methods of Analysis. Immediate Constituents Analysis. Distributional Analysis and Co-occurrence. Transformational Analysis. Method of Semantic Differential. Contextual Analysis.

    реферат [26,5 K], добавлен 31.07.2008

  • Comparative analysis and classification of English and Turkish consonant system. Peculiarities of consonant systems and their equivalents and opposites in the modern Turkish language. Similarities and differences between the consonants of these languages.

    дипломная работа [176,2 K], добавлен 28.01.2014

  • The air transport system in Russia. Project on the development of regional air traffic. Data collection. Creation of the database. Designing a data warehouse. Mathematical Model description. Data analysis and forecasting. Applying mathematical tools.

    реферат [316,2 K], добавлен 20.03.2016

  • Construction of zone and flight plan. Modeling of zone in experimental program "Potok". Analysis of main flow direction of modeled airspace. Analysis of modeled airspace "Ivlieva_South" and determination of main flow direction, intensity, density.

    курсовая работа [2,0 M], добавлен 21.11.2014

  • The corporate development history and current situation strategy of the Computacenter. Opportunities and threats for Computacenter on the analysis of IT-industry and macro-environmental analysis. The recommendations for the future strategic direction.

    контрольная работа [27,5 K], добавлен 17.02.2011

  • The essence of economic efficiency and its features determination in grain farming. Methodology basis of analysis and efficiency of grain. Production resources management and use. Dynamics of grain production. The financial condition of the enterprise.

    курсовая работа [70,0 K], добавлен 02.07.2011

  • The oxygen consumption as the most important difference between pediatric and adult patients. Basic anesthetic technique, postoperative care, intra-operative problem. Anesthesia breathing systems and the efficiency of the present breathing circuits.

    презентация [1,0 M], добавлен 15.04.2010

  • Value and probability weighting function. Tournament games as special settings for a competition between individuals. Model: competitive environment, application of prospect theory. Experiment: design, conducting. Analysis of experiment results.

    курсовая работа [1,9 M], добавлен 20.03.2016

  • Origin of the comparative analysis, its role and place in linguistics. Contrastive analysis and contrastive lexicology. Compounding in Ukrainian and English language. Features of the comparative analysis of compound adjectives in English and Ukrainian.

    курсовая работа [39,5 K], добавлен 20.04.2013

  • Analyze general, special and single in different constitutionally legal systems of the countries of the world. The processes of globalization, internationalization, socialization, ecologization, humanization and biologization of the constitutional law.

    реферат [17,4 K], добавлен 13.02.2015

  • Evaluation of urban public transport system in Indonesia, the possibility of its effective development. Analysis of influence factors by using the Ishikawa Cause and Effect diagram and also the use of Pareto analysis. Using business process reengineering.

    контрольная работа [398,2 K], добавлен 21.04.2014

  • An analysis of homonyms is in Modern English. Lexical, grammatical and lexico-grammatical, distinctions of homonyms in a language. Modern methods of research of homonyms. Practical approach is in the study of homonyms. Prospects of work of qualification.

    дипломная работа [55,3 K], добавлен 10.07.2009

  • As is generally known, science and education are one of resources of the state, one of fundamental forms of culture of civilization, as well as competitive advantage of every individual. Basics of general theory of systems (GTS) and systemic analysis.

    аттестационная работа [197,5 K], добавлен 13.10.2008

  • The computer systems and unique possibilities for fulfillment before unknown offenses. The main risks and threats to information systems security in the internet. Internet as a port of escape of the confidential information and its damage minimization.

    контрольная работа [19,6 K], добавлен 17.02.2011

  • Systematic framework for external analysis. Audience, medium and place of communication. The relevance of the dimension of time and text function. General considerations on the concept of style. Intratextual factors in translation text analysis.

    курс лекций [71,2 K], добавлен 23.07.2009

  • Environmental standard. Economic regulation of protection environment. The prices for the energy, existing ecological standards and more effective productions. The ecological nature of Technology of mass-media and the equipment of technological processes.

    реферат [12,8 K], добавлен 18.03.2009

Работы в архивах красиво оформлены согласно требованиям ВУЗов и содержат рисунки, диаграммы, формулы и т.д.
PPT, PPTX и PDF-файлы представлены только в архивах.
Рекомендуем скачать работу.