In this thesis an apparatus is designed which enables the testing of thermal power plant boiler tubes against erosion. The apparatus makes use of a tube sample directly cut from the boiler tubes and simulates conditions similar to those prevailing in boilers in lignite fired power plants. The apparatus is composed of three components / a furnace for heating the sample, a loading system which allows application of tensile stresses while allowing the rotation of the sample, and a particle blower that delivers abrasive particles to the surface of the sample. The abrasive material used in the test is mixture of oxides, 90% of which is Al2O3 and the average particle size is approximately 300 &micro / m. The unit as designed would allow testing of boiler tubes up to a temperature of 650 C, and particle velocity of up to 50 m/s. The apparatus as tested at room temperatures for four identical samples have yielded very similar erosion values based on measurement of weight loss. At elevated temperature, erosion could be measured by a thickness loss since the oxidation that occurs complicates the erosion measurement. Two economizer material / P235GH and 16Mo3 were tested at 500oC with particle velocity of 10 m/s. The testing has shown that 16Mo3 has better performance than P235GH, the erosion rate differing by 20 percent.

Ingenieros Ejecutores (IE) es una empresa que busca diversificar y hacer sostenible su cartera de negocios con la incursión y sostenibilidad en el sector construcción de Obras Civiles para obras energéticas. Para este importante objetivo es necesario que los contratos ya ganados apliquen las mejores y más modernas prácticas de la industria, que reducirán los riesgos sobre los compromisos asumidos ante su Cliente. En este contexto, en el presente proyecto de investigación, se desarrolla el Plan para la dirección del proyecto “Construcción de las Obras Civiles Central Térmica Recka II” aplicando las buenas prácticas de la Guía del PMBOK ® sexta edición, en Chiclayo para las fases de iniciación y planificación del proyecto. El Plan para la dirección del proyecto se ha desarrollado en base a los planes subsidiarios que son: Plan para la Gestión del Alcance, Plan para la Gestión del Cronograma, Plan para la Gestión del Costo, Plan para la Gestión de los Recursos, Plan para la Gestión de las Comunicaciones, Plan para la Gestión de los Riesgos, Plan para la Gestión de los Interesados, así como otras herramientas como EDT / WBS, Cronograma y Presupuesto como parte de la aplicación de los procesos y herramientas. La aplicación de estos planes se espera que brinde como consecuencia el éxito del presente proyecto, el cual permitirá a IE acercarse a sus objetivos, alcanzando los beneficios esperados para los interesados. / Ingenieros Ejecutores (IE) is a company that seeks to diversify and make its business portfolio sustainable with the incursion and sustainability in the Civil Works construction sector for energy works. For this important objective it is necessary that the contracts already won apply the best and most modern practices of the industry, which will reduce the risks on the commitments assumed before your Client. In this context, in the present research project, the Plan for the direction of the “Construction of Civil Works Thermal Power Plant Recka II” project is developed, applying the good practices of the Guide of the PMBOK ® sixth edition, on Chiclayo, for the phases of initiation and Project planning. The Project Management Plan has been developed based on the subsidiary plans that are: Integration Management Plan, Scope Management Plan, Schedule Management Plan, Cost Management Plan, Plan for Resource Management, Communications Management Plan, Risk Management Plan, Stakeholder Management Plan, as well as other tools such as EDT / WBS, Schedule and Budget as part of the process application and tools The implementation of these plans is expected to result in the success of this project, which will allow IE to approach its objectives, achieving the expected benefits for those interested. / Trabajo de investigación

O planejamento da operação energética em sistemas hidrotérmicos de potência com um único reservatório tem como objetivo determinar a participação de usinas hidrelétricas e térmicas de forma a garantir o suprimento de energia demandada ao menor custo operacional possível, dentro de restrições físicas e técnicas do modelo. Alguns fatores tornam a solução deste problema bastante complexa destacando a não linearidade e a não separabilidade temporal aditiva. O objetivo deste trabalho é apresentar uma nova abordagem com tratamento agregado das afluências, descrevendo uma nova caracterização das distribuições de probabilidades e um novo modelo para a programação dinâmica estocástica markoviana. Nesse novo modelo da programação dinâmica estocástica markoviana, agregações plurimensais de vazões são utilizadas como entrada em um modelo de programação dinâmica estocástica markoviana modificado para discretizações temporais plurimensais. A nova abordagem proposta foi simulada em diferentes usinas hidrelétricas brasileiras localizadas em diferentes regiões geográficas e sob diferentes regimes hidrológicos. Os resultados das simulações feitas com a utilização deste novo modelo são apresentados e comparados ao modelo de programação dinâmica estocástica markoviana mensal, atualmente utilizado no setor elétrico brasileiro, com economia de custos relativas superiores a 10% em alguns casos. / The energetic operation planning on hydrothermal power systems with a single reservoir aims to determine the participation of hydroelectric power plants and thermal power plants to guaranty supply of energy demanded with the smallest possible cost, under physical and technical model boundaries. Some points became the solution of this problem complex, highlighting the non linearity and the additive non time separability. The objective of this paper is show the new approach with aggregated inflows, describing a new probability distributions featuring and a new model for the markovian stochastic dynamic programming. On this new model of markovian stochastic dynamic programming, multi monthly inflow aggregations are used as input in a model of markovian stochastic dynamic programming modified for multi months discretizations. The new approach proposed was simulated on differents Brazilian hydroelectric power plants located on different regions and under different hydrologic regime. The results of simulations using this new model are presented and compared to the model of monthly markovian dynamic programming, nowadays used on the Brazilian electrical sector, with relatives economic savings up to 10% in some cases.

O planejamento da operação energética em sistemas hidrotérmicos de potência com um único reservatório tem como objetivo determinar a participação de usinas hidrelétricas e térmicas de forma a garantir o suprimento de energia demandada ao menor custo operacional possível, dentro de restrições físicas e técnicas do modelo. Alguns fatores tornam a solução deste problema bastante complexa destacando a não linearidade e a não separabilidade temporal aditiva. O objetivo deste trabalho é apresentar uma nova abordagem com tratamento agregado das afluências, descrevendo uma nova caracterização das distribuições de probabilidades e um novo modelo para a programação dinâmica estocástica markoviana. Nesse novo modelo da programação dinâmica estocástica markoviana, agregações plurimensais de vazões são utilizadas como entrada em um modelo de programação dinâmica estocástica markoviana modificado para discretizações temporais plurimensais. A nova abordagem proposta foi simulada em diferentes usinas hidrelétricas brasileiras localizadas em diferentes regiões geográficas e sob diferentes regimes hidrológicos. Os resultados das simulações feitas com a utilização deste novo modelo são apresentados e comparados ao modelo de programação dinâmica estocástica markoviana mensal, atualmente utilizado no setor elétrico brasileiro, com economia de custos relativas superiores a 10% em alguns casos. / The energetic operation planning on hydrothermal power systems with a single reservoir aims to determine the participation of hydroelectric power plants and thermal power plants to guaranty supply of energy demanded with the smallest possible cost, under physical and technical model boundaries. Some points became the solution of this problem complex, highlighting the non linearity and the additive non time separability. The objective of this paper is show the new approach with aggregated inflows, describing a new probability distributions featuring and a new model for the markovian stochastic dynamic programming. On this new model of markovian stochastic dynamic programming, multi monthly inflow aggregations are used as input in a model of markovian stochastic dynamic programming modified for multi months discretizations. The new approach proposed was simulated on differents Brazilian hydroelectric power plants located on different regions and under different hydrologic regime. The results of simulations using this new model are presented and compared to the model of monthly markovian dynamic programming, nowadays used on the Brazilian electrical sector, with relatives economic savings up to 10% in some cases.

Submitted by Nadir Basilio (nadirsb@uninove.br) on 2018-04-13T17:49:06Z No. of bitstreams: 1 Hernani Tabarelli Matias.pdf: 1127572 bytes, checksum: 065ab8d88caa33ce41de09494ab4b48a (MD5) / Made available in DSpace on 2018-04-13T17:49:06Z (GMT). No. of bitstreams: 1 Hernani Tabarelli Matias.pdf: 1127572 bytes, checksum: 065ab8d88caa33ce41de09494ab4b48a (MD5) Previous issue date: 2017-08-22 / Brazil's energy and electrical matrix is one of the cleanest and most renewable in the world. Its planning and expansion considers factors such as sector performance, economic and social development. Investments in infrastructure that are aligned with the country's development policies as well as the sustainable development of the energy sector are needed. The Mines and Energy’ Ministry foresees significant participation of renewable sources in the energy matrix, but a country's energy system, particularly electric power, must rely on several sources of primary energy for maintenance and stability of the available energy in the transmission networks, because renewable sources are subject to weather and seasonality. Thus, fossil sources such as coal are used in thermoelectric plants and there is a forecast of an increase in the supply of electric energy by this source until the year 2030. This type of energy generation has as main disadvantage the pollution and environmental impact resulting from exploitation, processing and combustion of coal, such as greenhouse gas emissions, fly and bottom ashes, acidification of water resources, among others, due to the quality of the national mineral coal. In this context, the objective of this work is to study the aspects related to sustainability in the generation of electric energy by coal combustion through a unique case study of the Thermoelectric Complex located in south region of Brazil. The choice is justified because it is the largest thermoelectric complex in installed capacity in Brazil. This study has an exploratory and qualitative approach. Documents of the energy sector and environment, reports of the object of study, semi-structured interview with environment worker and a technical visit complete the sources of evidence used in this study that were analyzed the contents and triangulated. The main results of the research are the impacts on the environment, such as groundwater contamination and atmospheric emissions, ash generation and management. Among the benefits found are the development of local companies and suppliers, employment generation and technical and scientific knowledge. It is concluded that a well-structured environmental management system is an important tool so that the pros and cons of this form of electric power generation are communicated and mitigated, besides evidencing the importance of this enterprise for the regional development, since it is an important mover of the local economy. / A matriz energética e elétrica do Brasil é uma das mais limpas e renováveis no mundo. Seu planejamento e expansão consideram fatores, tais como o desempenho setorial, econômico e social. Para tal, são necessários investimentos em infraestrutura que estejam alinhados às políticas de desenvolvimento do país, bem como do desenvolvimento sustentável do setor energético. O Ministério de Minas e Energia prevê a participação expressiva de fontes renováveis na matriz energética, mas o sistema energético, particularmente o elétrico, de um país deve valer-se de fontes diversas de energia primária para manutenção e estabilidade da energia disponível nas redes de transmissão e distribuição, pois as fontes renováveis estão sujeitas às intempéries e sazonalidades. Dessa forma, fontes fósseis como o carvão mineral são utilizadas em usinas termelétricas e há previsão de aumento de oferta de energia elétrica por essa fonte até o ano de 2030. Este tipo de geração de energia tem como principal desvantagem a poluição e impacto ambiental decorrente da exploração, beneficiamento e combustão do carvão mineral, como as emissões de gases do efeito estufa, as cinzas leves e pesadas, acidificação dos recursos hídricos entre outros, devido a qualidade do carvão mineral nacional. Neste contexto, o objetivo deste trabalho é estudar os aspectos relacionados à sustentabilidade na geração de energia elétrica por combustão de carvão mineral, por meio de estudo de caso único do Complexo Termelétrico localizado na região sul do Brasil. A escolha se justifica por ser o maior complexo termelétrico em capacidade instalada no Brasil, da importância econômica para a região e estabilidade do Sistema Interligado Nacional. Este estudo tem caráter exploratório e abordagem qualitativa. Como fontes de evidencias foram realizados o levantamento do referencial teórico, documentos do setor energético e meio ambiente, relatórios do objeto de estudo, entrevista semiestruturada com funcionária do setor de meio ambiente e uma visita técnica. Os dados foram analisados e triangulados para a conclusão do estudo. Como principais resultados da pesquisa estão os impactos ao meio ambiente, tais como a contaminação de águas subterrâneas e emissões atmosféricas, geração de cinzas e sua gestão. Entre os benefícios encontrados destacam-se o desenvolvimento de empresas e fornecedores locais, geração de emprego e conhecimento técnico e cientifico. Conclui-se que um sistema de gestão ambiental bem estruturado é uma ferramenta importante para que os prós e contras dessa forma de geração de energia elétrica sejam comunicados e mitigados, além de evidenciar a importância desse empreendimento para o desenvolvimento regional, pois é um importante movimentador da economia local.

Solar energy is a virtually inexhaustible energy resource, and thus, has great potential in helping meet many of our future energy requirements. Current technology used for solar energy conversion, however, is not cost effective. In addition, solar thermal power systems are also generally less efficient as compared to fossil fuel based thermal power plants. There is a large variety of systems for solar thermal power generation, each with certain advantages and disadvantages. A distinct advantage of solar thermal power generation systems is that they can be easily integrated with a storage system and/or with an auxiliary heating system (as in hybrid power systems) to provide stable and reliable power. Also, as the power block of a solar thermal plant resembles that of a conventional thermal power plant, most of the equipment and technology used is already well defined, and hence does not require major break through research for effective utilisation. Manufacturing of components, too, can be easily indigenized. A solar collector field is generally used for solar thermal energy conversion. The field converts high grade radiation energy to low grade heat energy, which will inevitably involve energy losses as per the laws of thermodynamics. The 2nd law of thermodynamics requires that a certain amount of heat energy cannot be utilised and has to be rejected as waste heat. This limits the efficiency of solar thermal energy technology. However, in many situations, the waste heat can be effectively utilized to perform refrigeration and desalination using absorption or solid sorption systems, with technologies popularly known as “polygeneration”. There is extensive research done in the area of solar collectors, including but not limiting to thermal analysis, testing of solar collectors, and economic analysis of solar collectors. Exergy and optimization analyses have also been done for certain solar collector configurations. Research on solar thermal power plants includes energy analysis at system level with certain configurations. Research containing analysis with insolation varying throughout the day is limited. Hence, there is scope for analysis incorporating diurnal variation of insolation for a solar thermal power system. This thesis centres on the thermodynamic analysis at system level of a solar thermal power system using a concentrating solar collector field and a simple Rankine cycle power generation (with steam as the working fluid) for Indian conditions. The aim is to develop a tool for thermodynamic analysis of solar thermal power systems, with a generalised approach that can also be used with different solar collector types, different heat transfer fluids in the primary loop, and also different working fluids in the secondary loop. This analysis emphasises the solar collector field and a basic sensible heat storage system, and investigates the various energy and exergy losses present. Comparisons have been made with and without a storage unit and resulting performance issues of solar thermal power plants have been studied. Differences between the system under consideration and commercially used thermal power plants have also been discussed, which brought out certain limitations of the technology currently in use. A solution from an optimization analysis has been utilized and modified for maximization of exergy generated at collector field. The analysis has been done with models incorporating equations using the laws of thermodynamics. MATLAB has been used to program and simulate the models. Solar radiation data used is from NREL’s Indian Solar Resource Data, which is obtained using their SUNY model by interpreting satellite imagery. The performance of the system has been analysed for Bangalore for four different days with different daylight durations, each day having certain differences in the incident solar radiation or insolation received. A particular solution of an optimization analysis has been modified using the simulation model developed and analysed with the objective of maximization of exergy generated at collector field. It has been found that the performance of the solar thermal power system was largely dependent on the variation of incident solar radiation. The storage system provided a stableperformance for short duration interruptions of solar radiation occurred on Autumn Equinox (23-09-2002).The duration of the interruption was within the limits of storage unit capacity. The major disruption in insolation transpired on Summer Solstice (21-06-2002) caused a significantly large drop in the solar thermal system performance; practically the system ceased to function due to lack of energy resource. Hence, the use of an auxiliary heating system hasbeen considered desirable. The absence of a storage unit has been shown to cause a significant loss in gross performance of the power system. The Rankine cycle turbine had many issues coping with a highly fluctuating energy input, and thus caused efficiency losses and even ceased power generation. A storage unit has been found to be ideal for steady power generation purposes. Some commercial configurations may lack a storage system, but they have been compensated by the auxiliary heating system to ensure stable power generation. The optimization of the solar collector determines that optimal collector temperatures vary in accordance to the incident solar radiation. Hence, the collector fluid outlet temperature must not be fixed so as to handle varying insolation for optimal exergy extraction. The optimal temperatures determined for Bangalore are around 576 K which is close to the values obtained by the simulation of the solar thermal power system. The tools for analysis and simulation of solar thermal power plants developed in this thesis is fairly generalised, as it can be adapted for various types of solar collectors and for different working fluids (other than steam), such as for Organic Rankine Cycle (ORC). The model can also be easily extended to other types of power cycles such as Brayton and Stirling cycles.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-05-01T13:36:45Z No. of bitstreams: 1 DALTON CÉZANE GOMES VALADARES - DISSERTAÇÃO PPGCC 2015..pdf: 6500440 bytes, checksum: f8b244a64bf81646d322b68023c204d9 (MD5) / Made available in DSpace on 2018-05-01T13:36:45Z (GMT). No. of bitstreams: 1 DALTON CÉZANE GOMES VALADARES - DISSERTAÇÃO PPGCC 2015..pdf: 6500440 bytes, checksum: f8b244a64bf81646d322b68023c204d9 (MD5) Previous issue date: 2015-07 / No âmbito industrial, é sabido que as redes sem fio são as mais indicadas, já que possuem baixo custo de implantação, maior flexibilidade e são menos invasivas ao ambiente. Na literatura, dentre as tecnologias de rede sem fio aplicadas em ambientes industriais, pouco destaque é dado às tradicionais 802.11a/b/g, conhecidas pelo uso doméstico e chamadas WiFi (acrônimo de Wireless Fidelity). A pesquisa, ora descrita, tem como objetivo avaliar o desempenho de uma rede 802.11g em um ambiente industrial de uma usina termoelétrica (UTE). O cenário de análise foi constituído de 4 enlaces de comunicação, com o principal deles possuindo uma distância de, aproximadamente, 150 metros. Para a avaliação do desempenho da rede, foram consideradas três métricas: taxa de perda de pacotes, Taxa de Transferência e tempo de resposta. Os testes foram realizados por meio do estabelecimento de comunicação entre pontos dentro da sala de motores (primeiro enlace) e o servidor localizado na sala de administração (último enlace). Os resultados obtidos para potência do sinal foram comparados aos valores estimados por meio do modelo Log Distance Path Loss. Observou-se que o desempenho da comunicação realizada pela rede não sofreu degradação significativa, mesmo em um ambiente sujeito à interferência eletromagnética e demais características intrínsecas a uma UTE. Após a análise concluída, verificou-se a viabilidade do uso da tecnologia 802.11g para comunicação de dados em ambientes com características similares às de uma usina termoelétrica. / In industry, it is known that wireless networks are the most suitable, since they have low implementation cost, greater flexibility and are less invasive to the environment. In the literature, among the wireless network technologies applied in industrial environments, little attention is given to traditional 802.11a/b/g, known by the domestic use and by the acronym WiFi (Wireless Fidelity). This work aims to evaluate the performance of an 802.11g network in an industrial environment of a thermal power plant. The scenario consists of four communication links, with the main one having a distance of approximately 150m. For the evaluation of network performance, we considered three metrics: packet loss rate, bandwidth and response time. Tests were carried out through the establishment of communication between points within the engine square (first link) and the server located in the boardroom (last link). The obtained results for the signal strength at each point were compared with the estimated values by the Log Distance Path Loss Model. It was verified that the performance of the communication performed by the network did not suffer significant degradation, even being in an environment subject to considerable electromagnetic interference. After the concluded analysis, it was found feasibility of using 802.11g technology for data communication in environments with characteristics similar to those of a thermal power plant.

Economic dispatch is an important optimization challenge in power systems. It helps to find the optimal output power of a number of generating units that satisfy the system load demand at the cheapest cost, considering equality and inequality constraints. Many nature inspired algorithms have been broadly applied to tackle it such as particle swarm optimization. In this dissertation, two improved particle swarm optimization techniques are proposed to solve economic dispatch problems. The first is a hybrid technique with Bat algorithm. Particle swarm optimization as the main optimizer integrates bat algorithm in order to boost its velocity and to adjust the improved solution. The second proposed approach is based on Cuckoo operations. Cuckoo search algorithm is a robust and powerful technique to solve optimization problems. The study investigates the effect of levy flight and random search operation in Cuckoo search in order to ameliorate the performance of the particle swarm optimization algorithm. The two improved particle swarm algorithms are firstly tested on a range of 10 standard benchmark functions and then applied to five different cases of economic dispatch problems comprising 6, 13, 15, 40 and 140 generating units. / Electrical and Mining Engineering / M. Tech. (Electrical Engineering)

Actuellement, la production d’énergie est de plus en plus associée à une hausse simultanée d’émissions de Gaz à Effet de Serre (GES). Malgré les inquiétudes concernant les GES dans l’atmosphère, les énergies fossiles resteront probablement longtemps la principale source d’énergie primaire à l’échelle mondiale. Le procédé de captage de CO2, principal gaz à effet de serre, généralement préconisé est un procédé d’absorption chimique avec de la monoéthanolamine (MEA). Ce procédé pose de nombreux problèmes comme le coût de la régénération de l’amine. Cette étude s’intéresse à une alternative consistant à absorber chimiquement le dioxyde de carbone dans une solution aqueuse d’ammoniac. Par ailleurs, dans le but d’améliorer les procédés de captage et d’intensifier le transfert gaz-liquide, des techniques de captage à base de membranes (contacteurs membranaires) ont été développées et couplées à l’absorption chimique. Dans un premier temps des mesures d’absorption du CO2 à partir d’une solution aqueuse d’ammoniac ont été réalisées. Ces mesures ont été effectuées entre 278 et 303 K dans un réacteur fermé de type cellule de Lewis. Le taux de charge maximum, la pression partielle du CO2 à l’équilibre ont été déterminés. Les performances ont été comparées à celles de solvants conventionnels tels que la MEA et la N-méthyldiéthanolamine (MDEA). Dans un second temps, des mesures d’absorption à travers un contacteur membranaire ont été réalisées. L’efficacité de captage est étudiée en fonction de la nature des matériaux constituants la membrane et des paramètres opératoires. Les résultats obtenus montrent qu’il est possible de capter le CO2 par l’ammoniaque à travers une membrane avec une efficacité de captage supérieure à 90 %. La membrane limite les pertes d’ammoniaque mais ne les élimine pas. La simulation du fonctionnement de la centrale thermique alimentée au charbon pulvérisé (CP) intégrant le captage de CO2 a été réalisée à l’aide du logiciel Aspen Plus. Les fumées issues de la post-combustion sont captées par différents solvants. Une étude paramétrique a été conduite afin de préciser les conditions optimales pour capter le CO2 par l’ammoniaque. Des comparaisons de dépense énergétique dans le cas de la régénération pour les solvants NH3, MEA et MDEA ont été réalisées. L’étude comparative suggère que l’absorption chimique utilisant l’ammoniaque comme solvant est un des procédés les plus intéressants pour la centrale CP. / Nowadays rising energy production is associated with increasingly greenhouse gases (GHG) emissions. Despite of concerns about GHG emissions in atmosphere, fossil fuels will probably remain the main source of primary energy for a long time. The process of CO2 (the main greenhouse gas) capture, generally recommended is the chemical absorption with monoethanolamine (MEA). This process has many problems such as the regeneration cost of amine. This study examines an alternative which consists in absorbing carbon dioxide by ammonia aqueous solution. Moreover, membranes have been developed and coupled to chemical absorption to improve the capture processes and to intensify the gas-liquid transfer. Firstly measurements of CO2 absorption from an aqueous ammonia solution have been conducted. These measurements have been made between 278 and 303 K in a closed reactor type Lewis cell. Maximum CO2 loading, CO2 partial pressure at equilibrium have been determined. The solvents performances have been compared with respect to conventional solvents such as MEA and N-methyldiethanolamine (MDEA). Secondly absorption measurements through a membrane contactor have been made. The influence of the material nature constituting the membrane and operating parameters on the capture efficiency has been studied. The results have shown that it is possible to capture CO2 from ammonia through a membrane with a capture efficiency greater than 90 %. The membrane limits ammonia losses but does not eliminate it. Operation simulation of the thermal power plant fed with pulverized coal (CP) including CO2 capture has been performed using the software Aspen Plus. The flue gases containing CO2 from post-combustion have been captured by different solvents. A parametric study has been conducted to clarify the optimal conditions to capture CO2 by ammonia. Comparisons of energy consumption in the case of solvent regeneration for NH3,MEA andMDEA have been performed. The comparative study suggests that the use of ammonia as a solvent in chemical absorption is the most interesting process for the central CP.

Diploma thesis gives an overview of artificial lightweight aggregates based on fly ash. Fly ash such as the residues of coal burning is currently one of the most used secondary raw materials for new building materials for research papers. The results shows that the secondary energy products are not just fully substitute the primary component, but in many cases improves the final properties of building products. Wide complex of fly ashes not only from domestic sources was tested and it`s main properties important for it`s further application was determined. Laboratory production of artificial aggregates based on fly ash made by sintering and also by cold bonding and following manufacture of artificial fly ash aggregates in technological conditions are also solved. The thesis is simultaneously concentrate on review of the suitability of fly ash aggregates in lightweight concrete.It was found that the highest quality fly ash for the production of sintered fly ash aggregate is fly ash and FBC ash is the best for the production of cold bonded aggregates. It was also verified that both types of aggregates are applicable to lightweight concrete class LC 20/22. The vast majority of manufactured aggregates is suitable for the production of lightweight concrete class LC 30/33. It was demonstrated that the sintered fly ash aggregates can be also used for high strength lightweight concrete class LC 50/55. Tests have also verified that all tested fly ashes and products produced from them meet the requirements of legislation on environment.