Possibilities of Use of Wood Wastes in the Power Industry of Russia

2019 ◽  
Vol 23 (6) ◽  
pp. 17-21 ◽  
Author(s):  
O.V. Marchenko ◽  
S.V. Solomin ◽  
A.N. Kozlov
Keyword(s):  
Power Plants ◽  
Electric Energy ◽  
Woody Biomass ◽  
Process Efficiency ◽  
Thermochemical Conversion ◽  
Wood Pellets ◽  
Fuel Gas ◽  
Multi Stage ◽  
Effective Use ◽  
Generator Gas

This paper is devoted to the selection and justification the development directions of technology for the effective use of wood waste by their thermochemical conversion as part of gas-generating power plants with improved environmental characteristics. A comparison was made of the electric energy cost obtained by the use of various types of fuel (gas, diesel fuel, coal, wood chips and wood pellets). An economic comparison of single- and multi-stage gasification of woody biomass has been performed. It is shown that a more promising technology for processing biomass is three-stage gasification due to higher process efficiency. The features of the experimental gas-generating unit under development with three-stage gasification of woody biomass, which allows producing a generator gas with a minimum amount of tar, are considered.

scholarly journals Fundamental Characteristics and Kinetic Analysis of Lignocellulosic Woody and Herbaceous Biomass Fuels

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1008 ◽  
Author(s):  
Gyeong-Min Kim ◽  
Dae-Gyun Lee ◽  
Chung-Hwan Jeon
Keyword(s):  
Kinetic Data ◽  
Co2 Emission ◽  
Energy Production ◽  
Power Plants ◽  
Woody Biomass ◽  
Biomass Fuels ◽  
Wood Pellets ◽  
Distributed Activation Energy Model ◽  
Herbaceous Biomass ◽  
Char Oxidation

Biomass fuels are increasingly being viewed as viable alternatives for energy production in biomass-fired power plants and coal-fired power plants, which aim to employ co-firing technologies to achieve CO2 emission reductions. In this study, wood pellets (woody biomass) and kenaf (herbaceous biomass) were fully characterized in terms of their elemental compositions, pyrolysis, and char oxidation kinetics. Kinetic parameters were obtained through the application of the multi-Gaussian distributed activation energy model (DAEM) and Kissinger equation. Analyses of the ash indicated that, unlike coal, the biomass fuel is mostly composed of metal oxide ash. The calorific values of wood pellets were slightly higher than those of kenaf. Detailed kinetic analyses are presented so that steps can be taken to combust the biomass fuels in power plants. The kinetic data suggested that the mechanism for the char oxidation of wood pellets may be more complex than that for kenaf. In summary, these torrefied and pyrolyzed materials were found to represent potentially useful biomass fuels.

Thermal/electric energy generation and CO2 production for greenhouse facilities

2019 ◽  
Vol 2 (3) ◽  
pp. 141-151
Author(s):  
O. E. Gnezdova ◽  
E. S. Chugunkova
Keyword(s):  
Carbon Dioxide ◽  
Power Distribution ◽  
Power Plants ◽  
Electric Energy ◽  
Electricity Consumption ◽  
Vegetable Crops ◽  
Carbon Dioxide Injection ◽  
Electricity Rates ◽  
Traditional Patterns ◽  
Generation Power

Introduction: greenhouses need microclimate control systems to grow agricultural crops. The method of carbon dioxide injection, which is currently used by agricultural companies, causes particular problems. Co-generation power plants may boost the greenhouse efficiency, as they are capable of producing electric energy, heat and cold, as well as carbon dioxide designated for greenhouse plants.Methods: the co-authors provide their estimates of the future gas/electricity rates growth in the short term; they have made a breakdown of the costs of greenhouse products, and they have also compiled the diagrams describing electricity consumption in case of traditional and non-traditional patterns of power supply; they also provide a power distribution pattern typical for greenhouse businesses, as well as the structure and the principle of operation of a co-generation unit used by a greenhouse facility.Results and discussion: the co-authors highlight the strengths of co-generation units used by greenhouse facilities. They have also identified the biological features of carbon dioxide generation and consumption, and they have listed the consequences of using carbon dioxide to enrich vegetable crops.Conclusion: the co-authors have formulated the expediency of using co-generation power plants as part of power generation facilities that serve greenhouses.

Composite Сarbonaceous Сoal-Water Suspensions

2021 ◽  
Vol 1045 ◽  
pp. 212-225
Author(s):  
Olena Svietkina ◽  
Kostiantyn Bas ◽  
Sergiy Boruk ◽  
Roman Klishchenko ◽  
Oleksandr Yehurnov ◽  
...  
Keyword(s):  
Power Plants ◽  
Statistical Data ◽  
Main Type ◽  
Thermal Power ◽  
Electric Energy ◽  
Oil Refining ◽  
Thermal Power Plants ◽  
Water Suspensions ◽  
Ash And Slag Waste ◽  
Slag Waste

In Ukraine, up to 75% of all electricity is supplied by thermal power plants, the main type of fuel for which is coal, which leads to the release of ash and slag waste at power plants in huge quantities. Every 10 years (according to statistical data) the amount of ash and slag produced at thermal power plants doubles. The use and creation of new modified consumers of coal-water fuel (CWF) and coal-water suspensions (CWS) occurs periodically. The ease of handling suspensions is captivating: in the energy sector, they can serve as the basis for the effective disposal of numerous accumulated wastes from coal preparation and oil refining, a significant reduction in the consumption of minerals for generating heat and electric energy, and minimizing the effect of heat power engineering on public health and the state of nature.

scholarly journals O PROCESSO DE ESTUDO E IMPLANTAÇÃO DE PCHS E A IMPORTÂNCIA DO LICENCIAMENTO AMBIENTAL PARA A COMUNICAÇÃO ENTRE EMPREENDEDORES E COMUNIDADE LOCAL

2019 ◽  
Vol 34 (01) ◽  
pp. 94-104
Author(s):  
Mariana Wagner de Toledo Piza ◽  
Osmar De Carvalho Bueno ◽  
Francisco José Blasi de Toledo Piza
Keyword(s):  
Environmental Impact ◽  
Power Plants ◽  
Local Community ◽  
Electric Energy ◽  
Implementation Process ◽  
Sao Paulo ◽  
São Paulo ◽  
Hydroelectric Power ◽  
Hydropower Potential ◽  
Environmental Licensing

O PROCESSO DE ESTUDO E IMPLANTAÇÃO DE PCHS E A IMPORTÂNCIA DO LICENCIAMENTO AMBIENTAL PARA A COMUNICAÇÃO ENTRE EMPREENDEDORES E COMUNIDADE LOCAL   MARIANA WAGNER DE TOLEDO PIZA1; OSMAR DE CARVALHO BUENO2; FRANCISCO JOSÉ BLASI DE TOLEDO PIZA3   1Economia, Sociologia e Tecnologia, Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agronômicas, Botucatu, R. José Barbosa de Barros, 1780, JardimParaíso, CEP: 18610-034, Botucatu, São Paulo, Brasil, [email protected] 2Economia, Sociologia e Tecnologia, Universidade Estadual Paulista, Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agronômicas, Botucatu, R. José Barbosa de Barros, 1780, JardimParaíso, CEP: 18610-034, Botucatu, São Paulo, Brasil, [email protected] 3Engenharia de Produção, Faculdade Iteana de Botucatu, Av. Alcides Cagliari, 2601, Jardim Aeroporto, CEP: 18606-855, Botucatu, São Paulo, Brasil, [email protected]   RESUMO: O trabalho objetivou apresentar o processo de estudo para implantação de Pequenas Centrais Hidrelétricas (PCHs), o momento em que a comunidade local participa deste processo e a importância de sua efetiva participação. Utilizou-se a realidade brasileira no que tange o estudo para implantação de PCHs, a legislação nacional e órgãos envolvidos no processo como: Agência Nacional de Energia Elétrica (ANEEL), Agência Nacional de Águas (ANA), Departamento de Água e Energia Elétrica (DAEE) e Companhia Ambiental do Estado de São Paulo (CETESB). O processo de estudo de um potencial hidráulico conta com cinco fases: Estimativa do Potencial Hidrelétrico; Inventário Hidrelétrico; Estudo de Viabilidade; Projeto Básico e Projeto Executivo. Em consonância a este processo é necessário realizar o Estudo de Impacto Ambiental (EIA) e o respectivo Relatório de Impacto Ambiental (Rima). Como ambiente de diálogo entre todos os atores envolvidos, o processo de licenciamento ambiental conta com as audiências públicas, nessas devem ocorrer trocas de informações e conhecimento das demandas dos diversos envolvidos, inclusive da comunidade local, sua efetiva participação é fundamental para a otimização o projeto nos âmbito socioambiental.   Palavras-chaves: PCHs, licenciamento ambiental, comunicação.   THE SHPs STUDY AND IMPLEMENTATION PROCESS AND IMPORTANCE OF ENVIRONMENTAL LICENSING FOR COMMUNICATION BETWEEN ENTREPRENEURS AND LOCAL COMMUNITY   ABSTRACT: The aim of this paper was to present the process of study and implementation of Small Hydroelectric Power Plants (SHPs), local community participation and the importance of their effective participation. The Brazilian reality was used in the study for the implementation of SHPs, as well as, national legislation and public agencies involved in the process, such as: National Electricity Agency (ANEEL), National Water Agency (ANA), Department of Water and Electric Energy (DAEE) and Environmental Company of the State of São Paulo (CETESB). The process of hydraulic potential study has five stages: hydropower potential estimation; hydraulic inventory; viability study; basic project and executive project.  It is also necessary to carry out the Environmental Impact Study (EIA) and Environmental Impact Report (RIMA). According to all the actors involved, the environmental licensing process relies on public hearings, where must occur change of information and knowledge stakeholders demands, including the local community, which effective participation is fundamental for the optimization of the project socio-environmental scope. Keywords: SHPs, environmental licensing, communication.

scholarly journals Stochastic Optimization for Long Term Capital Structures, Systems, and Components Refurbishment and Replacement

2020 ◽  
Author(s):  
Congjian Wang ◽  
Diego Mandelli ◽  
Shawn St Germain ◽  
Curtis Smith ◽  
David Morton ◽  
...  
Keyword(s):  
Stochastic Optimization ◽  
Nuclear Power ◽  
Power Plants ◽  
Capital Investments ◽  
Priority List ◽  
Multi Stage ◽  
Plant Operations ◽  
Economic Constraints ◽  
Returns On Investment

Abstract As commercial nuclear power plants (NPPs) pursue extended plant operations in the form of Second License Renewals (SLRs), opportunities exist for these plants to provide capital investments to ensure long-term, safe, and economic performance. Several utilities have already announced their intention to pursue extended operations for one or more of their NPPs via SLR2. The goal of this research is to develop a risk-informed approach to evaluate and prioritize plant capital investments made in preparation for, and during the period of, extended plant operations to support decisions in NPP operations. In order to prioritize project selection via a risk-informed approach we developed a single decision-making tool that integrates safety/reliability, cost, and stochastic optimization models to provide users with data analysis capabilities to more cost effectively manage plant assets. Both stochastic analysis methods — such as Monte Carlo-based sampling strategies — and multi-stage stochastic optimization strategies are employed to provide priority lists to decision-makers in support of risk-informed decisions. We applied the proposed method to a trial application of projected replacement/refurbishment expenditures for plant capital assets (i.e., structures, systems, and components [SSCs]). The objective is to optimize the SSC replacement/refurbishment schedule in terms of economic constraints, data uncertainties, and SSC reliability data, as well to generate a priority list for maximizing returns on investment.

Woody Biomass Co-Firing in Pulverized Coal Fired Boilers

2011 ◽  
Author(s):  
Luther M. Raatikka
Keyword(s):  
Heat Input ◽  
Heat Rate ◽  
Woody Biomass ◽  
Electrical Energy ◽  
Pulverized Coal ◽  
Wood Pellets ◽  
Capital Costs ◽  
Auxiliary Power ◽  
Boiler Efficiency ◽  
Fuel Costs

With legislation requiring utilities to produce a significant fraction of their electrical energy with renewable fuel supplies, it is anticipated that cofiring biomass in large utility boilers will become increasingly popular. Boilers that are designed to burn pulverized coal (PC) can typically burn woody biomass at up to 5% of the rated heat input. An 800 MW PC-fired unit could, therefore, produce up to 40 MW of renewable energy with biomass co-firing. The generating plant may experience a net capacity de-rating whenever biomass is co-fired. This potential reduction in net plant output may be attributed to reduced boiler efficiency and additional auxiliary power requirements. Biomass fuel handling related auxiliary power requirements are dependent upon the form in which biomass is delivered to the plant. Preparation of woody biomass for co-firing in large PC-fired boilers is typically performed onsite with hammer mills or by off-site processing. For an 800 MW unit, onsite fuel size reduction will usually result in an incremental increase in auxiliary power of 3–4 MW, whereas the use of pre-processed biomass such as wood pellets will require a minimal increase in parasitic load. However, delivered fuel costs for raw wood requiring onsite processing are at least 60% lower than that of densified biomass on a heat input basis. This paper includes an economic comparison of co-firing woody biomass that is processed onsite by direct injection vs. co-firing densified woody biomass by co-milling in a large PC-fired boiler. This comparison will consider delivered fuel costs, capital costs, CO2 emissions and impacts upon boiler efficiency and net heat rate.

Gas Turbine Efficiency (GTE) Benefits of GTE Water Wash Systems

2008 ◽  
Author(s):  
Thomas Wagner ◽  
Robert J. Burke
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Process Efficiency ◽  
Compression Process ◽  
Lower Efficiency ◽  
Fuel Gas ◽  
Air Filter ◽  
Turbine Efficiency ◽  
Industrial Gas Turbine

The desire to maintain power plant profitability, combined with current market fuel gas pricing is forcing power generation companies to constantly look for ways to keep their industrial gas turbine units operating at the highest possible efficiency. Gas Turbines Operation requires the compression of very large quantities of air that is mixed with fuel, ignited and directed into a turbine to produce torque for purposes ranging from power generation to mechanical drive of pumping systems to thrust for air craft propulsion. The compression of the air for this process typically uses 60% of the required base energy. Therefore management of the compression process efficiency is very important to maintain overall cycle efficiency. Since fouling of turbine compressors is almost unavoidable, even with modern air filter treatment, and over time results in lower efficiency and output, compressor cleaning is required to maintain gas turbine efficiency.

RESTORABLE ENERGY SOURCES AS A FACTOR OF THE COMPETITIVE IMPROVEMENT ABILITY OF A TOURIST DESTINATION

2007 ◽  
Vol 14 (2) ◽  
pp. 263-270
Author(s):  
Daniela Gračan ◽  
Romina Alkier Radnić ◽  
Siniša Bogdan
Keyword(s):  
Power Plants ◽  
Market Price ◽  
Electric Energy ◽  
Energy Sources ◽  
Energy Costs ◽  
Tourist Destination ◽  
Wind Power Plants ◽  
The Right ◽  
Tourist Economy ◽  
The Town

Energy supply represents not only the energetic and ecological undertaking factor of tourist economy bearers, but the factor of profitability and competitiveness within the foreign tourist market as well. Lower energy costs form the prerequisites for higher profit accomplishments, as well as better market price competitiveness. Instead of exploiting natural resources, tourism should make the most of them, which brings into relief the directing of tourist economy subjects towards the use of restorable energy sources, particularly solar and wind energy. In spite of favourable climate features of Croatia, expressed in terms of insulation and windstrength, the restorable energy sources are still used rather insignificantly. Some positive moves in such a trend are noticeable on the island of Pag and in the town of Sibenik, where the electric energy is obtained in wind power-plants. In accordance with the concept of sustainable development of tourism, both solar energy and wind-mill energy should represent the skeleton for the energetic supply of the Croatian tourist coastline in the future. And only then, with the right amount of energy and without dependence on the world energetic markets, Croatia can develop its own healthy economic and tourist future.

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