Academic literature on the topic 'Environmental aspects of Electric power-plants'
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Journal articles on the topic "Environmental aspects of Electric power-plants"
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Mroziński, Adam, and Izabela Piasecka. "Selected Aspects Of Building, Operation And Environmental Impact Of Offshore Wind Power Electric Plants." Polish Maritime Research 22, no. 2 (April 1, 2015): 86–92. http://dx.doi.org/10.1515/pomr-2015-0021.
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Abstract This paper describes essence of work of offshore wind power electric plants and crucial aspects of their building and operating. Prospects for development of global, European and domestic markets of offshore wind power industry have been delineated. A comparative analysis of environmental impact of an offshore and land-based 2MW wind power electric plant has been performed by using LCA method and Ecoindex – 99 (Ekowskaźnik 99) modelling.
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Sarkisov, Ashot A., Sergey V. Antipov, Dmitry O. Smolentsev, Vyacheslav P. Bilashenko, Mikhail N. Kobrinsky, Vladimir A. Sotnikov, and Pavel A. Shvedov. "Low-power nuclear power plants in the context of electric power systems transformation." Nuclear Energy and Technology 7, no. 1 (March 30, 2021): 55–59. http://dx.doi.org/10.3897/nucet.7.65315.
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Increasing economic importance of the Arctic, further intensification of northern sea routes, and exceptional sensitivity of the arctic natural environment to anthropogenic impacts are fundamental factors for a comprehensive study of environmental aspects in the application of innovative technologies for the development of infrastructure in the Arctic. Despite the growing interest in low-power nuclear power plants as a distributed generation facility, their possible application in technologically isolated power systems does not lose relevance. The development of both the Arctic and Far Eastern regions of the Russian Federation presents great opportunities and demand for the use of nuclear power sources. Also, development programs for the Russian arctic zone imply a significant increase in the role and number of nuclear power facilities, in other words of potential radiation-hazardous facilities. Large-scale use of nuclear-powered installations in the Arctic necessitates advanced development of a scientifically grounded and modern forecasting system as well as assessments of threats and risks in case of possible radiation emergencies at nuclear- and radiation-hazardous facilities. Also, the development of proposals for necessary measures to minimize negative consequences of such emergencies is required. This is especially true for the case of compact placement of industrial, infrastructure and residential facilities in the Arctic in the immediate vicinity of nuclear facilities. The paper demonstrates that the demand for low-power nuclear power plants and their competitiveness will grow steadily in the conditions of electric-power industry decentralization, further spread of distributed generation and the development of technologically isolated power systems. Approaches to the generation of a low nuclear-power system based on the philosophy of industrialization of production and centralized management are presented. Special features of the environmental impact assessment of low-power nuclear power plants for the development of a methodology to study the radio-ecological hazard related problems are provided.
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Widiyanto, Anugerah, Seizo Kato, and Naoki Maruyama. "Optimizing Selection of Appropriate Power Generation Systems in Indonesia By Using Distance Based Approach Method." Journal of Energy Resources Technology 126, no. 1 (March 1, 2004): 63–71. http://dx.doi.org/10.1115/1.1649740.
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A deterministic quantitative model has been developed to compare the technical, economical and environmental feature of various electric power generating plants. The model, which is based on matrix operations, is used in evaluating the various aspects of energy sources available for electricity generation systems in a developing country. Several energy sources which could be considered for production of electricity to meet current and future electricity demands have been chosen. These will include fossil fuel fired, nuclear, and natural-renewable energy power plants. And, a set of criteria for optimized selection includes five area of concerns: energy economy, energy security, environmental protection, socio-economic development and technological aspects for the electric power generations. The model developed in this study is applied to the Indonesian’s electric power sector development. Most of the data required are obtained from various sources related to power industry in Indonesia, such as the electricity generating authority of Indonesia (Perusahaan Listrik Negara, PLN), Government of Indonesia, World Bank, Asian Development Bank, United Nations, and other sources, both in published and public domains. The result of this study will be a ranking of energy sources for Indonesia power generation systems based on the Euclidean composite distance of each alternative to the designated optimal source of energy.
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Gajdzik, Bożena, Andrzej Wyciślik, and Krystian Janiszewski. "Classification and Assessment of Environmental Aspects of Converter and Electric Steel Plants." Solid State Phenomena 212 (December 2013): 175–78. http://dx.doi.org/10.4028/www.scientific.net/ssp.212.175.
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The topic of this publication is classification and assessment of environmental aspects in metallurgical enterprise on an example of steel plant. The analysis included aspects which have negative influence on the environment. Taking into account the structure of the proceedings of the process of melting steel in converter and electric furnaces there were key aspects established which are treated as priority in investment programs and current activities within environmental protection process in order to limit their negative influence on the environment. The publication proposes a method of acting in the assessment of environmental aspects for each type of steel plant. The publication can be useful for the engineers and technologies from staff and to services taking care of environmental protection in metallurgical enterprises.
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Chudy, Aleksander, and Henryka Danuta Stryczewska. "Electric vehicle charging – aspects of power quality and electromagnetic compatibility." Journal of Automation, Electronics and Electrical Engineering 1, no. 1 (December 31, 2019): 17–22. http://dx.doi.org/10.24136/jaeee.2019.002.
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Electromobility is becoming an increasingly popular topic mostly thanks to its positive environmental impact. Replacing combustion engine cars with electric vehicles seems to be a matter of time. Electric cars have many advantages, but their impact on a power quality must be taken into consideration. The article describes current status of electromobility and problems related to the influence of charging stations on a power system. The issue of standardisation of electromagnetic compatibility requirements for charging stations is also discussed.
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Crawford, Mark. "Waves, Currents and Electric Potential." Mechanical Engineering 135, no. 02 (February 1, 2013): 30–35. http://dx.doi.org/10.1115/1.2013-feb-2.
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This article discusses various aspects and uses of hydrokinetics in the turbine industry. Hydrokinetics is a rapidly developing field, where both big companies and start-ups can compete equally in engineering and design. Designs for hydrokinetic devices continue to evolve. The most popular hydrokinetic device is the turbine. As these turbines are installed underwater, which is much denser than air, hydrokinetic turbines provide much more power than wind turbines at relatively low water current speeds. Considerable research and development are being conducted on three aspects of hydrokinetics technology: optimization of the devices to maximize their capture of wave energy; overall electromechanical system design; and development of control approaches to maximize power output under a variety of sea states. In addition to the efforts to optimize hydrokinetics, important research is also dealing with critical aspects of site evaluation, seabed mechanics and engineering, environmental impacts, and regulatory compliance. Research shows that interdisciplinary engineering and environmental analysis is at the forefront of identifying potential environmental impacts of hydrokinetics and mitigating them through engineering design.
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Chiesa, Paolo, and Ennio Macchi. "A Thermodynamic Analysis of Different Options to Break 60% Electric Efficiency in Combined Cycle Power Plants." Journal of Engineering for Gas Turbines and Power 126, no. 4 (October 1, 2004): 770–85. http://dx.doi.org/10.1115/1.1771684.
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All major manufacturers of large size gas turbines are developing new techniques aimed at achieving net electric efficiency higher than 60% in combined cycle applications. An essential factor for this goal is the effective cooling of the hottest rows of the gas turbine. The present work investigates three different approaches to this problem: (i) the most conventional open-loop air cooling; (ii) the closed-loop steam cooling for vanes and rotor blades; (iii) the use of two independent closed-loop circuits: steam for stator vanes and air for rotor blades. Reference is made uniquely to large size, single shaft units and performance is estimated through an updated release of the thermodynamic code GS, developed at the Energy Department of Politecnico di Milano. A detailed presentation of the calculation method is given in the paper. Although many aspects (such as reliability, capital cost, environmental issues) which can affect gas turbine design were neglected, thermodynamic analysis showed that efficiency higher than 61% can be achieved in the frame of current, available technology.
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Beloborodov, Sergey S., and Aleksey A. Dudolin. "Prospects for Combined Generation of Heat and Electricity at a Combined Heat and Power Plant in a Modern Power System." Vestnik MEI 5, no. 5 (2020): 54–66. http://dx.doi.org/10.24160/1993-6982-2020-5-54-66.
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Given the climatic and geographical conditions of the Russian Federation, the development of cogeneration should become the main line of measures aimed at increasing the energy efficiency and reducing greenhouse gas emissions in the country. However, the implementation of programs for development of renewable energy sources (RES) and nuclear power plants (NPP) entails risks of decreasing the amount of combined generation of electricity and heat by combined heat and power plants (CHPP) in the daily load curve base part. The current state of the wholesale market of electric power is characterized by critical conditions for the existing CHPPs in the first price zone of the wholesale market. The electric power cost formed from competitive power bid (CPB) results is such that the incomes earned by heat generating facilities are insufficient for fully covering the costs of their overhauls and modernization of their equipment. The “old” heat generation facilities, including CHPPs, subsidize the development of combined cycle power plants (CCPPs), RES, hydroelectric power plants (HPPs), and NPPs. The Russian Federation energy system development projects must be elaborated taking into account the results from a multivariate analysis of operational, technical, technological, economic, environmental, and social aspects. The heat supply schemes for cities and municipalities are developed subject to ensuring the preset level of reliability with minimizing its cost for the end customer. The minimum cost of heat supply can only be achieved for the optimal structure of heat and electricity generation capacities. This structure must incorporate equipment able to operate in the base, semi-peak, and peak parts of the daily electric load curve, and provide a power margin for passing seasonal maximums in the consumption of electricity and heat. The main milestones of the establishment and evolution of the energy system of Russia are considered. The main trends are shown along with the problems that have arisen in the operation of cogeneration power facilities in connection with the influence of new energy sources. The experience gained in leading foreign countries that have introduced RES is analyzed, and the influence of these sources on the power system balance is studied. The prospects of using combined electricity and heat generating facilities represented by highly maneuverable small- and medium-capacity gas turbine-based CHPPs in the semi-peak and peak parts of the daily electric load curve are analyzed.
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Jevtic, Milenko, Ljiljana Radovanovic, and Zivoslav Adamovic. "Numerical and experimental aspects of thermally induced vibration in real rotors." Thermal Science 15, no. 2 (2011): 545–58. http://dx.doi.org/10.2298/tsci110314039j.
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Temperature fields in electric energy generators may lead to mechanical dissbalance of an already balanced rotor. The author collected information in a number of steam power plants and confirmed the existence of the problem. This paper is presents the specific case of thermal deformation of the rotor, caused by an asymmetrical temperature field in scale of rotor. On the grounds of the relevant physical aspects, we propose a mathematical model identifying fields in a turbo generator rotor and suggest the optimum control by which the unwanted effects are eliminated.
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Williams, M. C., N. T. Holcombe, and M. McMillian. "Environmental Aspects of Coal-Fueled Diesel Engines." Journal of Engineering for Gas Turbines and Power 111, no. 3 (July 1, 1989): 491–97. http://dx.doi.org/10.1115/1.3240280.
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Conventional diesel engines are considered by some to be contributors to environmental problems since they emit NOx, a suspected acid rain precursor. Initial testing has shown that CWS-fueled diesels emit substantially reduced NOx emissions. While emissions of particulates and SOx may be potentially higher with coal fuels, assessment of the control technology indicates excellent potential for meeting existing and future standards for these emissions. As a result of activities managed by the Morgantown Energy Technology Center, the economic and technical feasibility of CWS-fueled diesel engines has been determined. Recently, both General Electric and A. D. Little/Cooper Bessemer were selected for 5-year contracts aimed at developing by 1993 the components and subsystems necessary for subsequent private sector demonstration and commercialization of coal-fueled diesel power systems. The development of these CWS-fueled systems will necessitate the application of hot gas cleanup contaminant control technology to ensure that the systems burn coal in an environmentally sound manner. The objective of this paper is to discuss the environmental concerns, emission goals, and the control methodologies, devices, and strategies that will be used to ensure CWS-fueled diesel engines will meet current and potential environmental standards.
Dissertations / Theses on the topic "Environmental aspects of Electric power-plants"
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Lesley, Michael Patrick. "The fluxes and fates of arsenic, selenium, and antimony from coal fired power plants to rivers." Thesis, Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180307/unrestricted/lesley%5fmichael%5fp%5f200312%5fms.pdf.
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May, John R. (John Robert) 1978. "Sustainability of electricity generation using Australian fossil fuels." Monash University, Dept. of Chemical Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/9537.
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Yeung, Hon-chung, and 楊漢忠. "Clean technology advancement in the power industry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31253908.
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Davidson, Gregg Randall 1963. "The applicability of boron isotopes in determining fate and transport of leachate from electric utility solid waste." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276980.
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The boron isotopic ratios of three contaminated ground water samples and of leachate from four fly ash samples are shown to be significantly different than the isotopic ratio of naturally occurring boron in a selected ground water. Analysis is performed using thermal ionization mass spectrometry with a precision of less than 1 per mil. Inductively coupled plasma mass spectrometry is shown to be ineffective for this application. Boron is isolated from solution and concentrated using Amberlite IRA-743 resin with no isotopic fractionation observed. Boron desorption from fly ash is shown to be rapid. Boron isotopic analysis is shown to be a superior method to boron concentration analysis for identifying leachate in a ground water, (1) at the outer limits of a leachate plume, and, (2) when the difference between the boron concentration of the leachate and background water is small. The degree of contamination can be determined if both end members are known.
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Liu, Xinghua, and 刘兴华. "Power system operation integrating clean energy and environmental considerations." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43085866.
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Greenwood, M. F. D. "The fish populations of the Lower Forth Estuary, including the environmental impact of cooling water extraction." Thesis, University of Stirling, 2001. http://hdl.handle.net/1893/22856.
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The present study investigated the fish populations of the lower Forth Estuary, east Scotland. Cooling water extraction by the 2400 MW Longannet Power Station (LPS) inevitably removes a certain quantity of fish from the estuary, all of which experience mortality. The present study employed a sampling regime of greater intensity than previous studies to investigate the extent of mortalities from January 1999 - December 2000. Collections of fish impinged on intake screens were made eight times monthly, at LW or HW of spring or neap tides during the day or by night. Marine species dominated the assemblage of fish collected, with sprat, herring, and whiting contributing > 80% of total abundance. Sprat was twice as abundant as herring in 1999, while the proportions were very similar in 2000. Total abundance of all species collected in 1999 was estimated at 1. 09 x 107, while the value of 3.29 x 107 in 2000 was three times larger. These figures were the largest recorded among British estuarine and marine power stations, but were precisely the correct order based on an exponential relationship between total impingement and water abstraction rate established from data from other locations. Validation of the estimated total biomass of fish removed was given by comparison with the known total mass of all materials disposed to landfill. Statistical analysis of impingement data showed that tidal range and season were the most important environmental variables influencing the rate of removal of fish from the estuary. That light was not significant for most species is attributed to high levels of turbidity and the resulting low visibility by day and night. Demersal and benthic fish abundances collected from 1982 - 2000 in 30 annual trawls at three sites in the mid-lower Forth Estuary were analysed. Species tended to be present in greatest abundance at the most seaward of the sites. Patterns of seasonal abundance reflected those observed in the impingement study at LPS, and catches tended to be greatest at L W. Total species richness showed no significant trend over time, whilst total annual abundance of fish captured in trawls showed a significant negative trend. This was largely due to significant declines in the two most abundant species, namely whiting and eel pout, attributable in the latter case to increasing temperatures. Changes in the ichthyofaunal composition were largely driven by whiting, eel pout, cod and plaice. Eight of ten common species showed no significant trend in abundance over the length of the time series, suggesting them to perhaps be at equilibrium densities. Quantities of commercially fished species above minimum landing size limits that were removed by LPS were very low, and restricted to herring and occasional whiting. The quantity of juveniles that could have recruited into the fished populations was expressed as equivalent adults. The values were larger than any previously reported in the UK, primarily due to the quantities of juvenile fish impinged being greater than at any other British power station, and the importance of the Forth as a nursery area for marine species. It was concluded that LPS is the dominant UK power station in terms of magnitude of impingement losses. It may be prudent to consider a precautionary approach to mitigate losses, and to this end options for reduction of the magnitude of impingement are discussed.
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Jones, Sophia Christina Acle. "Micro-cogeneration optimal design for service hot water thermal loads." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16016.
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Lawson, Allan Brett. "Environmental impact assessment in the routing of high voltage overhead transmission lines : theory and practice in South Africa." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/16103.
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Includes bibliographies.This study resulted from a perception held by the author that more attention is afforded to complying with the procedural elements of Environmental Impact Assessment (EIA) in South Africa, than to ensuring the validity of its technical content. The routing of high voltage overhead transmission lines provides a relevant field of study in which to address this perception. An initial literature review to contextualise the perceived problem showed that the questionable validity of the technical content of EIA was one of six shortcomings identified. To address the problem, an inductive approach was adopted to focus on the interpretation and prediction activities of EIA and two propositions, stated as research questions for discussion, were developed. These referred to the theoretical question of whether methods are specified for high voltage overhead transmission line EIAs, and to the practical question of whether the environmental impacts that are known to result from transmission line projects are effectively addressed in such EIAs in South Africa. Investigating these questions provides insights into whether the technical content of transmission line EIA is sufficiently rigorous in South Africa. The method of study takes the form of a sequentially more focused examination of the literature on EIA, from the strategic level, to the sectoral level and culminating at the project level. EIA methods specified for linear developments were identified at the sectoral level, while at the project level the known environmental impacts that result from high voltage overhead transmission lines were determined. A theoretical background was compiled in this way, which allowed for comparison with the practice as determined from benchmark and case study Environmental Impact Reports (EIRs).
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Vosloo, Wallace L. (Wallace Lockwood). "A comparison of the performance of high-voltage insulator materials in a severely polluted coastal environment." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52625.
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Thesis (PhD)--University of Stellenbosch, 2002.ENGLISH ABSTRACT: The main aim of this research programme was to compare the relative performance of different insulator materials used in South Africa when subjected to a severe marine pollution environment. A test programme and procedure, test facility and instrumentation were established. Some novel instrumentation and monitoring equipment were developed and built specifically for this research programme, supported by data analysing software programs. In order to compare material performance only, all non-material design variables between the test insulators had to be removed (e.g. creepage distance, connecting length, inter-shed spacing, profile, etc.). To achieve this some of the test insulators had to be specially manufactured. Leakage current, electrical discharge activity, climatic and environmental data was collected successfully over a one-year test period, starting with new test insulators. The peak and energy values of the leakage current were identified as the two main parameters needed to describe the leakage current activity on the test insulators. A correlation was found between the climatic and environmental data and the leakage current data, and it was found that the leakage current can be determined successfully from some of the climatic and environmental parameters monitored by using multiple regression techniques. Surface conductivity and energy were found to be the best parameters to show the maximum and continuous interaction of the insulator material surface with the electrolytic pollution layer. A natural ageing and pollution test procedure was developed, which has become a South African standard and is gaining international acceptance. A model and hypothesis are proposed to describe the electrical discharge activity that takes place on the test insulators and explain the difference in leakage current performance of the various materials. Keywords: Insulator, Pollution, High Voltage, Leakage current, Material performance.
AFRIKAANSE OPSOMMING: Die hoofdoel van hierdie navorsingsprogram was om die relatiewe prestasie van verskillende isolatormateriale wat in Suid-Afrika gebruik word te vergelyk in 'n swaar besoedelde marine omgewing. 'n Toetsprogram en prosedure, toets fasiliteit en instrumentasie is gevestig. 'n Paar nuwe instrumente en moniteer toerusting is ontwikkel en gebou spesifiek vir hierdie navorsingsprogram, gesteun deur data analise sagteware programme. Ten einde slegs materiaalprestasie te vergelyk, moes alle nie-materiaal ontwerpsveranderlikes tussen die toetsisolators verwyder word (bv. kruipafstand, konnekteer lengte, tussen-skerm spasiëring, profiel, ens.). Om dit reg te kry moes sommige van die toetsisolators spesiaal vervaardig word. Lekstroom, elektriese ontladingsaktiwiteit, klimaat en omgewingsdata is suksesvol versameloor 'n een-jaar toetsperiode, beginnende met nuwe toets isolators. Die piek en energie waardes van die lekstroom is identifiseer as die twee hoof parameters wat nodig is om die lekstroomaktiwiteit op die toetsisolators te beskryf. 'n Korrelasie is gevind tussen die klimaat- en omgewingsdata en die lekstroom data, en dit is gevind dat die lekstroom data suksesvol bepaal kan word van sekere van die klimaat- en omgewingsparameters wat gemoniteer is deur veelvoudige regressie tegnieke te gebruik. Oppervlakskonduktiwiteit en energie is gevind die beste parameters te wees om die maksimum en kontinue interaksie van die isolatormateriaaloppervlak met die elektrolitiese besoedelingslaag aan te toon. 'n Natuurlike veroudering en besoedeling toetsprosedure is ontwikkel, wat 'n Suid-Afrikaanse standaard geword het en besig is om internastionale aanvaarding te wen. 'n Model en hipotese word voorgestelom die elektriese ontladingsaktiwiteit wat op die toetsisolators plaasvind te beskryf en om die verskil in lekstroomprestasie van die verskeie materiale te verduidelik. S/eufelwoorde: Isolator, Besoedeling, Hoog Spanning, Leek stroom, Materiaal prestasie.
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Foran, Tira. "Rivers of contention : Pak Mun Dam, electricity planning, and state-society relations in Thailand, 1932-2004." Connect to full text, 2006. http://hdl.handle.net/2123/1984.
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PhDThis study investigates how actions – especially narratives and claims – of civil society advocates influenced electricity generation planning and hydropower project implementation, in the context of a democratising authoritarian state. To pursue this research agenda, I use a critical realist philosophy of science to ground a conceptual framework whose fundamental components consist of institutions, interests, and discourses. The research presents three case studies from Thailand, a nation-state with distinct authoritarian legacies, as well as significant economic and political dynamism in the late 20th century. The cases step from macro to micro levels of analysis: (1) Electricity generation planning: an overview and critique of the social construction of peak power demand and supply options in Thailand, 1960s–2004. I focus on the rise of energy conservation advocacy in the early 1990s, and the rise of more confrontational energy activism in the late 1990s; (2) Pak Mun Dam: contention between EGAT, anti-dam villagers, and other state and civil society actors, 1989–2003; (3) Pak Mun Dam: analysis of how knowledge discourses shaped debates over fisheries and local livelihoods in the lower Mun river basin, 1999–2004. I pursue these cases in the larger context of Thai state–society relations, 1932–early 2000s: from the Khana Ratsadorn (People’s Party) and its founders’ increasingly authoritarian struggles to shape the state; through to the rise of civil society in the Indochina-war era; through the emergence of parliamentary politics and NGO evolution in the 1980s and early 1990s; to the Thai Rak Thai “money politics” party that emerged in 1998. Specific research questions focus on patterns and outcomes of state–society interaction, the role of lay and expert knowledge discourses in structuring conflict, and plausible causal connections between outcomes and concepts used in the conceptual framework. The study is based on fieldwork conducted between 2001 and 2005, with 18 months of intensive work concentrated in 2002 and 2004. Recurrent procedures consisted of collecting policy narratives and arguments and re-constructing actors’ interests (including those of leaders in organizations) via participant observation, interviews, and textual analysis. The thesis argues that anti-dam advocates influenced project implementation practices at Pak Mun Dam by forming social change networks, gaining contingent recognition as new political actors. Through innovative and disruptive action, through claims for transparency and justice, through mass performances of worthiness, unity, and commitment, and through the production of local knowledge, they helped set agendas. They triggered elite intervention, as well as reactive counter-mobilization and occasional violence. The escalation of uncertainty from unintended outcomes challenged elites – aided by deliberative exchanges – to reconsider unfavourable decisions, to reconsider their preferences, and to make concessions. At the same time, a number of events made the Assembly of the Poor, the main anti-dam movement organization, vulnerable to destabilizing action at the local and national levels. These include: the formation of competitive organizations in the lower Mun basin; complex and intractable issues (such as multiple rounds of compensation); and inability to take credit for championing the interests of vulnerable small farmers. Destabilizing interactions occurred particularly in the restricted media space of the post-financial and economic crisis years. Populist platforms put forward by Thai Rak Thai and Prime Minister Thaksin Shinawatra pre-empted the AOP’s influence. Sustainable energy advocates influenced practices of power system planning by teaching new techniques of energy conservation, and diffusing new norms. In the recent period, however, as some of them engaged in more contentious interaction, such as intervening in conflicts over new coal and hydroelectric power plants (in southern Thailand and Laos respectively) they disrupted dominant rationalities, and found themselves confronting some of the same core practices of a power-wielding bureaucracy and an authoritarian state, namely rhetorical strategies that police the boundaries of policy-relevant knowledge. The thesis, intended to contribute to social science methodology and theory, concludes with a critical appraisal of the conceptual framework. I suggest new research agendas for analysts interested in mechanisms of civil society advocacy in the context of democratising states.
Books on the topic "Environmental aspects of Electric power-plants"
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A, Toman Michael, ed. Technology options for electricity generation: Economic and environmental factors. Washington, DC: Resources for the Future, 1991.
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Organisation for Economic Co-operation and Development., ed. Environmental effects of electricity generation. Paris: Organisation for Economic Co-operation and Development, 1985.
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Masters, Evans Kimberly, ed. Power plant permitting. Tulsa, Okla: PennWell Books, 1996.
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Vesterinen, Raili. Energiantuotannon päästöjen mittaaminen: Hiukkas-, rikkidioksidi- ja typen oksidien päästöjen vertailumittaukset. Espoo: Valtion teknillinen tutkimuskeskus, 1989.
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Chalyĭ, Georgiĭ Vladimirovich. Ėnergetika i ėkologii͡a︡. Kishinev: "Shtiint͡s︡a", 1991.
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Hayeur, Gaétan. Summary of knowledge acquired in northern environments from 1970 to 2000. [Montréal]: Hydro-Québec, 2001.
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National Academies Press (U.S.), ed. Environmental impacts of wind-energy projects. Washington, D.C: National Academies Press, 2007.
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Symposium on Integrating Environmental Controls and Energy Production (5th 1991 New Orleans, La.). Integrating environmental controls and energy production : presented at the Fifth Symposium on Integrating Environmental Controls and Energy Production, New Orleans, Louisiana, March 4-5, 1991: Sponsored by the Environmental Control Division, ASME, the Electric Power Research Institute, the Air & Waste Management Association. New York, N.Y: American Society of Mechanical Engineers, 1991.
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Faustini, C. Environmental review of proposed changes to the Easton Utilities Plant No. 2. [Annapolis, MD: Maryland Power Plant Research Program, 2008.
Find full textBook chapters on the topic "Environmental aspects of Electric power-plants"
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Wooley, David R. "A Comparison of Emissions and Externality Costs of Waste-to-Energy and Coal Fired Electric Power Plants." In External Environmental Costs of Electric Power, 168–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76712-8_13.
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Trillos, Juan Camilo Gomez, Dennis Wilken, Urte Brand, and Thomas Vogt. "Life Cycle Assessment of a Hydrogen and Fuel Cell RoPax Ferry Prototype." In Progress in Life Cycle Assessment 2019, 5–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50519-6_2.
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AbstractEstimates for the greenhouse gas emissions caused by maritime transportation account for approx. 870 million tonnes of CO2 tonnes in 2018, increasing the awareness of the public in general and requiring the development of alternative propulsion systems and fuels to reduce them. In this context, the project HySeas III is developing a hydrogen and fuel cell powered roll-on/roll off and passenger ferry intended for the crossing between Kirkwall and Shapinsay in the Orkney Islands in Scotland, a region which currently has an excess of wind and tidal power. In order to explore the environmental aspects of this alternative, a life cycle assessment from cradle to end-of-use using the ReCiPe 2016 method was conducted, contrasting the proposed prototype developed within the project against a conventional diesel ferry and a diesel hybrid ferry. The results show that the use of hydrogen derived from wind energy and fuel cells for ship propulsion allow the reduction of greenhouse gas emissions of up to 89% compared with a conventional diesel ferry. Additional benefits are lower stratospheric ozone depletion, ionizing radiation, ozone formation, particulate matter formation, terrestrial acidification and use of fossil resources. In turn, there is an increase in other impact categories when compared with diesel electric and diesel battery electric propulsion. Additionally, the analysis of endpoint categories shows less impact in terms of damage to human health, to the ecosystems and to resource availability for the hydrogen alternative compared to conventional power trains.
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Casini, G. "Feasibility Aspects of the D-3He Fuel Cycle in Tokamak Power Reactor Plants." In Safety, Environmental Impact, and Economic Prospects of Nuclear Fusion, 159–72. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-0619-1_10.
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Melo, Miguel, Luiz Bueno Silva, Ana Almeida, and Francisco Rebelo. "Ergonomics Aspects in Operators of the Electric Power Control and Operation Centers." In Design, User Experience, and Usability. User Experience in Novel Technological Environments, 169–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39238-2_19.
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Twardowska, Irena. "Environmental Aspects of Power Plants Fly Ash Utilization in Deep Coal Mine Workings." In Biogeochemistry of Trace Elements in Coal and Coal Combustion Byproducts, 29–57. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4155-4_3.
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"Environmental Impact of Power Plants." In Electric Energy, 81–90. CRC Press, 2008. http://dx.doi.org/10.1201/9781420062205-8.
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"Environmental Impact of Power Plants." In Electric Energy, 87–100. CRC Press, 2004. http://dx.doi.org/10.1201/9781420057898-11.
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Adnan, Nadia, Shahrina Md Nordin, Imran Rahman, Pandian Vasant, and Muhammad Amir Noor. "An Integrative Approach to Study on Consumer Behavior towards Plug-In Hybrid Electric Vehicles Revolution." In Applied Behavioral Economics Research and Trends, 183–213. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1826-6.ch010.
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Transport electrification has experienced major deviations for the last few decades. Current investigation towards the implication of green technologies to decrease pollution and increase diffusion of renewable energy in the transportation sector are achieving more attention. The significance of plug-in hybrid electric vehicles (PHEVs) play a key role towards the policy option to reduce the environmental concern. There are major uncertainties in the diffusion of PHEVs timing of market distribution among consumers. However, there has been a considerable effort made towards the benefit of PHEVs demand. Yet, the debates on consumer behavioral economics towards the adoption of electric vehicles are less recognized. Researchers highlight the significance of PHEVs from a combined perspective considering PHEVs which allows bi-directional flow of electricity. However, it mainly focuses on interface among technology adoption and consumer behavior includes many other aspects such as individual adoption behavior, vehicles performance, environmental concern and power system demand.
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Singh, Gurdeep. "Environmental Aspects of Coal Combustion Residues from Thermal Power Plants." In Thermal Power Plants - Advanced Applications. InTech, 2013. http://dx.doi.org/10.5772/56038.
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Josimović, Boško, and Saša Milijić. "Spatial Aspects of Environmental Impact of Power Plants." In Recent Improvements of Power Plants Management and Technology. InTech, 2017. http://dx.doi.org/10.5772/intechopen.68283.
Full textConference papers on the topic "Environmental aspects of Electric power-plants"
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Pace, Stanley, and Arden Walters. "Repowering Fossil Steam Power Plants With Combustion Turbine-Based Technologies." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-020.
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Increased competition fostered by changes in legislation governing power generation entities has engendered a need to closely assess the economics of operating older-electric generating units. Decisions must be made as to whether these units should be retired and replaced with new, greenfield generation capacity, whether capacity should be purchased from other generation companies, or whether such units should be repowered in some way. The repowering alternative has merit when economic factors and environmental considerations show it to project the least cost of electricity over other choices. The chief advantages of repowering, include use of existing real estate and infrastructure, existing transmission facilities and staffing. Since the repowered plant usually emits less stack gas pollutants per unit of energy generated then the original plant, environmental benefits can also accrue. Various types of gas turbine based repowering options for steam electric plants are presented. All the approaches discussed involve the addition of gas turbines to the cycle and the consequent benefit of some form of combined cycle operation. This option includes boiler retirement (and replacement with combined cycle), hot or warm windbox repowering (the boiler is retained and a gas turbine topping cycle is added), feedwater heating repowering (the gas turbine exhaust heats feedwater), and site repowering (only the site infrastructure is re-used as the site for a combined cycle). Business considerations are discussed in terms of their impact on the decision to repower and technology selection. An example involving feedwater heater repowering is used to illustrate the interaction between the business and technical aspects of repowering.
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Widiyanto, Anugerah, Seizo Kato, and Naoki Maruyama. "Optimizing Selection of Appropriate Power Generation Systems in Indonesia by Using Distance Based Approach Method." In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26167.
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A deterministic quantitative model has been developed for use to compare the technical, economical and environment feature of various electric power generating plants. The model, which is based on matrix operations, is used in evaluating the various aspects of energy sources available for the electricity generation systems in a developing country. Several energy sources are chosen which could be considered for production of electricity to meet current and future electricity demands. A complete set of energy sources will include fossil fuel fired power plants, nuclear power plants, and natural-renewable energy power plants. A customized computer code is developed to evaluate the overall function for each system from the performance corresponding to the selected energy attributes includes five area of concerns; energy economy, energy security, environmental protection, socio-economic development and technological aspects for the electric power generations. The model developed in this study is applied to the Indonesian’s electric power sector development. Most of the data required for the model application are obtained from various sources related to power industry in Indonesia, such as the Electricity Generating Authority of Indonesia (Perusahaan Listrik Negara, PLN), Government of Indonesia, World Bank, Asian Development Bank, United Nations, and other sources, both in published and public domains. The optimization technique is kept flexible so that it can accommodate other attributes that will be found to be important according to the decision maker’s preference. By so doing, the model virtually can be used to attack any decision problem with various different attributes to reach an optimal decision concerning the selection of energy sources for electricity generation. The result of this study will be a rank of energy sources for Indonesia power generation systems based on the composite distance of each alternative to the designated optimal source of energy.
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Okamoto, Satoru. "Economical and Environmental Aspects of Heat Pump System Utilizing Unused Energy in Aquarium." In ASME 2004 Power Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/power2004-52101.
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This paper introduces a heat pump system with a latent heat storage utilizing seawater installed in an aquarium. Heat from the seawater is collected and used as the heat source for the heat pump system. This maintains the indoor conditions at constant temperature and relative humidity. With regard to the heat pump system using low-temperature unutilized heat source, development is introduced on a heat source load responsive heat pump system, with combines a load variation responsive heat pump utilizing seawater with a latent heat (ice plus water slurry) storage system using nighttime electric power serving for electric power load leveling. The desired outcome would be to show that the costs of generating heat energy with the seawater-source heat pump are significantly less than those with the air-source heat pump and the oil-fired system. Additionally, the CO2 emissions for the seawater-source heat pump compare favourably as they maybe less than those for the other conventional assumed systems described.
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Chiesa, Paolo, and Ennio Macchi. "A Thermodynamic Analysis of Different Options to Break 60% Electric Efficiency in Combined Cycle Power Plants." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30663.
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All major manufacturers of large size gas turbines are developing new techniques aimed at achieving net electric efficiency higher than 60% in combined cycle applications. An essential factor for this goal is the effective cooling of the hottest rows of the gas turbine. The present work investigates three different approaches to this problem: (i) the most conventional open-loop air cooling; (ii) the closed-loop steam cooling for vanes and rotor blades; (iii) the use of two independent closed-loop circuits: steam for stator vanes and air for rotor blades. Reference is made uniquely to large size, single shaft units and performance is estimated through an updated release of the thermodynamic code GS, developed at the Energy Dept. of Politecnico di Milano. A detailed presentation of the calculation method is given in the paper. Although many aspects (such as reliability, capital cost, environmental issues) which can affect gas turbine design were neglected, thermodynamic analysis showed that efficiency higher than 61% can be achieved in the frame of current, available technology.
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Ruggeri, Gaetano, and Luigi Brusa. "Management of Radioactive Waste and Materials Arising From the Decommissioning of Italian Nuclear Power Plants." In ASME 2001 8th International Conference on Radioactive Waste Management and Environmental Remediation. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/icem2001-1183.
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Abstract Scope of the paper is to summarise the experience about management of materials arising from decommissioning of Italian NPPs, and to illustrate criteria, procedures and systems, which Sogin is defining to manage the problem of the clearance of sites and materials, considering the international experience and boundary conditions existing in the Country. Since 1962 Enel (the largest Italian utility for electric power) has operated the four Italian nuclear power plants: Garigliano (160 MWe BWR), Latina (210 MWe GCR), Trino (270 MWe PWR) and Caorso (882 MWe BWR). These NPPs were shutdown in the 80’s: Garigliano NPP was shutdown in 1982 following a decision made by Enel, based on technical and economical reasons, Latina, Trino and Caorso NPPs following decisions made by the Italian Government after the Chernobyl accident. The “deferred decommissioning (SAFSTOR)” was the decommissioning strategy selected by Enel and approved by the competent Authorities, due to the lack of a repository for the disposal of radioactive materials and of release limits for clearance of materials. Activities have been started aimed at reaching the “Safe Enclosure” condition, which would have lasted for some decades, before final dismantling of plants. In 1999 the liberalisation of the Italian electricity market led Enel to separate its nuclear activities, forming a new Company, named Sogin, to which decommissioning Italian NPPs was committed. At the same time, considering pressures, both at national and local level, to adopt the “prompt decommissioning (DECON)” strategy, in December 1999 the Italian Minister of Industry, with the intent to accelerate the dismantling of Italian NPPs, presented the plans to create a national repository for nuclear waste, and asked Sogin to revise the decommissioning plans, according to the new global strategy, taking into account all the relevant technical, organisational, financial and legislative aspects of the problem. As the DECON strategy enhances the importance of “clean-up” both of sites and materials, the related aspects are held in due consideration in developing the decommissioning plans, which deal with the following: • characterisation of plant systems, components and structures; • decontamination and dismantling techniques; • monitoring of dismantled materials for clearance; • treatment of dismantled, radioactive materials (which cannot be cleared), prior to disposal; • treatment and conditioning of radioactive waste, prior to disposal; • final clearance of sites. Authorisation requirement related to the release, recycle and reuse of materials produced during plant decommissioning, together with the acceptance criteria for disposal of radioactive materials, are of key importance, considering that the change in decommissioning strategy increases the quantity of radioactive waste to be disposed of, the costs for waste treatment, transportation and disposal, and the capacity of the national repository. In this connection, Sogin is discussing with competent Authorities and Bodies in order to define clearance criteria and disposal acceptance criteria, which neither impair nor complicate the future dismantling operations. In (1) details are given about Italian decommissioning Regulation, decommissioning strategy and Organisation, in order to show the boundary conditions, which exist in Italy for planning and development of NPPs Decommissioning Projects. In the following paragraphs the decommissioning strategy is summarised first together with some critical items of decommissioning; then the Italian regulation about the management of radioactive waste is reported. The management of waste and materials, which will arise from the decommissioning of Italian nuclear power plants, is driven by the requirements imposed by the competent Authorities basing on this regulation.
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Lonia, B., N. K. Nayar, S. B. Singh, and P. L. Bali. "Techno Economic Aspects of Power Generation From Agriwaste in India." In 17th International Conference on Fluidized Bed Combustion. ASMEDC, 2003. http://dx.doi.org/10.1115/fbc2003-170.
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The agricultural operations in India are suffering from a serious problem of shortage of electrical power on one side and economic and effective disposal of agriwaste stuff on the other. India being agriculture based country, 70% of its main income (share in GDP) comes from agriculture sector. Any enhancement of income from this sector is based upon adequate supply of basic inputs in this sector. Regular and adequate power supply is one such input. But, the position of power supply in our country defies both these characteristics. With a major portion of power produced being sent to the industrial and urban consumers, there is a perennial shortage of power in the agriculture sector. Consequently, there is an emergent need to produce more power in order to fulfil the needs of this sector effectively. One way of accomplishing this is setting up captive, preferably rural based, small power generation plants. In these power plants, instead of water-head, diesel oil or coal, we can use agri-residue to produce electricity. One such power plant (1–2 MW capacity) can satisfy the power need of 25 to 40 nearby villages. The agriwaste like rice straw, sugarcane-trash, coir-pith, peanut shells, wheat stalks & straw, cottonseed, stalks and husk, soyabean stalks, maize stalks & cobs, sorghum. Bagasse, wallnut shells, sunflower seeds, shells, hulls and kernels and coconut husk, wastewood and saw dust can be fruitfully utilized in power generation. This stuff is otherwise a waste and liability and consumes a lot of effort on its disposal; in addition to being a fire and health hazard. Agriwaste stuff which at present is available in abundance and prospects of its utilization in producing energy are enormous. This material can be procured at reasonably low rates from the farmers who will thus be benefited economically, apart from being relieved of the responsibility of its disposal. Agri-residue has traditionally been a major source of heat energy in rural areas in India. It is a valuable fuel even in the sub-urban areas. Inspite of rapid increase in the supply of, access lo and use of fossil fuels, agri-residue is likely to continue to play an important role, in the foreseeable future. Therefore, developing and promoting techno-economically-viable technologies to utilize agri-residue efficiently should be a persuit of high priority. Though there is no authentic data available with regard to the exact quantity of agricultural and agro-industrial residues, its rough estimate has been put at about 350 mt per annum. It is also estimated that the total cattle refuse generated is nearly 250 mt per year. Further, nearly 20% of the total land is under forest cover, which produces approximately 50 mt of fuel wood and with associated forest waste of about 5 mt.(1). Taking into account the utilization of even a portion (say 30%) of this agri-residue & agro-industrial waste as well as energy plantation on one million hectare (mha) of wastelands for power generation through bioenergy technologies, a potential of some 18000 MW of power has been estimated. From the foregoing, it is clear that there is an enormous untapped potential for energy generation from agri-residue. What is required is an immediate and urgent intensification of dedicated efforts in this field, with a view to bringing down the unit energy cost and improving efficiency and reliability of agri-waste production, conversion and utilisation, leading to subsequent saving of fossil fuels for other pressing applications. The new initiatives in national energy policy are most urgently needed to accelerate the social and economic development of the rural areas. It demands a substantial increase in production and consumption of energy for productive purposes. Such initiatives are vital for promoting the goals of sustainability. cleaner production and reduction of long-term risks of environmental pollution and consequent adverse climatic changes in future. A much needed significant social, economic and industrial development has yet to take place in large parts of rural India; be it North, West, East or South. It can be well appreciated that a conscious management of agri-residue, which is otherwise a serious liability of the farmer, through its economic conversion into electric power can offer a reasonably viable solution to our developmental needs. This vision will have to be converted into a reality within a decade or so through dedicated and planned R&D work in this area. There is a shimmering promise that the whole process of harvesting, collection, transport and economic processing and utilisation of agri-waste can be made technically and economically more viable in future. Thus, the foregoing paras amply highlight the value of agri-residue as a prospective source of electric power, particularly for supplementing the main grid during the lean supply periods or peak load hours and also for serving the remote areas in the form of stand-alone units giving a boost to decentralised power supply. This approach and option seems to be positive in view of its potential contribution to our economic and social development. No doubt, this initiative needs to be backed and perused rigorously for removing regional imbalances as well as strengthening National economy. This paper reviews the current situation with regards to generation of agriwaste and its prospects of economic conversion into electrical power, technologies presently available for this purpose, and the problems faced in such efforts. It emphasizes the need for an integrated approach to devise ways and means for generating electrical power from agriwaste; keeping in mind the requirements of cleaner production and environmental protection so that the initiative leads to a total solution.
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Purayil, Prasannakumar K., and Sujith Pratap Chandran. "Managing Energy Transition - Adapting Power to Gas Technology PTG - Project Management Review of Complexity, Technology and Integration Aspects." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207806-ms.
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Abstract Managing climate change is a growing global concern. The Paris Agreement, the first ever legally binding global climate change agreement, enforced longer term actions for energy firms in terms of implementing newer means and technologies to reduce reliance on fossil fuel-based energy. In this regard, much attention is drawn to commercialized Power-To-Gas (PTG) - Hydrogen generated from renewable energy-based electrolysis can be introduced into natural gas utilities, thereby ensuring "Greener" natural gas mix. The integration of PTG plants and natural gas-fired power plants presents an attractive model to implement this. This paper analyzes the associated project management challenges, ranging from complexity issues to technology management and with a view on better integration and risk reduction. Power-to-Gas (PTG) is the process of converting surplus renewable energy into hydrogen gas through electrolysis. PTG plants and natural gas-fired power plants can form a closed loop between an electric power system and an interconnected multi-energy system, and this is believed to be a sustainable solution towards environment friendly energy systems. Power-to-Gas (PTG) technology is yet to mature in terms of its commercial viability. As such, traditional project management processes and methodologies also need to be reviewed and adapted to suit the economic and execution models needed for project success. The dimensions that will be analyzed in this paper include project integration management, project complexity management, technology management and risk management strategies. A model for Joint Venture management will also be proposed. PTG projects, as an effective means of transitioning to a ‘greener’ natural gas mix and the associated project life cycle process will be defined based on an integrated FEL (iFEL) model. Project risk management perspectives, its stakeholder influences and methods to mitigate risks towards better decision-making process shall be explored. This work proposes establishment of a dedicated, technically competent and scalable Global PMO to oversee the PTG projects’ prioritization, concept/technology selection, JV management, contracting strategies, formulation of a proactive management response system and overall value assurance.
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Hussein Mohammed Al-Taesh, Najmaldin. "Using Photovoltaic Systems in Famagusta Residential Buildings as Electric Power." In 3rd International Conference of Contemporary Affairs in Architecture and Urbanism – Full book proceedings of ICCAUA2020, 6-8 May 2020. Alanya Hamdullah Emin Paşa University, 2020. http://dx.doi.org/10.38027/n352020iccaua3163632.
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Solar energy is an influential sort of renewable energy which is also richly available in North Cyprus. Contrariwise, there are no natural oil resources in Cyprus; over 90% of the country's main energy is imported to the island which needs high financial government credit [1]. Indeed, high CO2 emissions and their side effects on the global environment as well as destruction role on the ozone layer are among major problems of using non-renewable energy. Considering the geographic location of North Cyprus, it has over 300 sunny days out of 365 days of a year; therefore, there is a considerable potential to integrate solar tracking systems into various parts of industrials or residential portions in the country. In a time when using more renewable sources of energy is important to decline obvious environmental problems, it seems to be beneficial to use photovoltaic systems such as "Building Integrated Photovoltaic". As housing consumes over 40 percent of the produced energy, local sustainable properties deal with enhancing the quality of dwellers life. Based on what has been discussed, the objective of this study is to achieve a high degree of efficient local energy through BIPV so to supply a proportion of buildings' heating and electricity power consumptions. The main concern is considering cultural patterns and local climate aspects in the design process so to reach to a suitable energy solution in each individual case. Accordingly, some criteria which directly affect the produced power ability of photovoltaic systems would be discussed, in particular, determining the direction, the slope of photovoltaic panels, shading, its integration with active solar systems, and buildings' form and facades. Additionally, as the case study, Coloured Building would be presented to show that how those mentioned solutions can integrate to the building in order to refine its energy consumption. Consequently, architects and designers, looking for buildings' self-efficiency and sustainability, should know how to incorporate photovoltaic systems to the building and to consider which criteria in this case. Indeed, the corporation between architects and other engineers who work on a common project is the key role in developing a construction toward a sustainable environment.
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Zvorykina, Anastasiia, Sahil Gupta, Wargha Peiman, Igor Pioro, and Natalia Fialko. "Current Status and Future Applications of Supercritical Pressures in Power Engineering." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54558.
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It is well known that the electrical-power generation is the key factor for advances in any other industries, agriculture and level of living. In general, electrical energy can be produced by: 1) non-renewable sources such as coal, natural gas, oil, and nuclear; and 2) renewable sources such as hydro, wind, solar, biomass, geothermal and marine. However, the main sources for electrical-energy production are: 1) thermal - primary coal and secondary natural gas; 2) nuclear and 3) hydro. The rest of the sources might have visible impact just in some countries. Therefore, thermal and nuclear electrical-energy production as the major source is considered in the paper. From thermodynamics it is well known that higher thermal efficiencies correspond to higher temperatures and pressures. Therefore, modern SuperCritical (SC)-pressure coal-fired power plants have thermal efficiencies within 43–50% and even slightly above. Steam-generator outlet temperatures or steam-turbine inlet temperatures have reached a level of about 625°C (and even higher) at pressures of 25–30 (35–38) MPa. This is the largest application of SC pressures in industry. In spite of advances in coal-fired power-plants they are still considered as not environmental friendly due to producing a lot of carbon-dioxide emissions as a result of combustion process plus ash, slag and even acid rains. The most efficient modern thermal-power plants with thermal efficiencies within a range of 50–60%, are so-called, combined-cycle power plants, which use natural gas as a fuel. Natural gas is considered as a clean fossil fuel compared to coal and oil, but still due to combustion process emits a lot of carbon dioxide when it used for electrical generation. Therefore, a new reliable and environmental friendly source for the electrical-energy generation should be considered. Nuclear power is also a non-renewable source as the fossil fuels, but nuclear resources can be used for significantly longer time than some fossil fuels plus nuclear power does not emit carbon dioxide into atmosphere. Currently, this source of energy is considered as the most viable one for electrical generation for the next 50–100 years. Current, i.e., Generation II and III, Nuclear Power Plants (NPPs) consist of water-cooled reactors NPPs with the thermal efficiency of 30–35% (vast majority of reactors); subcritical carbon-dioxide-cooled reactors NPPs with the thermal efficiency up to 42% and liquid-sodium-cooled reactor NPP with the thermal efficiency of 40%. Therefore, the current fleet of NPPs, especially, water-cooled NPPs, are not very competitive compared to modern thermal power plants. Therefore, next generation or Generation-IV reactors with new parameters (NPPs with the thermal efficiency of 43–50% and even higher for all types of reactors) are currently under development worldwide. Generation-IV nuclear-reactor concept such as SuperCritical Water-cooled Reactor (SCWR) is intended to operate with direct or in-direct SC-“steam” Rankine cycle. Lead-cooled Fast Reactor (LFR) can be connected to SC-“steam” Rankine cycle or SC CO2 Brayton cycle through heat exchangers. In general, other Generation IV reactor concepts can be connected to either one or another cycle through heat exchangers. Therefore, this paper discusses various aspects of application of SC fluids in power engineering.
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Kasitz, Joshua, and David Huitink. "Characterization of High-Density Aircraft Electronic and Thermal Management Systems." In ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/ipack2021-73287.
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Abstract As aircrafts move toward electrification with the research and development of hybrid-electric powertrains, the focus has begun to shift to the reliability challenges of electronic devices subject to flight. Electronic components in aircraft applications are subject to two main sources of failure inducing stresses: the thermomechanical stresses that develop due to unequal coefficients of thermal expansion of different materials used in the components, and the stresses developing due to shocks and vibrations during flight as well as landing and takeoff. While the challenge of dealing with CTE mismatches is applicable to electronic devices in general, the ambient conditions surrounding the aircraft in flight, combined with weight and space constrains add significant logistical issues to any cooling mechanism. This paper will focus on the environmental influence on the thermal dissipation profile that will ultimately lead to CTE failures. The push toward more-electric-aircraft (MEA) increases the need to further advance the power and versatility of electronic cooling systems to adequately manage high density power modules, which until recently were not highly incorporated in aviation systems. Environmental conditions will play a large role in the design space and limitations of potential cooling solutions and will dictate the effectiveness of current thermal management systems. In arising scenarios where high-density electronics cannot be contained within a pressurized and temperature-controlled cabin, drastic pressure and temperature swings, facilitated by the external environment, will lead to an extra source of fluctuating stress on the cooling system. This is likely to be a prevalent factor in hybrid-electric and all-electric powertrains as requiring environmental controlled spaces for major components could be limited. This can easily be seen in current attempts to examine and redesign local cooling systems for electric motors in aviation. Representing just one of the major cooling requirements on an electric aircraft, motor cooling systems demonstrate the universal cooling problems limiting all aspects of the powertrains system. This paper aims to define the impact of the changing environment, through a flight profile of an aircraft, on high density electronic cooling systems by assessing the potential system stressors that significantly impact performance, efficiency, and reliability of the cooling systems. It will also utilize local cooling efforts for motors to relate the general problems to applicable design considerations that must be understood to further the performance capability of the overall propulsion system.
Reports on the topic "Environmental aspects of Electric power-plants"
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Minz, Dror, Stefan J. Green, Noa Sela, Yitzhak Hadar, Janet Jansson, and Steven Lindow. Soil and rhizosphere microbiome response to treated waste water irrigation. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7598153.bard.
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Research objectives : Identify genetic potential and community structure of soil and rhizosphere microbial community structure as affected by treated wastewater (TWW) irrigation. This objective was achieved through the examination soil and rhizosphere microbial communities of plants irrigated with fresh water (FW) and TWW. Genomic DNA extracted from soil and rhizosphere samples (Minz laboratory) was processed for DNA-based shotgun metagenome sequencing (Green laboratory). High-throughput bioinformatics was performed to compare both taxonomic and functional gene (and pathway) differences between sample types (treatment and location). Identify metabolic pathways induced or repressed by TWW irrigation. To accomplish this objective, shotgun metatranscriptome (RNA-based) sequencing was performed. Expressed genes and pathways were compared to identify significantly differentially expressed features between rhizosphere communities of plants irrigated with FW and TWW. Identify microbial gene functions and pathways affected by TWW irrigation*. To accomplish this objective, we will perform a metaproteome comparison between rhizosphere communities of plants irrigated with FW and TWW and selected soil microbial activities. Integration and evaluation of microbial community function in relation to its structure and genetic potential, and to infer the in situ physiology and function of microbial communities in soil and rhizospere under FW and TWW irrigation regimes. This objective is ongoing due to the need for extensive bioinformatics analysis. As a result of the capabilities of the new PI, we have also been characterizing the transcriptome of the plant roots as affected by the TWW irrigation and comparing the function of the plants to that of the microbiome. *This original objective was not achieved in the course of this study due to technical issues, especially the need to replace the American PIs during the project. However, the fact we were able to analyze more than one plant system as a result of the abilities of the new American PI strengthened the power of the conclusions derived from studies for the 1ˢᵗ and 2ⁿᵈ objectives. Background: As the world population grows, more urban waste is discharged to the environment, and fresh water sources are being polluted. Developing and industrial countries are increasing the use of wastewater and treated wastewater (TWW) for agriculture practice, thus turning the waste product into a valuable resource. Wastewater supplies a year- round reliable source of nutrient-rich water. Despite continuing enhancements in TWW quality, TWW irrigation can still result in unexplained and undesirable effects on crops. In part, these undesirable effects may be attributed to, among other factors, to the effects of TWW on the plant microbiome. Previous studies, including our own, have presented the TWW effect on soil microbial activity and community composition. To the best of our knowledge, however, no comprehensive study yet has been conducted on the microbial population associated BARD Report - Project 4662 Page 2 of 16 BARD Report - Project 4662 Page 3 of 16 with plant roots irrigated with TWW – a critical information gap. In this work, we characterize the effect of TWW irrigation on root-associated microbial community structure and function by using the most innovative tools available in analyzing bacterial community- a combination of microbial marker gene amplicon sequencing, microbial shotunmetagenomics (DNA-based total community and gene content characterization), microbial metatranscriptomics (RNA-based total community and gene content characterization), and plant host transcriptome response. At the core of this research, a mesocosm experiment was conducted to study and characterize the effect of TWW irrigation on tomato and lettuce plants. A focus of this study was on the plant roots, their associated microbial communities, and on the functional activities of plant root-associated microbial communities. We have found that TWW irrigation changes both the soil and root microbial community composition, and that the shift in the plant root microbiome associated with different irrigation was as significant as the changes caused by the plant host or soil type. The change in microbial community structure was accompanied by changes in the microbial community-wide functional potential (i.e., gene content of the entire microbial community, as determined through shotgun metagenome sequencing). The relative abundance of many genes was significantly different in TWW irrigated root microbiome relative to FW-irrigated root microbial communities. For example, the relative abundance of genes encoding for transporters increased in TWW-irrigated roots increased relative to FW-irrigated roots. Similarly, the relative abundance of genes linked to potassium efflux, respiratory systems and nitrogen metabolism were elevated in TWW irrigated roots when compared to FW-irrigated roots. The increased relative abundance of denitrifying genes in TWW systems relative FW systems, suggests that TWW-irrigated roots are more anaerobic compare to FW irrigated root. These gene functional data are consistent with geochemical measurements made from these systems. Specifically, the TWW irrigated soils had higher pH, total organic compound (TOC), sodium, potassium and electric conductivity values in comparison to FW soils. Thus, the root microbiome genetic functional potential can be correlated with pH, TOC and EC values and these factors must take part in the shaping the root microbiome. The expressed functions, as found by the metatranscriptome analysis, revealed many genes that increase in TWW-irrigated plant root microbial population relative to those in the FW-irrigated plants. The most substantial (and significant) were sodium-proton antiporters and Na(+)-translocatingNADH-quinoneoxidoreductase (NQR). The latter protein uses the cell respiratory machinery to harness redox force and convert the energy for efflux of sodium. As the roots and their microbiomes are exposed to the same environmental conditions, it was previously hypothesized that understanding the soil and rhizospheremicrobiome response will shed light on natural processes in these niches. This study demonstrate how newly available tools can better define complex processes and their downstream consequences, such as irrigation with water from different qualities, and to identify primary cues sensed by the plant host irrigated with TWW. From an agricultural perspective, many common practices are complicated processes with many ‘moving parts’, and are hard to characterize and predict. Multiple edaphic and microbial factors are involved, and these can react to many environmental cues. These complex systems are in turn affected by plant growth and exudation, and associated features such as irrigation, fertilization and use of pesticides. However, the combination of shotgun metagenomics, microbial shotgun metatranscriptomics, plant transcriptomics, and physical measurement of soil characteristics provides a mechanism for integrating data from highly complex agricultural systems to eventually provide for plant physiological response prediction and monitoring. BARD Report