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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

China’s Wind Energy Development and Prediction

Wallin, Micah R. 03 September 2010 (has links)
No description available.
42

India’s transformation towards clean energy for a sustainable future: understanding and analyzing the role of intangible cultural heritage

Guliyeva, Azima January 2022 (has links)
The focus has predominantly been on Southeast Asian countries like Japan and China. Meanwhile, such South Asian countries as India, Indonesia, and Pakistan, which are important from the point of view of understanding the processes of modernization, are undeservedly overlooked. Academics have maintained the necessity to study intangible cultural heritage, citing a new global context marked by a growing urban population and a changing climate as justification. UNESCO has also recognized the value of intangible cultural heritage (ICH) since 2003. Nonetheless, the link between ICH and green energy transition discourses is new. The aim of this study is to analyze how the intangible cultural heritage of Indian civilization affects the energy sector and to which conclusion it leads. Specifically, the paper is trying to expand on focusing on the clean energy sector in India. A systematic literature review (SLR) and the quantitative research method were used to answer the research questions in this work. Considerations for future approaches to ICH and the green energy sector are presented.
43

Design and analysis of small scale wind turbine support structures

Nel, Emma 12 1900 (has links)
Thesis (MScEng)--Stellenbosch University, 2012 / ENGLISH ABSTRACT: A technology that has advanced immeasurably as a result of the necessity for green energy production is the harnessing of wind energy. One of the most important aspects of a wind turbine is its supporting structure. The tower of a wind turbine needs to be sufficiently reliable and structurally sound to ensure that the design life of the wind turbine machine is unaffected. The tower also needs to be of the correct height to ensure that the full potential of energy capture is realised. The supporting structure of a wind turbine constitutes up to as much as 30% of the total costs of a wind turbine. The most common wind turbine supporting structures seen worldwide today are Steel Monopole Towers. The large cost proportion of the tower compels the industry to investigate the most feasible alternative supporting tower structures and thus prompted the research developed in this thesis. In this thesis the focus is on small scale wind turbines (<50kW), more specifically, a 3kW Wind Turbine. The proposed alternative design the support structures of small scale wind turbines to the presently used Steel Monopole tower was a Steel Lattice tower. Both a Steel Lattice and Steel Monopole Tower was designed for a 3kW Wind Turbine using rational design methods determined from pertinent sections of the South African design codes. The Tower designs needed to incorporate the details of the element connections, so as to encompass all of the cost parameters accurately. The foundation design of each of the towers was also required from the point of view of cost analysis completeness, and ended up playing a critical role in the feasibility analysis. To validate the design methods, the two towers were modelled in the finite element package Strand7 and a number of different analyses were performed on the two towers. The analyses included linear static, nonlinear static, natural frequency and harmonic frequency analyses. The towers were assessed for a number of different load case combinations and were examined in terms of stress states, mass participation factors and deflections, to mention a few, for the worst loading combination cases that were encountered. Once a final design was reached for both the Steel Lattice and Steel Monopole Towers, each element from which they were made was assessed from a structural viewpoint to determine manufacturing and construction costs. The cost analysis was conducted by means of asking a number of leading construction companies for unit prices for each of the identified elements to be assessed. The fabrication and construction of each of the Towers was then compared to determine which one was more feasible, in terms of each design aspect considered as well as looking at the complete end product. It was found that the Steel Lattice Tower was more feasible from the points of view of fabrication, and construction, as well as having a far more cost effective foundation. This was a positive conclusion from the perspective of the proposal for a more feasible alternative to the presently used Steel Monopole Towers. The outcome of the research conducted here could certainly prove to be worth considering from a wind farm development perspective, with particular focus on the up and coming Wind Industry developments in South Africa. / AFRIKAANSE OPSOMMING: As gevolg van die noodsaaklikheid vir die produksie van volhoubare energie is ʼn tegnologie wat met rasse skrede vooruitgegaan het die vir die benutting van windenergie. Een van die belangrikste aspekte van 'n windturbine is die ondersteunende struktuur. Die toring van 'n windturbine moet funksioneel en struktureel betroubaar wees om te verseker dat die ontwerpleeftyd van die windturbine masjien nie nadelig beïnvloed word nie. Die toring moet ook die regte hoogte wees om te verseker dat die volle potensiaal van die wind energie in meganiese energie omgesit word. Die koste van die ondersteunende struktuur van 'n windturbine verteenwoordig tot 30% van die totale koste van 'n windturbine. Die mees algemene vorm van ondersteunende strukture vir windturbines wat vandag wêreldwyd teëgekom word, is die van 'n enkel staal buisvormige toring. Die groot koste‐komponent van die toring dwing die industrie om ondersoek in te stel na die mees koste effektiewe prakties uitvoerbare alternatief vir die ondersteunende toring struktuur. Hierdie aspek van die struktuur konseptualisering het gelei tot die navorsing wat in hierdie tesis onderneem is. Die fokus van die navorsing is op klein skaal windturbines (<50kW), en meer spesifiek op 'n 3kW windturbine model. Die alternatiewe ontwerp wat ontwikkel is vir klein skaal wind turbines se ondersteunende structure, is 'n staal vakwerk toring as alternatief vir die staal buisvormige toring. Beide 'n staal vakwerk en staal buisvormige toring vir 'n 3kW wind turbine is ontwerp deur rasionele ontwerp metodes. Die toepaslike gedeeltes van die Suid‐Afrikaanse ontwerp kodes is hiervoor gebruik. Die ontwerp vir die toring moet die besonderhede van die element verbindings in ag neem en die nodige koste parameters moet akkuraat bepaal word. Die ontwerp van die fondament van elke toring is ook noodsaaklik vir die volledigheid van die koste‐ontleding en dit speel ook 'n kritieke rol in die gangbaarheid analise. Om die ontwerp metodes te bevestig, is die twee tipes torings in die eindige element pakket, Strand7, gemodelleer en 'n aantal verskillende ontledings vir die twee torings is uitgevoer. Die ontledings sluit lineêr en nie‐lineêr statiese ontledings asook natuurlike frekwensie en dinamiese ontledings onder harmoniese belastings in. Die torings is vir 'n aantal verskillende lasgevalkombinasies ondersoek en in die spannings toestande, massadeelname faktore en defleksies vir die ergste laskombinasie gevalle wat ondervind is, is geassesseer. Sodra 'n finale ontwerp vir beide die staal vakwerk en staal buisvormige toring voltooi is, is elke element beoordeel uit 'n strukturele en materiaal oogpunt om die kostes daarvan te bepaal. Die koste‐analise is baseer op data wat voorsien is deur 'n aantal vooraanstaande konstruksiemaatskappye op 'n prys per eenheid basis vir elk van die geïdentifiseerde elemente wat geassesseer moes word. Die vervaardiging en konstruksie van elke toring is dan vergelyk om te bepaal watter een die mees haalbaar is, in terme van elke toepaslike ontwerpsaspek en deur ook die volledige eindproduk te evalueer. Daar is bevind dat die staal vakwerk toring uit die oogpunt van vervaardiging en konstruksie, asook as gevolg van 'n meer koste‐effektiewe fondament, die voorkeur alternatief verteenwoordig het. Dit was 'n positiewe gevolgtrekking uit die oogpunt van die soeke na 'n ander alternatief as die buisvormige staal torings wat tans algemeen in gebruik is. Die uitkoms van hierdie navorsing verdien oorweging uit ʼn windplaas ontwikkelingsperspektief, met ʼn spesifieke fokus op die opkomende ontwikkelinge in die wind energie industrie in Suid‐Afrika.
44

Green Decision Making by Organizations: Understanding Strategic Energy Choices

Gliedt, Travis 20 September 2011 (has links)
There is a growing need to better understand environmental decision making in the context of climate change and limited renewable resources. This dissertation deepens our understanding of such decision making by focusing on strategic green decisions, which can be defined as the individual and collaborative green decisions within or between organizations that help organizations improve their operating position, adapt to changes in their external institutional environments, and simultaneously generate environmental benefits. The particular focus is on decisions related to energy in the North American context. The research draws on and contributes to organizational theory with the aim of better understanding those factors that motivate and/or facilitate green decisions by organizations, especially social economy organizations—an area of only limited research to date. Two complementary empirical studies address the overarching research goal. The first study focuses on understanding the nature and extent of the association between organizational attributes and those factors that motivate and/or facilitate a green energy decision. Insights are based on a bi-national survey of 212 organizations that voluntarily began to purchase green electricity between 1999 and 2008. Findings indicate that important influences are similar across organizational types. Survey results highlight the importance of organizational culture and internal champions—both individually and in combination—in making the initial decision to purchase green electricity, despite its relatively higher price. These two factors, as well as strategic benefits, emerge as the dominant explanations for why organizations expand their green energy purchases. The relative importance and particular roles of these factors vary across organizational and decision types. The second empirical study extends our understanding of how organizations adapt to external changes while maintaining the capacity to innovate in order to address their core objectives. The focus is on the residential energy services market, and is based on 12 interviews with the executive directors of non-profit environmental service organizations (ESOs) that are part of a national network called Green Communities Canada. These organizations survived a funding shock by creating new services and diversifying funding sources with actions that collectively can be referred to as ‘green collaborative entrepreneurship’; collaborative because it was facilitated by strategic partnerships with businesses and local governments, as well as the cross-national social capital network connecting the ESOs. The important motivating factors of green collaborative entrepreneurship were the green values and objectives that drive these organizations. The facilitating factors of green collaborative entrepreneurship included human capital, social capital and strategic partnerships, which acted as dynamic capabilities because of their flexibility to help increase the level of entrepreneurship when necessary for organizational survival, and yet, scale-up and deliver core programs during stable funding periods. The dissertation provides important insights into broad questions related to green decisions, especially for organizations that are affected by political policy cycles. The findings highlight that organizations are able to be more environmentally sustainable while also improving their own strategic performance by making green decisions that either provide the capacity to adapt to exogenous change for survival, or to create endogenous change for competitive advantage. The research contributes to our understanding of societal transitions to sustainable development by highlighting two green decisions that are occurring in the social economy. The dissertation contributes to organizational theory and in particular the traditional corporate literature by including multiple organizational types. Sustainability researchers should focus on green decisions that both enhance organizational stability and ecological sustainability if they wish to better understand creative green solutions from organizations.
45

Green Decision Making by Organizations: Understanding Strategic Energy Choices

Gliedt, Travis 20 September 2011 (has links)
There is a growing need to better understand environmental decision making in the context of climate change and limited renewable resources. This dissertation deepens our understanding of such decision making by focusing on strategic green decisions, which can be defined as the individual and collaborative green decisions within or between organizations that help organizations improve their operating position, adapt to changes in their external institutional environments, and simultaneously generate environmental benefits. The particular focus is on decisions related to energy in the North American context. The research draws on and contributes to organizational theory with the aim of better understanding those factors that motivate and/or facilitate green decisions by organizations, especially social economy organizations—an area of only limited research to date. Two complementary empirical studies address the overarching research goal. The first study focuses on understanding the nature and extent of the association between organizational attributes and those factors that motivate and/or facilitate a green energy decision. Insights are based on a bi-national survey of 212 organizations that voluntarily began to purchase green electricity between 1999 and 2008. Findings indicate that important influences are similar across organizational types. Survey results highlight the importance of organizational culture and internal champions—both individually and in combination—in making the initial decision to purchase green electricity, despite its relatively higher price. These two factors, as well as strategic benefits, emerge as the dominant explanations for why organizations expand their green energy purchases. The relative importance and particular roles of these factors vary across organizational and decision types. The second empirical study extends our understanding of how organizations adapt to external changes while maintaining the capacity to innovate in order to address their core objectives. The focus is on the residential energy services market, and is based on 12 interviews with the executive directors of non-profit environmental service organizations (ESOs) that are part of a national network called Green Communities Canada. These organizations survived a funding shock by creating new services and diversifying funding sources with actions that collectively can be referred to as ‘green collaborative entrepreneurship’; collaborative because it was facilitated by strategic partnerships with businesses and local governments, as well as the cross-national social capital network connecting the ESOs. The important motivating factors of green collaborative entrepreneurship were the green values and objectives that drive these organizations. The facilitating factors of green collaborative entrepreneurship included human capital, social capital and strategic partnerships, which acted as dynamic capabilities because of their flexibility to help increase the level of entrepreneurship when necessary for organizational survival, and yet, scale-up and deliver core programs during stable funding periods. The dissertation provides important insights into broad questions related to green decisions, especially for organizations that are affected by political policy cycles. The findings highlight that organizations are able to be more environmentally sustainable while also improving their own strategic performance by making green decisions that either provide the capacity to adapt to exogenous change for survival, or to create endogenous change for competitive advantage. The research contributes to our understanding of societal transitions to sustainable development by highlighting two green decisions that are occurring in the social economy. The dissertation contributes to organizational theory and in particular the traditional corporate literature by including multiple organizational types. Sustainability researchers should focus on green decisions that both enhance organizational stability and ecological sustainability if they wish to better understand creative green solutions from organizations.
46

THREE ESSAYS ON UNCERTAINTY: POLICY REACTIONS AND FINANCIAL CONSEQUENCES / THREE ESSAYS ON UNCERTAINTY: POLICY REACTIONS AND FINANCIAL CONSEQUENCES

DRAGOMIRESCU GAINA, CATALIN FLORINEL 16 April 2020 (has links)
La presente tesi si concentra sull’incertezza e sulla sua relazione con il rischio finanziario, due importanti concetti in economia e finanza. Il primo capitolo propone un approccio analitico in grado di separare gli shock connessi all’incertezza finanziaria dagli shock legati all’incertezze politiche, utilizzando un campione di paesi appartenti all’area Euro, dove la diffusione di shock da un paese all’altro (effetti di spillover) rendono l’identificazione più complessa. I risultati indicano che la BCE favorisce adottare una condotta proattiva verso gli shock di incertezza politica, e una più passiva verso gli shock di incertezza finanziaria. Il secondo capitolo discute il trade-off tra accuratezza della previsione e velocità di reazione che consente agli hedge fund di incrementare i profitti durante periodi caratterizzati da elevata incertezza. In questo capitolo si propone un metodo matematico per l’analisi di tale trade-off utilizzando un approccio Bayesiano. I risultati empirici e le simulazioni effettuate indicano che previsioni meno accurate sono associate ad aumenti di velocità. Infine, il terzo capitolo analizza alcune problematiche inerenti alla transizione ad un’economia a basso impatto ambientale, tenendo conto che la presenza di incertezza e asimmetrie informative potrebbero amplificare o limitare i pregiudizi comportamentali degli investitori. / This thesis focuses on broader or Knightian uncertainty and its relation with financial uncertainty or risk, given the overlaps existing between these two important concepts in the economics and finance literature. The first chapter adds to the existing stock of analytical methods able to disentangle financial from policy-related uncertainty shocks within a sample of Euro Area countries, where cross-border spill-overs can raise identification challenges. In terms of policy reactions, the results point to ECB having adopted a pro-active stance towards policy uncertainty shocks, but a more passive or accommodative stance towards financial uncertainty shocks. The second chapter discusses the trade-off between prediction accuracy and reaction speed that allows hedge funds to better time the market and profit during periods of turmoil and high uncertainty. It proposes a mathematical formulation of the trade-off that casts the decision-making process in a Bayesian framework. The empirical results, pointing to speed gains associated with less accurate predictions, are justified in a simulation exercise. The third chapter discusses some challenges arising from the ongoing transition to a low-carbon economy in a market context dominated by multiple uncertainty sources and information frictions that can either amplify or reduce investors’ own behavioural biases.
47

On the implementation of green airport facilities by integrating electric airplanes: A case study : A potential solution for future green airports

Larsson, Oscar January 2023 (has links)
Following continued emission of greenhouse gases climate change is increasingly becoming a greater threat to the continued well-being of people around the world. While airports contribute around 2.5% of the global greenhouse emissions it delivers the greenhouse gases higher up in the atmosphere which increases the negative effect of greenhouse gases. In response airports around Sweden are working towards implementing green airports and flights. This will be done in part by supplying the facility with green energy from local green power facilities but also in part by replacing the traditional fuel from petroleum-based flights to electrical flights. This report examines the required solar plant to support both the existing facility and the future planned electrical flights with solar energy. This report will examine the required size and configuration of the solar plant to supply necessary power with the help of the simulation tool SAM and weather data from NSRDB. This report will also investigate the current system capabilities and required changes to handle the increased load demand and power production into the facility using power flow simulations of the current system with the future loads
48

Engergieffektivt Bostadsområde : Förstudie Till Aktivhusområde i Halmstad

Andreas, Andmarsjö, Oscar, Porsblad January 2011 (has links)
In the thesis we have shown that it is possible with current technology, to buildneighborhoods that are largely self-sufficient. We have obtained some information aboutongoing work in the field of energy efficient buildings and active house which we have usedto develop a model. The feasibility study for Ranagård we have e.g been forced tofollow laws on groundwater covered, resulting in the construction of basements for singlefamilyhome is not possible. The model that we have built up overtime has been the central part of the work. The model illustrates very well what an activehouse neighborhood means and potential of such an area. Important to note here is the resultwe finally arrived at only can be applied for Ranagård in Halmstad municipality as theconditions vary so much at the local/municipal level.
49

Vliv kogenerace na energetiku a trh s elektrickou energií v ČR / Cogeneration influence on power industry and power market in Czech Republic

Dudáš, Michal January 2014 (has links)
The main goal of this master’s thesis is to find out the impact of future development in combined heat and power technologies, especially the impact on power market in Czech Republic regarding to historical development of photovoltaics and subsidy policy. There are three scenarios of installed power growth designed including calculations of renewable energy source financial fee as well as overall evaluation. The paper also deals with current status of combined heat and power technologies in Czech Republic, European Union and USA as well as legislature framework of CHP in Czech Republic and EU. There are also kinds of state grants described. In economical part of the paper there are NPV’s of particular cogeneration units calculated. The calculations were made both with current investment costs and reduced investment costs.
50

LAN and WLAN planning, deployment, and evaluation

Magnusson, Maria January 2013 (has links)
Switch Nordic Green AB (Nordic Green Energy) is an energy company with about 40 employees. The customer service department is in-house and a lot of the work, by all departments, is done by programs running on remote servers.  Today most of the network traffic is through a wired local area network, although there is a wireless guest network which is very unstable. While planning a move to a smaller office the company is planning to implement a more extensive wireless local area network. This bachelor thesis will provide a basis for implementing the local area network and wireless local area network for the company's new office. The thesis will also establish the network platform for an eventual move of a department within the company located in Finland. This documentation will enable the company to save both time and money.  With a local area network, designed and implemented for the new office, the employees will have the best possibility to improve their work and it will also increase the efficiency of the company. / Switch Nordic Green AB (Nordic Green Energy) är ett elbolag med cirka 40 anställda. Kundtjänsten sköts internt och mycket av arbetet, även på de andra avdelningarna, sker mot fjärrservrar. Idag ligger majoriteten av nätverkstraffien på ett trådat lokalt nätverk, men det finns även ett trådlöst gästnätverk, som dock är väldigt instabilt. När företaget ska flytta till ett mindre kontor planerar de att implementera ett mer omfattande trådlöst nätverk. Den här kandidatexamenauppsatsen kommer användas som grund för implementationen av både trådat och trådlöst lokalt nätverk på det nya kontoret. Uppsatsen ska upprätta en nätverksplattform som kan användas vid en eventuell framtida flytt av företagets kontor i Finland. Med denna dokumentation tillgänglig kan företaget spara både tid och pengar.  Med ett lokalt nätverk som är designat och implementerat för det nya kontoret har de anställda möjlighet att förbättra sin arbetainsats och företagets effektivitet.

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