Avancerad sökning

Visar resultat 1 - 5 av 48 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Förnyelse med förhinder : Den riksdagspolitiska debatten om omställningen av energisystemet 1980-2010

   Författare :Ann-Sofie Kall; Jonas Anshelm; Vasilis Galis; Tomas Kåberger; Kajsa Ellegård; Per Högselius; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Renewable energy sources; energy politics; parliamentary debate; problematization; boundary object; Omställningen av energisystemet; förnybara energikällor; energipolitik; riksdagsdebatt; problematisering; gränsobjekt; Technology and social change; Teknik och social förändring;

   Sammanfattning : Denna avhandling undersöker hur omställningen av energisystemet har konstruerats i den riksdagspolitiska debatten, med fokus på förnybara energikällor. Utgångspunkten är det riksdagsbeslut som fattades 1980 och som innebar en omställning till förnybara energikällor. Studien bygger på textanalys av framför allt riksdagsprotokoll. LÄS MER

3. 2. Techno-economic analysis and optimization of electrochemical energy storage solutions

   Författare :Guido Lorenzi; Andrew R. Martin; Carlos Silva; Massimo Santarelli; Kari Alanne; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Energy Storage; Battery Energy Storage; Lithium-ion Batteries; Vanadium Flow Batteries; Power-to-Gas; Electrolysis; Biogas Upgrading; Armazenamento de Energia Elétrica; Armazenamento de Energia em Baterias; Baterias de Iões de Lítio; Baterias de Fluxo de Vanádio; Power-to-Gas; Eletrólise; Upgrading de Biogás; Elenergilagring; batterilagring; litiumjonbatterier; vanadinflödesbatterier; elkraft-till-gas; elektrolys; biogasuppgradering; Energy Technology; Energiteknik;

   Sammanfattning : The need to integrate the rapidly growing share of variable renewable energy sources in the power sector requires solutions that are capable of mitigating the intermittent nature of these sources. They are expected to constitute the backbone of the electricity generation system in the coming years in order to reach ambitious goals in terms of energy security and reduction of environmental impact. LÄS MER

4. 3. Hybrid energy storage systems : Capacity optimization and environmental implication of hybrid energy storage systems in renewable power systems

   Författare :Yang Jiao; Daniel Månsson; Alfred Rufer; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Electricity production contributes a large share of greenhouse gas emissions that lead to climate change. At present, power generation in many parts of the world still heavily depends on fossil fuels. To prevent global warming, the electricity sector is supposed to transition from the current fuel mix to renewable energy sources. LÄS MER

5. 4. Composite Nanostructured Materials for Renewable Energy Applications

   Författare :Elfatih Mohammed Mustafa; Omer Nur; Magnus Willander; Malik Maaza; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solar energy; Photocatalysis; Solar cells; Nanostructured materials; ZnO; CuO; Ta2O5; GaAs;

   Sammanfattning : Diverse sources of energy are becoming increasingly significant in today's world. The most common source of energy today is fossil fuels, such as coal, oil, and gas. While this energy source has many advantages, it also comes with many problems. LÄS MER

7. 5. Dynamic Thermal Rating for Improved Utilization of Wind Farm Export Systems : A Methodology for Improving Load Profile Estimation of Wind Farm Export Transformers

   Författare :Zhongtian Li; Patrik Hilber; Tor Laneryd; Stefan Ivanell; Nguyen Nga; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dynamic thermal rating; wake effect; turbine availability; transformer lifetime; transformer aging; dynamisk termisk klassificering; väckningseffekt; turbintillgänglighet; transformatorlivslängd; transformatoråldring; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The power system components connected to renewable energy sources, such as transformers, are often oversized and conservatively loaded. The design of transformers normally ignores the intermittent nature of the connected renewable energy sources (e.g. solar, wind). LÄS MER