Search for dissertations about: "Electronic energy transfer"

Showing result 1 - 5 of 249 swedish dissertations containing the words Electronic energy transfer.

  2. 1. Supermarket refrigeration systems for demand response in smart grids

    Author : Tommie Månsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Supermarket; Demand-side management; Smart-Grid; Energy efficiency; Food retail; Demandresponse; Thermal modelling; Refrigerated Display Cabinet; Renewable energy;

    Abstract : With an increasing share of intermittent renewable energy sources in the electrical grid, the need for adapting the demand to the available supply of electricity becomes increasingly important. Within this thesis, the demand response capacity by supermarket refrigeration systems are investigated and methods for enabling it is developed. READ MORE

  4. 2. Tuning of Energy and Electron Transfer Rates in Donor-Bridge-Acceptor Systems

    Author : Karin Pettersson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; electron transfer; electronic coupling; paramagnetic species; superexchange; Donor-bridge-acceptor system; spectroscopy.; porphyrin; sequential electron transfer; Förster energy transfer; energy transfer;

    Abstract : The intramolecular processes of Donor-Bridge-Acceptor (D-B-A) systems have been investigated by spectroscopic methods. The systems consist of porphyrin donors and acceptors linked by oligo-p-phenyleneethynylene bridges. READ MORE

  5. 3. Numerical predictions of heat-transfer applied to electrical machines

    Author : Kristian Rönnberg; Christophe Duwig; Anders Dahlkild; Luca Peretti; Jens Honore Walther; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric machines; energy efficiency; heat transfer; thermal management; high fidelity simulation; computational fluid dynamics CFD ; proper orthogonal decomposition POD ; lumped parameter thermal network LPTN ; Elektriska maskiner; energieffektivitet; verkningsgrad; värmeöverföring; värmehantering; simuleringar med hög upplösning; strömningsmekaniska beräkningar; proper orthogonal decomposition POD ; termiska nätverk; Teknisk mekanik; Engineering Mechanics;

    Abstract : In order to meet the need for increased electrification, and at the same time reduce the total demand for electric energy, behavior change and technological innovation is needed. Over the decades power density of electric motors have increased, leading to increased demands on the cooling system design and performance. READ MORE

  6. 4. Efficient Trading in the Short-term Electricity Markets for Integration of Renewable Energy Sources : Multistage Stochastic and Agent-based Modeling Approaches for Continuous Intraday Electricity Market

    Author : Priyanka Shinde; Mikael Amelin; Lennart Söder; Nikolaos Paterakis; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Continuous intraday electricity market; Virtual power plant; Trading strategy; Stochastic dual dynamic program; Agent-based modeling; Adaptive learning; Renewable energy sources; Cross-border intraday trading; Flow-based market coupling; Balancing market; Imbalance settlement cost; Randomized progressive hedging; Multistage stochastic programming; Energy storage; Intraday prices; Intraday price analysis; Time series analysis; Kontinuerliga intradagmarknaden; Virtuellt kraftverk; Handelsstrategi; Stokastisk dual dynamisk programmering; Agentbaserad modellering; Adaptivt l¨arande; F¨ornybara energik¨allor; Gr¨ans¨overskridande intradaghandel; Fl¨odesbaserad marknadskoppling; Balansmarknaden; Balansavr¨akningskostnader; Randomiserad progressive hedging; Stokastisk multiskedesprogrammering; Energilagring; Intradagpriser; Intradagprisanalys; Tidsserieanalys; Electrical Engineering; Elektro- och systemteknik;

    Abstract : This thesis investigates the role of different short-term electricity market design aspects that can facilitate better coordination of resources within the power system. The work also emphasizes on better cross-border integration of the short-term markets to improve the market liquidity, competition, social welfare, and flexibility in the system, which is essential for facilitating the integration of renewable sources. READ MORE

  7. 5. Wind-turbine harmonic emissions and propagation through a wind farm

    Author : Kai Yang; Åke Larsson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Renewable energy; Electric power system; Wind power; Power quality; Power system harmonics; Electric Power Engineering; Elkraftteknik; Energy Engineering; Energiteknik;

    Abstract : The increasing demand for sustainable energy is one of the driving forces behind the increasing use of wind power by means of wind-turbines in electric power systems. Modern wind turbines commonly employ variable-speed-generator technology associated with a power-electronic converter as part of the grid connection. READ MORE