Sökning: "power source"

Visar resultat 6 - 10 av 793 avhandlingar innehållade orden power source.

1. 6. Waste-heat Recovery Using Thermoelectricity and Silicon Carbide Power Electronics

   Författare :Arash Edvin Risseh; Hans-Peter Nee; Torbjörn Thiringer; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermoelectricity; Power converter; Silicon Carbide; MOSFET; Power management; Thermoelectric generator; Renewable energy; Vehicle; Power electronic; Waste heat; Ultra-low inductance; Power module; Termoelektrisk energiomvandling; Kiselkarbid MOSFET; Effektomvandlare; Förnybar energikälla; Effektelektronik; Spillvärme; Effektmodul; Låg induktiv module; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Energy consumption in the world has increased continuously due to a growing population and increased energy consumption per capita. Moreover, the largest part of consumed energy still comes from fossil sources which in 2016 was more than 130 PWh. LÄS MER

3. 7. May the power be with you : managing power-performance tradeoffs in cloud data centers

   Författare :Jakub Krzywda; Erik Elmroth; Per-Olov Östberg; Ahmed Ali-Eldin; Tarek F. Abdelzaher; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cloud computing; data centers; power efficiency; power budgeting; application performance;

   Sammanfattning : The overall goal of the work presented in this thesis was to find ways of managing power-performance tradeoffs in cloud data centers. To this end, the relationships between the power consumption of data center servers and the performance of applications hosted in data centers are analyzed, models that capture these relationships are developed, and controllers to optimize the use of data center infrastructures are proposed. LÄS MER

4. 8. On Frequency Control Schemes in Power Systems with Large Amounts of Wind Power

   Författare :Camille Hamon; Lennart Söder; Magnus Perninge; Henrik Hult; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wind power; Stochastic optimal power flows; Frequency control schemes; Tertiary frequency control; uncertainty; power systems;

   Sammanfattning : In recent years, large investments have been made in wind power, and this trend is expected to continue in the coming decades. Integrating more wind power in the production mix offers great opportunities for the society, such as reducing greenhouse gas emissions and the dependence on foreign fuel. LÄS MER

5. 9. Power to gas : Bridging renewable electricity to the transport sector

   Författare :Farzad Mohseni; Per Alvfors; Mats Westermark; Lars Pettersson; Maria Grahn; Björn Frostell; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transport; renewable electricity; synthetic fuels; energy; power to gas;

   Sammanfattning : Globally, transport accounts for a significant part of the total energy utilization and is heavily dominated by fossil fuels. The main challenge is how the greenhouse gas emissions in road transport can be addressed. Moreover, the use of fossil fuels in road transport makes most countries or regions dependent on those with oil and/or gas assets. LÄS MER

7. 10. Like a wave : Understanding the film and TV industries in Korea and Sweden

   Författare :Su-Hyun Berg; Dominic Power; Johan Jansson; Oliver Ibert; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; knowledge creation and diffusion; film and TV industries; South Korea; Sweden; creative industries;

   Sammanfattning : This doctoral dissertation is concerned with the complex dynamics of knowledge in the South Korean film and TV industry and Swedish filmmaking from a spatiotemporal perspective. The film and TV industries are highly dependent on knowledge and innovation. LÄS MER