Sökning: "Heat Switch"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden Heat Switch.

  1. 1. Phase dependent heat transport in superconducting junctions with scattering theory

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Fatemeh Hajiloo; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; heat transport; heat conductance; scattering theory; superconducting hybrid devices; conductance fluctuations; phase dependent heat currents;

    Sammanfattning : The operation of nanoscale devices at low temperatures is highly sensitive to heating effects. This motivates current research on controlling heat currents in these devices. LÄS MER

  2. 2. Turbulent Forced Convection Air Cooling of Electronics with Heat Sinks Under Flow Bypass Conditions

    Detta är en avhandling från Stockholm : KTH

    Författare :Hans Jonsson; KTH.; [2001]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; forced convection; heat transfer; pressure drop; turbulent; air cooling; bypass; plate; strip; pin; fin; heat sink; electronics; experimental; numerical; CFD; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Air cooling is still the dominant method for dissipating theheat produced by electronic components. In a typical electronicdevice, the components are situated on a Printed Circuit Board(PCB). For most applications natural convection is sufficientto cool the components. LÄS MER

  3. 3. Time-dependent relaxation of charge and energy in electronic nanosystems

    Detta är en avhandling från Stockholm : KTH

    Författare :Jens Schulenborg; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; heat current; quantum dot; relaxation rate; rate detection; generalization of hermiticity; nonunitary dynamics; open quantum system; Coulomb charging energy; voltage switch; transient response; electronic nanosystem;

    Sammanfattning : The study of the dynamics of strongly confined, interacting open quantum systems has attracted great interest over the past years, due to potential applications in nanoelectronics, metrology as well as quantum information. Most recent experimental and theoretical research in this field has shifted attention towards electronic heat currents, recognizing their potential for practical purposes as well as for tests of fundamental theories, and also aiming to control the inevitable heat dissipation of any dynamically operated electronic device. LÄS MER

  4. 4. Improved Energy Efficiency and Fuel Substitution in the Iron and Steel Industry

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Maria Johansson; Linköpings universitet.; Linköpings universitet.; Högskolan i Gävle.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; iron and steel industry; energy efficiency; CO2 emissions; fuel substitution; fuel switch; excess heat; biomass gasification; bio-syngas; synthetic natural gas; SNG; energy market scenarios; energy management; barriers; driving forces; järn- och stålindustrin; energieffektivisering; CO2-utsläpp; bränslebyte; överskottsvärme; restvärme; förgasning; bio-syntesgas; syntetisk naturgas; SNG; energimarknadsscenarier; energiledning; hinder; drivkrafter;

    Sammanfattning : Halterna av växthusgaserna koldioxid (CO2), metan och kväveoxider har under de senaste 800 000 åren aldrig varit högre i atmosfären än vad de är idag. Detta resultat redovisades i IPCCs klimatrapport år 2013. LÄS MER

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

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Arash Edvin Risseh; KTH.; [2019]
    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