Sökning: "energy efficiency"

Visar resultat 1 - 5 av 2418 uppsatser innehållade orden energy efficiency.

  1. 1. Gate driver solutions for high power density SMPS using Silicon Carbide MOSFETs

    Master-uppsats, Mittuniversitetet/Institutionen för elektronikkonstruktion

    Författare :Farhan Akram; [2021]
    Nyckelord :SiC MOSFETs; Gate drivers; DC-DC converter; High power and efficiency power supplies;

    Sammanfattning : Discrete silicon carbide (SiC) power devices have unique characteristics that outpace those of silicon (Si) counterparts. The improved physical features have provided better faster switching, greater current densities, lower on-resistance, and temperature performances. LÄS MER

  2. 2. Pre-renovation considerations for a Swedish single-family house : Analysis of energy saving potential

    Master-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik

    Författare :Meghdeepa Choudhury; [2021]
    Nyckelord :;

    Sammanfattning : According to United Nations 7th sustainable development goal, increased use of fossil fuels in energy accounts for around 60 percent of total global greenhouse gas emissions and in order to debacle this crisis of global warming, the European Union aimed to reduce energy use by 32.5 % within 2030 by improving energy efficiency. LÄS MER

  3. 3. Material decomposition using a photon counting X-ray detector in low energy range

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Rasmus Solem; [2021]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Material decomposition in X-ray imaging is used to separate different materials or elements in an image and to quantify their respective concentration. The material decomposition and quantification are made possible by the dependency of attenuation on the attenuating material and photon energy. LÄS MER

  4. 4. Heat Transfer Analysis on the Applications to Heat Exchangers

    Master-uppsats,

    Författare :Raghu Lakshman Gundra; Jagadeesh reddy Medapati; [2021]
    Nyckelord :CFD anlysis; Heat exchangers; Heat transfer analysis; Heat equation temperature; Temperature equilibrium.;

    Sammanfattning : A heat exchanger is a device used to transfer thermal energy between two or more fluids, at different temperatures in thermal contact. They are widely used in aerospace, chemical industries, power plants, refineries, HVAC refrigeration, and in many industries. LÄS MER

  5. 5. The Energy Savings Potential of a Heat Recovery Unit and Demand Controlled Ventilation in an Office Building

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Fagernäs Martin; [2021]
    Nyckelord :Demand Controlled Ventilation; DCV; Heat Recovery Unit;

    Sammanfattning : The building sector is responsible for approximately 40 % of the total energy usage in Sweden. In office buildings the heating, ventilation and air conditioning system can account for up to 55 % of the energy usage. In order to reduce the energy usage of the heating, ventilation and air conditioning system different control methods are often used. LÄS MER