Sökning: "energy efficiency"
Visar resultat 1 - 5 av 2418 uppsatser innehållade orden energy efficiency.
- Master-uppsats, Mittuniversitetet/Institutionen för elektronikkonstruktion
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. Pre-renovation considerations for a Swedish single-family house : Analysis of energy saving potentialMaster-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik
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
- Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen
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
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. The Energy Savings Potential of a Heat Recovery Unit and Demand Controlled Ventilation in an Office BuildingUppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik
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