Sökning: "fossil field systems"

Visar resultat 1 - 5 av 30 avhandlingar innehållade orden fossil field systems.

  1. 1. Island-based Polygeneration Systems : On the Feasibility of Solar-Biomass-driven Distributed Concepts

    Författare :Moritz Wegener; Anders Malmquist; Andrew R. Martin; Antonio Isalgué; Natasa Nord; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polygeneration; Distributed energy systems; Biomass; Solar energy; PV-Battery; Small-scale energy systems; techno-economic analysis; Island-based systems; Energiteknik; Energy Technology;

    Sammanfattning : The colossal risks and challenges posed by climate change require innovative solutions that must fulfil energy service demands sustainably. The concept of small-scale, biomass-based polygeneration (SBP) is one such technological approach, which optimizes locally supplied fuels to provide several energy services like electricity, heating, cooling, potable water, and/or bio-chemical products. LÄS MER

  2. 2. Conducting Polymer Electrodes for Thermogalvanic Cells

    Författare :Kosala Wijeratne; Xavier Crispin; Sawako Nakamae; Linköpings universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Fossil fuels are still the dominant (ca. 80%) energy source in our society. A significant fraction is used to generate electricity with a heat engine possessing an efficiency of approximately 35%. Therefore, about 65% of fossil fuel energy is wasted in heat. LÄS MER

  3. 3. Där människor, handling och tid möts : En studie av det förromerska landskapet på Gotland

    Författare :Anna Arnberg; Kerstin Cassel; Anders Kaliff; Stockholms universitet; []
    Nyckelord :HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; Gotland; pre-Roman Iron Age; landscape; fossil field systems; agriculture; settlements; iron; iron-making; ring-forts; burials; burial grounds; burial customs; Archaeology; Arkeologi; arkeologi; Archaeology;

    Sammanfattning : This thesis is concerned with the pre-Roman Iron Age on Gotland (500 BC–AD). The remains studied comprise artefacts, fossil field systems, ring-forts, burial localities, and places for iron-making, and more. The author focuses on the landscape formed by these remains, in an attempt to understand the people and society behind them. LÄS MER

  4. 4. On design and analysis of synchronous permanent magnet machines for field-weakening operation in hybrid electric vehicles

    Författare :Freddy Magnussen; Chandur Sadarangani; Barrie Mecrow; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Applied mechanics; permanent magnet machines; field-weakening; hybrid electric vehicles; soft magnetic composites; fractional pitch concentrated windings; Teknisk mekanik; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : A regular vehicle of today is equipped with an internal combustion engine that runs on either gasoline or diesel, which are fossil fuels from oil reserves that are millions of years old. In all types of combustion processes carbon dioxide and several other emissions are produced. LÄS MER

  5. 5. Sustainable Business Innovation of Photovoltaic Water Pumping Systems

    Författare :Chi Zhang; Jinyue Yan; Per Alvfors; Bin Chen; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PV water pumping; Economic assessment; Ecological benefits; Business model innovation; Case study; Chemical Engineering; Kemiteknik;

    Sammanfattning : The development of renewable energy technology provides an effective approach to replace fossil fuels for greenhouse gas (GHG) emission. Technological innovation and transfer are the main driving forces in promoting renewable energy usage, because of the better efficiency and economic payback under an emission reduction target. LÄS MER