Sökning: "oil efficiency"

Visar resultat 21 - 25 av 175 avhandlingar innehållade orden oil efficiency.

  1. 21. An evaluation of biodiesel policies : The case of palm oil agro-industry in Indonesia

    Författare :Fumi Harahap; Semida Silveira; Serina Ahlgren; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; palm oil; biodiesel; Indonesia; policy evaluation; policy coherence analysis; land allocation; sectoral policy goals; life cycle cost analysis; biodiesel cost competitiveness; biorefinery; Energy Technology; Energiteknik;

    Sammanfattning : Oil palm has flourished as an economically vital crop in Indonesia given its use in both food and non-food products (including biodiesel) for domestic and export markets. However, the expansion of oil palm plantations in Indonesia is controversial. LÄS MER

  3. 22. System studies of different CO2 mitigation options in the oil refining industry: Post-combustion CO2 capture and biomass gasification

    Författare :Daniella Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; process integration; post-combustion CO2 capture. CO2 capture and storage CCS ; GHG emissions; oil refining industry; CO2 emissions; Fischer-Tropsch FT ; biomass gasification; energy market scenarios;

    Sammanfattning : To reach the objective endorsed by the EU Council for reducing EU greenhouse gas (GHG) emissions by 80-90% compared to 1990 levels by 2050, extensive cuts are necessary in all sectors. The oil refining sector is a major energy user and thus a major GHG emitter. LÄS MER

  4. 23. Exploring synergies between the palm oil industry and bioenergy production in Indonesia

    Författare :Fumi Harahap; Semida Silveira; Dilip Khatiwada; José Roberto Moreira; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; palm oil industry; bioenergy; resource efficiency; sustainability; land allocation; palm oil biomass; biorefinery; policy coherence analysis; techno-economic analysis; spatio-temporal optimisation model; BeWhere Indonesia; Energy Technology; Energiteknik;

    Sammanfattning : Climate change along with increasing demand for food and fuel call for sustainable use of natural resources. One way to address these concerns is through efficient use of resources, which is also vital for the achievement of the Sustainable Development Goals and the Paris Agreement. LÄS MER

  5. 24. Engine Encapsulation for Increased Fuel Efficiency of Road Vehicles

    Författare :Blago Minovski; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coupled simulations; powertain cooling systems; warm-up; 1D simulations; thermal engine encapsulation; cool-down; fuel consumption; numerical analysis; 3D CFD simulations;

    Sammanfattning : Thermal engine encapsulation is an increasingly popular design choice, which insulates the engine from the external environment and retains heat in the engine after it is turned off. This decelerates motor cool-down and increases the probability for high initial temperature at a subsequent engine start, resulting in shorter warm-up and reduced friction between engine parts. LÄS MER

  7. 25. Protective Tribofilms on Combustion Engine Valves

    Författare :Robin Elo; Staffan Jacobson; Mikael Åstrand; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Internal combustion engine; valve; sealing surface; tribofilm; oil residue; test rig; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Sammanfattning : Inside the complex machinery of modern heavy-duty engines, the sealing surfaces of the valve and valve seat insert have to endure. Right next to the combustion, temperatures are high and high pressure deforms the components, causing a small relative motion in the interface. LÄS MER