Sökning: "conventional oil"

Visar resultat 16 - 20 av 98 avhandlingar innehållade orden conventional oil.

1. 16. Environmental taxation - Empirical and Theoretical Applications

   Författare :Åsa Löfgren; Göteborgs universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Oil; Decomposition; Gasoline; Policy instruments; Causality; Political economy; Optimal taxation; Habit formation; Environment; Intertemporal choice;

   Sammanfattning : This thesis consists of five self-contained articles, and hence each paper can be read independently. Still, all five papers have one important feature in common: environmental taxation. LÄS MER

3. 17. Extraction and chromatography of bioactive compounds in complex samples using supercritical CO2 technology

   Författare :Said Alhamimi; Centrum för analys och syntes; []
   Nyckelord :Supercritical CO2; Chromatography; Extraction; Mass transfer; Solubility;

   Sammanfattning : Bioactive compounds found in plants have been of interest to man since ancient times. These compounds have the ability to modulate the metabolic processes in our bodies, which suggests that they may promote better health. Bioactive compounds vary in their chemical structure, polarity, stability and biological activity. LÄS MER

4. 18. Towards functional characterisation for cylinder liner surfaces

   Författare :Cecilia Anderberg; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The demands on decreased environmental impact from vehicles force the automotive industry to develop engines with reduced engine oil and fuel consumption. Frictional losses in the piston ring cylinder liner system accounts for approximately 20 % of the total frictional losses within an engine. LÄS MER

5. 19. Fischer-Tropsch and FAME Fuels as Alternatives for Diesel Engines; an Experimental Study

   Författare :Monica Johansson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Emissions; SME; Fischer-Tropsch; NOx; Combustion; Alternative fuels; Soot; Biodiesel; RME; FAME; GTL; PME;

   Sammanfattning : Research into alternative fuels is necessitated by our heavy reliance on limited oil reserves and increasingly strict emissions legislation. The studies reported in this thesis involved conducting engine tests using alternatives to fossil Diesel fuel in both heavy-duty and light-duty single cylinder engines. LÄS MER

7. 20. CFD Modelling of a Free-Piston Engine Using Detailed Chemistry

   Författare :Miriam Bergman; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; free-piston; combustion; Diesel; compression ignition; chemical kinetics; HCCI; Computational Fluid Dynamics;

   Sammanfattning : The Free Piston Engine, FPE, which is capable of operating in a variable compression ratio mode, is highly suitable for the promising Homogeneous Charge Compression Ignition (HCCI) concept, allowing flexible auto-ignition control on a cycle-to-cycle basis without any hardware modifications. In this study, the effects of varying the start of injection on the emission formation and efficiency of such an engine have been investigated, using simulations based on the KIVA-3V CFD code. LÄS MER