Sökning: "Alternate fuels"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Alternate fuels.

1. 1. Particulate Formation in Gasoline Direct Injection Engines

   Författare :Sreelekha Etikyala; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PM; Volatileorganic compounds; Gasoline Direct Injection; Particulate Number; Alternate fuels;

   Sammanfattning : Gasoline direct injection (GDI) engines are facing a great challenge because of the need to comply with increasingly stringent emission regulations while improving fuel economy. GDI engines are popularly known for their high fuel efficiency (by the standards of gasoline engines) and low emissions, enabling higher compression ratios and thus increased volumetric efficiency. LÄS MER

3. 2. Particulate Formation in GDI Engines

   Författare :Sreelekha Etikyala; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PM; Alternate fuels; Gasoline Direct Injection; internal combustion engines; Particulate Number; Load transients;

   Sammanfattning : The need to comply with stringent emission regulations while improving fuel economy and reducing criteria pollutant emissions from transportation presents a major challenge in the design of gasoline Direct Injection (DI) engines because of the adverse effects of ultrafine Particulate Number (PN) emissions on human health and other environmental concerns. With upcoming advances in vehicle electrification, it may be the case that electric vehicles completely replace all current vehicles powered by internal combustion engines ensuring zero emissions. LÄS MER

4. 3. Valorization of biomass related substrates into value added chemicals : Hydrogen transfer catalysis

   Författare :Nitish Kumar Garg; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biomass; levulinic acid; hydrosilylation; borrowing-hydrogen; N-alkylation;

   Sammanfattning : In the current global scenario, it is evident that global warming and climate change are primarily driven by emissions stemming from the utilization of fossil fuels. Yet, if we look around, most of what we see is made from or linked to fossil fuels and it clearly shows our over-dependency on fossil fuels and hence there is a significant need to develop alternate sources of energy and raw materials to tackle these problems. LÄS MER

5. 4. Atomistic Modelling of Low Dimensional Materials for Energy Harvesting and Gas Sensing Applications

   Författare :S. Rabab Naqvi; Rajeev Ahuja; Abir De Sarkar; Uppsala universitet; []
   Nyckelord :Density functional theory; Low dimensional materials; Energy harvesting; Hydrogen storage; Gas Sensing; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Sammanfattning : Energy crisis and pollution are the two biggest issues of the present times which are extremely important to address on priority. Scientists/Researchers are trying to explore and create alternate means of energy production which are sustainable and free from greenhouse emissions. LÄS MER

7. 5. Properties of oxygen carriers based on natural and waste materials at high degrees of reduction

   Författare :Victor Purnomo; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high reduction; defluidization; chemical-looping gasification; oxygen carrier; reactivity;

   Sammanfattning : Oxygen carriers play an important role in multiple energy conversion processes, such as chemical-looping technology and oxygen-carrier-aided combustion. This thesis particularly explores how a high reduction degree of an oxygen carrier can affect its performance. LÄS MER