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Prediction of HCCI Engine Performance Using Blend of H2 and HC Fuel

Kajbaf, Ali | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42387 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Mozaffari, Ali Asghar
  7. Abstract:
  8. The idea of improving performance of internal combustion engines has always been important for researchers and manufacturers. In recent decades, due to limited resources of fossil fuels and introduction of vehicle emission regulations, researchers have undertaken more efforts to achieve goals such as increased horsepower, reduced fuel consumption and pollutant emissions reductions. Homogeneous charge compression ignition engine is a modern and efficient design that has attracted attention of many researchers. In[[ these engines, homogenous mixture of fuel and air enters into the combustion chamber and with a mechanism of self ignition, produces more power and has less fuel consumption compared with a similar SI engine. As a result, they have better thermal efficiency. But their main problem has always been engine combustion timing. In this study, the advantages and disadvantages of these engines are discussed and some research works for improving their performance are presented. Then, by introducing a computational model, combustion process of ethane and propane will be reviewed. Considering the positive effect of adding hydrogen to the main fuel on engine performance, the effects of different percentages of hydrogen additive is investigated. Based on the results obtained, the addition of hydrogen reduces unburned hydrocarbon and carbon monoxide emissions, but the exhaust nitrogen monoxide and nitrogen dioxide are increased
  9. Keywords:
  10. Compression Ignition ; Propane ; Hydrogen ; Ethane

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