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Related Concept Videos

Internal Combustion Engine01:20

Internal Combustion Engine

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The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
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Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure
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Sustainable RCCI engine operation with an ANN based novel tri-fuel approach.

P V Elumalai1,2, Chin-Shiuh Shieh3, M Sreenivasa Reddy4

  • 1Department of Mechanical Engineering, Aditya University, Surampalem, AP, India. elumlalaimech89@gmail.com.

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Summary

This study explores a tri-fuel engine using diesel, biodiesel, and hydrogen, improving fuel economy and reducing emissions. The BD80H20 blend emerged as the most sustainable option, enhancing engine performance.

Keywords:
ANNMachine learning algorithmsPugh matrixRCCI engineSustainability assessmentTri-fuel approach

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Area of Science:

  • Alternative Fuels
  • Combustion Engineering
  • Sustainable Energy

Background:

  • Conventional diesel engines face challenges with efficiency and emissions.
  • Biodiesel and hydrogen offer potential as cleaner fuel alternatives.
  • Optimizing fuel blends is crucial for enhancing engine performance and environmental impact.

Purpose of the Study:

  • To investigate a novel tri-fuel Reactivity Controlled Compression Ignition (RCCI) engine strategy.
  • To evaluate the combustion efficiency and emissions of diesel, biodiesel (from Andropogon narudus), and hydrogen blends.
  • To determine the most sustainable fuel mixture for engine applications.

Main Methods:

  • Testing of biodiesel-biodiesel-hydrogen blends (BD80H20, BD70H30) in an RCCI engine.
  • Measurement of Brake Thermal Efficiency (BTE), fuel economy, and emissions (HC, CO, CO2, NOx).
  • Assessment of smoke opacity, in-cylinder pressure, and sustainability using Pugh matrix and Kiviat plot.
  • Validation of results using Artificial Neural Network (ANN) modeling.

Main Results:

  • Biodiesel blends (B20) reduced HC and CO emissions by 15% and 12% respectively compared to diesel.
  • Hydrogen-rich blends improved brake-specific fuel economy by 5-8% and further reduced CO emissions by 20-25%.
  • BD80H20 blend showed the highest sustainability, with improved BTE (3-5%) and reduced smoke opacity (18-25%).
  • An increase in CO2 and NOx emissions (10-15%) was observed with hydrogen addition, indicating an emission trade-off.

Conclusions:

  • The tri-fuel RCCI strategy using diesel, biodiesel, and hydrogen enhances engine efficiency and fuel economy.
  • Biodiesel and hydrogen blends significantly reduce harmful emissions like HC and CO.
  • BD80H20 represents the most sustainable fuel mixture, offering a promising alternative for cleaner combustion.