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Computational investigation of air-biogas mixing device for different biogas substitutions and engine load variations

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  • Chandekar, Akash Chandrabhan
  • Debnath, Biplab Kumar

Abstract

Biogas, an alternative fuel, has potential to be applied in diesel engines. To employ biogas in diesel engine of dual fuel type, air-biogas mixer is required. In an earlier design of the mixer, venturi mixer with two biogas inlets was hardly giving homogeneous mixture. In this work, venturi mixer is redesigned taking into account the gaps of the existing literatures, for different gas substitutions and engine loads. In this work, the air-biogas venturi mixer is studied with computational fluid dynamics. The mixer has three biogas inlets each of 7.2 mm diameter and placed 120° apart from each other at the throat. At various biogas substitutions, engine load conditions and at consequent variations of air supply, the amount of biogas and diesel are needed to be varied. Hence, there is a need to investigate the mixer for various biogas substitutions and load variations. The substitution levels analyzed are 80%, 60%, 40% and 20%. The same mixer is also analyzed for different engine loads. The results show that, the distribution of biogas in the divergent portion of the mixer is quite uniform for different substitution levels and engine load variations. Thus mixer is observed to meet the functional requirements in aforementioned cases.

Suggested Citation

  • Chandekar, Akash Chandrabhan & Debnath, Biplab Kumar, 2018. "Computational investigation of air-biogas mixing device for different biogas substitutions and engine load variations," Renewable Energy, Elsevier, vol. 127(C), pages 811-824.
    • Handle: RePEc:eee:renene:v:127:y:2018:i:c:p:811-824
    DOI: 10.1016/j.renene.2018.05.003
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    Cited by:

    1. da Costa, Roberto Berlini Rodrigues & Valle, Ramón Molina & Hernández, Juan J. & Malaquias, Augusto César Teixeira & Coronado, Christian J.R. & Pujatti, Fabrício José Pacheco, 2020. "Experimental investigation on the potential of biogas/ethanol dual-fuel spark-ignition engine for power generation: Combustion, performance and pollutant emission analysis," Applied Energy, Elsevier, vol. 261(C).
    2. Alarico Macor & Alberto Benato, 2020. "Regulated Emissions of Biogas Engines—On Site Experimental Measurements and Damage Assessment on Human Health," Energies, MDPI, vol. 13(5), pages 1-38, February.
    3. Al-Rashed, Abdullah A.A.A. & Afrand, Masoud, 2021. "Multi-criteria exergoeconomic optimization for a combined gas turbine-supercritical CO2 plant with compressor intake cooling fueled by biogas from anaerobic digestion," Energy, Elsevier, vol. 223(C).

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