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Two- and Three-Stage Natural Gas Combustion System—Experimental Comparative Analysis

Author

Listed:
  • Ireneusz Pielecha

    (Faculty of Civil and Transport Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Filip Szwajca

    (Faculty of Civil and Transport Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

Abstract

The use of fuels with tendencies to reduce carbon dioxide emissions, particularly gaseous fuels, and improve combustion systems is one of the directions for increasing an internal combustion engine’s attractiveness as a power source. This article presents the effects of combining natural gas combustion with a multi-stage combustion system. A two- and three-stage lean charge combustion system was proposed in order to increase the energy system efficiency. In order to achieve this, a single-cylinder test engine was used, with two interchangeably implemented combustion systems. The tests were carried out with two values of the excess air coefficient (λ = 1.3 and λ = 1.5), as well as two different fuel dose values (qo = 0.35 and 0.55 mg/inj), injected into the prechamber at the same indicated mean effective pressure value (IMEP = 6.5 bar) and the same engine speed (n = 1500 rpm). Based on the obtained research results, it was found that the use of a three-stage system limited the maximum combustion pressure and heat release rate due to the increased resistance of flows between the chambers. At the same time, it was found that the increase in the engine’s indicated efficiency took place in a two-stage system, regardless of the excess air coefficient. Changing the dose of fuel fed into the prechamber significantly affects the engine performance (and efficiency) but only in the two-stage combustion system.

Suggested Citation

  • Ireneusz Pielecha & Filip Szwajca, 2023. "Two- and Three-Stage Natural Gas Combustion System—Experimental Comparative Analysis," Energies, MDPI, vol. 16(9), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:9:p:3837-:d:1136662
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    References listed on IDEAS

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